HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Mar 08, 2006, 02:25 PM
Striving to Rip the Bring
raptor22's Avatar
San Diego, socal, USA, North America, Earth, Solar System, the Orion arm, Milky way, Universe
Joined Apr 2003
6,320 Posts
Discussion
Ever fly your 3m without the tip panels?

Mr Innocent and i have been talking about this alot....it occured to us both at the same time when we were watching Bob Bro talk to some of the f3f gusy without the tip panels on his....would an f3f ship fly with only the center panel?

I would have to say yes, it would fly with enough lift....but I don't have a plane to test it on, and my freinds all seem strangely wary of the idea of throwing their $1.5K model out over the gaping hole of death at laguna without a proven planform...I wonder why?

Anyways, we can't be the only ones who thought this...who's tried it? Anyone?

--Alex

PS, seems the cg would move back alot
raptor22 is offline Find More Posts by raptor22
Reply With Quote
Sign up now
to remove ads between posts
Old Mar 08, 2006, 02:48 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,667 Posts
Actually the CG shouldn't change much since it's already under the
main wing. If anything it'd need to move forward a little because
without the curving tip panels the average center of lift would be further
forward (rectangular planform has an average center of pressure
further forward than one with an eliptical leading edge).

The relative surface areas of main wing and tail, and tail moment
would be totally wrong, but an over tailed plane should still fly OK
as long as the decalage is pretty close to zero.

ian
Daemon is offline Find More Posts by Daemon
RCG Plus Member
Old Mar 08, 2006, 03:11 PM
SCAMMERS WELCOME!!!!!!!!!
trashmanf's Avatar
Kent, WA
Joined Dec 2003
2,797 Posts
for sure lets see some video of mr. I throw his trinity out sans tip panels!
trashmanf is offline Find More Posts by trashmanf
Reply With Quote
Old Mar 08, 2006, 03:15 PM
Registered User
SchiessCo's Avatar
North Hills
Joined Nov 1999
6,073 Posts
Sounds like it would be unstable in the roll axis since you’d have less tip-mass and no dihedral. All in all a good thing to try with someone else’s ride.

Pete
SchiessCo is offline Find More Posts by SchiessCo
Reply With Quote
Old Mar 08, 2006, 03:33 PM
Confirmed Chronic
screamin' eagle's Avatar
Pacific Palisades, CA
Joined Jul 2004
9,238 Posts
What would happen? It would suck to fly, and $50 says the fuse comes back broken in two. Now back to doing homework!
screamin' eagle is offline Find More Posts by screamin' eagle
Reply With Quote
Old Mar 08, 2006, 04:16 PM
Registered User
Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,667 Posts
Quote:
Originally Posted by SchiessCo
Sounds like it would be unstable in the roll axis since you’d have less tip-mass and no dihedral. All in all a good thing to try with someone else’s ride.
No less stable than any other 1-1.5meter plane with full span flaperons
and no dihedral. Mainly I think the problem is wing loading (it'll need a lot
of wind, it'll fly very fast, and land very fast), and the huge tail moment
will make the pitch response kind of weird.

ian
Daemon is offline Find More Posts by Daemon
RCG Plus Member
Old Mar 08, 2006, 05:44 PM
Sayonara
JEB21's Avatar
Agoura Hills,CA
Joined Mar 2004
656 Posts
JEB21 is offline Find More Posts by JEB21
Reply With Quote
Old Mar 08, 2006, 05:54 PM
It pays to be a winner
Keith R.'s Avatar
T-Town, AZ
Joined Jun 2004
1,733 Posts
WTH would you want to do that Alex? Unless of course you just wanted to see how you could destroy a perfectly good plane...

Keith
Keith R. is offline Find More Posts by Keith R.
Reply With Quote
Old Mar 08, 2006, 06:37 PM
chetosmachine's Avatar
Madrid, Spain
Joined Sep 2004
1,102 Posts
You mean something like this photo??
(from www.lomcovak.cz)
Chets
chetosmachine is offline Find More Posts by chetosmachine
Reply With Quote
Old Mar 08, 2006, 07:31 PM
************
Drew360's Avatar
Joined Apr 2005
597 Posts
^^^^^^aaaaahahahahah^^^^^^^^^^
Drew360 is offline Find More Posts by Drew360
Reply With Quote
Old Mar 08, 2006, 08:43 PM
Registered User
SchiessCo's Avatar
North Hills
Joined Nov 1999
6,073 Posts
Quote:
Originally Posted by Daemon
No less stable than any other 1-1.5meter plane with full span flaperons and no dihedral.
Which is why you don't see many 1.5M sailplanes* without dihedral .

That's a damn great picture chetos.' Funny what goes on at the slope...

Pete

*flying wings excluded
SchiessCo is offline Find More Posts by SchiessCo
Reply With Quote
Old Mar 08, 2006, 08:46 PM
Feeling FrSky
surfimp's Avatar
United States, CA, Santa Barbara
Joined Feb 2003
20,091 Posts
I'm sure it would fly given sufficient wind--if slopers have proven anything, it's that with sufficient airspeed the "wind will rip the bring into a foil" and the magic will happen.

Of course, the better question is... WHY?

Steve
surfimp is offline Find More Posts by surfimp
RCG Plus Member
Old Mar 08, 2006, 08:55 PM
Don't cut the Yellow Wire
dr.E's Avatar
Ridgewood ,NJ
Joined Jan 2000
3,563 Posts
WHY?


Because if you Sand it Round and Carefull decal placement it should attain Brick*
dr.E is offline Find More Posts by dr.E
Reply With Quote
Old Mar 08, 2006, 09:01 PM
Striving to Rip the Bring
raptor22's Avatar
San Diego, socal, USA, North America, Earth, Solar System, the Orion arm, Milky way, Universe
Joined Apr 2003
6,320 Posts
Quote:
Originally Posted by surfimp
I'm sure it would fly given sufficient wind--if slopers have proven anything, it's that with sufficient airspeed the "wind will rip the bring into a foil" and the magic will happen.

Of course, the better question is... WHY?

Steve
Because you COULD! I'm very disapointed in the sloper spirit of anyone who would ask "why"

We've got a place w/ enough lift, it would be cool!
raptor22 is offline Find More Posts by raptor22
Reply With Quote
Old Mar 08, 2006, 09:06 PM
Mr. Innocent's Avatar
Oceanside CA
Joined Dec 2004
4,046 Posts
Quote:
Originally Posted by Keith R.
WTH would you want to do that Alex? Unless of course you just wanted to see how you could destroy a perfectly good plane...

Keith
OMG Keith, of all people you should be shutting up. No one I know has crashed a heli in to a windshield two times.
Mr. Innocent is offline Find More Posts by Mr. Innocent
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Fly your wing without vertical stabs: Anyone? Pjotrrr Foamies (Kits) 10 Aug 27, 2003 12:12 AM
first person ever to fly across the English Channel without the benefit of an aircraf omega blood Life, The Universe, and Politics 2 Aug 01, 2003 07:07 AM
Fly Your Flag Today E-Challenged Electric Plane Talk 2 Sep 11, 2001 04:33 PM
Superbike (Mike) did you fly your Honey? hmhoshi Electric Sailplanes 15 Jul 01, 2001 06:27 PM
How do you try to fly your newly built plane on it's first launch Feodosia Flyer Beginner Training Area (Aircraft-Electric) 14 May 02, 2001 10:26 PM