ORIGINAL: MJD
ORIGINAL: jimmyjames213
if you arnt in a hurry i have had great luck with my gms engines (.47 .32 and the th .46). the .32 i have is very reliable and powerful. not to menton cheap. sometimes th will get the engines in earlier than expected, sometimes later. if you are just starting your build i would wait a little while and see if anything new comes out or the engines go on sale.
And they have sporadic carburetor problems and I would never use one on a multi. I would call that ''cheaping out'' at the risk of reliability. Not to insult the engines (or you
!), but this is known and I've been helping someone with one recently. Some have problems flowing enough fuel at WOT, others have leaks. Some have both (bonus). The rest of the engine seems great, runs like a bear. Pop a Perry carb on a pair and then I'd think about it.
With multis go with well-known engines with consistent properties. If you're trying to save money, build a single. Within reason of course, but I just mean you can't tolerate certain things with multis and should not force yourself to by gambling on engines.
MJD
i have good luck with mine, its on a combat plane where the fuel tank is three inches away from the engine....
as for the other comment about the os .40fp being the best .25 ever made..........so true. turns a big prop though (mine is throwing a APC 12X4 in the 10 grand range and not complaining to much)
ever thought about putting 4 storokes on the plane??? OS or magnum .30's? or magnum .52's if you can take the weight (16 oz)
could go saito and save more weight.....but it gets really expensive
btw the ax25 and ax.35 cost the same as the .25 and weights the same (.2 oz diff).