I got an 84" Ivo "wide". You adjust pitch by turning one giant bolt in the hub. Cool mechanism. SUPER EASY to change pitch, and it is balanced by the nature of the design.
I'm told you can pitch this prop up to 90 inches of pitch. :shock:
84" three blade. Came off a caddy 1.7:1 belt drive. With that much pitch available - it may work for DD but I'm not sure about that.
Of course - I took it off the boat because I did not like it. Kinda hard for me to sell something to another airboater with that thought in mind. It's cheaper than a new composite prop though.
PM me if you want to talk price.
matt.