David-aviator
Well Known Member
This morning the plan was -
Check CHT in an extended climb.
Check OT same situation.
Measure time to climb.
Carefully approach 200 KTAS on the way down.
With the OAT 78 - max CHT in the climb was 377 using EIS 4000 to measure it.
This engine cools well because it is NOT an IO360 angle valve 200+HP unit. It is a simple standard compression IO360 180 HP.
OT hit 175. I may have to cover the cooler a bit.
Time to climb was 8:23. Not too shabby and also not so good, but decent for this engine/Catto prop combination and no wheel pants. For sure any CS prop will beat it.
I used the GRT Sport EFIS TAS indicator to ease up to 200 knots on decent. The maneuver is always a bit tension filled but the airplane was solid the whole way and the speed advance was very gradual. I did not try any turns or abrupt stick action at that speed, just wanted to see if it was stable. It is. Note: Like most guys doing this stuff, I am no trained test pilot.
Van comments in his Landing the RV article some time back, what makes a difference is practice, practice, practice. He is absolutely right. With just 4.9 hours in the RV-8, i need lots more practice. I can get it on but I don't like the landings even if they don't bounce. I am flairing too high and need to go out and drive it closer to the grass or asphalt.
Check CHT in an extended climb.
Check OT same situation.
Measure time to climb.
Carefully approach 200 KTAS on the way down.
With the OAT 78 - max CHT in the climb was 377 using EIS 4000 to measure it.
This engine cools well because it is NOT an IO360 angle valve 200+HP unit. It is a simple standard compression IO360 180 HP.
OT hit 175. I may have to cover the cooler a bit.
Time to climb was 8:23. Not too shabby and also not so good, but decent for this engine/Catto prop combination and no wheel pants. For sure any CS prop will beat it.
I used the GRT Sport EFIS TAS indicator to ease up to 200 knots on decent. The maneuver is always a bit tension filled but the airplane was solid the whole way and the speed advance was very gradual. I did not try any turns or abrupt stick action at that speed, just wanted to see if it was stable. It is. Note: Like most guys doing this stuff, I am no trained test pilot.
Van comments in his Landing the RV article some time back, what makes a difference is practice, practice, practice. He is absolutely right. With just 4.9 hours in the RV-8, i need lots more practice. I can get it on but I don't like the landings even if they don't bounce. I am flairing too high and need to go out and drive it closer to the grass or asphalt.
