mchargmg
Well Known Member
Hi all,
I fly a 180HP with CS prop 6A. I have always flown at high density altitudes. Our field elevation is 6800 ft, and we routinely see 10,000 ft DA in summer. So I have never really worried when I wanted to fly lean of peak up here. I just dial my mixture down and find the peak EGT and then go lean of that. I normally fly WOT at about 2350 RPM. At my altitudes I normally get about 21 inches of MP.
Recently I have been flying some pilots and paws flights (very fun!). These have been to Oklahoma and back, where the field elevation is about 1000 ft. I am seeing Manifold Pressures of 25 and 26, unheard of! I must be making 75% power or more.
I am a little worried about dialing the mixture down to look for the peak temps. Not sure if it is safe, even for a few seconds. So I just pulled the mixture to what I knew was lean, and flew at about the same speed I have before.
Any ideas? Is it ok to work through the EGT peak to find it? Any suggestions are appreciated.
Geoff
I fly a 180HP with CS prop 6A. I have always flown at high density altitudes. Our field elevation is 6800 ft, and we routinely see 10,000 ft DA in summer. So I have never really worried when I wanted to fly lean of peak up here. I just dial my mixture down and find the peak EGT and then go lean of that. I normally fly WOT at about 2350 RPM. At my altitudes I normally get about 21 inches of MP.
Recently I have been flying some pilots and paws flights (very fun!). These have been to Oklahoma and back, where the field elevation is about 1000 ft. I am seeing Manifold Pressures of 25 and 26, unheard of! I must be making 75% power or more.
I am a little worried about dialing the mixture down to look for the peak temps. Not sure if it is safe, even for a few seconds. So I just pulled the mixture to what I knew was lean, and flew at about the same speed I have before.
Any ideas? Is it ok to work through the EGT peak to find it? Any suggestions are appreciated.
Geoff
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