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Actually the real P-51s had 4 blade props. APC makes them as well as Graupner.

That's funny because all the pictures that I've seen of the real Miss America have 4-blade prop, and all P-51D Mustangs use 4-blade prop. Please do a Google search for "P-51 Miss America".

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THE P-51 was built for speed. If I were you I would get a 2 blade APC with a low diameter high pitch and a spinner to match from Tru-Turn. The 2 blades are the most efficient.

My P-51 YS110 powered currently turns an APC 14/12 at 9300.

I may try the "warbird" propeller. The APC 13/13N. What do you think Richard?

I checked the Saito website. Looks like maybe a 13/11 after break in.

A 3-bladed prop would look silly on the P-51D Mustang. Plus, you will be losing some speed. If you want speed, stick with a 2-blade prop. As for spinner, any 3.5" diameter parabolic spinner would work.

I would love to see those ARF pics with 3-bladed prop on the Mustang.