money
RSS Facebook

RCMF

*

RCMF Donations

Enjoy using RCMF? How about a wee donation to help us keep you in the style to which you've become accustomed?

Welcome, Guest. Please login or register.
July 16, 2018, 06:08:10 AM

Login with username, password and session length

Articles

Author Topic: DH Venom  (Read 53757 times)

0 Members and 1 Guest are viewing this topic.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #40 on: October 03, 2006, 01:39:55 AM »
A bit more done on the Venom over the last couple of days. The inner boom structure has been glued into place on both booms, I added a plastic tube to the inside of each boom to run the servo extension cables down for the rudder servos. Before the tailplane is glued to the booms I am going to rub them down so they are almost ready for painting, last time I left this task till after the tail was attached and I had to take care when rubbing down as the assembly is subject to damage when not attached to the fuselage.



The tailplane and elevator has been made up, the cutouts in the tailplane are to give access to the elevator and rudder linkages when the assembly is glued together, the cutouts are inside the boom "bullets". These cutouts are not shown on the plans but I did these on the last Venom and it gave a lot more room to work inside the booms.



Cut outs were then made in the booms to slide the tailplane in and the structure was checked for correct alignment and incidence angles.



Whilst waiting for the glue to dry when assembling the tailplane and elevator I made up the mounting rails for the engine from aluminium bracket, this is obtainable from B&Q or similar, in different sizes, its useful stuff to have around. I also added the hatch ply support strips, there will be further support strips fore and aft added later.



The next job will be to attach the boom spars to the fuselage, these are supplied with the wrong angle cut so they have to be recut to the correct angle. I found on my first Venom the tubes were cut to 17 degrees where they should be cut to 13 degrees, (this would have caused the model to perform a spectacular loop on take off and likely disappear up its own orifice), however, the model need a litlle down trim to fly level so this time round I'm cutting them to 12 degrees, this slight change in incidence will, I hope, do away with the requirement for the down trim.


IB
A womans mind is cleaner than a mans.
She changes it more often.


Offline steve salmon

  • Trade Count: (0)
  • RCMF Flight Lieutenant
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 18
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #41 on: October 11, 2006, 12:25:40 PM »
Hi Ian

where did you get the noseleg oleo from, I have got micks oleo which looks a little flimsy

Steve

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #42 on: October 11, 2006, 22:42:02 PM »
The noseleg I have for the Venom is one MR supplies though it is made by Eurokit and their catalogue can be downloaded from their web site....................www.eurokitlucca.it

These are also obtainable from Motors and Rotors who stock their range, I certainly don't find mine flimsy though its been drilled  through for a 6mm pin type fixing and a brass insert added to give a little meat for the Allen grub screw to bite. With a little filing it can be made almost to exact scale. I've replaced the internal oleo spring with a much stiffer one so it won't bottom out as easy as I prefer any dampling action to come from the tyre itself.

 I've deviated from my normal covering method of tissue/dope/sanding sealer and I'm trying glass cloth and epoxy resin for the first time, so while I was covering the tailplane and waiting for it to dry between coats and rub downs I got on with a tricky part of the construction.............the engine access hatch, luckily I had the experience of finding out the tricks on the first build.

I use three ply tabs glued to the front of the hatch which key into three ply boxes glued into the fuselage, these are secured after glueing with glass cloth and resin.



These are the ply boxes in the fuselage, once done then the hatch is carefully sanded fore and aft only at this stage till it fits, then two ply seats are added to the inside of the fuselage to support the rear of the hatch.



Once this is done then the hatch can be carefully trimmed at the sides to fit, the hatch here sits on 1/16th ply rails that have been wetted or steamed into a curve to follow the wing section at this point, if flat ply seats are glued to the inside of the fuselage they will pull down the glass fuselage into a flatter section here that will prevent the hatch from fitting flush with the fuselage. After these were tacked in with thick Cyano I then reinforced the ply and fuselage with carbon fibre cloth and resin. This ensures the curve here is permanent and once done the final fitting of the hatch is done.

