Originally Posted by Russ McCutcheon
I talked to AX-O today about this and could not give him an answer, however the gear legs have no impact on the position of the crank flange regardless the engine type the mount is made to fit or the length of the legs so anyone who changed from conical to dynafocal or vice versa regardless the gear legs, how did the crank flange match up, did the spinner end up in the same place, if not then how much did it change?
I did this exact swap last year on my RV-4. Conical to Dynofocal. (both long gear legs)
The prop flange and spinner are in the same place within what I consider normal manufacturing tolerances. With the new dynofocal setup the prop flange was maybe 3/32" closer to the firewall. I did not change the cowling, although the new clearance to the spinner is less than what I would have liked. I am watching it closely, no rubbing so have not made a change.
It was a bigger job than I thought it would be. New baffling - not sure if that had to be done but mine was pretty beat up and ready for new.