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Old Sep 24, 2012, 02:18 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,323 Posts
Trev,
Smart little chuckie - Is it just me or does anyone else think something like that scaled up to about 8' would make a splendid thing for light wind days on the slope?

Regards,

Richard
(absolutely NOT starting anything else until all present projects finished - and this time I mean it.... probably )
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Old Sep 24, 2012, 02:46 PM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,357 Posts
Go for it Richard!
Planform reminded me straight away of this,which I was messing about with when Kent got the forum going.One day----------...
Stuart
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Old Sep 24, 2012, 03:14 PM
Deniable plausibility
Shedofdread's Avatar
Derbyshire, UK
Joined Aug 2008
2,323 Posts
No, too many things on the go at the mo. Maybe in a while...

While on this sort of topic - have you done that little moulding we job we spoke about? Or have I missed it?
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Old Sep 24, 2012, 03:54 PM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,357 Posts
Quote:
Originally Posted by Shedofdread View Post
No, too many things on the go at the mo. Maybe in a while...

While on this sort of topic - have you done that little moulding we job we spoke about? Or have I missed it?
Afraid not,though I keep doing bits on the airframe from time to time.As for you missing it,no chance.You'll be"holding my hand"at every step.:
Stuart
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Old Sep 25, 2012, 06:20 PM
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Joined Jul 2012
26 Posts
Quote:
Originally Posted by Knoll53 View Post
Wow that is light !

Maybe a main skid just behind the CG would add a little durability to this ship. It could serve as a handle too for the bungee launch.

Kent
Hi Kent, here's a picture of the lower part of the rudder that if knocked on landing strips the servo and so will be reshaped . Funnily enough it was the general 'shapeliness' of the pod/fin that prompted me to build this plane, though the problem wouldn't arise as a free-flighter of course with a one piece tail.
Thanks for the skid suggestion, probably will fit that as a keel/row of hooks integrated with the shape of the lower pod.

Trev
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Old Sep 25, 2012, 08:55 PM
less is more
Knoll53's Avatar
United States, CA, Marina
Joined Sep 2006
2,862 Posts
Quote:
here's a picture of the lower part of the rudder that if knocked on landing strips the servo and so will be reshaped .
You might consider a Hitec 82MG servo with the metal gears. You won't strip them. We use them for our EPP slope ships and take tons of abuse.

Kent
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Old Oct 03, 2012, 09:07 PM
"Come and take it B'yatch"
flashted's Avatar
United States, FL, Coral Springs
Joined Sep 2008
43 Posts
My wing

Thermals in a vapor
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Old Oct 04, 2012, 07:52 AM
Herk
HerkS's Avatar
Virginia USA
Joined Jun 2007
1,650 Posts
Ted - beautiful -- details please ?????
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Old Oct 04, 2012, 07:58 AM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
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Old Oct 05, 2012, 12:17 PM
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wing gerd's Avatar
Switzerland, ZH, Wald
Joined Mar 2011
13 Posts
Rising Star

Hello,

My name is Gerd and I live at the moment in Swizzerland. Here is my last plank project. Wingspan 4m build from laserkit complete in plywood with lasered aluminum wing fixation. The plank flys not bad, but I`m still testing

Here a llittle clip from maiden flight

http://www.rcmovie.de/video/86ed556d...r-neue-Version

Gerd
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Old Oct 05, 2012, 12:28 PM
less is more
Knoll53's Avatar
United States, CA, Marina
Joined Sep 2006
2,862 Posts
Great model ! 4 meters....what a beast....and light too. Looks to fly very well indeed.

Feel free to post more photos if you have them.

Kent
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Old Oct 05, 2012, 12:52 PM
I don't like your altitude
Stupot46's Avatar
Joined Sep 2011
3,357 Posts
Couldn't get the videoApple/flash thing.
Nice wing though!
Hand up at the back of the class(I need an acronym for this) Highly tapered tips= tip stall?
Regards Stuart
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Old Oct 05, 2012, 12:56 PM
less is more
Knoll53's Avatar
United States, CA, Marina
Joined Sep 2006
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Quote:
Originally Posted by Stupot46 View Post
Highly tapered tips= tip stall?
Regards Stuart
No, not the case. A highly tapered tip is just one factor. Wing twist and airfoil selection can cure potential tip stall.

The videos shows a well behaved ship.

Kent
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Old Oct 05, 2012, 01:35 PM
Just call me crash for short
Quick61's Avatar
United States, OH, The Plains
Joined Jan 2011
1,693 Posts
And for all of those that say size doesn't matter.....

Sweet ship Gerd. Am I seeing elevators and ailerons on the wing? Very nice video too. More details please.

Mark
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Old Oct 05, 2012, 03:19 PM
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wing gerd's Avatar
Switzerland, ZH, Wald
Joined Mar 2011
13 Posts
infos

Ok..... my plan was a elliptic plank with the possibility of butterfly for easier landing in the mountains. Actually i use the outer airlerons with delta mix and the inner just as elevator plus butterfly.
The wing is complete straight without any twist. I used the old CJ 3309 airfoil. There is absolut no tipstall! with this configuration. The Mainspar is a torsion box made from 3mm plywood with 9mm pinewood spars inside. This gives us enough stifness. Since 3 or 4 designs I use a big cover at the left fuselage side for easier component handling. The fin airfoil is NACA 0009

A little build log with a lot pictures is postet here:
http://www.rc-network.de/forum/showt...4m-Brett/page7

A early version was build with just 2 airlerons, here we got problems with landing wihout butterfly
http://www.rcmovie.de/video/129a75aa...94/Rising-Star
this version was too light. The stifness was also not that good. But for thermal gliding good enough

Gerd
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