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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).
Test results for an S.U. Carburetter with standard and heated induction pipes.

Identifier  ExFiles\Box 31\4\  Scan035
Date  26th February 1923
  
S.U. CARBURETTER.

The following tests were carried out with a S.U. Carburetter, (variable jet) engine standard timing and standard induction pipe.

| R.P.M. | lbs. | pet/hr. pints. | B.H.P. | pet/HP/hr. pints. | Torque at 1ft. (lbs.ft.) | Brake M.E.P. lbs/sq.in |
|--------|-------|----------------|--------|-------------------|--------------------------|------------------------|
| 500 | 79.5 | 15.0 | 16.54 | 0.9067 | 172.2 | |
| 750 | 87.5 | 20.7 | 27.34 | 0.7574 | 189.3 | |
| 1000 | 90.25 | 28.0 | 37.60 | 0.7447 | 195.4 | |
| 1250 | 90.5 | 36.3 | 47.13 | 0.7702 | 196.0 | |
| 1500 | 90.5 | 43.1 | 56.56 | 0.7621 | 196.0 | |
| 1750 | 90.5 | 47.5 | 65.99 | 0.7197 | 196.0 | |
| 2000 | 89.0 | 52.0 | 74.16 | 0.7011 | 192.8 | |
| 2200 | 85.0 | 55.5 | 78.0 | 0.7115 | 184.1 | |
| 2400 | 84.0 | --- | 84.0 | ----- | 182.0 | |
| 2500 | 78.0 | --- | 81.2 | ----- | 169.0 | |

Following with Heated Induction Pipe.

| R.P.M. | lbs. | pet/hr. pints. |
|--------|-------|----------------|
| 500 | 77.5 | 14.5 |
| 750 | 86 | 20.2 |
| 1000 | 90.25 | 29.5 |
| 1250 | 93.0 | 37.0 |
| 1500 | 93.0 | 44.5 |
| 1750 | 90.0 | 49.5 |
| 2000 | 89 | 55 |
| 2200 | 86 | 59 |
| 2400 | 81.5 | --- |
| 2500 | 77.5 | --- |

A.{Mr Adams} C. Lovesey
  
  


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