danielabernath
Well Known Member
from vansairforce.com in 2011
beneditoangelo
12-29-2011, 01:58 PM
Can someone help me? I need to know RV 12 travel in degree of stabilator , flaperons and rudder. Thanks in advance.
12-29-2011, 02:35 PM
How in the world is a builder supposed to know that the airplane was rigged properly? I mean yeah I know that these kits 12 are incredibly complete, but I think checking control surface deflections should be a very basic part of making sure that everything came together properly in the end.
You won't get argument from me. I fought this issue for months. I need the information to be assured that the airplane is rigged properly, but Van's doesn't seem to think it's important. It's almost as if they are trying to hide something.
I can't think of any other aircraft designer in the U.S. that doesn't give this spec.
David Paule
12-29-2011, 02:50 PM
This is a good opportunity for several owners with flying RV-12s to tell us what their deflection limits are. With several we'd have a good feel for what the plane ought to have.
One owner said that his flaperon deflections were:
Flaps up: 22.5 deg. up and 11.5 deg. down.
Flaps down (20 deg.): Referenced to the flap down position of 20 deg. flaps, the aileron deflection from there is 19 deg. up and 9 deg. down.
It would be interesting to see what other owners report.
Dave
Peterk
12-30-2011, 01:33 PM
In the UK, my inspector also expected some control angle ranges to measure against, and some symmetry measurements. In the end we just measured them "for posterity".
Flaperons - up
Port up 21 degrees
Port down 13 degrees
Starboard up 24 degrees
Starboard down 12 degrees
Flaperons 1st stage down, droop 22 degrees
Port up 19 degrees
Port down 12 degrees
Starboard up 19 degrees
Starboard down 12 degrees
Flaperons 2nd sgae down, droop 32 degrees
Port up 18 degrees
Port down 11 degrees
Starboard up 18 degrees
Starboard down 11 degrees
Elevator
Up 17 degrees
Down 4 degrees
Elevator trimmer
Up 21 degrees
Down 32 degrees
Similarly, we measured airframe symmetry as follows:
Wing - rear wing tip to base of fin
Port 5000mm
Starboard 4995mm
Fin, top of spar to tail plan spar tips
Port 1705mm
Starboard 1705mm
Tailplane, tip of spar to centre of canopy handle
Port 3640mm
Starboard 3635mm
Undercarriage, main wheel to wing leading edge
Port 597mm
Starboard 603mm
Biggest difference was 6mm, that's a quarter of an inch!
Not saying this is right, wrong, or indifferent. Just what was measured.
Cheers...Keith
beneditoangelo
12-31-2011, 06:28 AM
Would it be safe to assume this was intended to state 14 degrees down for the elevator?
Stabilators typically don't use much down travel.
Most aircraft with stabilators have about 3? +/- 1? down.
pierre smith
12-31-2011, 07:37 AM
How do you find where the stab will be for level flight?
Only then can you assign up/down degrees, no?
Best,
Peterk
12-31-20