What pitch on Sensenich FP for O-320 -9A?

[the_other_dougreeves]

Sensenich recommends the 70CM 79" pitch for "standard", 78" for climb and 81 for cruise. What are folks seeing in the field?

I am thinking of going with a -9A with Superior XP-320 w/1 mag and 1 LSE mated to a 79", 80" or 81" 70CM. I'll give up some climb (already lots) for speed.

Anyone got real world data with the 70CM?

Thanks,
TODR

 

[vlittle]

Sensenich recommends the 70CM 79" pitch for "standard", 78" for climb and 81 for cruise. What are folks seeing in the field?

I am thinking of going with a -9A with Superior XP-320 w/1 mag and 1 LSE mated to a 79", 80" or 81" 70CM. I'll give up some climb (already lots) for speed.

Anyone got real world data with the 70CM?

Thanks,
TODR

I'm using the standard 79" pitch O-320 dual mags. Only problem is that I can redline the prop (2600 rpm) at any altitude below about 11000' d.a. That implies it's a bit underpropped. I see about 2270-2280 rpm on take-off and climb-out if that helps.

Vern