I'm extremely paranoid about having a proper engine break in so looking for some assistance on temps for my one and only taxi test. Truth be told I've done a number of engine starts, most less than 30 seconds. The two longest was a 3 min one and then today a 7 min one. I don't know if this is normal but these were needed to ensure everything that I corrected was indeed corrected.
I cowled her up today and am ready to do the official taxi test, let oil temp stabilize and do my full power run up and prop pitch test. Even though Barrett's did an hour on the test cell, and per the report seems to have been done with various setting per the Lycoming Service Instruction. Between the instruction and various other write ups I'm concerned about glazing my cylinders.
It will be somewhere between 55 - 60F out tomorrow, I'll plugged in my old 172 preheater for tomorrow. If I'm letting the oil get up to 140F, what is a reasonable CHT I should be looking for? I've seen various figures to keep them under ranging from 300 - 350F while staying on the ground.
For Prop pitch test I assume should RPM up to 1700, then slowly adjust the prop to get the new oil in and air out. Do I need to do 3 full cycles or is one recommended as I read some place else?
Finally for a full RPM run up. Is the goal to get to 2700, stay there for a few seconds and then throttle back to 1000? I'm going to use my brakes, but I'll be on the runway if they start dragging so I can throttle down and release the brakes. I did a high speed taxi test in my buddy's old RV-10, I could repeat what I did on his, but would prefer to try the brakes first.
Thanks!
I cowled her up today and am ready to do the official taxi test, let oil temp stabilize and do my full power run up and prop pitch test. Even though Barrett's did an hour on the test cell, and per the report seems to have been done with various setting per the Lycoming Service Instruction. Between the instruction and various other write ups I'm concerned about glazing my cylinders.
It will be somewhere between 55 - 60F out tomorrow, I'll plugged in my old 172 preheater for tomorrow. If I'm letting the oil get up to 140F, what is a reasonable CHT I should be looking for? I've seen various figures to keep them under ranging from 300 - 350F while staying on the ground.
For Prop pitch test I assume should RPM up to 1700, then slowly adjust the prop to get the new oil in and air out. Do I need to do 3 full cycles or is one recommended as I read some place else?
Finally for a full RPM run up. Is the goal to get to 2700, stay there for a few seconds and then throttle back to 1000? I'm going to use my brakes, but I'll be on the runway if they start dragging so I can throttle down and release the brakes. I did a high speed taxi test in my buddy's old RV-10, I could repeat what I did on his, but would prefer to try the brakes first.
Thanks!