ORIGINAL: BMatthews
Back in the day when RK or Kress or whoever it was made DF units for 049's they were intended solely for use with TeeDee's since they were the only engine at the time that made enough RPM to make the fan useable. Something to consider.
I believe that Kress are still in business. A couple of years back I bought a twin installation from them "because it existed". I was wondering about using a TD with it.
Alas, as with so many of my good ideas it remains an idea. I can't even remember where I stored the unit. Nice little toothed belts and wheels, must be useful for something!
old git - - - - aka John L.