Going to Oshkosh:
25,000 ft
ISA +36 degF
2500 RPM
32 inHg
16.9 gph LOP
276 kts TAS (Chelton)
374 degF, #2 CHT
5.1 psi cabin pressure
In my limited IV-P time, I see about 3 kts per 1000 ft altitude increase. CHT’s at 18,000 ft are very low (345 degF) and CHT’s at 25,000 ft are as above when LOP. I don’t fly ROP except for climb. OAT significantly affects fuel flow and therefore speed when LOP. The IV-P is a fantastic traveling machine.
Craig Berland
N7VG
So today I was happy flying with my 4p going from Daytona to Raleigh and was wondering what cruise numbers you are using.
For example I was cruising with a MAP of 29, FF=16.7, 2500rpm and did 234kts at 17500ft.
The plane seemed to be very happy, temps were perfect, engine sounded happy.
So what are your numbers? LOP? ROP? Ron Stevens