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140 
I.A.E. Research Committee's Report
Page 82
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'THE Institution of Automobile I Engineers has issued the seventh annual report of the Automobile Research Committee.
In June, 1938, membership had risen to 281, and expenditure for the year ended in that month was £17,000, whilst the staff is now about 30.
Work on cylinder wear has been concentrated on (a) a study of cylinderliner and piston-ring materials, (b) the formation of an oil film on cylinder walls, (c) the phenomenon of gas blow-by and ring flutter.
As regards bearings, experience has B48 shown that the copper-lead type is apt to cause considerable journal wear, and tests have been carried out to study this in connection with various crankshaft materials.
Work on the cracking of white-instal bearings has been continued, and comprehensive experiments made on the effect of hot lubricating oils on the fatigue strength of bearing metals.
Further attention has been given to the matter of brake squeak, which is particularly elusive. Cold-room equipment has been installed to permit investigation of difficulties in starting petrol engines.
For testing gear durability, two new machines have been in use for a year. Trials have been made with gears running dry to compare the wear obtained with that occurring under lubrication conditions.
Wheel-impact experiments have also been carried out on a six-wheeler.
Other matters investigated have been body-panel drumming, heat transfer from brake drums to wheel rims, fatigue failure of crankshafts on oil engines, and the oxidation and gumming of lubricants.