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-   -   Extra 300 Wing Snap (https://www.rcuniverse.com/forum/3d-flying-82/262737-extra-300-wing-snap.html)

rcpete347 09-09-2002 12:07 AM

Extra 300 Wing Snap
 
Hi all I have a Goldberg Extra 300 which will not snap it's wing even at low low speeds, on the other hand I have a Ohio 84 inch Extra 300 which will snap violently at the same speed.
Both Extra's have the same airfoil ?
Any advice on how to correct this.
Thanks Rcpete

Tipover 09-09-2002 01:04 AM

Wing loading
 
My Ohio 84" Extra had a pretty hight wing loading with a gas engine. I thought the plane built way heavier than they said it should. Mine also snapped really well(or bad) depending on how you look at it :D . Landings were a thrill for sure. The snapping finally got the best of it on a dead stick landing. I think Ohio designed the plane with a very scale size(small) stab and elevator, the stab just did'nt seem to have enough control over the wings angle of attack.

Kevin

Masked Pilot 09-10-2002 04:52 AM

Extra 300 Wing Snap
 
Pete,
Careful for what you ask. "Snapping" can "take" your model
very quickly.
"If" you want to go in that direction: start (slowly)
increasing control deflection, and (slowly) begin to move the
C.G. to the rear.
You will need: aileron, rudder, and elevator at the same
time to snap. "purists" leave out the ailerons...
Too soon you will have a "snappppa-haaappy" model, that may
well get you into trouble on slow landing approaches, or,
especially "dead-stick" landings....
Regards, Masked Pilot (Robert)...........

rcpete347 09-10-2002 11:38 PM

Snap
 
Masked Pilot, please read the whole thread, I asked how to correct a unwanted snap, example the wing stalls,the plane falls to the ground, not what you want.
Thanks Rcpete

snotlocker 09-10-2002 11:55 PM

SNAPPY
 
Well , i read the thread like MASKED PILOT , and it sounded like you wanted a more lively airplane and i can relate with that, I myself like a snappy bird :D

C_Watkins 09-11-2002 12:09 AM

I have to admit...
 
I thought you were trying to get the Goldberg to snap, too.
Read your post back to yourself, and think of it from the point of view of aerobatics nuts :D

It's all just a matter of perspective.
To some of us, the non-snapping plane is the one that needs correction.

shmo46 09-11-2002 12:38 AM

Extra 300 Wing Snap
 
To reduce snapping try:

Spoileron mixing. Ailerons go up slightly when the elevator goes up (creates a little washout)

Reduce elevator travel.

Check wing for warps or flaws in the leading edge.

Try slightly nose heavy CG

If possible reduce weight


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