I purchased my RCV nearly 3yrs ago for my TF Corsair and did send it to Otto K for the mods he recommended. The engine was then ran on a stand for 2 gal with no problems using a zinger 18x12 prop. Idle and transition were perfect. Engine sat in box for a year lubed up well while I finished the plane.

This past July I maidened the Corsair and RCV had two problems. First was an inconsistent idle ran OK at about 1900 rpms. Second was overheating so I kept the throttle at 1/2 and landed the plane.

I enlarged the exit area in the cowl so that's done. But the idle is still poor. Top end with the Zinger 18x12 is 5000 rpms and I richened it to 4900. the low end needle was set to factory ( 4 turns out with throttle closed). Here it would run good at mid with excellent transition. bring it down to idle and she would turn 1800 to 2000 rpms be inconsistent and die. Went both ways rich and lean from the base 4 turns out with poor results. She mostly died at idle unless we were at the extremes of rich or lean when we knew we went too far then made 1/8 adjustments back.

New OS F glow plug didn't help either. My thoughts were we needed to go rich from the factory setting but could never find the sweet spot. Several times we thought we had it Started right up at idle for about 30 sec. then full back to idle (1800 to 2000rpms) and she would die after 15 to 20 sec with the glow driver off.

I have not pulled the carb yet to disassemble. Any thoughts appreciated.

Pete

Sounds like your fuel is old

Interesting. Will give it a try.

Pete

Yes it was a fuel problem. Filled her up with Cool Power 15% and she started right up. Richened the low end needle by almost 1/2 turn and was able to get her to idle nicely at 1860 rpm's. Just a little rough that cleaned up when the glow driver was turned on as it's suppose to. Top end at 4800 rpms. Great transition as before. I let it sit at idle for 3 min then quickly went to full throttle with no hesitation.

Plan on taking her to the field on Sun and give it a go.

Thanks,
Pete

When the bevel gear between the engine crankshaft and the sleeve valve gets worn in, it will be real nice. Tell me about starting it. Did you start it by hand or with the Allen type hex driver? And if with a hex driver, were you using a DC electric drill or a model engine starter?

I have started this engine by hand several times. Place your finger on the exhaust and turn the prop until good and wet then light up the glow driver 1/4 throttle and it starts with 1 or 2 flips. I have also used a starter on the prop nut with no problem like any other engine. Never used the hex driver deal.

Pete

I sold mine after having it for a while and deciding I didn't need it.

He claims it readily starts by hand. That with an elctric drill, the socket head nut comes out when the engine starts.

Update[8D]

The RCV started up and was very reliable on the ground so up she went. Pleanty of power and all went well.

Looks like it's Cool Power 15%

Pete

GLAD you figured it out, before getting rid of your engine..EXCELLANT

Congradulations Pete!!!

What was your final weight?

Scott

Scott,

Thanks,

She came in at 10.5 lbs. My goal was to be about a pound less. I know where I overbuilt and feel like I could be under 10 lbs if I had to do it again.

Very smooth flyer with no bad habits even with the change in stab and wing incidence.

Pete