---------------------------------------------------------- Glasair-List Digest Archive --- Total Messages Posted Tue 06/13/06: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:08 AM - Re: EGT/CHT's (Craymondw@aol.com) 2. 02:10 PM - Re: EGT/CHT's (david michaud) ________________________________ Message 1 _____________________________________ Time: 09:08:35 AM PST US From: Craymondw@aol.com Subject: Re: Glasair-List: EGT/CHT's Hi, For the first 100 hours or so of running the engine, I borrowed a portable engine probe to monitor the cylinders and found them all to be close. After doing that, I installed only single probes on the hottest cylinder. Since the incident I have put another fifteen hours on the engine. At cruise the engine appears to be running smooth. But I find I have to make slight adjustments to the mixture and prop control. The idle appears to be rougher than usual, especially when I get it down around 1,100 RPM. I read an article about induction leaks. The article said that at 650/750 RPM an engine should only be pulling 10 inches of manifold pressure. Mine pulls 15 inches at 850 RPM and the engine wants to quit. When I manage to get it to 650 RPM the manifold pressure shoots up to 18/20 inches and just about quits. I am sure the low rpm mixture is set right. My return trip back from Washington was a white knuckle trip. To avoid building thunderstorms, I had to fly the whole return trip on top an over cast over the Blue Ridge Mountains all the way back to Atlanta. Just as I reached the Harris VOR Fight control advised that I land at the nearest airport because of thunderstorms and blinding heavy rain. "Blinding rain" rain was a first for me. Several aircraft were just circling out side the system and watching it on their storm scopes. I had to land because I only had a few gallons left in my main tank and my header had only 5 1/2 gallons. Chuck Raymond ________________________________ Message 2 _____________________________________ Time: 02:10:49 PM PST US From: david michaud Subject: Re: Glasair-List: EGT/CHT's --> Glasair-List message posted by: david michaud I have a Glasair III with composite prop at idle it has problems to run smoothly,do you have a composite prop also . Dave Craymondw@aol.com schrieb: > Hi, > For the first 100 hours or so of running the engine, I borrowed a > portable engine probe to monitor the cylinders and found them all to > be close. After doing that, I installed only single probes on the > hottest cylinder. > Since the incident I have put another fifteen hours on the engine. > At cruise the engine appears to be running smooth. But I find I have > to make slight adjustments to the mixture and prop control. The idle > appears to be rougher than usual, especially when I get it down around > 1,100 RPM. > I read an article about induction leaks. The article said that at > 650/750 RPM an engine should only be pulling 10 inches of manifold > pressure. Mine pulls 15 inches at 850 RPM and the engine wants to > quit. When I manage to get it to 650 RPM the manifold pressure shoots > up to 18/20 inches and just about quits. I am sure the low rpm mixture > is set right. > My return trip back from Washington was a white knuckle trip. To > avoid building thunderstorms, I had to fly the whole return trip on > top an over cast over the Blue Ridge Mountains all the way back to > Atlanta. Just as I reached the Harris VOR Fight control advised that > I land at the nearest airport because of thunderstorms and blinding > heavy rain. "Blinding rain" rain was a first for me. Several aircraft > were just circling out side the system and watching it on their storm > scopes. I had to land because I only had a few gallons left in my main > tank and my header had only 5 1/2 gallons. > > Chuck Raymond >