Wright Stuff C

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Re: Wright Stuff C

Post by bjt4888 » March 14th, 2020, 8:39 am

Xiangyu,

Motor stick wood from the FF kits is probably not usable for Penny Plane. Most of the motor stick wood in the FF kits we received was 4 - 4.5 lb cu ft (very light and soft) and is too flexible for motor sticks until the 3k carbon tow is applied. As carbon tow on motor sticks is not allowed in Penny Plane, you'll need higher density wood for the motor sticks.

Also, the .039" carbon rod wing spar material in the FF kit, while fine for 8.0 gram SO airplanes, is too heavy for Penny Plane. You wont be able to build the Carbon Penny wing to the 0.8 g target unless you use the .015"x.038" carbon strip recommended (or, in the past, Bill G. used two stacked .020" rods, for wing spars, but the strip wasn't available in those days and is an easier and same weight solution that is plenty stiff enough).

You could use the .020" rod in the FF kit for stab spars, but, I don't remember, is it cut too short for the Carbon Penny?

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Re: Wright Stuff C

Post by xiangyu » March 15th, 2020, 3:59 am

I see. Thanks for all the detailed guidance! I will ask here if I have questions or encounter problems during the build! :D
2020 Events: Wright Stuff, Gravity Vehicle. Circuit Lab, Boomilever, Ping-Pong Parachute, WIDI

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Re: Wright Stuff C

Post by xiangyu » March 16th, 2020, 2:48 pm

One more question. For the wing covering, is microfilm the same thing as mylar? I see people in tutorials use microfilm for pennyplanes and F1Ds so I was wondering if I need to get some as I only have the mylar covering from Freedom Flight.

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Re: Wright Stuff C

Post by coachchuckaahs » March 16th, 2020, 4:09 pm

Currently, use either the Ultrafilm (like FFM supplies), or try Super Ultra Film (See Ray Harlan or FAI Model Supply). Super is thinner than the SO version, and will help make weight.

Microfilm is old school, where you made a film by dripping chemicals on a smooth pool of water.

We used the Super for LPP.

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Re: Wright Stuff C

Post by CrayolaCrayon » March 16th, 2020, 4:45 pm

coachchuckaahs wrote:
March 16th, 2020, 4:09 pm


Microfilm is old school, where you made a film by dripping chemicals on a smooth pool of water.

https://youtu.be/vMkXJApR8M4?t=11

Very cool stuff!!
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Re: Wright Stuff C

Post by OpticsNerd » March 18th, 2020, 6:07 pm

Do you guys think they will at least change the specifications for next year?

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Re: Wright Stuff C

Post by CookiePie1 » March 18th, 2020, 6:16 pm

OpticsNerd wrote:
March 18th, 2020, 6:07 pm
Do you guys think they will at least change the specifications for next year?
they may or may not. This is quite an unprecedented situation, so nobody really knows what will happen with the rules for any events.
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Re: Wright Stuff C

Post by OpticsNerd » March 18th, 2020, 6:18 pm

CookiePie1 wrote:
March 18th, 2020, 6:16 pm
OpticsNerd wrote:
March 18th, 2020, 6:07 pm
Do you guys think they will at least change the specifications for next year?
they may or may not. This is quite an unprecedented situation, so nobody really knows what will happen with the rules for any events.
They did release this on their main site:
https://www.soinc.org/sites/default/fil ... 031820.pdf
These users thanked the author OpticsNerd for the post:
CookiePie1 (March 18th, 2020, 6:20 pm)

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Re: Wright Stuff C

Post by CookiePie1 » March 18th, 2020, 6:22 pm

OpticsNerd wrote:
March 18th, 2020, 6:18 pm
CookiePie1 wrote:
March 18th, 2020, 6:16 pm
OpticsNerd wrote:
March 18th, 2020, 6:07 pm
Do you guys think they will at least change the specifications for next year?
they may or may not. This is quite an unprecedented situation, so nobody really knows what will happen with the rules for any events.
They did release this on their main site:
https://www.soinc.org/sites/default/fil ... 031820.pdf
Well, it doesn't mention Wright Stuff explicitly, so i still think it could go both ways. Although, after reading the article, especially regarding the resources cost part, I'm starting to think that the specs might not change for next year. :(
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2020 Events: Protein Modeling, Ping Pong Parachute, Wright Stuff, Sounds of Music

Reality is merely an illusion, albeit a very persistent one.
-Albert Einstein

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Re: Wright Stuff C

Post by OpticsNerd » March 18th, 2020, 6:27 pm

CookiePie1 wrote:
March 18th, 2020, 6:22 pm
OpticsNerd wrote:
March 18th, 2020, 6:18 pm
CookiePie1 wrote:
March 18th, 2020, 6:16 pm


they may or may not. This is quite an unprecedented situation, so nobody really knows what will happen with the rules for any events.
They did release this on their main site:
https://www.soinc.org/sites/default/fil ... 031820.pdf
Well, it doesn't mention Wright Stuff explicitly, so i still think it could go both ways. Although, after reading the article, especially regarding the resources cost part, I'm starting to think that the specs might not change for next year. :(
I mean, next year if they allow for bigger stabs and props with no other changes this year's planes would technically still be viable, assuming you got yours to actually fly very well.

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