On the advice of my Chapter Tech Counselor I put a throttle stop on my
throttle control. The WOT stop is the full travel of the knob at the
instrument panel. The idle stop is a "B" nut on the control cable wire
where the wire emerges from the sheath at the carburetor. The "B" nut will
not allow the throttle control wire to retract past the idle point. The
bell crank arm on the butterfly shaft has two springs that actually hold the
shaft against the stops on the carb. The springs keep the bell crank arm
tracking the butterfly shaft during operation between idle and WOT. The
pressures on the carb butterfly shaft stops are limited by the tension of
these two springs. Now there is minimal chance of breaking the butterfly
shaft or the stops on the carb with ham-fisted operations in the excitement
of the moment. Plus I have a much smoother and more positive feel on the
throttle that I did not have before.
With all the mods (cg change, new gear legs, new trim control, unbalanced
elevator, new throttle, new oil cooler and ballast weights) I am treating
the next flight as a first flight. Relocating the flap handle or perhaps an
electric actuator is still on the "to do" list.
Sid Wood
Tri-gear KR-2 N6242
Mechanicsville, MD, USA
