The Baker Fan

Claude P. Abbert
January/February 1975
Add to My MSN


Content Tools

Related Content

QVEA Old Iron Shows at Zagray Farm

The Quinebaug Valley Engineers Assn. (QVEA) thinks big when it comes to old iron shows.

Pro Tool Industries Launches New Website

Pro Tool Industries, maker of the iconic Woodmans Pal and J. Wayne Fears Brand products, recently an...

Fanning Mill Will Have to Rise From the Ashes

Gale Wollenberg is looking for more information in an attempt to restore his father’s old fanning mi...

Mid-Michigan Old Gas Tractor Association

Farm Collector and Gas Engine Magazine advertising executive Terri Keitel checks in from the Mid-Mic...

1961 West Side Drive, Rochester, New York 14624.

Retired Project Engineer in charge of air flow and pressure standards for the Taylor Instrument Cos. and author of 'The Engine Wasn't There', 'Of Engines, Governors and Nomenclature', and other articles.

THE BAKER FAN

The Baker Fan was developed by the Baker Co. as a load for running-in new engines and not as there seems to be a tendency to expound at the Reunions, as a device for the measurement of horsepower. There are two reasons why these fans are inadequate for such use. First, their performance is air density dependent, and second, the speed is relatively insensitive to the power input.

At higher elevations, the air is rarefied (less dense) and the fan spins more easily. Therefore, the power input to the fan would be less for the same rate of turning.

The normal air pressures at different altitudes are well known. From those values, I have calculated the change in air density with altitude and, in turn, the change in the amount of power required to drive the same fan at the same speed at three specific locations. If 50 horsepower were required to drive a fan at a particular speed at Rochester, N. Y. altitude (510 ft.), then only 48 horsepower would be needed drive the same fan at the same speed at Olean, N. Y. altitude (1438 ft.) and 40 horsepower would suffice at Denver, Col. altitude (5219 ft.).

Minor biasing of the performance of such fans is also caused by day-to-day fluctuations in barometric. These changes would generally be of the order of less than 3 percent either plus or minus from the norm.

That the fan is subject to the biasing effect of air density changes is only one of the shortcomings as an indicator of power input. The power consumption of such a fan varies (at least as a first approximation) as the cube of the rotational velocity. Expressed in non-mathematical terms, as a more powerful engine tends to turn the fan faster, the resistance of the fan to being turned increases sharply and the more powerful engine fails to turn it very much faster than a less powerful one.








Post a comment below.

 








SUBSCRIBE TO FARM COLLECTOR TODAY!
First Name: *
Last Name: *
Address: *
City: *
State/Province: *
Zip/Postal Code:*
Country:
Email:*
(* indicates a required item)
Canadian subs: 1 year, (includes postage & GST). Foreign subs: 1 year, . U.S. funds.
Canadian Subscribers - Click Here
Non US and Canadian Subscribers - Click Here

Farm Collector is a monthly magazine focusing on antique tractors and all kinds of antique farm equipment. If it's old and from the farm, we're interested in it!

Every month Farm Collector brings you:

  • Windmills to cream separators
  • Hog oilers to horse-drawn equipment
  • Implements to engines to farm toys

If it's old and from the farm, we're interested in it!

Save Even More Money with our SQUARE-DEAL Plan!

Pay now with a credit card and take advantage of our SQUARE-DEAL automatic renewal savings plan. You'll get 12 issues of Farm Collector for only $24.95 (USA only).

Or, Bill Me Later and send me one year of Farm Collector for just $29.95.