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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).
Lap times and speeds for a 49-GB car during tests at Brooklands under various conditions.

Identifier  ExFiles\Box 29\3\  Scan081
Date  16th June 1920
  
EFC/AT. X788
X.788
TYRES CARRIED OUT AT BROOKLANDS WITH 49-GB CAR.
16. 6. 20.
RECEIVED
R.R. 199 (250) (SD676 2-7-17) M.P.14885

Test 1. Condition - Hood & screen up - cutout closed. Standard axle - 1/4" liners under cylinders.

Lap 1
Time: 2 m.{Mr Moon / Mr Moore} 34 s.
Speedometer. min. 62 max. at stop.

Lap 2
Time: 2 m.{Mr Moon / Mr Moore} 33.5 s.
Speedometer. min. 65 max. at stop.

Lap 3
Time: 2 m 33 s.
Speedometer. min. 66 max. at stop.

Average of three.
1/2 mile flying.
Time: 27 secs.
Speedometer: 65 Stop.
1/2 mile from 10 M.P.H.
Time: 44.5 secs.
Speedometer: 64 M.P.H.

Test 2. Condition. Hood down - screen up - cutout closed.

Lap 1
Time: 2 m 32 s.
Speedometer. min. 64 max. at stop.

Lap 2
Time: 2 m.{Mr Moon / Mr Moore} 32.5 s.
Speedometer. min. 63 max. at stop.

Lap 3
Time: 2 m.{Mr Moon / Mr Moore} 32.5 s.
Speedometer. min. 64 max. at stop.

Average fo three.
1/2 mile flying.
Time: 27 secs.
Speedometer: 69 Stop.
1/2 mile from 10 M.P.H.
Time: 44 secs.
Speedometer: 64 M.P.H.

Test 3. Condition. Hood & screen down - cutout closed.

Lap 1
Time: 2 m.{Mr Moon / Mr Moore} 26 s.
Speedometer. min. 63 max. at stop.

Lap 2
Time: 2 m.{Mr Moon / Mr Moore} 26.5 s
Speedometer. min. 63 max. at stop.

Lap 3
Time: 2 m 27 s.
Speedometer. min. 64 max. at stop.

average of three.
1/2 mile flying.
Time: 26 secs.
Speedometer: 74 Stop.
1/2 mile from 10 M.P.H.
Time: 43 secs.
Speedometer: 65 M.P.H.

Contd.
  
  


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