That's a 9x7 3 blade prop.

I wanted MUCH more speed on my Bobcat .25 so yesterday I flew it with two 3S 3900mAh battery packs in series to produce 22 volts.

I swapped out the motor for an 893KV motor capable of taking 22volts.

I also tried a 9x6E prop on this setup.

This increased the weight of the plane by about 5-6oz, but it still is under the glow engine weight.

On the ground the motor cannot spin as fast as the ESC is pulsing it, causing the motor to make a screeching noise and STOP at high throttle.

However once it unloads in the air, it does just fine.

The plane is a small rocket this way and I like how it flies.

I will be testing it with the 9x7x3 prop too.

---

If you want speed w/o the expense get a .30 GMS engine and put it on this plane.

It will do very well with the GMS.