How come I can't find a 3D profile for my Saito 91. Seems like a great combination.

I have the saito91 on my KatanaP

The OMP 65" Yak54P claims to be 7lb. A Saito 91 will pull that fine. I am a little more power hungry, and will likely try the Saito 100 in that same airframe someday. Right now OMP only sells 65" Yak kits, but they claim to have an ARF version someday soon.

If you want high thrust:weight, get a 40 sized profile like tiktock. One of the columnists from RC Report claims to have a 91 in a CG Ex-treme 330. I have a 72 in the same plane, and it could use a little more power for my taste. If I were to do it again, I'd go with the 91 in it too. I must admit that my Ex-treme vibrates like a sumbich with the 72, though.

Hope this helps,
Kurt

The Saito .91 is a very light engine, only 20.5 ounces which is 3 ounces heavier than most .46's. I have 2 and have them on a Morris Hobbies Top Cap profile and a Goldberg Extreme 330. Both planes were slightly tail heavy with the .46 or the Saito .72 I originally had in them. The .91s fixed that and added a bunch of power.

I did have to widen the motor mount slightly and the engine sits all the way back. To give the carb air, I drilled a large hole through the profile and removed the foam for the tank in that area. The carb throat sits just about on the profile so I was concerned about breathing. On the TopCap, I added washers for some right thrust. The Extreme 330 has the right thrust built in.

I also changed to KrazyLegs, fiberglass/nylon landing gear. They are longer and don't take a set if you plop down hard like an aluminum gear can. I am using 15-4W APC props and needed the ground clearance. These are the same profile gear that are included in some OMC kits.

Drop me an e-mail and I'll send you some photos of my installation.

Well Ed, I guess you're the guy whose R/C Report column I was remembering.

thanks I order the OMP 65" Yak 54P yesterday. If the Saito 91 isn't strong enough then I'll guess I will have to buy another engine Actually the 100 looks like the perfect engine for this plane, but I'm not in the mood to shell out $300

Hey bbmass! I'm also considering that same combination and would love to hear how yours works. Let us know how the Yak performs with the 91!

One word: SLEDGE

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Gordo, for some reason, I knew that you'd show up here sooner or later!