the guys on the b17 thread have got me fired up to try and use scale 4 bladed props on the B29. The question I have is for those who are flying the B29 1/12th scale with .91 4 strokes. Is it basically overpowered or under powered? can it stand the lose of power that 4 bladed props would bring? The book says the OS 91 takes a 14x8 and a 12.5x7, 3 blade, so would that be a 12.5x6, 4 blade? Inquiring minds wanna know. the scale prop if I were to stretch it that far would be 16.7".