Dan was more conservative with the throttle and eased it in this time.
He took about 8 seconds to reach 40% throttle where it probably
lifted off about one third down the runway. He held it for about 8 seconds
then eased it back to idle and landed.
If one pulls it straight back to idle one runs into an aerodynamic
brick wall due to that huge 84 inch prop and it drops out of
the sky. 5300 engine RPM. Full 650 HP power is 8000 engine RPM.
The gear box is 3:1 so that is 1766 prop RPM at 5300 engine RPM.
Full power the 84 inch prop is turning 2666.
I think the first hop surprised him a little when it jumped off the ground
in 2 seconds a couple of weeks ago.
This airplane is a whole new ball game in aircraft as it has a much
higher power
to weight ratio than ALL WW II prop driven fighters.
All the engine parameters were normal or way below. The cooling system
is still
working remarkable well. Oil from the drain backs is still leaking into
the turbo when it sits around for a week. We could fix that but it would
take a major change in the plumbing. Consequently it smokes like a chimney
on first start up.
We used a DB meter to measure the noise. A new world record there.
The most I ever recorded was 105 DB. This was 126 DB. For every 3 DB the
noise
level is doubled.
Here is the video of the hop and the data log from the Motec.
Dan is the only and first pilot/person in the world to fly a prop driven
aircraft with 1.5 pounds per HP power to weight ratio.
A fast car is about 10 pounds per HP. A Formula 1 race car
is about 2 pounds per HP.
The WW II Bearcat that holds the Time To Climb record at 91 seconds
to 10,000 feet had 2 pounds per HP.
If the rotary was invented first anybody showing up with a Rube GoldBerg
piston engine would be laughed out of town :-)
Paul Lamar
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