Topic: DB Hurricane build

When the fairings are on it is incredible how rigid they are



And when the tape packers are removed, a nicely fitting fairing is the result.
Ian.

Here the front block is in place, looks like a big bit of tree for the small bit that will be left after shaping!!





Still haven't shaped the leading edge yet either, apart from the centre section, needed to for wing seat. Guarantee I wont ding the unshaped L/E either, until the second I shape it that is!!

The wing mounting bolts will be hidden under a scale panel, removed by a spring pin inside the radiator outlet, simply pull the pin and the panel pulls off, will also help to keep the wing bolts with the plane at all times, not that we forget things like that do we?!



You will notice the lovely job I have made of trimming the ABS radiator





Fairings are mostly done now, nearly stringer time, will start to look like a Hurricane then!

Ian.

Seems to have taken ages to do the bolt cover, but here it is. WOW WEE!!
 
Hardly seems worth the effort, but it is done now, boys and gimmicks huh?





Ian.

Elevator linkage has been sorted. It was important to keep it all internal, keep it light, slop free and completely serviceable.

It comprises of two of these, with closed loop cables for the main run, with short, straight 3mm rods and links at each end.
The belcranks were cut from paxolin sheet, and are doubled up, to surround the Kavan H/Duty Ball links to stop any chance of the ball twisting the belcrank, a problem with the ball just being mounted to one side of the crank, horn etc. The Kavan links are superb as they also have a 3mm hole in the ball, plus a shoulder on each side of the ball so they can be bolted tight both sides without fouling the link.



At each end is a lite ply mount, brass bushed, to mount the belcranks to. This also supprts both sides of the crank, again to stop any twisting, but remaining very light. The mount at the rear end is drilled to allow the removal of the cranks if neccesary, (not easy unless you are a gyne  gaene , someone that fiddles with lady parts!





At the front end is a 3mm rod, with a clevis to the servo end, and the rear end uses a H/Duty bolted clevis. All bolts have nylock nuts.

A point worth noting here is that this system only works properly at this size using doubled cranks and good ball links. If using clevises throughout, no matter how good the holes are, the clevis' always seem to introduce unwanted play, which will get worse.

The rudder link will be the same sort of thing, although being a control that is only used on the ground  , a single crank will do.

Ian.

X marks the spot!




This is where the rudder crank is to go, again made in paxolin, only a single. Both will be closed loop controlled.The steering cables to the tailwheel will be the furthest apart, making for manouverable taxiing, with the rudder cables the furthest in and the drive from the servo in between, therefore making the most of the servo travel. Also in the steering cable line, springs will be incorporated to save on jarring the servo. Done this for years on tailwheel links and it works well for me

Also, the motor destined for use in the Hurricane is a Revolution 52 petrol, after an age of searching for a suitable motor that didn't stick out too much, the choices were narrowed down to that or the Quadra 42. After reading of Greys exploits with his Hurricane and the Quadra, decided on the bigger of the two. By some misunderstanding and misfortune, this is what has arrived!

Missing an R and gaining 6cc, may I introduce the Evolution 58 :-[



As can be seen, not the motor for this plane :-[

Cracking motor though, just too much of it !

Ian.

Hi Ian,

The Hurri looks superb, mate, really does

Cheers,
Neil

The rudder link will be the same sort of thing, although being a control that is only used on the ground  , a single crank will do.

Ian.

 ...............I don't know............really.

That evo 58 looks a bit of a monster...............but regarding the Revolution 52, whats the news on these, they 'look' spot on, but what are the running reports like...............I've yet to hear anything of them ?

Phil

Seen a couple of them in use, no problems, but have seen one that was a orrible, noisy thing. That was the standard exhaust, I'll be making one to fit the cowl. The guy that had problems did seem to be having problems with everything though, nowt was his fault of course!  You just get some people that fiddle. Saw him tune the petrol motor every flight, about 3/4 of a turn at a time!

Ian.

Saw him tune the petrol motor every flight, about 3/4 of a turn at a time!

Ian.

OH DEAR  :-[..................

Blimey, Ian, what a lovely job you're making of this.  I certainly won't let you look inside the Starlet before you test fly it for me if you're expecting it to look like the Hurricane    Actually, I thought I was making a reasonably neat job until I look at these pics  :(

Geoff

Hi Ian,
         doing a great job on the Hurricane,I like the tip on useing paxolin with the ball links.
All the best Keith.

Hi guys

Aren`t these motors made by MVVS, along with the new Graupner petrol jobbies? They certainly bear a striking resemblance to the MVVs`s.

I think these are basically the same motors as those MVVS jobs, but it is physically just too big for this application. :-[

Here is the rudder belcrank set up, decided to double it up as well. Needed some jiggling to get it in a position so that the linkage worked well and the cables didn't rub on anything in their travel.



The servo saver springs are visible at the front end of the cables. This set up gives 50 degrees of tailwheel steering each way, with the rudder moving 30 degrees each way.





Started with the stringers, not a job I was particularly looking forward too, as they are pain in the ass to position correctly. The shaping formers don't have any notches in them to help, so its out with the scale drawings and a calculator

The parallel side stringers are first to go on, as they have good start and finish points to use as reference.





