RE: B-29 SUPERFORTRESS BUILD THREAD
You may want to look at the gas engine thread in regards to the prop on the DLE20. I can tell you a 3 blade 15x8 MAS puts quite a load on the DLE20, so even if you are swinging a small 4 blade, it may not have enough power. The DLE20 with a 16x8 has very good power, and a 17X8 is also pretty good, and one of the recommended sizes, so going off those two sizes, you might be able to find something similar. I use an APC for the 16X8 and XOAR for the 17. Good idle, and good top end. The 15X7x3 did work, but top end was a bit low, so it "might" work on this model.