os .25 fsr for speed limit combat

[zekemccoy]

What setups have been successful?

It's mounted on a Psycho and not test flown, aiming for 75 mph.

Would an intake stack be suggested, or just leave open w/o stack/venturi?

Would there be cornering - fuel feed issues, without a taller intake?

Using bladder and remote needle.

[Kiwi]

;D My son and I have used a variety of intake restrictors, but you can't get by with wide open intakes when matched to wings smaller than 500 sq's - ours run 85-90 on 450 sq planes using APC 8-4's and mild fuel (10%), unless we choke 'em down. I have used the FP 35/40 CL restrictors with good success, though. Our ABC and ABN FSR's start in one flip, do hot restarts pretty well, and with the 8-4's, they hardly slow down at all in maneuvers. The older iron piston FSR's aren't nearly as friendly for fast pitting.

We've also used Tornado white 9-4's cut to 8" diameter, for Houston's worst windy conditions, so we don't have to swap props after a gust tosses us into the dirt. Those do cause our planes some losses of speed in maneuvers (I wouldn't want to bet on a natural Tornado white 8-4 retaining both blades at the FSRs' rpm's). Houston doesn't have a 75 limit, so we have slightly more freedom in choosing a restrictor for the 80 mph.