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Craig:
I have an IVP. Flying in the high teens, lean of peak, 17.5 gph, I get 260 - 265 KTAS, probably 20 KTAS slower than what Lancair advertises at FL240.
I did everything possible to make my plane as heavy and slow as possible, lots of options, including prop heat, thermal icing (Thermawing), air conditioning, and lead bricks.
Living in Seattle, I'm more than happy to give up some top end speed for a little protection from unanticipated ice. I avoid all potential ice situations, and sometimes it just flat hunts you down in an attempt to kill you.
My Thermawing has saved my bacon a couple of times. The ice peals up like potato chips then blows off. I have TKS spray for the windscreen. I don't make a habit of looking out too often, but it helps to be able to know when to flair on landing.
My landing theory is to fly down to about an inch off the ground, then just let it crash and roll out.
As far as range, I can easily hit Vegas (or Fresno) from Seattle non-stop. The limiting factor is not my plane or fuel, but my bladder. So I usually stop in Reno to practice my crash landings and to pee, if I'm not in a big ass hurry to get to Vegas and contribute to the local economy.
Cheers,
John Hafen
On Mar 2, 2011, at 6:31 PM, Craig Jimenez wrote:
If this is posted elsewhere, please point me to the data.
The Lancair site says a piston IV-P will do 330 mph (~286 KTAS) at FL240.
I'd be interested in what speed and fuel-flow you guys see at sustainable
power settings at various altitudes.
Most of you flying LOP? I'm going to the APS class this Friday in Ada.
How much speed do you lose equipping with the thermal or TKS icing products?
Although probably beyond my budget, I'd also be interested in similar data
for turbine-powered IVPs.
My typical flight is 720 nm Oklahoma City to Phoenix, MEA 13000',
prevailing westerlies, 1-2 people and 50 lb stuff. The Mooney M20J does
great on non-stop range and economy, but I'm evaluating options for going
a lot faster, and preferably with at least inadvertent ice equipment.
Currently thinking Mooney Rocket, P-Baron, IV, IVP...? Thoughts on
appropriate planes would be welcomed.
Craig
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