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Author Topic: Jamara Gee Bee Z pics of build  (Read 25482 times)

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Offline pubquiz

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Re: Jamara Gee Bee Z pics of build
« Reply #40 on: January 19, 2011, 14:28:57 PM »
I built up the spats and glued each half of them (each half being made up of 3 balsa laminations so 6 in all for each spat) temporarily together with just 3 spots of cyano to hold them together while I carved/sanded them to rough shape as this is easier to do while they are off the wing.

I then split them back in half and carved out slots in them to clear the wires and epoxied in place on the wing using plenty of epoxy in the slots.

You will notice I have added a thin (1mm) piece of liteply for the full inner area of the spat and also an additional vertical piece of liteply on top of this.

This will give support to the wheel mounting bolt (axle)


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Re: Jamara Gee Bee Z pics of build
« Reply #41 on: January 19, 2011, 15:45:59 PM »
This is a pic of the ply strengthening piece FV that covers the wing mounting  bolt holes giving a harder surface for the head of the bolts to butt up to.

I forgot to add this before I sheeted the bottom fairing so ,as you can see in the pic, I have now had to cut a piece out of the fairing sheeting to fit it through, I will fill the gap in later and just have 2 access holes for the screws or just make a smaller rectangular hatch......So don't forget to fit ply piece FV  BEFORE sheeting the bottom fairing.

Tom

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Re: Jamara Gee Bee Z pics of build
« Reply #42 on: January 19, 2011, 19:32:45 PM »
Greg

What does yours weigh?

In the instructions it says 'ready to fly' weight is 720g!

However I have just piled all the bits on the kitchen scales ...ie the whole airframe the motor,lipo,Rx pack,Rx, servos etc and it comes to bang on 1KG...this is without covering and final assembly!

I don't think I have particularly built it heavy ...have only used the stock wood etc and the radio gear is all micro stuff

I have decided to use a seperate Rx battery instead of BEC but it is only a small AAA size Eneloop pack.

Any other builders visiting this thread...I would be very interested to hear what weights yours are.

Tom


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Re: Jamara Gee Bee Z pics of build
« Reply #43 on: January 19, 2011, 19:51:07 PM »
Hi Tom,

My dummy radial is just a photo as well, I managed to find a reasonable front on shot of the wasp junior which is the actual engine used in the full size. However in the photo the engine was on a stand so I had to use Gimp to edit it a little (I've probably still got the file if you don't find a better solution). I then simply printed it on photo paper before glueing to a balsa former. It's not ideal and I may make something a little more 3D in the future.

Mine still hasn't flown yet though they fly surprisingly well according to the RCM&E review.

Don't have a clue where Jamara got that all-up weight but it's about as accurate as the rest of the documentation, mine is about 1100g and I think the RCM&E review model was heavier still which re-assured me somewhat. I like you was starting to sweat it a little as the ounces piled on but RCM&E's flies very well so we should have no worries.

All the best,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #44 on: January 19, 2011, 20:00:54 PM »
Hi Greg

Thanks for the reply....that's good to hear re the weight  :co

Will prob do the same thing re the pic of the engine as it looks fine

Yes if you do find the pic file it would be great....would save me looking for a pic on the net etc.

Let me know if you do and I'll send you my email address

Cheers

Tom


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Re: Jamara Gee Bee Z pics of build
« Reply #45 on: January 19, 2011, 20:05:10 PM »
Yep found it. Tried to attach it to a PM but couldn't suss it out so bung me your e-mail address and i'll send it over.

Cheers,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #46 on: January 19, 2011, 20:19:17 PM »
Hi Gregg

That's great :)

My Email is pubquiz50 'at' o2.co.uk ...replace the 'at' of course with an @

Cheers

Tom

P.S.Looked at your location on the map in your profile and it's an airfield...are you in the RAF?

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Re: Jamara Gee Bee Z pics of build
« Reply #47 on: January 19, 2011, 20:33:22 PM »
E-mail sent,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #48 on: January 28, 2011, 21:47:22 PM »
HI Tom,

Any progress on the Gee-Bee, haven't heard from you in a while?

Greg.


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Re: Jamara Gee Bee Z pics of build
« Reply #49 on: January 28, 2011, 22:21:25 PM »
Hi Greg

Yes still on with it slowly.

Bit of a lull at the mo as I have been waiting for the model shop to get an order of yellow pro film in.

Have sprayed inside cowl black and covered it in black profilm and it's looking ok.

Printed the engine picture you sent me(thanks again for that) and it will look much better than an open cowl

Have taken some more pics and started on the aileron servo installation, will upload them in a batch in the net week.

