Help! Master Series P51, prop size

[kinch]

I did a maiden flight on the MS P51 and it flew like it was way under powered. I used a C motor with a 10x4.5 prop that they sent with motor.
What size prop are you guys using?
Thinking of trying a 11x4.7SF

 

[w1lp33]

Which C motor? The old Emax 2215 or the new Radial motor? Were you flying on 3S or 4S?

 

[kinch]

new radial FT 2218-1180 V1 "C" pack
TATTU 2300 45C 4S
FT 35A ESC

I have been flying the FT 3D with the same motor, on 3S 2200mAh, 10x4.5 prop and it flies great.

 

[kinch]

It flew but would barely climb, can't do a loop.
Using CG 3" in front of the scoop (the part that touches the fuselage, not the part that would touch the ground).

 

[kinch]

weight is 764g without battery

 

[Timmy]

Is you're prop backwards? Probably not because it flies but worth a look I guess?

 

[kinch]

no, it was forward. I flew it twice for about 7 minutes. Broke the prop so not on right now.

Just curious what prop everyone is using.

 

[w1lp33]

Wierd. On my master mustang I fly the FT Radial with a 9x4.5 on a 4S 2200, and I've easily got enough power to do loops at half throttle. That's very strange that your's was so underpowered.

 

[kinch]

i am at a loss, weight is only 20g more than the plans say.

Wierd. On my master mustang I fly the FT Radial with a 9x4.5 on a 4S 2200, and I've easily got enough power to do loops at half throttle. That's very strange that your's was so underpowered.

...wait, you said 9x4.5, did you mean 10x4.5

 

[whackflyer]

Go to 4s. That's what FT flies all their MS planes on.

 

[kinch]

Go to 4s. That's what FT flies all their MS planes on.

I am using 4S 2300mAh 45C

 

[mrJv]

I maidened mine on 4S 2200mAh, 11x5 prop, 2628 1200kv Turnigy motor. Underpowered, level flight at 75% throttle, burned the motor after 5 minutes
But mine is about 1300g AUW... Very heavy foamboard
I am currently taking suggestions for a big enough motor