After 10+ hours in a Mooney with a vernier throttle, I have to say that I hate vernier throttles. I found the throttle very unsafe. On takeoff, it was difficult to feed throttle in for take-off power without glancing down thus it became difficult to keep the airplane on the runway.
Landing had the same problem. Pulling the power to idle right before or at touchdown was difficult and the airplane would sometimes get pointed sideways. If the instructor asked for a go around on short final or right before touching down, that also was next to impossible to do without touching the runway or adding power in at the proper increase rate.
Has anyone installed and tried the vernier throttle from McFarland? I don't like the idea of the weaker springs.
Regards,
Rafael
RV=8A flying and for sale
Rv-12 5 hours completed
I flew Jetguy's 12 with the MacFarlane and loved it. I have one to install on my 756TS plane, but standing between the wing and a whirling prop in my old age unsteady stance worries me. I can see no reason that I cannot measure the opening with a precision caliper, then adjust to repeat the previous measurements. Am I just doing wishful thinking, or is this feasible?
I flew Jetguy's 12 with the MacFarlane and loved it. I have one to install on my 756TS plane, but standing between the wing and a whirling prop in my old age unsteady stance worries me. I can see no reason that I cannot measure the opening with a precision caliper, then adjust to repeat the previous measurements. Am I just doing wishful thinking, or is this feasible?
Don, you do not need to make adjustments with the engine running. Get someone to help you. You stay in the cockpit and take the readings on the Carbmate or the instrument of your choice, then shut down and have your helper make very small adjustments to the throttle lingages, and repeat the process. A few iterations and you are done!
BTW, have you made any progress with your medical/training issues?
There is, but that's not all there is to it. The length and placement of the cable sheath will make a difference. You could be spot on at idle and totally off at higher RPMs. When I installed mine we were fairly close right off the bat, but not close enough to go flying. The adjustment gave us fits, but that turned out to be a simple air leak. When I wrapped zip-ties around the hose connections for the Carb Mate and cinched everything down TIGHT the adjustments were a snap.I suppose there is not a good place to get a measurement.
I don't think I was quite clear. Obviously the idle adjustment will not be touched, no need to. As shown in the photo, if the arms are each put back EXACTLY in the position thy were when I started, then it absolutely has to be exactly as balanced as when I started. I plan to take the measurements here on each carb, then duplicate it with the new cables. I think I will file a small groove in the top of the throttle arm for a reference point to measure from.
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