DHC, Are you sure that arf is that heavy?? Now my corsair on this thread is actually only 20 pounds and is actually bigger than the P-47, the performance is more than enough. it is powered by the old 70 cc version. With the newer 77 cc version you would have solid performance up to 25 pounds but Invertmast is right, over 25 pounds the performance might not be satisfying. The other concern is the cowl size. Check before you buy!! I like that you want to do something different. An aquantance put a Moki 150 radial in a Hangar 9 Beast and everybody jumped all over him saying what a mistake it was and yet he is delighted with the performance. -Tom

PS They are referring to those aluminum tube standoffs. Build a balsa and ply box stand off that is rigid. Look at post #44 I have pictures of my installation using cherry standoffs painted grey with dope.