Rolls-Royce Archives
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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 an RR. Goshawk starter motor.

Identifier  ExFiles\Box 35\4\  scan 105
Date  27th February 1922
  
MOTOR FORM 5.
4
X. 3009 - BRAKE TEST OF STARTER MOTOR.
Date:- 27.2.22.
Motor under test:- RR. Goshawk.
Dia. of brake wheel:) 10"
No:- 4
Weight of pan and portion of rope = 4 lbs. 7 1/2 ozs.
Reduction gear ratio:- --
No: 22

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

Row 1: 12, 14 ozs, 520, 171.0, 8.58, 11 lbs 2 ozs, 16.0, 80.0, .66, 1.97, .335
Row 2: 10, 1 lbs 4 ozs, 680, 154.0, 8.92, 8 lbs 12 ozs, 13.63, 68.2, .74, 1.84, .402
Row 3: 8, 1 lbs 10 ozs, 876, 134.0, 9.32, 6 lbs 6 ozs, 11.25, 56.3, .78, 1.67, .467
Row 4: 6, 1 lbs 5 ozs, 1040, 120.0, 9.60, 4 lbs 11 ozs, 9.56, 47.8, .79, 1.54, .513
Row 5: 4, 1 lbs 2 ozs, 1270, 103.0, 9.94, 2 lbs 14 ozs, 7.75, 38.8, .78, 1.37, .569
Row 6: 2, 14 ozs, 1524, 87.0, 10.26, 1 lbs 2 ozs, 6.0, 30.0, .73, 1.20, .608
Row 7: 0, 11 ozs, 1892, 70.0, 10.60, -11 ozs, 4.19, 21.0, .63, 1.00, .630

Brushes 70 advanced
22.2.22.
  
  


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