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

I think it would be fun to get hold of a Pilatus PC-21 airframe and
place the TTC Rotary engine and test the flight results heads up
against the Pratt & Whitney PT6A-68B turboprop engine in that
airframe.

George F. Curtis Jr.

It would have to be a four rotor turbo. I think the Pilatus engine is
well over 1500 HP and the empty weight is 5000 pounds. It probably
cost several million dollars.

Paul Lamar

It would definitely be a sweet comparison. 4 rotor for sure or even 6. Still super light and more affordable. The TTC is really a great testbed for future builds. Lessons learned as we've seen. Once all the nuances are really worked out it's going to create a market. Every detail and lesson learned is here so we could really start tomorrow
Kurt Emerson

If we made the rotary out of aluminum we would have a tail heavy weight
and balance problem. It being lighter than a 1500 HP Pt6.

Paul Lamar

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