Have run my 3W 200 for 2 hours---Below are the RPM's---With my 45 Lbs Comp-arf Super Extra the best pull was with the Fuchs 33x12 turning 5250.

3W 200 B2 Engine RPM's with different props:----

1] Fuchs 34 x10 4900

2] 3W Wood 34 x10 5500

3] Fuchs 33 x12 5250

4]ZDZ 34 x12 6200

5]Mejzlik 3 blade 31 x 12 5700

6]3W Wood 34 x12 4750

7]Fuchs 32 x14 5050