Please Brett, tell us more!!!

Brett,

Let me say that I don't consider myself a novice, but neither am I a competitor. Just a fun flyer. I've read with interest your posts regarding the use of the OS .20 on Twister size planes. Without any personal experience on my part, I'll have to say it sounds good and I have to argee with you. Sounds like this would be great on the Twister, Banshee, Magician and all the planes in the 48" span range.

My question is, where is the best point in size to take advantage of the FP and LA .40's running in the same high RPM, low pitch mode? In line with your experience with the .20 and .25, one would expect the .40's should carry a lot bigger plane than they are normally seen used on. If you move up in size to the Nobler, Smoothie, Chipmunk, Oriental or any of the planes in the 50" to 54" span (I'm not good at remembering wing areas), one would think they are on the small end of the scale for the .40's, if their power is on a linear scale with the smaller engines. Going up to the Shark size plane, which originaly flew with a baffle .45, is this a stretch for the ABC .40? Heck, maybe a Magnum. I don't think I've ever seen smaller than a .46 on either of these planes and lots of people run .60's on 'em! So does the FP .40 make power on the level of a baffle .46, like the Super Tiger or is there a point where the size-RPM vs. power thing just doesn't work as well. At some level, does the old adage, there's no replacement for displacement hold true?

Right now I sitting here looking a a NIB MECOA .28 BB ABC that I've had ever since Randy first offered them. I'm thinking maybe a 10-4 APC on the ARF Nobler I've got. Gotta get a sprinkler venturi and NVA.

Oh yeah, in discussing this, I don't want to talk pipes. Just don't want to go there yet.

Thanks,

Herman,
I have a Webra 28 which Bob Hunt used on his published Tucker Special.
This engine produced plenty enough power for his Tucker even though it was "retimed" for a 4-2 run!
I do feel safe in saying that the Mecoa .28 should fly an ARF Nobler running high rpm/low pitch.
Bill <><

I have flown a Scared Kitten old timer with a C*x Conquest on a 8-3 Rev-up. This was a better than average Conquest mind you but I was running a small venture and 5% stunt fuel, as the piston and liner only had a few runs on them, I was turning about 22K on that prop and trust me there was NO problem in going straight up in a wing over! Of course that was a tad extreme but the Nobler would have reacted very favorable as well. I really wanted a 9-2 to slow the plane down a tad more but alas none was available at least at the time.

the LA40 hauls a 750 sq. 45 oz. plane just fine on 10% and 10/4-12/4 props. take a look at my webpage. http://home.earthlink.net/~philcartier. A 25 should easily haul a 600 in. plane. Of course, that is with no flaps. The extra drag of the flaps can really kill the performance.