The front former for the hatch is added but only tack glued at the ends and middle initially, its not quite the right shape to match the fuselage at this stage, the hatch is trial fitted and I found that if a vertical cut in the middle of the former is now made the hatch now fits and follows the fuselage curve perfectly, whilst the hatch is in postion a scrap of 1/16th ply is glued the the centre of the former bridging the gap that has opened up, this is done by inserting ones arm up the jet orifice a la James Herriot fashion !! but without the sh*t on the arm after extraction.

The rear former is done the same way with the cut made in the formers centre and once done the fit is perfect but the hatch at this stage is a litlle flimsy so the addition of carbon fibre either side of the formers makes a rigid hatch that also fits as well





And finally the hatch in place, the method of securing to the fuselage is by a minature "Dzeus" fastener but this will be done at a later stage in the contruction.



Right, I'm off to indulge in my other passion for a week, diving..................... Red Sea here I come !!!


IB
A womans mind is cleaner than a mans.
She changes it more often.


Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #43 on: November 23, 2006, 23:50:13 PM »
Right, been diving, got wet, and the Red Sea isn't red its blue so I want my money back.

Done some more to the Venom, cut the tail boom tubes to the correct angle as they are supplied with the wrong angle at 17 degrees when they should be 11 - 12 degrees, and I found out where the error has crept in so next time I see Mick R I can pass on the info as he steadfastly refuses to admit there is an error. On the plan side view are two wing sections for the root, the one where the boom is mounted and the other is where the wing blends into the fuselage pod, the latter is 17 degrees to the datum and in error the tubes have been cut to this profile whereas they should have been cut to the other wing section shown where the angle measures 12 degrees. This photos show the tube before cutting and it can be seen it does stick up more than it should





Here are the tubes now in place with the booms attached,  a fair amount of setting up the airframe is required to get this right as the booms need to be parallel to the vertical datum hence the string along the top of the fuselage whilst the wing datum needs to be parallel to the work surface so the tail angle can be set up to be also parallel to the wing datum (work surface).
Once this is all set up the tubes are bolted through the wing, I used load spreading plates on the wing undersurface in the form of ali sheet 20mm by 70mm to stop the nut and washer biting into the sheet. Incidently, there is a solid piece of birch inside the wing at this point to stop the section collapsing when the nuts are tightened.
The tubes are glued to the upper surface as well as being held in place with the nuts and bolts and I will cover the tubes at the mounting points with glass fibre cloth and resin bonding them to the wing surface, this will prevent any sideways movement of the boom tubes under load conditions.







Once the glue has set and the glass and resin applied, the tailplane rigging is given a final check.  Then, a few spots of Fiberpoxy to secure the tailplane into the booms whilst the horizontal alignment is monitored and after this has set the booms can be removed from the tubes and the tailplane can be fully glued up.
The major part of the construction is now complete leaving only the flaps and rudders to contruct then onto the finishing stages.


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline rcfanuk

  • Senior Administrator
  • Trade Count: (0)
  • *
  • Thank You
  • -Given: 14
  • -Receive: 75
  • Posts: 5,624
  • Liked: 66
  • Country: gb
  • No, the other up !!
Re: DH Venom
« Reply #44 on: November 24, 2006, 11:25:20 AM »
Ian, looking good mate  :af, ref the boom tubes, are they strong enough as is, I assumed that they would slide into some construction in the wing that was tied to the wing spar's.

Steve
Global Moderator
Dawn Patrol UK


Offline p51p47

  • Trade Count: (+15)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 17
  • -Receive: 42
  • Posts: 12,500
  • Liked: 88
  • Country: gb
Re: DH Venom
« Reply #45 on: November 24, 2006, 13:40:44 PM »
I was thinking the same thing...................