Will get the other side on later, then the top decking, but I will leave the bottom open til the tailplane is covered and nailed on, then complete the stringers, (can I not just finish ONE bit!!!?)

Ian.

Looking fantastic mate
Definatley one I am following with interest 
I like the spring servo saver idea , one that will come in handy on future builds

Shane

Nice build Ian, where did you get the springs from?

Steve

Nice build Ian, where did you get the springs from?

Steve

I don't know where Ian got his, but I bought a mixed bag from a trader at a show a few years ago.  It may have been Nexus, or one of the tool stalls.  I bought a couple of boxes of 'O' rings this year for very little money.  It's always worthwhile to keep an eye out for oddments like that, which are cheap, but difficult to find.

Geoff

Steve, the springs were from Proops, years ago, good quality springs. If you fit them, it is wise to cut the ends off, as they only consist of a single coil to connect the cables to. Make new ends using two coils, makes a much more secure fixing.

Man are these stringers a pain in the backside. You have to be very selective with the stringers, some too soft, some cross grain, dont even be tempted to use them, they are fragile enough as it is!!



I had to strip up some more as there were lots of softies.



It seems to have taken ages to fit 3/4 of them, but the rest should be quite quick, as they are all marked now for position. It was harder to draw the positions correctly than to cut and fit the things!



Looking much more like a Hurricane now!

Ian.

http://www.proopsbrothers.com/acatalog/Online_Catalogue_Gears_Pulleys__Wheels___Springs_65.html


Looks superb Ian!

VERY nice ian...............lovely job.

I'm with Ian on the spring's in the tail wheel lines.................I've done the same on all my tail dragger fighters..............works a treat, just make sure the springs are stiff enough so you still get 'some' movement with the weight of the model on the tailwheel..............

Phil

looking great Ian......i know how much works involved doing that..having built the BT hurri......just sit back and enjoy it.....shame it's all going to be covered :(

keep it coming!!

all the best

dave

Hi Ian,

Beautiful job, mate. Gotta agree with Dave, shame to cover up all that fine work

Cheers,
Neil

Really excellent work....... old tree hugger     

great work

colin

Cheers chaps, waiting for the motor at the moment, but can get on with covering the rear end and the tail surfaces. The motor is a Revolution 52 cc petrol, rear carb, rear exhaust, nearest thing to fitting completely in the cowl.

Ian.

Hi Ian, I've tried several model shops to try and get the large ball links with the shoulders , that you mention when making your bell cranks, but none are able to supply. Any pointers as to where I can purchase these items.
Many thanks
     
              Keith

Kavan make them, ball with shoulder, and black GFN link for M3 thread....................but I had to find a shop willing to order them in special as they normally only keep the standard ones...............

109F,
        Try www.kavanrc.com it looks like they do mail order.

John,
It's the semi-colon at the end of the address that is causing the dead link.
Steve

Thanks DW. Sorted.

Hi All,

Try Stu Mackay, he used to sell the large ball link connectors.

TTFN,
Neil

Found the Kavan site, thanks for your help.
     Keith

Keith, Kavan are available off the shelf at North West Model Supplies, also, Protech do some nice ones too, although they are usually only available to order. I ordered some from Ajay Models, arrived very promptly. Hope this helps, although several speedy fingered types have been there first!!

Ian.

Thanks Ian, I made a call to Ajays' , they've got to be ordered, he should have them in a week or so.
At least I'll know where to get them from in future.

  Cheers
           Keith             
 

Not much to report here, still waiting on the motor and clearing building board space again

Although, I did obtain a fantastic set of scale retracts for the DB Hurricane, sadly too late to be retro fitted to this one, so I'll just have to build another now!!

Talking in the chatroom last night, Tiger wanted to see some pics, so, ever obliging, here they are.

1. Fully extended


They were made by John Goodwin, and include the scale rear leg, leg lift actuators and even the air ram is in the scale place, although slightly bigger than scale. The leg is pulled back into the well by the twisting and folding rear strut, so the wheel lies flat in the well, therefore the doors are pointing in the right direction when the wheel is down. Due to the numerous angle changes involved, there are a number of twisting links to keep all of the linkages free running.

2.Partially retracted



3.Fully retracted


Ian.

Wow,

They are a work of art.........something to aim for......Thanks Ian

I right clicked, hope you don't mind

Cheers buddy

Andy

 Ian,
 Those retracts are something else!...really look the part....and very strong looking as well!

   Cliff

the only trouble with them-and i told ian this, is that they are very very built in, damage them and the entire wing is gone, (ask me how i know )

  a way has to be found to get them out,  they are very much part of the primary build of the wing,      nice though,  john also did a set of retracts for the db spitfire, of which i have a set, they are v nice too!

wonder if he is still around?  went to his house in notts once, with glen masters,  he had a workshop built on, with all the machines you could ever want,    really nice guy

Alan, it is a simple job to make them removeable for servicing, stop you worrying man!

The only thing I might do is drive them with a MR Super Servo, instead of the air up air down and the consequences of them running out of puff :-[

Ian.

easy to remove?   have a good look at that instalation,  its buried in the wing--how the hell do you get them out?  the metal bits go though the wood bits!!