Hi,

These gentlemen are correct about the .61FX. That engine will not turn sufficient RPMs to move a jet on a Byrojet fan. If you ask anyone on here whether or not they've seen it actually happen, I think you'll see what I mean. If you're gonna do a jet, go ahead and get yourself an O.S. .91 fan engine. If you take care of it, it will last you as long as you're in DF.