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« Reply #25 on: June 30, 2015, 11:18:19 AM »
bmblb
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....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?
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« Reply #26 on: June 30, 2015, 12:30:41 PM »
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...here's the answer....will require a looong nose...but how long  Head Scratching

Stork.jpg
Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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« Reply #27 on: June 30, 2015, 12:35:41 PM »
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....i just had to post this....

God...tussi great ho ! Bow Grin Bow

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Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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« Reply #28 on: June 30, 2015, 06:20:58 PM »
rastsaurabh
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Nice going ..... you don't have to put newspaper anymore and spoil pics....!!

Just go ahead with the project and do maiden.
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« Reply #29 on: July 01, 2015, 10:14:27 PM »
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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 !
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« Reply #30 on: July 01, 2015, 10:17:00 PM »
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some progress.....

IMG_20150701_220951469.jpg
Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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« Reply #31 on: July 01, 2015, 10:19:55 PM »
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one more....quite close to the sketch in post 1....

IMG_20150701_220853779.jpg
Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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« Reply #32 on: July 01, 2015, 11:35:59 PM »
rastsaurabh
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Am i wrong or kf is below wing?
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« Reply #33 on: July 03, 2015, 03:26:13 PM »
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Am i wrong or kf is below wing?

....depends how you look at it ! probably both would work, one better than the other
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« Reply #34 on: July 03, 2015, 04:36:46 PM »
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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.
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« Reply #35 on: July 03, 2015, 04:51:16 PM »
docnayeem
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Re:

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.
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« Reply #36 on: July 03, 2015, 05:12:01 PM »
K K Iyer
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KFm1,2,3,4 explained
www.daddyhobby.com/forum/attachment.php?s=019c721a7affbbe6cb93d5cd64d96ccd&attachmentid=53305&stc=1&d=1195348459
« Last Edit: July 03, 2015, 05:36:38 PM by K K Iyer » Logged
 

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« Reply #37 on: July 06, 2015, 11:02:39 AM »
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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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« Reply #38 on: July 06, 2015, 11:09:21 AM »
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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 -  Grin

....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

IMG_20150706_104218588.jpg
Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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« Reply #39 on: July 06, 2015, 11:48:51 AM »
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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 Grin

.....hope to maiden both together.....
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« Reply #40 on: July 06, 2015, 11:53:54 AM »
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......I hope its ok to look around for info and is not in violation to the SW rules Huh? Head Scratching
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« Reply #41 on: July 17, 2015, 10:21:26 AM »
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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 !!!



IMG_20150710_151243719.jpg
Re: 2015 Sweepstakes Entrant -42" Gull Wing Flying Wing
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