[AT] Texas AM wind tunnel changes motor after 70 yrs

Dean VP deanvp at att.net
Mon May 28 21:18:16 PDT 2012


Rob,

Really interesting.

Dean VP
Snohomish, WA

"Do not go where the path may lead; go instead where there is no path and leave a trail."
- Ralph Waldo Emerson

-----Original Message-----
From: at-bounces at lists.antique-tractor.com [mailto:at-bounces at lists.antique-tractor.com]
On Behalf Of Rob Wilson
Sent: Monday, May 28, 2012 6:59 PM
To: Antique tractor email discussion group
Subject: [AT] Texas AM wind tunnel changes motor after 70 yrs

Allis-Chalmers sure built some dependable pieces. 
Rob

http://phys.org/news/2012-05-tunnel-motor.html

Sample quote

A new motor has been installed in the Oran W. Nicks Low Speed Wind Tunnel, replacing a
900RPM, 1,000-horsepower synchronous motor from Allis-Chalmers that was surplused by the
U.S The old motor was in service at the Low Speed Wind Tunnel for 70 years. 
The new motor is a 3,000-horsepower induction motor with a variable frequency drive that
allows for spinning the motor anywhere from less than
100 RPM to 1,200 RPM. The motor and drive package were purchased from TECO/Westinghouse.
.....
The first spin of the prop demonstrated a remarkable decrease in vibrations and noise, as
well. Testers were able to stand in the tunnel at 30 mph and hold a normal conversation,
something that would have been impossible with the old motor. While it may not seem
incredibly important for wind tunnel aerodynamic testing, when you are testing bicycles
and riders or downhill skiers in the tunnel at very low speeds, it is critical.
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