I set up the stooge and got 2 flights yesterday. It is surprising how much time it takes to get everything on a new plane set up and checked.
So, here is the challenge:
Neptune P-51B
52 ounces 54 ounces
Cardinal wing Similar area, but more volume
12-4 Pro Zinger 12-4 Xoar
9000 RPM 8850 - 9000 RPM
6+ sec. lap time 5.15 sec. lap time
Dang! I thought that I would get similar lap times. Not at all. If nothing else, I figured that the Neptune would fly a little faster. Nope!
The other difference is:
.281 venturi .305 venturi
5% nitro 7.5% nitro
So, today I'll be changing props and testing.
I think a 12-5 would be a little much, so I'm looking at:
12-4 Xoar
11.5 cut down from a 12-5 Pro Zinger
11-5 Xoar
11-5 Pro Zinger
11-6 RSM (from Dave R. who uses it on his Pathfinder)
Any prognostications from you prop wizards?
At 6+ second lap times the plane flew nicely and did most of the pattern. But at that lap time it slowed way too much on corners and got too dicey.
We'll see what happens today. By the way, it was stunt-heaven air yesterday!