So havn't given up and the thread will end in completion of the model :)

Tom


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Re: Jamara Gee Bee Z pics of build
« Reply #50 on: January 29, 2011, 21:24:57 PM »
Hi Tom,

Glad to hear you're still at it!

How did you find covering the front edge of the cowl with the profilm? My hands ached for about a week from stretching it around there but it went round ok with patience!

Glad to hear you like the pic, not an ideal solution is it but it does fill that bl**dy great hole!!

Best wishes and good luck with the rest of the build,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #51 on: February 06, 2011, 13:13:01 PM »
Just thought I'd post some more pics.

Yes Greg the cowl did take ages but quite pleased with the result...pro film is expensive but much prefer it to solarfilm...love the way it doesn't leave it's pigment on the wood so is great for repositioning etc :)

I have covered the fus in yellow pro film and the cowl in black so far

Am going to start covering the wings this afternoon.

Am wondering what the best way of adding the numbers and letters and wing scallops is?

Will probably just have to cut them out of black profilm individually so a 100% scale template would be great, if anyone knows a site to download one :)

Reading up on some other threads I know there are companies that will do a set of stickers to order but they are not cheap.

Anyway will take some more pics soon of the aileron servo mounts and finished wheel pants etc but here are just 4 pics of it temporarily assembled before covering.

Tom
« Last Edit: February 06, 2011, 13:23:37 PM by pubquiz »

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Re: Jamara Gee Bee Z pics of build
« Reply #52 on: February 06, 2011, 13:17:29 PM »
2 more pics... I don't know why but the 'more attachments' link disappears after attaching the 2nd pic even though 5 pics are allowed per post ???

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Re: Jamara Gee Bee Z pics of build
« Reply #53 on: February 06, 2011, 18:17:05 PM »
Here is a pic of a support I epoxied in to mount the wing servos (one for each aileron) the servo is not yet permanently mounted ......it will be stuck in with some VERY strong double sided tape I have.

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Re: Jamara Gee Bee Z pics of build
« Reply #54 on: February 06, 2011, 18:29:20 PM »
Here are 2 close ups of the wheel spat. Some final sanding yet to be done.

One mistake I made was when I was carving/sanding the spats I was holding the wing level....ie parallel with the floor to check I had enough 'up' chamfer at the back of the spat to clear the ground ......BUT of course the Geebee is a tail dragger so the wing is NOT parrallel with the ground when the aircraft is sat on it's undercarriage ...DOH!

So when I attached the wing to the fus and sat the plane down the rear of the spat was contacting the ground  :banghead:

So I then had to cut a chunk off and redo the spat.

Make sure you hold the wing at the correct angle when carving ::)

Covered the bottom of the wings today ...will post some pics when fully covered and installing gear

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Re: Jamara Gee Bee Z pics of build
« Reply #55 on: February 08, 2011, 19:46:18 PM »
At last an English GeeBee build forum.

I wish I had found this 3 months ago, it would have saved me an awful lot of head scratching.

Apart from a couple of ARTF's this is my first "kit build", probably not the best choice but it's been a lot of fun (so far).

My kit was from BalsaWorx Germany, it had quite a few parts missing so I had to fabricate these myself, not so simple when there are no plans to speak of.

I have made a couple of changes to the under carriage fixing and have glassed the cowling, spats and hatch I was worried that the weight was creeping up so I was pleased to see that my total weight less covering of just shy of 1kg was similar to others.

Has anybody got a tried and tested C of G position ?, I emailed Jamara and they said start at 48mm behind the leading edge and work back after flight testing, the "instructions" say 53mm.

I am currently fitting control linkages etc, then I have the covering to do so not expecting to be flying for a while, looking forward to hearing about some flight testing reports.

Regards Steve.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #56 on: February 08, 2011, 19:54:31 PM »
Hi Steve

Yes I will be starting on the radio installation soon....got most of the covering done....some wringles but then I am not the best coverer ;)

Luckily all the bits were in my kit but yes as I say in an early post this is not a great intro to kit building.

Interesting that re the CG

Feel free to post any pics

Tom



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Re: Jamara Gee Bee Z pics of build
« Reply #57 on: February 08, 2011, 20:05:01 PM »
Attached picture of trial fit.ila_rendered
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #58 on: February 08, 2011, 22:04:53 PM »
Wow that looks great Steve, Could I ask where you got that dummy radial? Tom and myself are currently stuck with a photo of the wasp junior for something to fill that big hole in the front of the cowl (photos of mine previously in thread). I've never really been happy with it but as it was a hack I didn't go to the effort of finding something better. However, now someone has come along with a ready made solution!!  ;)

Nice work, the cowl and spats look great glassed!

