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Old Dec 14, 2011, 03:03 PM
Houba ! Houba !!
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United Kingdom, England, Milton Keynes
Joined Sep 2003
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I am salivating already . that is one sexy looking bird !!!! I'll keep an eye on this ! I was promising myself not to get MORE platforms but this one is definitely a wallet tickler !!!!
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Old Dec 14, 2011, 03:26 PM
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When they start selling, will somebody with more money than me please mod one with a turbine and post a video of it flying.
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Old Dec 14, 2011, 03:40 PM
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United States, OH, Parma
Joined Jul 2009
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we'll call it a furbine (foamie turbine)
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Old Dec 14, 2011, 03:43 PM
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Man that was fast. Iran to China in a hart beat.

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Old Dec 14, 2011, 03:45 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
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Keep dreaming.
Highly swept, high aspect, foam wings, are not suitable for super go fast RC turbine planes.
Too much flex, twist, and flutter. Maybe a tiny little turbine just to push it around
but not much point in it.

ian
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Old Dec 14, 2011, 03:50 PM
If it flies, I can crash it!
djdavid60's Avatar
Naperville, IL
Joined Aug 2010
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Quote:
Originally Posted by CheckSum View Post
When they start selling, will somebody with more money than me please mod one with a turbine and post a video of it flying.
You mean post a video of it melting
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Old Dec 14, 2011, 03:53 PM
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Quote:
Originally Posted by zkilzz View Post
Man that was fast. Iran to China in a hart beat.

What the heck!! BEVRC is selling to Iran and not us first
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Old Dec 14, 2011, 04:08 PM
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I know your worst fears Ian . It would be good to see the bottom of this beast. It would be pointless to design the plane that can carry 2Ah or more and being unable to launch it.

Regards
Michal
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Old Dec 14, 2011, 04:11 PM
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tushev's Avatar
USA, NY, New York
Joined Nov 2008
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Quote:
Originally Posted by Daemon View Post
Keep dreaming.
Highly swept, high aspect, foam wings, are not suitable for super go fast RC turbine planes.
Too much flex, twist, and flutter. Maybe a tiny little turbine just to push it around
but not much point in it.

ian
Like this one..
Stryker RC plane powered by Jet Joe Jr turbine (2 min 21 sec)
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Old Dec 14, 2011, 04:21 PM
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Quote:
Originally Posted by djdavid60 View Post
You mean post a video of it melting
That problem can be overcome. Search for the various Multiplex Funjet and Twinjet vids.

ian
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Old Dec 14, 2011, 04:25 PM
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Lakewood, Colorado
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Quote:
Originally Posted by tushev View Post
No, it's not the same.
That is, by comparison a very low aspect swept wing (like some full scale jets). I was very
specific about the wording of the problem. High aspect (long and thin), highly swept wings,
have a problem going very fast. People have been trying to overcome it for decades with slope
gliders yet they still twist and flutter. It's due to the effects of spanwise flow,
which usually requires building some washout into the airfoil (lower
angle of attack at the tips than root). Washout causes the
wing to twist when you go very fast, and any wing that wants to
twist, will usually flutter at some speed. Also, it's much harder to reinforce the
whole wing, when you can't run spars from tip to tip through the
center, due to the sweep.

If we were talking a composite construction, then could probably pull it off, but this is EPO.

ian
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Last edited by Daemon; Dec 14, 2011 at 04:36 PM.
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Old Dec 14, 2011, 04:27 PM
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Lakewood, Colorado
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Quote:
Originally Posted by tty044 View Post
I know your worst fears Ian . It would be good to see the bottom of this beast. It would be pointless to design the plane that can carry 2Ah or more and being unable to launch it.

Regards
Michal
Ya, you got it (although you probably meant 20Ah). It looks like from the latest vid, that
he was able to hold and launch it from near the CG, but also looked sort of like he was
doing it by his finger tips so I'd very much like to see what there is to hold onto down there.

ian
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Old Dec 14, 2011, 05:27 PM
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USA, NY, New York
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The X8 is not that big, I mean the wings look thick. for its size, also you can always put some extra rods, on which point I am getting nostalgic for EPP/GOOP magic combo, uh.
Anyway I am fine flying electric.
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Old Dec 14, 2011, 07:27 PM
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Toronto Canada
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Lots of solar cells would fit on that!!!!!!
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Old Dec 14, 2011, 08:18 PM
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Near Austin
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I may have just quit cutting foam........
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