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John Bolding
Joined: 23 May 2006
Posts: 281
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 Posted: Wed Jul 22, 2009 10:19 am Post subject: VNE |
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VNE no problem, the cleaner you get the airplane the less fuel it takes to move it a given speed, and the greater the climb rate.
Both good things.
JB
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arno7452(at)bellsouth.net
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| Posted: Wed Jul 22, 2009 10:36 am Post subject: VNE |
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Hey JB,
My DAR doesn't like to fly beyond Vne. Just a tad under Vne at 50% throttle gets great mileage. A tad over Vne and the wings twist off is not great!
I will never intentionally exceed Vne. Hanging around the FBO you often hear stories about bold pilots and their exciting flights. I am perfectly satisfied flying by the rules.
My CH701 climbs out at about 1200 ft per sec. Plenty fast for plane built to Zenith specs.
Regards,
Ken
do not archive
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John Bolding
Joined: 23 May 2006
Posts: 281
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| Posted: Wed Jul 22, 2009 12:43 pm Post subject: VNE |
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Ken , I'm NOT talking about flying beyond VNE not a wise thing to twist the lions tail. What I'm saying is that cleanups/ drag reduction on ANY airplane have value beyond just top speed. Gilpin reduced his fuel consumption by a large margin and increased his climb rate at the same time. If you reduce the fuel flow at cruise by 20% (his was more I think) you also reduce the wear on the engine and your pocketbook when it's time to fill up the tanks and overhaul the engine.
Speed isn't everything, especially with the 701.
John
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dwilde(at)clearwire.net
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vgstol(at)bigpond.net.au
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| Posted: Wed Jul 22, 2009 1:25 pm Post subject: VNE |
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Vne is not an issue. Cruise speed is controlled by the hand on the throttle. 100hp is way over-powered for a 701 straight and level. The power is needed for the spectacular short take-off performance, but is way in excess for cruise. It's just like your car has heaps of power for quick acceleration and hills, but you don't keep driving at that power or you'll be way over Vne for the highway patrol...... Same in the 701, once you're up there, throttle back and cruise at a respectable speed.
And JohnB is exactly correct, without the drag of the slats you'll be running at lower engine power for the same speed, so less fuel consumption and less load on the engine.
JG
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On Thu, Jul 23, 2009 at 6:34 AM, John Bolding <jnbolding1(at)teleshare.net (jnbolding1(at)teleshare.net)> wrote:
[quote] Ken , I'm NOT talking about flying beyond VNE not a wise thing to twist the lions tail. What I'm saying is that cleanups/ drag reduction on ANY airplane have value beyond just top speed. Gilpin reduced his fuel consumption by a large margin and increased his climb rate at the same time. If you reduce the fuel flow at cruise by 20% (his was more I think) you also reduce the wear on the engine and your pocketbook when it's time to fill up the tanks and overhaul the engine.
Speed isn't everything, especially with the 701.
John
[quote] ---
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arno7452(at)bellsouth.net
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| Posted: Thu Jul 23, 2009 6:09 am Post subject: VNE |
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Ooops. Make that per minute.
Ken
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