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).
Letter from the National Advisory Committee for Aeronautics discussing a report on exhaust-valve operation with leaded fuels and combustion chamber design.
Identifier | ExFiles\Box 173\2\ img283 | |
Date | 5th March 1934 | |
COPY. National Advisory Committee, for Aeronautics, Langley Memorial Laboratory Langley Field, Hampton, Va. 5th March, 1934. Mr. W. A.{Mr Adams} Robotham, New York Athletic Club, 7th Ave. and 59th St.{Capt. P. R. Strong}, New York City. Dear Mr. Robotham, I appreciate your kindness in permitting me to examine the copy of your report on exhaust-valve operation with leaded fuels. In regard to your comments on the disk form of combustion chamber as compared with the spherical or pent-roof form of combustion chamber, I believe that any inferiority of the disk form may be attributed to the decreased flow area obtained with the smaller exhaust valves. I would expect the larger exhaust valve to operate at a lower temperature because of the decreased time in which the exhaust gases are in contact with the exhaust valve. I believe that it is for this reason that Curtiss-Wright stresses the use of large exhaust valves which can be used with either a spherical or pent-roof form of combustion chamber. Yours very truly, (Sgd.) Carlton Kemper, Mechanical Engineer. | ||