Caramon13
Pattern Altitude
I got a question from a potential buyer the other day, not really sure how to answer it.
My plane had the #3 cylinder repaired last year as it had compressions in the low 40s. I've had a compression check done since the work was completed and everything looked good.
The plane is making power without issue, but the buyer was wondering why/if the repaired cylinder would last as long as the other three.
Some background:
As long as I've owned the plane (which has been SINCE the cylinder overhaul), #3 has ALWAYS been the hot cylinder. I had some baffles replaced on the engine and it's cooled down a bit, but it's not uncommon to see CHTs between 420 and 440 on my engine monitor. The only way to keep it really cool is to leave the mixture full rich until near target altitude and lean back in very small increments.
The last two oil analyses have also reported higher than average amounts of chrome, iron and nickel. I have Millenium cylinders, not Lycoming.
I just did an oil change yesterday (after about 25 hours of time), sample was sent off to Blackstone Labs so we'll see if things are any different probably in a few weeks.
Anyhow, appreciate any input. Thanks!
My plane had the #3 cylinder repaired last year as it had compressions in the low 40s. I've had a compression check done since the work was completed and everything looked good.
The plane is making power without issue, but the buyer was wondering why/if the repaired cylinder would last as long as the other three.
Some background:
As long as I've owned the plane (which has been SINCE the cylinder overhaul), #3 has ALWAYS been the hot cylinder. I had some baffles replaced on the engine and it's cooled down a bit, but it's not uncommon to see CHTs between 420 and 440 on my engine monitor. The only way to keep it really cool is to leave the mixture full rich until near target altitude and lean back in very small increments.
The last two oil analyses have also reported higher than average amounts of chrome, iron and nickel. I have Millenium cylinders, not Lycoming.
I just did an oil change yesterday (after about 25 hours of time), sample was sent off to Blackstone Labs so we'll see if things are any different probably in a few weeks.
Anyhow, appreciate any input. Thanks!