I am installing a Saito FA91S on a Sig Kadet Senior ARF. Has anyone installed a aluminum spinner on this combination that would swing a 14x7 APC. I am curious what would work and look right up against the plastic cowl of the plane.

Thanks,

PTS

The aluminum spinners generally don't have that little 1/8 inch flange around the back of the spinner. If you previously had a plastic spinner, you will find that your new aluminum spinner will have a much larger gap between the cowl and backplate.

I think a TruTurn or a Dave Brown about 1-3/4" would look great. Like Kingwood B said, it might have more of a gap between the backplate and cowl, but of course that depends on how much you had to start with. My question would be do you have enough ground clearance for the 14" prop? The .91 will turn it with no problem, I turn a 14-6 with a .65 Saito to about 9700 rpm on a different plane, but it's a tail dragger. That engine and prop combo on a Senior should be able to drag it and a couple of others around the field. The Senior isn't gonna fly that fast, might want to crank the pitch back to a -6 or -5, but you might be able to over-rev the engine. Just curious, but why a .91? That would fly two Seniors. A guy at our field put an .82 on his, and has to fly it at 1/4 throttle. Make a helluva towplane though.

Seniors make damn good tail draggers BTW, if you can revise the tail to include tailwheel steering. Mount the mains with the front of the gear leg (aluminum type) about an inch forward of the L.E. of the wing

I really have no idea why a .91. I was talked into it. What Saito and prop would work good on the Kadet Senior ARF.

Perry

Sounds like the old hot-rodder maxim--there's no replacement for cubic displacement. The Senior is designed to fly on a .46 2-stroke. My recommendation for plenty of power would be a .56 or .65 Saito (I love Saitos) or a comparable Magnum or OS and a 12-6 for the .56 or a 13-6 or -7 for the .65. You'll be surprised how little power the Senior will fly on. The smaller engines should balance well, and you'll save a few bucks on the engine, if you haven't already bought and run the .91.

I use a .56 on a Rascal 40, which is about the same weight as the Senior, has the same wingspan but a little less wing area, and it will do almost everything but hang on the prop. I use a .65 on a 9-1/2 pound 1/5 scale L-4 and it flies at 1/3 throttle. Plus the spinner you asked about earlier, you'll have a nice flying Kadet.