Am I right in seeing a 'butt' joint of the 12 degree tube, onto the top skin of the wing, with a ply infill to take 2 bolts ?.

I appreciate there is some sort of 'fairing' to cover over the tube ends which will add a little more stiffness, but there is a MASSIVE amount of leverage on those long booms, being spread into a VERY small surface area on the TE of the wing..............

.............or are we missing something?

Phil
Real planes are green...anything without guns is a target. Fighteraces Warbird & Accessories

Offline nmacwarbirds

  • Trade Count: (0)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 2
  • -Receive: 45
  • Posts: 2,663
  • Liked: 303
  • Country: gb
  • No Guts, No Glory.
Re: DH Venom
« Reply #46 on: November 24, 2006, 14:01:56 PM »
Dear IB
It does not look much is holding those booms.
That could have been your problem with the last one.
They would last for a few flights and then start to fail
giving the impression you were going in and out of failsafe.
Please don't take offence, it is just a thought.
I would hate to hear this one has gone down.

I have heard of MR Lightnings doing similar things.
When the wing tubes that slide into the fus have not been housed strong enough.
Thus the wing angle of attack was continually changing.
Making it look like a roller coaster rather than a Lightning.

Regards Phil G.
Never in the field of human conflict was so much owed by so many to so few.
Coltishall Memorial Flight. 242 Sqn.


Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #47 on: November 24, 2006, 14:54:51 PM »
Hi All

I knew this "boom" mounting was going to raise a few eyebrows but all is not as it seems.

The plans, I must admit, if followed, don't give a fully rigid and strong mounting for the tubes as there is nothing between the upper and lower wing sheeting to prevent compression and flexing of the tubes once the booms have been fitted and I have my doubts as to the strength here under flight loads so I modified the mounting method on my first Venom and after the crash the wings were in one piece relatively undamaged until the fire destroyed one outer panel. The tubes and booms were fully intact and secured in place, this was the one area that did'nt fail on impact so I'm fully confident of the revised method out mounting the tubes.

What I have done is to fill the the space between the wing sheeting where the tube is mounted with a two inch wide, shaped to the aerofoil, piece of birch, this extends forward as far as the u/c plate and is keyed into the rear spar as well as the u/c plate. It is also bonded with Hysol to the root rib which is 1/8th marine grade plywood. The wing panel is glued to the fuselage pod and five inch wide glass cloth is applied top and bottom at the wing joint with two coats of resin. There are three load paths involved here as you can see so I'm confident the epoxy glass booms will fail before the mounting does.

This picture is of the wing from my first Venom showing the birch block before sheeting, on the new one, as mentioned, the block extends even further forward and it a little wider.



Phil,
The fairing cover which fits over the tube top and bottom is purely cosmetic.

On an aside, the Grumania Sea Venom really has a problem with strength, the booms on that model are of composite with no formers inside to stiffen the booms and the booms have the aerofoil cut out in them and are slid along the wing till they are in position and just glued. One tail strike on the port boom on take off on the one I've seen caused the boom to become loose which led to the plane only able to turn right and led to its demise.

IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline p51p47

  • Trade Count: (+15)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 17
  • -Receive: 42
  • Posts: 12,500
  • Liked: 88
  • Country: gb
Re: DH Venom
« Reply #48 on: November 24, 2006, 18:26:59 PM »
Ian.

Ok....thanks for the explanation................if you have hardpoints for the boom mounts extending well forwards, passing through the rear spar webs and attaching the the main gear plates, I agree that that should spread the loads far enough so any problem disappears..................

I CANNOT believe that this kits is still being sold without your (or a similar) modification being shown on he plan as standard. Have you approached Mick about this? as surely other builders have come across the same issues, and I'm sure those without a 'structural' mind will have blindly followed the instructions, and had a BADLY compromised rear end structure because of it...............

