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by0ung(at)brigham.net
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 Posted: Thu Apr 05, 2007 7:42 am Post subject: power off climb |
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| Quote: | Can't resist asking -- you say "I rarely see a 800ft/minute power
off climb in my Kolb."??? -- Climb?
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I've been there and done that.... flying at about 6500 to 7000 ft along the
rocky mountains.... I hit a mountain wave that lasted for around 4 miles.
I noticed the altitude going up "fast" so I pulled the power and I was
still going up.... pulled in some flaps so I could really push the nose
over and by the time I got out of the wave I was holding 10,000 ft. Trying
to outguess my situation, I was probably in a 700 to 800 ft a min decent
configuration, had I been in calm air. But in reality was going up at 1000
ft/min. Making the wave 1700 to 1800 f/min. one of my worst fears at the
time is I would hit the down side of the wave and wish I had more space
between me and the ground. This was in a valley with the end shaping into
a bowl, and the wind blowing down the valley hit the end and had nowhere to
go but up. Very little turbulence,, just a very smooth ride to the sky.
Boyd
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jb92563
Joined: 23 Mar 2007
Posts: 314
Location: Southern California
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| Posted: Thu Apr 05, 2007 10:06 am Post subject: Re: power off climb |
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Welcome to the world of soaring mountain wave flight.
The best lift is on the front (upwind) side of the wave and is ussually marked by Lenticular clouds
There are also additional standing waves down wind of the Primary wave.....similar to the water going over a rock in a stream.
But beware the rotor, as with lift around 2,000 fpm up there must be the equivalent 2,000 fpm down and the potential for a real nasty rotor, so exit upwind of the wave or perpendicular and straight downwind quick as you can, at no more than Manuevering speed(Va).
The rotor has been know to roll biggish aircraft (DC-3) onto their backs in an instant when flying through rotor parallel to the leading edge of a wave.
Ray
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_________________
Ray
Kolb UltraStar (Cuyuna UL-202)
Moni MotorGlider
Schreder HP-11 Glider
Grob 109 Motorglider
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JetPilot
Joined: 10 Jan 2006
Posts: 1246
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Unfortunately, we dont get those to often here in Florida 