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Author Topic: GeeBee Sportster model D 16”  (Read 187 times)
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kaintuck
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« on: March 18, 2020, 01:20:25 PM »

Been looking at the plans...finally stoped on others to put this together....using the lightest techniques I can do..geared motor....rudder,elevator on the micro 1.5gm servos, and a 130mah battery, and super small flysky rc.....the wings are still being put together using just caps....anyways, current fuse weight 21.6gm
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GeeBee Sportster model D 16”
« Last Edit: March 18, 2020, 02:29:12 PM by kaintuck » Logged
OZPAF
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« Reply #1 on: March 18, 2020, 08:19:37 PM »

Looks an interesting little model. Good luck with it.

John
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kaintuck
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« Reply #2 on: March 25, 2020, 08:02:17 AM »

34gms without the batt or rc, 16” wing with a 3”....is this way to heavy.....Huh
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Re: GeeBee Sportster model D 16”
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g_kandylakis
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« Reply #3 on: March 25, 2020, 11:39:24 AM »

34 gr the model alone? No RC at all?

What is your estimate about the a.u.w.?

Any idea about the wing area? Wing loading is important to know or to plan for...

Looks good though.

George
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RalphS
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« Reply #4 on: March 25, 2020, 12:23:02 PM »

My Veron Hawker Fury in this Micro r/c section weighs 43g AUW ready to fly.  Wing area is 78 Square inches.  It flies nicely outdoors but would need to be flown in tight circles indoors.  The GeeBee machines were racers and need to be flown fast!

You have nearly finished it now so you can soon find out.  Good luck and please post video.  It looks good.
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g_kandylakis
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« Reply #5 on: March 25, 2020, 12:38:39 PM »

that would translate to 8,5 gr/dm2, quite acceptable... With a biplane correction factor, maybe 70% active wing area, 12 gr/dm2, again ok... I imagine the tight circles have more to do with the hall size and those ugly walls...

As for the GeeBee, 16" span, 3" chord, roughly 3,1dm2

34 gr + 3 for servos, + 5 for battery, + 2 for Rx, les say approx. 44 grams

44/3,1 = 14 gr/dm2. Fast but ok... Racer..

George
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kaintuck
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« Reply #6 on: March 27, 2020, 07:14:08 AM »

Thank you George ....the wing area you calculated is spot on...I’m waiting for my batt and rc to get here...but as she sits, servos installed but no control rods yet....she’s 34 grams.....
I hope flys....even if it’s scale speeds!!! Shocked
Marc
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