12
       The Pilatus climbs at 4091 feet per minute
       and right now, with our Catto 3 blade prop, we are climbing
       at 5000 feet per minute with the blow off valve set to only
       60 inches of mercury.. Up to 80 inches is available.

       Craig Catto tells me with a 4 bladed version of our
       prop we can get 30% more thrust.

       Paul Lamar

   Hey Paul i was watching that video of the TTC run and had a few questions I see the tach fluctuating a little but more importantly I was wondering why when he pulls the throttle back and the rpms drop the oil pressure rises. If I am reading it correctly which I may not it seems to be in the low 60s in climb at high rpm and then as the rpm dropped it instantly rose with rpm reduction close to 90. What's your thoughts on that or was I looking at it wrong. Love the sound of it keep the videos coming.
   Thanks, Jacob Sturges

   Me too. I am still trying to figure that  out.

   The 4 gallon  oil tank is in there at an 45 angle. I suspect the oil pump
   is having trouble sucking oil. We are considering cutting it down
   and mounting it vertically  with the outlet closer to the intake on the pump.

   This was done before I came on board.

   Paul Lamar

Hey Paul,
That could be the reason for loss of oil pressure, we just put together a LSX turbo engine in a rear engine sandrail and put the oil tank in the nose for wieght balance,  it has a 128" wheel base so the hoses must be a 135" to 140" and we have not had any oil issues. The dry sump tech did have us run a huge oil line because of the length, so that might be worth looking into. If I remember from the images I don't see a belt drive so the TTC is probably gear driven, I don't know if you can change gears or slow the pump down somehow, maybe the guy who specd the dry sump speed  is not used to spinning +8k rpms and has it spinning too fast.  Keep me posted I'll be interested to see what you find out.

Thanks, Jacob Sturges

Do you spend any time on a 45 degree down slope?
Our sump is below the engine and your sump is above the engine.
I think we have AN-16 hose. The pump is direct drive and runs
at 8000 RPM.

Paul Lamar

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