Never Mind. Should have finished reading thread before asking questions.
Thanks Tony.
Steve Meyer
SOAR
LSF IV
At 11:36 AM 9/26/2006, Mark Drela wrote:
First of all, if the glider is being pulled level,
the winch doesn't see the weight, only the drag.
The drag is tiny compared to the winch's
Thanks Mark,
Along the similar topic/discussion; What type of airspeed is typical
right at ping of zoom? And also what would be a general figure to
determine velocity vs seconds of vertical climb? You could even use
Supra values.
Steve Meyer
SOAR
LSF IV
At 11:36 AM 9/26/2006, Mark Drela
g@airage.com
Sent: Tuesday, September 26, 2006 5:18:26 PM
Subject: Re: ***SPAMTAGPTD: [RCSE] Top end speed in MPH ! Math quiz
Rich, take a ball attach it to the line and time the time it takes to
travel the distance. Measure the distance then we can figure out feet/sec
The reason being that re
Rich, take a ball attach it to the line and time the time it takes to
travel the distance. Measure the distance then we can figure out feet/sec
The reason being that resistance and motor windings will make a
difference. Remember there are a few different motors out there.
And the new McCann winc
First of all, if the glider is being pulled level,
the winch doesn't see the weight, only the drag.
The drag is tiny compared to the winch's pull capability,
so it will be spinning at nearly its zero-load speed.
I think a typical Ford LS 6V has Kv=350 rpm/Volt,
so at 12 Volts it will be spinning
Here are some specifics for your word problem:
The McCann winches used at the AMA/LSF Nats and LSF WSM are 2 inch
cores on a 6 inch flange.
Winchline used is Memphis Net & Twine TWB-30, 290 pound test braided
nylon line.
Two spools of this line fill the winch drum almost to the 6 inch flange
l
Is this guy an engineer or what?
Jack Dubich
- Original Message -
From:
tony estep
To: soaring@airage.com
Sent: Tuesday, September 26, 2006 11:59
AM
Subject: Re: [RCSE] Top end speed in MPH
! Math quiz
Suppose
the winch is spinning at 2500 rpm. The
he plane gained 4 * 94 = 376 feet in the zoom.- Original Message From: RBurnoski <[EMAIL PROTECTED]>To: soaring@airage.comSent:
Tuesday, September 26, 2006 10:03:25 AMSubject: [RCSE] Top end speed in MPH ! Math quiz
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