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Old Oct 18, 2008, 02:47 PM
Registered User
Kopenhagen
Joined Apr 2005
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Amokka Race Plank

Dear Slope friends

Finally I succeded to make a video of the moulded Amokka flying wing. You can find a short description here:
http://www.rcsoaringdigest.com/pdfs/...SD-2008-09.pdf
Sorry about the rather clumsy clipping, but it was the first time I was doing it, but anyway the video shows some of the potentials of planks aiming at a F3F racing.
Here the link to the video:
The Amokka Plank video (6 min 23 sec)


Yours Peter
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Old Oct 18, 2008, 03:15 PM
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United Kingdom
Joined Feb 2005
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It's interesting
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Old Oct 18, 2008, 04:06 PM
Scorpian 60'' 2012
BMtech's Avatar
Kurrajong Australia
Joined Jul 2005
1,455 Posts
Hi there Peter,

I was wondering when you would have this done !

When Sensibilnick started the Retox I thought that it might have been put on the back burner never to see the light of day

Im down loading the video now & it looks great so far

Any specs span,weight ?

Rick
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Old Oct 18, 2008, 04:33 PM
Registered User
Kopenhagen
Joined Apr 2005
142 Posts
Dear Rick

I will make some comments in some of the next issues of Rc soaring digest, but here some specs.:
Span : 1,96m
Wing aera: 37,83dm2
Aspect ratio: 10,15
4 different airfoils along the span
Weight: 1.5kg (160gr. lead!!!!)

Next one will be F3F size!!

Yours Peter
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Old Oct 18, 2008, 04:43 PM
powered by caffine
FredM's Avatar
Akron, New York
Joined May 2004
914 Posts
Peter
what an awesome performing plank. looks like it is flying on rails! fred
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Old Oct 18, 2008, 10:18 PM
Scorpian 60'' 2012
BMtech's Avatar
Kurrajong Australia
Joined Jul 2005
1,455 Posts
Quote:
Originally Posted by Peter Wick
Dear Rick

I will make some comments in some of the next issues of Rc soaring digest, but here some specs.:
Span : 1,96m
Wing aera: 37,83dm2
Aspect ratio: 10,15
4 different airfoils along the span
Weight: 1.5kg (160gr. lead!!!!)

Next one will be F3F size!!

Yours Peter
Thanks for the heads up on the articles in Rc soaring cant wait .

My 2mt plank is coming on slow & the 1.5kg is looking close I hope

Rick
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Old Oct 19, 2008, 10:34 AM
The Predator
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Golden, Colorado
Joined Dec 2004
3,565 Posts
Looks to pull very efficiently, I wonder what we could use that for????

I liked your race turns at min. 5+, very clean, efficient, and homogenious. Because it takes more then a great plank to win a race!
But it SURE HELPS! LOL

Cheers Peter,

Karl
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Old Oct 19, 2008, 11:47 AM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,313 Posts
Really elegant looking design which looks like it flies as well as it looks.

I've read the article in post1 and have a few questions - do you use a rudder? If not would you use one on the larger version? Also how do find 'crow' braking on a tailless design?

Thanks.

S
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Old Oct 19, 2008, 01:53 PM
Registered User
Kopenhagen
Joined Apr 2005
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Dear S

no there is no rudder. So far the settings are very simple. Fullspann elevator and fullspan aileron without differential, Crow breaking.
So far I am not planing a rudder on the fullblooded version. This one will have more aspect ratio but also more taper, but I hope this version will behave as Amokka, where there is almost no adverse yaw visible, even when flying very slow.
Crow breaking is a little bit different as from F3X planes. So far I think it breaks a lot, meaning a lot of height is lost, but it does not slow the Amokka down like it does on a F3X plane. So the landing plan is something like this: Come in at good height, crow break with nose down all the time, the speed is not that high, and flare out close to the ground with no flaps. If overshooting seems to become a problem, just open the crow for a short moment and the plane bleeds of speed.
I think it is ok, not as comfortable as on a F3X plane, but I am getting used to it.
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Old Oct 19, 2008, 02:47 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,313 Posts
Peter,

Thanks for the info. Do you have any more pics you can post?

S
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Old Oct 19, 2008, 04:07 PM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,136 Posts
Cut me set of the wings please
Great looking /flying/could not be better plane
Yuri.
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Old Oct 19, 2008, 05:01 PM
Long to be flyin'
Antonsoarer's Avatar
Wirral, (UK)
Joined Dec 2003
3,056 Posts
Looks and moves really nice Peter, I don't doubt you will deliver a viable F3F design. The zooms at the end of the speed runs showed great energy retention. It would be good to see it fly alongside a conventional 2 metre design, it certainly looked less draggy than many at my slope.
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Old Oct 19, 2008, 05:42 PM
Say when.....
quigley257's Avatar
United States, MO, Hillsboro
Joined Sep 2005
1,389 Posts
Sweet planky!! Lets see some still photos.

--quigley
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Old Oct 19, 2008, 07:10 PM
Live for speed
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USA, CT, Bethany
Joined Mar 2004
1,368 Posts
Flies really nice and smooth!
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Old Oct 19, 2008, 08:05 PM
Detail Freak
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Harbor City, CA
Joined Oct 2003
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PM sent.

Target
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