Phil
Real planes are green...anything without guns is a target. Fighteraces Warbird & Accessories


Offline Tiger

  • Trade Count: (0)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 1
  • -Receive: 0
  • Posts: 3,882
  • Liked: 0
  • Country: fr
  • GRRRRRRRRRRRR.................
Re: DH Venom
« Reply #49 on: November 24, 2006, 18:49:14 PM »
Quote
and had a BADLY compromised rear end structure because of it...............

Is there anything worse?............... ;D  ;D  ;D




Sorry, I just couldn't resist, I know this is serious really.............

I'll shut the door on the way out.........
I do have my failings................... fortunately, making mistakes is not one of them.

Offline p51p47

  • Trade Count: (+15)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 17
  • -Receive: 42
  • Posts: 12,500
  • Liked: 88
  • Country: gb
Re: DH Venom
« Reply #50 on: November 24, 2006, 18:52:59 PM »
..............don't even bother gettin ya coat  :ev
Real planes are green...anything without guns is a target. Fighteraces Warbird & Accessories

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #51 on: December 05, 2006, 18:03:23 PM »
Because the main u/c retract cylinders are inside the fuselage pod where I intend to fit two saddle tanks I needed to make up two custom fuel tanks to fit into this space. I also needed them to be as big as possible and around a litre capacity each.



Here's the space and the problem.

Out came the Jelutong and a quick drawing, some calculations and a plug was made.



Then I made up the moulds.



And the fuel tank glued together and sealed.



And now fitted into position.



I did a capacity test along with a preliminary leak test, it holds 1.2 litres (bonus) and did'nt leak. When the fittings are installed I will do a proper pressure test.
The Venom will have a total fuel capacity of 3 litres plus whats in the air trap, should give a comfortable 8-10 min flight.


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline steve salmon

  • Trade Count: (0)
  • RCMF Flight Lieutenant
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 18
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #52 on: December 17, 2006, 18:47:37 PM »
IB

I have got a MR venom near completion. Is there any chance, as you have the moulds,that you could knock me up a pair of tanks for a reasonable fee of course

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #53 on: December 17, 2006, 20:30:50 PM »
Hi Steve

Can do, no problem. It will be after the festivities though. I've sent you a PM.

ib
A womans mind is cleaner than a mans.
She changes it more often.

Offline steve salmon

  • Trade Count: (0)
  • RCMF Flight Lieutenant
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 18
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #54 on: December 17, 2006, 20:51:31 PM »
Hi Ian

re the tanks my email address is stevenksalmon@aol.com. If you email me your details I will get things through to you
Many thanks

Steve

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #55 on: December 18, 2006, 23:29:35 PM »
While I was making up the tanks I covered the wings in 1oz glass cloth and two coats of epoxy finishing resin. After doing the necessary with wet and dry it was now time to add the wing tip tanks.

First time round these were an absolute pain in the a*se to do, getting the two halves to fit together was like shoving spaghetti up a wild cats ar*e. The problem was in the way they had been moulded by the manufacturer, the original intention was to have one half semi circular with no stepped edge and the other half with a recessed step so it would fit inside the other half. Well, the best laid plans of mice and men etc. The half with the step has it recessed so it lies inside over one edge and sitting proud over the other edge, these were never going to fit though I managed with plenty of cyano and force.



This time round the mouldings are still the same so I decided to do away with the moulded in step and cut them plain and glue in my own step using 20 Thou strips of Plasticard. Here's what is provided, two round reinforcing formers ( that don't fit ).



I used tape to mark a straight line on both halves for the cut.



Adding the two formers and a stiffening strip to one half. The formers have to be sanded down to get the other half of the tank to fit correctly and I finished up sanding so much off the forward former that I had to add another former as a doubler to this former. Once satisfied with the fit I then mounted it onto the wing tip ensuring it was lined up with the centrlines etc. Balsa packing and lightweight filler was used to get a curved saddle and then it was finally screwed into place.



