jbeech
rrAdvertiser
Location: Sanford, FL (Orlando area)
| You can't get there from here. Basically it depends on what you want to do.
Pitch is obvious, it sets the collective pitch range from negative to positive. I.e. a bigger number means more total throw. Aileron and Elevator is a little trickier, but only a little bit.
Start with the blades crossways to the model. All you have to do is use your pitch gage and holding the flybar level, input elevator (both directions) and measure the pitch change on the blades. You're gunning for a range of 11-14° total.
Next, rotate the main rotor blades until they are directly over the tailboom and repeat, but for aileron this tim. Once again measure the pitch. Once again you're gunning for a range of 11-14° total.
This works out to between 5.5-7° each way for aileron and elevator. It's a nice compromise between sport and agressive flight. Take it to 8° each way and things can be pretty zippy. Any more than this and you'll have to be very careful not to stall the blades at the bottom of a loop - it can be scary if you do because the model will continue to sink and the pucker factor gets pretty intense.
Remember, cyclic pitch is added to collective pitch and begining at 16° the blades begin to stall . . . and progress through a full stall around 23°. Consequently, coming out of a loop where you add full collective pitch of 11° because you're a little low and close to the ground, and if you have 8° degrees of cyclic pitch and thus, you're holding a lot of aft elevator pitch and suddenly you are in the 19° range, which is in the stalling area! Ergo, instant pucker loop. Sometimes, if you're unlucky or too low, all the way into the ground.
For this reason, asking folks what their values are is next to useless unless you also know exactly how far out the ball is on the servo arm. Also, whether any swash extenders are in place, or being used on the Hiller lever.
Basically, you need to measure your pitch change yourself. Fortunately it's easy!
John Beech - GM (and janitor)
Audacity Models |
