This page is an archived version of the page that described the Brooklyn Tool and Machine Company's Flight Test Division. The Brooklyn Tool and Machine Company has closed shop and these facilities are no longer available. For information regarding the Model 916 Stick Force Indicator please contact  on the web.

FACTS

JANUARY 1987

STICK FORCE INDICATOR

In order to accurately perform the stick force check for SAS, the FAC factory uses an indicator that is used by the FAA as a flight test standard.

Instrument Assembly:

Each unit includes a hand grip, force transmitting arm, cantilever spring, lever arm, dial indicator and mounting base for temporary attachment to the control stick, wheel, or throttle. The indicator pointer rotates 360 degrees for the full range specified. An additional feature is a maximum pointer, which remains at the highest pressure reading until reset manually. Each 0.001 inch input into the indicator corresponds approximately to one pound of force applied to the grip. A stop screw limits the deflection of the cantilever spring.

Calibration Test:

Calibration Test:

Each instrument is calibrated for its full range for both increasing and decreasing loads. The average spread in the corrections obtained at 9 or more equally spaced test points In the range to full load will not exceed 2% of the maximum scare reading. The Indication, increasing or decreasing, will at no point differ more than 2% of maximum scale readings from the true load, except at zero load where the indication will be within plus or minus one half percent of the maximum scale reading. The Instrument is calibrated in a horizontal position by suspending weights In a hanger arrangement hung over the center of the grip and reading the Instrument after tapping the mounting: account is taker of any shift in indication due to change from the normal vertical. A calibration chart is furnished with each instrument.

Flight Test

STICK FORCE INDICATOR

GRIP TYPE - MODEL 916

A hand-held force indicator that registers the amount of pressure needed to move an aircraft's stick, wheel or throttle, in flight or on the ground. It replaces cumbersome strain gages.

Used as a flight test standard by the Federal Aviation Agency and carries U. S. Army Aviation Part Number 6625NL133.

Intended for airplanes, helicopters or flight simulator controls, the instrument is available in four ranges, 0-30 lbs.. 0-5Olbs., 0-100 lbs., 0-200 lbs, designed to remain accurate within +/- 2%.

All units have a direct-reading dial with a maximum pointer which remains at the highest pressure reading until reset manually. A calibration chart is furnished with each instrument.

All steel parts are nickel plated and rustproof: aluminum parts are anodized.

The instrument is available in four ranges:

Model No.       Range (lbs.)

  916D          0-  30

  916A          0-  50

  916B          0-100

  916C          0-200

Instrument Assembly:

Each unit includes a hand grip, force transmitting arm, cantilever spring, lever arm, Federal dial indicator and mounting base for temporary attachment to the control stick, wheel or throttle. The indicator pointer rotates 3600 for the full range specified. A maximum pointer remains at the highest pressure reading until reset manually. Each 0.001 input into the indicator corresponds approximately to one pound of force applied to the grip. A stop screw limits the deflection of the cantilever spring.

Calibration Test:

Each instrument is calibrated for its full range for both increasing and decreasing loads. The average spread in the corrections obtained at 9 or more equally spaced test points in the range to full load will not exceed 2% of the maximum scale reading. The indication, increasing or decreasing, will at no point differ more than 20% of maximum scale readings from the true load, except at zero load where the indication will be within plus or minus one half percent of the maximum scale reading. The instrument is calibrated in a horizontal position by suspending weights in a hanger arrangement hung over the center of the grip and reading the instrument after tapping the mounting: account is taken of any shift in indication due to change from the normal vertical. A calibration chart is furnished with each instrument.

Finish: All steel parts are nickel plated and rustproof; aluminum parts are anodized.

Weight: 1.5 pounds

Meets National Bureau of Standards Specifications.

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Contact us at:

Brooklyn Tool & Machine Company, Inc. is now BTM Trading Company For information regarding the Model 916 Stick Force Indicator and other parts formerly manufactured by Brooklyn Tool and Machine Company, contact btmtrading on the web.