I can can try and help. I remember reading earlier in this thread about guys losing rpm at full throttle. Search the thread and you should find them. In my experience, which consists of breaking and about 35 x 1-14minute flights in the airplane now, I can tell you that the difference between half-throttle and full throttle in the air is nothing. In fact I fly around the entire flight at 1/2-3/4th throttle When I give it full throttle in the air it does seem to lose rpm for me too.
it must just be the carb on these engines. I haven't let it bother me as it seems to run just fine at 1/2-3/4th.
what prop and rpm do you get at half-throttle? If you are running a 22x10 and getting 6500-6800 out of it at 1/2 to 3/4ths throttle then I'd be happy with that. Unless its really stumbling bad at full? Maybe upload us a video.
How can you tell cylinders 2 and 3 are misfiring?
15:1 to 20:1 is what the manual states so he's fine on oil.
Originally Posted by
Joe1199
Hi guys,
ive had my Saito for a few weeks but ran it for the first time today, this is my first radial and I'm looking for some reassurance!
i started with the low needle 8 turns out, high 4 turns, it started easily and I ran it between 3800-4300rpm for 1.2 litres of fuel (15:1), after this I began to try and lean out a little, I ended with a situation where the engine runs well up to about 1/2-2/3 throttle then at WOT the revs drop and it seems to lose power, the strange thing is the high speed needle seems to have little or no effect, the engine starts easily but seems to misfire a lot on cylinders #2 and #3
i know this isn't an obvious problem I'm just trying to be as cautious as possible with the engine and I've read a lot that "the low speed needle is dominant", does this mean using it to get rid of mid-high range running problems?
also I pulled out the plugs after 1 litre and #3 cylinder appears to have done no running, it was clean, is this normal for rich run in?
thanks
joe