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).
Road test results for engine cooling performance on a hill climb with varying release valve pressures.

Identifier  ExFiles\Box 24\4\  Scan263
Date  8th October 1924 guessed
  
contd :- -3-

ROAD TESTS.

Taken on 49-GB - standard engine - 4 to 1 compression ratio - standard fan and radiator.

Tests taken on hill - leading from Glossop to Chapel-en-le-Frith.

Car speed and load conditions kept the same for each test.
Atmospheric temperature remained constant to within 2°.

|------------------|----------|----------------------------|----------|----------|----------|
| | | Release valve set at - | | | |
| Conditions. | Standard | 2 lbs. | 3 lbs. | 4 lbs. | 5 lbs. |
| | mins.secs| mins. secs.| mins. secs.| mins. secs.| mins. |
|------------------|----------|------------|------------|------------|----------|
| Time before | 3 8 | 4 12 | 5 52 | 6 13 | ---- |
| water | 3 2 | 4 30 | 5 58 | 6 55 | ---- |
| commences | | | | | |
| to boil. | | | | | |
|------------------|----------|------------|------------|------------|----------|
| Amount of | | | | | |
| water lost | 3.5 pts. | 2.9 pts. | 1.9 pts. | .125 pts. | ---- |
| on hill. | 3.9 " | 3.1 " | 2.3 " | .3 " | ---- |
| Total time | | | | | |
| 7 mins. | | | | | |
| 15 secs. | | | | | |
|------------------|----------|------------|------------|------------|----------|


HS{Lord Ernest Hives - Chair}/ACL.
  
  


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