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View Full Version : New QJ EP8 EX Setup info


Pinecone
02-13-2008, 05:18 PM
I was talking to Harold at Helicopter Hobbies today.

He was telling me they found a setup that really helps the pitch and roll. Apparently this reduces te elevator sensitivity in FF and makes the rolls more axial.

It turns out when they did the EX, they used some head parts (mainly for this, the washout arms) from a larger heli in the line. This ends up with the washout arm ratiso wrong and too much flybar pitch. With the stock setup, the flybar maxs out at about 33 degrees of motion, which is WAY too much.

So what you do, is move the balls on the washout arms in one hole. Now the washout arm isn't set up screw the balls in closer, so you have to make a spacer to fit the large lightening hole there. This mod also straightens the link angles.

See pic (from HH website).

The other thing, he is getting longer flybar arms made that will accomplish the same thing at the upper end. But they will be the stock single arms, so no help to those who upgraded to the flybar cage setup.

Pinecone
02-17-2008, 09:05 AM
OK played with this some yesterday. The problem is, the hole we want to use is a 3mm hole, and the stud on the ball is M3, so you can't screw it in. I was thinking JB Weld. :)

I tried making a standoff from Al tubing and using an extra ball from the mixing arms (put on the high pitch versions). I did drill and tap a piece of 3.16" x .049 wall tubing. But the mixing arm balls are too long and there will be nothing for the screw from the backside to thread into.

So I need a source of balls like the other head ones, but that are shorter, or a ball that is like the current washout arm ones, but instead of a stud has a M3 threaded hole. Or just a ball with a M3 thread in it (I might try to drill and tap a ball).

Or a ball like the stock washout arm ball, but with a longer threaded stud (5 - 6mm of thread).

Any ideas?