2015 Sweepstakes Entrant -42" Gull Wing Flying Wing

Started by bmblb, June 27, 2015, 05:26:21 PM

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bmblb

....Location of NP from LE = 0.75in
....Location of CG from LE = 0.41in
....Difference = 0.34in

So Static margin = (NP-CG)/MAC =0.34/7.7=4.4% ?

Could someone please confirm if this sounds right?
"The Flight Of The Bumblebee"

bmblb

...here's the answer....will require a looong nose...but how long  :headscratch:
"The Flight Of The Bumblebee"

bmblb

....i just had to post this....

God...tussi great ho ! :bow: ;D :bow:
"The Flight Of The Bumblebee"

rastsaurabh

Nice going ..... you don't have to put newspaper anymore and spoil pics....!!

Just go ahead with the project and do maiden.

bmblb

Quote from: rastsaurabh on June 30, 2015, 06:20:58 PM
Nice going ..... you don't have to put newspaper anymore and spoil pics....!!

Just go ahead with the project and do maiden.

Thank you ! no more fighting for the news paper !
"The Flight Of The Bumblebee"

bmblb

"The Flight Of The Bumblebee"

bmblb

one more....quite close to the sketch in post 1....
"The Flight Of The Bumblebee"

rastsaurabh


bmblb

Quote from: rastsaurabh on July 01, 2015, 11:35:59 PM
Am i wrong or kf is below wing?

....depends how you look at it ! probably both would work, one better than the other
"The Flight Of The Bumblebee"

rastsaurabh

no unless you plan to fly inverted its not the conventional way to do it......

As I understand KF is supposed to give lift ... in your case its upside down!!!

Anyway lets see how it come out.... Ask someone expert to do maiden.

docnayeem

This seems to be Kfm -1 to me,
And if so should not be an issue as even Kfm1 is considered to have very stable flying characteristics, but with little less lift in comparison to Kfm2 .
So for a flying wing I guess its well suited.

K K Iyer

#36
KFm1,2,3,4 explained
www.daddyhobby.com/forum/attachment.php?s=019c721a7affbbe6cb93d5cd64d96ccd&attachmentid=53305&stc=1&d=1195348459

bmblb

hi saurabh....sorry, I assumed you were discussing the benefits of one over the other hence the equally vague reply

anyway, Iyer Sir and docnayeem have clariifed
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bmblb

#38
here are some pics of the gull wing plane......it ended up looking like a bird with the tail feathers.....
after a LOT of thought.

I just have to add the top sheet and a hatch....CG seems right....a bit nose heavy with a 3S 750....just right with a 610.

weighs about 360 grams and feels like it would fly.

...and I just had to open up one side of the coro flute for the hinge -  ;D

....looks a lot better.....will post some pics when completed.

I started another build for the SW entry...here it is...http://www.rcindia.org/electric-planes/fenix-48-in-kfm2-bird-like-plane-2015-sweepstakes-entry/new/#new
"The Flight Of The Bumblebee"

bmblb

some interesting and relevant discussion on the query I posted on RCG......thought I'd share.

http://www.rcgroups.com/forums/showthread.php?t=2449214

the neutral point I arrived at seems to be right ;D

.....hope to maiden both together.....
"The Flight Of The Bumblebee"

bmblb

......I hope its ok to look around for info and is not in violation to the SW rules ??? :headscratch:
"The Flight Of The Bumblebee"

bmblb

This could happen to you OR has already happened

.....last Fri, I took 4 planes to fly - two old ones, This One and The Fenix.

....the backrest of my rear seat slammed down as I applied brakes at a speed breaker. It is under repairs right now. Test glides were ok.

Here are some pics of the finished plane.

...ensure the backrest of your rear seat is locked !!!


"The Flight Of The Bumblebee"