Can an operator [relatively] easily hand prop a PPonk 470-50 , AKA O-520 with 7.5:1 pistons? Bear with me, as I imagine some readers might consider this a crazy question.
As I'm at around 1,500 hours on my 470R, I've begun to plan for the next engine. I believe it's going to be a PPonk done with a 520 case and 7.5 pistons (lower compression). I have had to hand prop big engines before to keep from spending the night in the boonies, so expect the same could happen in the future.
I don't know what the piston compression is on the 9-cylinder P&W R-985 on a Beaver, but I've hand propped those numerous times without crazy amounts of difficulty. So, how about the PPonk?
Thanks,
Johnny
As I'm at around 1,500 hours on my 470R, I've begun to plan for the next engine. I believe it's going to be a PPonk done with a 520 case and 7.5 pistons (lower compression). I have had to hand prop big engines before to keep from spending the night in the boonies, so expect the same could happen in the future.
I don't know what the piston compression is on the 9-cylinder P&W R-985 on a Beaver, but I've hand propped those numerous times without crazy amounts of difficulty. So, how about the PPonk?
Thanks,
Johnny