Once in place the other half with the plasticard strips was glued into place and all that is left to do is to apply some filler to hide the seam.



Does'nt look right though with see through tanks  :-\


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #56 on: January 23, 2007, 23:23:42 PM »
The wing tanks seams were filled and sanded to the correct shape and the forward extension added then some litho plate and more filler added so the smooth blend in from wing to tank was achieved.



Then the cut outs were made in the fuselage for the inner flaps were done with the edges lined in 1/32 ply as a seat for the flap, there is already a servo in the wing to drive the outer flap and a servo will be added inside the fuselage for the inner flap. I've purchased one of these newish WEATRONICS RECIEVERS which are a dual reciever, Powerbox voltage regulator and Matchbox all in one unit, this has the facility to drive up to eight servos from one channel though I will be using the flap channel to drive the four flap servos, mismatches in the linkage throw will be programmed out using the Weatronic Matchbox feature, I've been playing with this and this reciever is absolutley knockout.





Also done are the rudders and the elevator and aileron trim tabs.




The movable parts of the wings and tailplane will be tissue covered as I can't be doing with the glass/epoxy covering on such small difficult to handle items but I must admit I do like the glass/epoxy method. I've never tried this before and the finish is as good if not better than tissue/dope/sanding sealer. The wings and tail surfaces will be covered in paper cut to represent the metal panels as I find this gives a very real scale effect. The flush rivets are applied with a sharpened brass tuce which cuts into the paper but not the tissue or glass cloth underneath.


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #57 on: February 02, 2007, 23:10:54 PM »
Popped up to the Cosford Museum last Sunday to look and photo the Venom FB4 there, I have a set of close ups of a Venom FB50, the export version of the FB1 but needed the FB4 version. Great museum, last time I was at Cosford was back in 71 &72 as an RAF apprentice for the inter apprentice schools swimming and cricket matches, dos'nt change much !!!

Spent the last few sessions making up the flaps and airbrakes and also making the wing cut outs for the wheels and undercarriage doors.

Here are the two starboard flaps finished and hinged, the airbrake outboard of the flap has been removed, I had these airbrakes working on my first Venom but because of the wekness in the hinging system I never tried them in flight but they looked good taxying in deployed after a flight. This time round they are fixed, but need to be removable as the outer wing panel will not slide into place unless they are deployed or removed due to the angle of the wing tubes.



This is a view of the port wing with the flaps retracted and the air brake fitted. Also, the undercarriage doors are in place but as these are clear acetate they are'nt easily seen, great for lining up with the leg to drill out the holes for the mounting clamps though.



A couple more photos showing the outer and inner flap servos, the outer flap servo is in the wheel well whilst the inner flap servo is in the fuselage between the wing root and saddle tank.





( The last photo was taken with the model upside down on its cradle, I've just flipped the image round ! )


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #58 on: March 05, 2007, 22:27:19 PM »
A quick update on progress so far, the flaps were fitted and set up using the Weatronic programme on the laptop I have whilst plugged into the reciever so I could make the fine adjustments in situ. All four flaps now move equally throughout the travel range, each individual servo has its own "curve" which on the graph displayed by the PC looks the same, they must differ slightly though due to linkage and servo differences.

I have spent some time preparing the fuselage for painting, the fuz was manufactured without a gel coat as its epoxy not polyester so there were quite a few pin holes to fill, roughly about a weeks worth of filling, sanding, coat of primer to show if they'd been filled followed by the same process till I was satisfied. Then the panel line detail was scribed onto the fuselage and the panel lines marked onto the wing in preparation for the paper panels being applied.





Here is the underside before the paper panels are applied.



The first two panels glued on. A slight gap of approx 1/2mm is left between the panels to give "depth" to the lines, this is easy to do as the gap can be accurately done by gauging how much of the black marking line is visible, it disappears if the paper panels are pushed together.



And the underside finished on one side.