All the best,

Greg.
« Last Edit: February 08, 2011, 22:06:39 PM by Greg_S »

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Re: Jamara Gee Bee Z pics of build
« Reply #59 on: February 09, 2011, 19:03:01 PM »
The dummy radial engine came from America. http://www.darehobby.com  (accessories-radial engines-item No. 1028-16)

It was a simple PayPal transaction that cost just under 9 including postage and took about a week to arrive.

Regards Steve.

ps/ Tom it seems we share another common interest, full size gliding.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #60 on: February 09, 2011, 19:19:54 PM »
Hi Steve

Oh yes just noticed your avatar   :co

I havn't gone solo in a glider yet ....been at it for years but too many hobbies and not enough time  ;D

Bit annoying though how many launches I have had (lost count and it's been years!) and still not soloed ...though all flights seem to go fine.

Especially as I went solo in a Cessna  in 1984 in 12 hours and got my (now lapsed)  PPL in 6 months!

Still I enjoy the days at the club though doing all the other stuff like tractor driving etc :)

As you will know it's a full day job not just arrive and fly ;)

You been doing it long?

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Re: Jamara Gee Bee Z pics of build
« Reply #61 on: February 09, 2011, 19:30:17 PM »
Tom

Just getting the hang of gliding now, after 20 years and 1000 hours, currently flying Discus turbo and Grob 109B motor glider.

And yes I agree it certainly does eat up the time.

Steve.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #62 on: February 14, 2011, 20:04:20 PM »
Some progress this weekend.

Aileron servos installed, and canopy fitted.

To make the canopy look a bit neater I wanted to fit it from the inside, this would prove difficult so I fitted it to a frame which will be glued into the fuselage, I was quite pleased with the result but it was a lot of work.

Pictures attached showing the canopy, servo installation and wheel spat fixing.

The wheel spats have a 2mm ply in between the balsa laminations with 2mm wires set into them, I fitted beech bearers between the wing ribs and have a ply cover plate screwed over to hold it all in place.ila_renderedila_rendered
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #63 on: February 14, 2011, 20:05:59 PM »
Two pics dropped of the previous message so here they are :-ila_renderedila_rendered
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Re: Jamara Gee Bee Z pics of build
« Reply #64 on: February 14, 2011, 20:37:36 PM »
Looking good Steve...looks a much neater build job than mine  :af

Been a bit busy on other things this past week but will post some pics soon.

Tom

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Re: Jamara Gee Bee Z pics of build
« Reply #65 on: February 25, 2011, 21:21:50 PM »
I was debating as to whether I would need to cut some vent holes in the underside of the rear fuselage to prevent the fuselage from "inflating" and either popping the hatch off in flight or lifting the covering, I saw an in flight picture of the underside of a GeeBee on the German forum with a hole cut so that made my mind up and I've added some trimming to support the cut edges of film.

I have an ARTF Extra of similar construction and that's got vents and given the GeeBee fuselage has the dynamics of a traffic cone traveling base first its seems like a good idea.

Actually I think I'm just finding reasons to put off doing the covering which I'm not really looking forward to.ila_rendered
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #66 on: February 25, 2011, 21:35:40 PM »
Steve,

I must admit I put off the covering job on mine for as long as possible!! Not too bad when you get going, though the compound curves at the rear of the fuzz do make life interesting!! Oh and belated thanks for that info on your dummy radial, I'll be getting one for my machine soon.

Both of your aircraft are looking superb fellas, keep at it!!

All the best,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #67 on: March 06, 2011, 13:08:02 PM »
Finally bit the bullet and started the covering.

Greg, you were not joking about the fuselage compound curves, you may have heard me cursing and I think I invented at least 3 new swear words.

End result not too bad, just the wings left to finish, hopefully they will not be so difficult.

ila_rendered
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #68 on: March 10, 2011, 12:48:37 PM »
looking at the number of views on this thread it appears to be quite popular.

Are there more Gee Bee builders out there, or is it just the usual air of morbid curiosity that seems to surround Gee Bee's ?
« Last Edit: March 10, 2011, 13:32:57 PM by S57 »
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #69 on: March 14, 2011, 19:09:13 PM »
Got the wing covered this weekend, this solarfilm sure is tricky stuff.

This was supposed to be a winter project but it's become a winter /spring project now and is starting to interfere with flying (model and full size), missed a good day on Sunday.

Really must get a move on.

