Those are great numbers, almost too good, right? But I have to say, the 4p is a great traveling machine, I was flying at 16500ft, MAP29, FF=22 (ROP), 2500RPM @ 250kts.
I really like flying the 4p, and in my little experiences with planes, in the 4p I am less tired that for example a cirrus or the velocity. The pressurization and AC together makes flying so much more fun.
== Ronald
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 |