When the wings are completed they are given two coats of thinned sanding sealer and lightly rubbed down, then the rivets can be added with a sharpened brass tube which will cut through the paper but not the glass skin underneath.

I'm waiting on a delivery of rib tapes from Mick Reeves for the fuselage so I'll see how these pan out when applied.


IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #59 on: March 27, 2007, 17:18:17 PM »
Having got the airframe covered it was time to fit the boom fairings to the wing/fuselage, however, the top fairings are too short and are a b****r to fit even if they were the correct length, the underside ones are fine. See this photo.



Short by nearly two inches.

So I made up a mould to make my own in glass fibre, this is the start.



The initial base, the rest is filled in with balsa, shaped and then given a coat of epoxy resin and sanded smooth, then a mould cast off this.



And finally the finished boom fairing, this has not been trimmed to a final fit yet, that is the next task, then its onto detailing and painting.




IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline rcfanuk

  • Senior Administrator
  • Trade Count: (0)
  • *
  • Thank You
  • -Given: 14
  • -Receive: 75
  • Posts: 5,624
  • Liked: 66
  • Country: gb
  • No, the other up !!
Re: DH Venom
« Reply #60 on: March 27, 2007, 17:27:55 PM »
looking nice mate :af, shame you had to remake the fairing, how did they end up 2" short??

Steve
Global Moderator
Dawn Patrol UK

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #61 on: March 27, 2007, 18:14:42 PM »
Hi Steve

One of the errors in the design of the model, I have scale drawings and photos to base the changes on, that said its the only major error in the overall profile, the rest of the airframe is pretty accurate. I get the impression that the boom fairings were made after the prototype was built and were'nt taken from his model, just made "separate", nt the way to do things !

IB 
A womans mind is cleaner than a mans.
She changes it more often.

Offline rcfanuk

  • Senior Administrator
  • Trade Count: (0)
  • *
  • Thank You
  • -Given: 14
  • -Receive: 75
  • Posts: 5,624
  • Liked: 66
  • Country: gb
  • No, the other up !!
Re: DH Venom
« Reply #62 on: March 28, 2007, 09:51:21 AM »
Keep it up mate, love the Venom, what colour scheme are you going to use?

Steve
Global Moderator
Dawn Patrol UK

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #63 on: March 28, 2007, 21:32:34 PM »
Doing the same as my first one, the last Venom on operational RAF service, 28 Sqn, Kai Tak, Hong Kong 1960, WR539.
I have lots of documentation on this particular aircraft, the actual plane is in bits awaiting restoration at Salisbury Hall, I've offered to do it for them over the Easter weeknd as I've not much else on but I've not heard back from them

 :) :) :)

Theres a piccy of my first one in the scheme at the beginning of this thread.

IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline steve salmon

  • Trade Count: (0)
  • RCMF Flight Lieutenant
  • **
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 18
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #64 on: March 29, 2007, 09:15:19 AM »
Hi IB

have you done moulds for the fairings top & bottom. I have tried the ABS with the kit, not happy. Is it possible to purchase a set of epoxy fairings from you, the conformed tanks fitted beautifully

Steve

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #65 on: March 29, 2007, 09:36:42 AM »
Hi Steve

PM sent.

IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline cyclone

  • Trade Count: (0)
  • RCMF Squadron Leader
  • ***
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 117
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #66 on: March 29, 2007, 10:50:52 AM »
IB

I'm really enjoying and learning from your contribution here - thanks

Have you a target date and venue for flying this wonderful creation?

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #67 on: March 29, 2007, 11:55:12 AM »
Hi Cyclone

I'm aiming to get the model finished by July and thanks for the comments, much appreciated.

IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline Winchweight

  • Trade Count: (0)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 9
  • -Receive: 0
  • Posts: 2,628
  • Liked: 0
  • Country: gb
  • Ho, hummm..... anyone got a shovel & a bin bag?
Re: DH Venom
« Reply #68 on: March 29, 2007, 13:24:57 PM »
Be nice to see it in 28 sqn colours. Both Tigger and I served together on 28 Sqn until recently.
A400M GRIZZLY!.... er nope.  A400M ATLAS! .... er nope. A400M FATLASS! ....er nope. A400M AT LAST!

Offline lozza

  • Trade Count: (+1)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 1
  • -Receive: 10
  • Posts: 1,943
  • Liked: 92
  • Country: gb
Re: DH Venom
« Reply #69 on: March 29, 2007, 17:10:12 PM »
Ian thats coming on a treat looking very impressive

 :af  :af

lozza

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #70 on: March 29, 2007, 18:33:47 PM »
Thanks lozza.

Got the upper boom fairings in place, using glass fibre mouldings make for a much easier fit and knowing I took the side profile from my scale drawings and photos of the full size I know these are accurate to scale this time around, if not then I've only myself to rant at.

I've decided not to use the lower boom fairings as supplied so I've also made a mould to produce these as well, these will fit as accurately as the upper ones so whereas I've not been looking forward to constructing this part of the Venom its taken a niggle from my mind thats been concerning me since I started the build.

Heres the upper booms nailed on.





IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #71 on: March 31, 2007, 22:59:07 PM »
Underside Boom fairings done from my own moulds, a much better and easier fit.



Just a little trimming and filling to match the main booms, job done, now for a pint.

IB
A womans mind is cleaner than a mans.
She changes it more often.

Offline john330

  • Trade Count: (0)
  • RCMF Pilot Officer
  • *
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 6
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #72 on: April 03, 2007, 19:47:39 PM »
Hi Ian,
Been a long time!My Venom has about 25 flights on it since new and it has been a real joy.I replaced the M.R. retracts with air driven retracts and the nose strut has been replaced with one from Micheal Binder after snapping two of the Eurokit struts but other than that has been trouble free.I agree with changing the stab to 12 degrees,mine reqiured alot of nose up trim as well.I thought it might be the C.G. but I think now it is the stab incidence.Your new Venom looks fantastic.I love the new pod fairings and fuel tanks.My fuel system uses two of Grumania 1.6 litre tanks and an Intairco header tank and has been problem free.My PST 600 is the perfect engine for this aircraft and runs like a jewel.Keep up the good work and I can't wait to see the flight piccies,Cheers,John Vasil

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #73 on: April 03, 2007, 21:01:37 PM »
Hi John

Good to hear from you, where are you these days ? Far East or the Wild West ? (in relation to the UK).

I 'll have a look at the strut you mentioned, one never knows, I may have similar issues knowing my landings !

I'm just about at the painting stage, just one or two things left to do and also work out the canopy fixing as I have to have it removable to get to the innards of the beast. I've one or two ideas which I will share when I post the next build details. In the meantime I think I'll wag off work this Saturday and play with jets as we have a promising weather forecast over the holiday weekend  ::cc

Ian B
A womans mind is cleaner than a mans.
She changes it more often.

Offline john330

  • Trade Count: (0)
  • RCMF Pilot Officer
  • *
  • Thank You
  • -Given: 0
  • -Receive: 0
  • Posts: 6
  • Liked: 0
  • Country: gb
Re: DH Venom
« Reply #74 on: April 08, 2007, 08:06:46 AM »
Hi Ian,
Just replyed to your post,tried to add a photo and the whole thing disappeared into cyberspace.That was with Mac so I'll try Windows.I'm still here in Hong Kong(five more years).I do all my jet flying in Bangkok with the very nice guys from PST.I'm using the nose strut from Behotec#230120 and I'm hoping this will iron out some of the bumps.The first two struts broke in the same place,right where the holes are drilled for the steering so I think a machined strut with oil damping will help.My jet is looking a little beat up so I think this winter I will give it a bit of an overhaul with new paint,fix all the dings and add some scale details such as a cockpit.I'll take some picture next I'm In Bangkok.I'll try to post a picture of My Panther which has been a real joy as well.I,m currently working on Comparf Mig-15 which should be ready for the fall I hope.Next week I'm off to Toronto for some leave and a visit with the folks.I'm also going to Top Gun in Florida for a few days to help out with the Pst Team.Talk to you soon,Cheers,John