What progress are others making and more importantly has anyone got their GeeBee flying yet ?
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #70 on: March 30, 2011, 20:17:04 PM »
Just the ailerons to cover, some painting and a bit of trim and we're done.

The covering has been an "experience" maybe I should have tried a slab sided plank wing as a first covering job.

Couple of pics attached showing progress to date.

Anybody else getting close to flying yet ?
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #71 on: April 03, 2011, 19:13:58 PM »
Anybody else getting close to flying yet ?

Mine was maidened today!! Flies absolutely beautifully!! It was a little too windy for her really but she handled really well despite being very light and I even managed to land without mishap, though it was a horrible looking affair!!

Trouble was that slowing for landing meant she was almost hovering in the wind, with a tendency to drop a wing if slowed any more, but applying throttle meant she would climb. Ended up just sort of flopping it down but hey, she's in one piece!!

Steve yours is looking really good by the way, and don't worry she'll fly well too.

Tom any progress?

Cheers all,

Greg.

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Re: Jamara Gee Bee Z pics of build
« Reply #72 on: April 05, 2011, 12:40:24 PM »
Greg

Congratulations on your successful maiden, sounds as if the last bit was a bit hairy.

At what position did you have the C of G ?

what size (capacity ) battery were you using and what was the flight time ?

What was your final AUW ?

Steve.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #73 on: April 05, 2011, 16:23:29 PM »
Hi Steve,

Yes it was hairy!! Shouldn't really have flown as it was obviously too gusty, but then again she came down in one piece!!

Battery was an Overlander 2200mAh running the recommended motor/esc setup. Flight time was around four minutes(I forgot to start my timer in all the excitement!) but when I got home and charged the battery it only took 1010mA so it'll prob do eight to ten minutes without probs. Though of course that is with conservative use of the throttle.

C of G is at the recommended 53mm behind the L/E (right on the mainspar as you'd expect) and I achieved this easily without adding any weight so it turns out that it really is a good design even if it can be a pig to build!!

AUW for mine is about 1140g so Jamara's figure of 720g is a bit optimistic (I seem to remember the RCM&E review model was heavier still so it's not just me!!) though it really does fly nicely so I think the extra weight is probably a blessing, particularly with a bit of wind!!

Did get some video though I don't want to hijack Toms thread too much by embedding it. Just go to you tube and search 'Jamara Gee Bee Z Maiden Flight' and you'll find it. If you do have a watch do bear in mind that it was REALLY windy and not dodgy piloting  :'' I blame the wind for the dodgy taxying before takeoff as well!!

All the best,

Greg


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Re: Jamara Gee Bee Z pics of build
« Reply #74 on: April 05, 2011, 19:09:45 PM »
Greg

Thanks for the info, I have the same battery and setup so I am expecting the AUW to be similar.

Looking at the take off roll it doesn't appear to be short on power so that's good.

looked at the video I will be very pleased if mine performs as well as yours.

Hoping to get mine flying soon, but I think I'll be waiting for a nice calm day to keep things just a little less exciting.

Steve.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #75 on: April 09, 2011, 20:33:43 PM »

Hoping to get mine flying soon, but I think I'll be waiting for a nice calm day to keep things just a little less exciting.

Steve.

Good move!! Flew mine again last night, totally different kettle of fish. Really does fly nicely, just don't expect to have any rudder authority after touchdown!! there's another vid on youtube if you fancy a look.

Cheers Steve,

Greg.

P.S any news on your's yet Tom?

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Re: Jamara Gee Bee Z pics of build
« Reply #76 on: April 11, 2011, 12:54:01 PM »
Greg

Looked at the video of your second flight second flight, looks really good, it's nice to see something a Little different, must make some effort to get mine completed  but seem to have too many projects at the moment.

Steve.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #77 on: May 28, 2011, 17:30:00 PM »
Some more progress, need to fit wheels, tail skid, a bit more trim and finish the radio installation but I think I'm getting close.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #78 on: July 16, 2011, 16:16:10 PM »
Well another wet and windy Saturday has not gone to waste, I have finally finished the GeeBee.
The winter project stretched into a spring and summer project.

Maybe a rather ambitious subject for a first build, with quite a few new techniques to attempt along the way, but I am pleased with the end result.

Not had much chance to fly models this year so need to get a bit of practice in before I maiden this one.

Tom any progress?

Greg I've seen your fabulous Green Finch so I guess the GeeBee has been pushed to the back of the hangar.
Indecision - the key to flexibility

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Re: Jamara Gee Bee Z pics of build
« Reply #79 on: July 25, 2011, 12:54:37 PM »
That looks awesome! Look forward to a flight report!  :co


 

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