Rolls-Royce Archives
         « Prev  Box Series  Next »        

From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Brake test results for a Goshawk starter motor.

Identifier  ExFiles\Box 35\4\  scan 100
Date  2nd February 1922
  
MOTOR FORM 5.
A.3009. BRAKE TEST OF STARTER MOTOR.
Date:- 2-2-22
Motor under test:- Goshawk
Dia. of brake wheel - 10"
No:- 1
Weight of pan and portion of ropes = 5 lbs. 0 ozs.
Reduction gear ratio -

TABLE DATA:
Column Headers:
Load in pan (W) lbs.
Spring balance reading. (B) lbs. ozs.
Speed R.P.M.
Amps.
Volts.
W-B (lbs)
T-t (lbs)
Torque (lb-ins)
B.H.P.
E.H.P.
Efficiency.

Row 1: Speed R.P.M.: 1670, Amps.: 64.0, Volts.: 10.72, Torque (lb-ins): 20, B.H.P.: .58, E.H.P.: .92, Efficiency: .58
Row 2: Speed R.P.M.: 1350, Amps.: 82.0, Volts.: 10.36, Torque (lb-ins): 30, B.H.P.: .864, E.H.P.: 1.06, Efficiency: .60
Row 3: Speed R.P.M.: 1100, Amps.: 98.0, Volts.: 10.04, Torque (lb-ins): 40, B.H.P.: .70, E.H.P.: 1.31, Efficiency: .535
Row 4: Speed R.P.M.: 900, Amps.: 116.0, Volts.: 9.68, Torque (lb-ins): 50, B.H.P.: .715, E.H.P.: 1.50, Efficiency: .48
Row 5: Speed R.P.M.: 730, Amps.: 132.0, Volts.: 9.36, Torque (lb-ins): 60, B.H.P.: .695, E.H.P.: 1.66, Efficiency: .42
Row 6: Speed R.P.M.: 560, Amps.: 148.0, Volts.: 9.04, Torque (lb-ins): 70, B.H.P.: .62, E.H.P.: 1.79, Efficiency: .345
Row 7: Speed R.P.M.: 450, Amps.: 165.0, Volts.: 8.70, Torque (lb-ins): 80, B.H.P.: .57, E.H.P.: 1.92, Efficiency: .30

19-8-21.
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