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Thoughts on a scale Sopwith Camel

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22 Dec 2020 08:14 #16 by paul d
Replied by paul d on topic Thoughts on a scale Sopwith Camel
That's not good! Think I would download a known accurate plan or drawing and use it to alter the kit.
balsa is best.

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22 Dec 2020 08:22 #17 by paul d
Replied by paul d on topic Thoughts on a scale Sopwith Camel
balsa is best.
Thanks: Klipkopwildlife

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22 Dec 2020 08:53 #18 by Eric
Replied by Eric on topic Thoughts on a scale Sopwith Camel
That last photo didn't 'work' - all I see is a wingtip and a bit of shed - in a 'letterbox' format.
if you are calm and collected when all about you are going berserk - you've missed something important!

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22 Dec 2020 08:56 #19 by paul d
Replied by paul d on topic Thoughts on a scale Sopwith Camel
just a screen shot Eric.
balsa is best.

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22 Dec 2020 10:06 #20 by Quorneng
Replied by Quorneng on topic Thoughts on a scale Sopwith Camel
The other thing, and not an uncommon problem in WW1 rotary engine types, is the huge prop!
If you do find a way of turning one of a scale diameter and given that models have to have a higher power to weight than full size then 'torque' becomes an even more serious issue than it was in full size.
Throw in a scale wing section with 'tricky' stall characteristics then opening the throttle close to the stall = ooops! :ohmy:

A longer nose, a Clark Y wing and a feeble looking prop may not be such a bad combination - unless you are a model masochist! ;)
Thanks: Klipkopwildlife, crash happy

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22 Dec 2020 11:05 - 22 Dec 2020 11:11 #21 by Klipkopwildlife
Replied by Klipkopwildlife on topic Thoughts on a scale Sopwith Camel
I'm certainly going to cheat and use the supplied airfoil section, here's a funny.

A 6 to 7lb model needs a 15 to 20cc engine?
The larger quoted motor will give about 800watts at full chat with the correct propeller, I see that as being in the 40 size glow motor range.
The smaller motor is quoted as about 315watts which I see as being dangerously low for this size of model!
Do it now, you may never get another chance
Last edit: 22 Dec 2020 11:11 by Klipkopwildlife. Reason: Sentence added
Thanks: Eric, crash happy

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22 Dec 2020 12:08 #22 by supertigrefan
Replied by supertigrefan on topic Thoughts on a scale Sopwith Camel
It's the long cowl that makes it look naff, that's the problem with the Camel it has such a short nose that making a model that comes close to acceptable in looks makes the CoG a problem
Is it possible to use a stability control to overcome or mitigate this?
Stay low, Move fast, Trust no-one....
Thanks: Klipkopwildlife

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22 Dec 2020 14:46 #23 by paul d
Replied by paul d on topic Thoughts on a scale Sopwith Camel
Most scale jobs have a static display prop and a flying prop.
Think it's going to need a bit of thinking about Klippy with regards to the weight, you could scrap everything aft of the cockpit and build it using small section spruce longerons and a tail with laminated or steamed strips...Interesting project, what engine do you propose to use?
balsa is best.

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22 Dec 2020 16:29 #24 by Eric
Replied by Eric on topic Thoughts on a scale Sopwith Camel
Make the cowl from 1/2" armour plate!
You might have a bit of trouble bending it, though! :evil:
if you are calm and collected when all about you are going berserk - you've missed something important!
Thanks: Klipkopwildlife

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22 Dec 2020 17:23 #25 by Klipkopwildlife
Replied by Klipkopwildlife on topic Thoughts on a scale Sopwith Camel

supertigrefan wrote: It's the long cowl that makes it look naff, that's the problem with the Camel it has such a short nose that making a model that comes close to acceptable in looks makes the CoG a problem
Is it possible to use a stability control to overcome or mitigate this?

I'm sure a stability control will do the trick, along with very small throws at the tail. As the CoG moves back less and less throw is required. Many Multiplex models are quite happy with the CoG at 50%, also, correct me if I'm wrong, Free Blighter models also have their CoG very far back.
Do it now, you may never get another chance

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22 Dec 2020 18:22 #26 by paul d
Replied by paul d on topic Thoughts on a scale Sopwith Camel
correct Klippy, my Bantam CoG is around 60% and needs very little elevator, same with the just junior, the elevators are tiny but surprisingly powerful, the rule with converted vintage models is very little elevator but loads of rudder..."free blighter"...love it!! :)
balsa is best.
Thanks: Klipkopwildlife

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23 Dec 2020 10:51 #27 by Klipkopwildlife
Replied by Klipkopwildlife on topic Thoughts on a scale Sopwith Camel
I want to use this Wankel that I bought from Phil Claridge. The equivalent Thunder Tiger is there for comparison.

I'm sure that rear adapter plate will come off and I can mount it direct to the fire wall.
Do it now, you may never get another chance
Thanks: crash happy

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23 Dec 2020 11:59 #28 by Quorneng
Replied by Quorneng on topic Thoughts on a scale Sopwith Camel
You have a Wankel!
Certainly small and compact.
I know! You could make a 'ring' silencer that formed part of the cowling. Its weight would certainly be well forward! ;)
Thanks: Klipkopwildlife

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23 Dec 2020 12:30 #29 by Klipkopwildlife
Replied by Klipkopwildlife on topic Thoughts on a scale Sopwith Camel
I'm hoping it'll have enough power for a 7lb model although I'm going to try for 6! I spent enough time being ultra competitive when I was sailing catamarans at national level, now I just want to have fun. I'll certainly look at a ring silencer, not that it's all that necessary, noise is not a problem here, although the weight might be useful.
Do it now, you may never get another chance

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23 Dec 2020 12:48 #30 by supertigrefan
Replied by supertigrefan on topic Thoughts on a scale Sopwith Camel
Would adding some incidence or airfoil to the tail to add lift help relieve the rearward CoG?
Stay low, Move fast, Trust no-one....
Thanks: Klipkopwildlife

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