Not sure anyone cares but...

After spending some time with the Saito 91, I realized that it really didn't quite fit the airplane. It would have stuck out of the front of the cowl by a centimeter or more, and although workable, it bothered me a bit. As a result, I ended up buying a Saito 72, which fit perfectly under the cowl (with a couple of small holes for the rocker arm covers). Although I broke the engine in with a 14x6 prop, it seemed to be a bit much for the engine at the field. For my initial flight, the plane seemed quite sluggish. I replaced the 14x6 prop with a 13x6, and the engine ran much better. I have a good deal of vertical pull now, but it still isn't quite unlimited. In any case, it's definitely a lot more fun to fly now, and you got to love that 4-stroke sound!

I am currently running 10% nitro fuel. I plan to try 15% nitro and install that 14x6 prop again or perhaps I'll try a 14x5 prop instead. In any case, I am much happier with the new engine. I'm not sure if I'll return the 91 yet or not. I have 30 days to return it (provided I don't actually use it first). I am thinking of keeping it around and perhaps installing it on the Extra without the cowl for those days when I want that extra umph!!

BTW, I just read that Saito is coming out with an 82 engine that has the same footprint of the 72 with 20% more horsepower. Ah well... if only I'd known that sooner.

Thanks again for the help.

Dave