[ Attachment Invalid Or Does Not Exist ]

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #75 on: April 15, 2007, 19:32:46 PM »
Nice looking Panther John, I have a hankering for the Airworld Panther.................one day, you will be mine, oh yes ! (quote from Waynes World)

Decided after plodding on with adding surface detail to the rear tail booms to put the plane together outside and take a couple of pictures for the album.






Ian B
A womans mind is cleaner than a mans.
She changes it more often.

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #76 on: April 17, 2007, 12:23:19 PM »
To operate the twin rudders I'm repeating the method I used before and driving each rudder with its own servo and breaking all the rules by putting these in the bullet fairings at the rear of the tail booms. There is no other practical way of doing this and retaining positive slop free operation so I've used Hitec digital 5245MG servos being fairly lightweight and small enough to fit inside the bullet. I'm looking at church roofs with an evil eye !



And with the rear cover added no fouling of the push rod was tested, all OK.



Litho sheet strips have been added around the tail surfaces to replicate the full size and a little light weight filler used to feather these into the tail booms.





I'm looking at one or two methods for attaching the canopy, it has to be removable to gain access to the internals so this will occupy the next part of the build, ignore any bad language heard from this locality.

Ian B
A womans mind is cleaner than a mans.
She changes it more often.

Offline lozza

  • Trade Count: (+1)
  • RCMF Ace
  • ******
  • Thank You
  • -Given: 1
  • -Receive: 10
  • Posts: 1,943
  • Liked: 92
  • Country: gb
Re: DH Venom
« Reply #77 on: April 17, 2007, 15:10:26 PM »
thats looking better everyday  :af  :af  :af

lozza

Offline IB

  • Trade Count: (0)
  • RCMF Air Commodore
  • *****
  • Thank You
  • -Given: 7
  • -Receive: 4
  • Posts: 553
  • Liked: 5
  • Country: gb
  • Hmm, stick A to B and C
Re: DH Venom
« Reply #78 on: April 21, 2007, 00:08:06 AM »
The canopy was first masked off so I could size and mark it to fit.



When satisfied after the hacking.



I then glued shaped beech strips inside the fuselage and drilled and tapped holes and screwed in four 2.5mm bolts to act as guides for the canopy fixing.



Then made up the frame with slots in to engage the four bolts.



And finally after adjustments ( I built in vertical and horizontal slots to adjust for an accurate fit ) the canopy now drops onto the four bolts and then is pushed back locking it tight into place, no further fixing is required as the airflow will just try to push it back further thus holding it in place ( probably fall off when inverted knowing my luck _



Now the outer framing will be done and the bolts will be hidden after cutting back by the framing. The reason for the removable canopy is so I can install the gubbings necessary and the seat and pilot and have relatively easy access to service the internals.


Ian B
A womans mind is cleaner than a mans.
She changes it more often.

Offline rcfanuk

  • Senior Administrator
  • Trade Count: (0)
  • *
  • Thank You
  • -Given: 14
  • -Receive: 75
  • Posts: 5,624
  • Liked: 66
  • Country: gb
  • No, the other up !!
Re: DH Venom
« Reply #79 on: April 21, 2007, 15:23:36 PM »
Nice and simple Ian, i like it   :af

Steve
Global Moderator
Dawn Patrol UK


 

BloQcs design by Bloc
SMF 2.0.2 | SMF © 2011, Simple Machines
SMFAds for Free Forums
TinyPortal © 2005-2012
Page created in 0.96 seconds with 88 queries.