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Flying Models Topics related to flying WWI aircraft models

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Old 3 July 2005, 06:34 PM   #1
Scout Pilot
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Cox radial engine conversions

A company called Widecanyon ( is offering five-cylinder radial engine conversions of three types of Cox .049 glow engines. I hasten to add that while all five cylinders are Cox products, one is operating and the other four are dummies. These engines might be useful for those building flying models of WWI radial- or rotary-powered planes.

According to the June 2005 issue of Model Aviation, Widecanyon is planning similar conversions of Cox .020 engines and is considering similar conversions in other configurations, including in-line. If marketed, the in-lines might be useful for models of such WWI planes as the BE2, DH-6, DH-9, and, of course, numerous Albatros, Pfalz, and other German designs.
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Old 6 July 2005, 05:04 AM   #2
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??????????????? Why?

Just mock one up yourself for less then 200 bucks!

Cool thought.
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Old 15 July 2005, 07:21 PM   #3
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Forgive me if I'm missing something, but why would you want the weight of four unproductive cylenders? Why not just model the additional cylenders out of balsa, ply or even plastic? Since I'm new to RC, could someone please tell me if there's something I'm not grasping here.

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Old 15 July 2005, 08:23 PM   #4
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Typical WW1 types do require a lot of nose weight to balance. It does seem to be a bit much though (possibly). From a detail stand point, a real cylinder (functional or no) is going to look a lot better than anything I could fabricate.
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Old 18 July 2005, 11:40 AM   #5
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is it possible to make the " dummy " cyl live? maybe offset each of the four the thickness of the con rod.....

if this can be done, why not 7 or 9 cyl radial?
Old 19 July 2005, 10:34 AM   #6
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Let me begin by stating that I have no personal interest in the Cox engine mod because I prefer to work at 1/6 to 1/4 scale, generally inappropriate for an .049 powerplant. Moreover, I would be reluctant to use a 2-cycle engine in any WW1 warbird.

That said, there is one potential problem with the Cox mod for those whose tastes are different. Most of the aircraft that would be suitable for the dummy radial/rotary are partially or fully cowled. Use of the dummy engine dictates the minimum size of the cowl, and establishes the model scale, most likely somewhat different from any plans available for scratch building. Fully cowled installations tend to require larger prop sizes, which might lead to a requirement to gear drive an engine in the .049 class.

On the bright side, most of the uncowled WW1 engine installations are pushers, where the ability of Cox engines to run in either direction could be helpful.
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Old 19 July 2005, 07:44 PM   #7
Herr Kessler
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Originally Posted by Lucky Dog
Typical WW1 types do require a lot of nose weight to balance. It does seem to be a bit much though (possibly). From a detail stand point, a real cylinder (functional or no) is going to look a lot better than anything I could fabricate.
I forgot about the notorious tail-heaviness of GW aircraft. I'm still working up to building one, let alone flying one. Hopefully soon though. Anyway, I can see your reasoning for your first point. It does, at least, make some sense. Thanks for pointing it out to me.

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