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May 27, 2012, 03:49 PM
Team EJF >>>WHOOSH>>>
AceMigKiller's Avatar
Quote:
Originally Posted by jcdfrd
no disrespect Vic just trying to help us get to a proper resolution and hopefully a low cost easy one

John
None taken.

Each one of your "theories" is correct via textbook.
We can go round and round and round... I'll I'm saying at the end of the day is that we're actively working solutions on several fronts.

Right here, right now, as long as your hinges are adhered properly and anchored into wood, you're going to be just fine. There is no aerodynamic flutter present up to and including 150mph. (We're working on a video to prove it.)

Looking ahead, there's talk of a Split-Elevator design and HET has been contacted about the immediate QA issue of assuring that the Trailing Edge of each Control Surface gets a solid, properly adhered anchor (wood).

Vic
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May 27, 2012, 03:58 PM
fly like an EAGLE ;)
corsair nut's Avatar
mounting a keychain cam on the fuse looking at the stab and doing so high speed dives on film would put this to rest.
May 27, 2012, 04:05 PM
Callsign blocked
Brickyard's Avatar
Quote:
Originally Posted by Kevin Greene
Of all of those planes mentioned none have the elevators larger at the tips than at the root...They, for the most part, look like Extremes example..

Kevin
No, Extreme changed the entire shape of the stab utilizing L-39 type elevators (big root, small tip)... I'm saying to keep the stab/airfoil exactly the same, but make the elevators the same width throughout like every plane I mentioned.
May 27, 2012, 04:07 PM
Robert Wagoner's Avatar
Quote:
Originally Posted by corsair nut
mounting a keychain cam on the fuse looking at the stab and doing so high speed dives on film would put this to rest.
I think that's what the guys will be doing ASAP and maybe they can mount a smoke streamer and get some views of the flow.

--RW
May 27, 2012, 04:08 PM
Registered User
Quote:
Originally Posted by Brickyard
No, Extreme changed the entire shape of the stab utilizing L-39 type elevators (big root, small tip)... I'm saying to keep the stab/airfoil exactly the same, but make the elevators the same width throughout like every plane I mentioned.
Gotcha---I was just looking at and making reference to the shape of the elevators themselves, not the entire stab...Again---Great to see Robert being an active participant.....

Kevin
May 27, 2012, 04:17 PM
Need 4 Speed!
pdawg's Avatar
Quote:
Originally Posted by Robert Wagoner
I'm going to arrange at the local UofA Aerospace lab for us to bring over a functional elevator assembly to be run in the wind tunnel. Then we can get this figured out once and for all on the existing details of dynamics and potential redesign of control surface design and shape.

--RW
Spent a lot of time in that wind tunnel! I don't believe this test is worth of the electricity cost of running that tunnel...its abundantly obvious that the construction shortcuts compromise the aerodynamics of this elevator leading to increased likelihood of flutter. No need to test it out in a wind tunnel.
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May 27, 2012, 04:20 PM
Team EJF >>>WHOOSH>>>
AceMigKiller's Avatar
Quote:
Originally Posted by corsair nut
mounting a keychain cam on the fuse looking at the stab and doing so high speed dives on film would put this to rest.
We're probably going Contour HD
May 27, 2012, 04:26 PM
Robert Wagoner's Avatar
Quote:
Originally Posted by pdawg
Spent a lot of time in that wind tunnel! I don't believe this test is worth of the electricity cost of running that tunnel...its abundantly obvious that the construction shortcuts compromise the aerodynamics of this elevator leading to increased likelihood of flutter. No need to test it out in a wind tunnel.
I'm all ears. here is a stab we were going to take over. we pinned all the hinges and secured the servo tray in.

--RW
May 27, 2012, 08:39 PM
Registered User
evo101's Avatar
will the eflight Habu 32 15 - 25 retracts fit this baby using differant struts ?
May 27, 2012, 08:44 PM
fly like an EAGLE ;)
corsair nut's Avatar
taped and glued servos are for foamies. i dont think flutter caused the servo to let go...it was simple force that broke the servo loose. het should have known better than to suggest simply taping and gluing the servo in.
May 27, 2012, 08:53 PM
3DHOG
jcdfrd's Avatar
Quote:
Originally Posted by spyda00
will the eflight Habu 32 15 - 25 retracts fit this baby using differant struts ?
they fit perfect, Tam is making struts for this just like the habu32, they will be more than adequate and lite

I had to mod the nosewheel mount to get the right height, I think tam posted some pics a few pages back of the mod and fit
Last edited by jcdfrd; May 27, 2012 at 09:12 PM.
May 27, 2012, 08:57 PM
Registered User
evo101's Avatar
great news as i have 3 sets of these lying around now

Quote:
Originally Posted by jcdfrd
they fit perfect, Tam is making struts for this just like the habu32, they will be more than adequate and lite
May 27, 2012, 09:16 PM
MAAC SAVED RC!!
vettster's Avatar
Quote:
Originally Posted by Robert Wagoner
I'm all ears. here is a stab we were going to take over. we pinned all the hinges and secured the servo tray in.

--RW
I think the test should be done with the H stab attached to the plane as well as off the plane. The air coming off the wings and hitting the stab could have an overall effect that might not be noticed with the stab alone.
May 27, 2012, 09:48 PM
Callsign blocked
Brickyard's Avatar
Why does the Bandit have anhedral on it horizontal stabs? Maybe to keep them out of the wings disrupted air. Not sure how big the wind tunnel is, but perhaps the entire assembled aircraft should be put in.
May 27, 2012, 10:05 PM
Lee Liddle
Knife Liddle's Avatar
Quote:
Originally Posted by brickyard
why does the bandit have anhedral on it horizontal stabs? Maybe to keep them out of the wings disrupted air. Not sure how big the wind tunnel is, but perhaps the entire assembled aircraft should be put in.
+ 1


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