Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Laboratory test result on the foaming of various oils for use in shock absorbers.

Identifier  ExFiles\Box 28\1\  Scan118
Date  6th January 1928
  
R.R.A.794m 1m.11-26 55509
RESULT OF LABORATORY TEST
ROLLS-ROYCE
OF AMERICA, INC.
Test No.
Date January 6th, 1928.
Oils
Sheet #1

Foaming of Oils considered for use in Shock Absorbers.
About a 300 cc sample of each oil was beaten vigorously by a specially contrived paddle.
The stirring was done by the fatest speed available on a drilling machine.

Oils Used. First Indications. 5 min stirring 15 min. stirring Final Appearance Foam lasted
Mobiloil E Few bubbles formed in 1/2 minute foam gathered around edge for 1/4" Amount of foam decreased about 1/2 Foam 1/8" thick all over about 5 min.
80% Mobile E Larger bubbles formed than with Foam about 1/8" Almost stopped foaming 1/8" thick over all about 23 min.
20% Glycerine E in 1/2 min.
Lovejoy Fairly large bubbles formed at once Foam about 1/8" Increased to 1/4" wide Thin foam covering 1/2" surface About 7 min.
Mobile Arctic Very large bubbles formed at once Foam increased considerably Foams very badly Heavy Foam About 12 min.
Velvoline Lt. Few fine bubbles formed in 1/2 min. Foam about 1/8" No increase Slight foam About 5 min.
Lard Oil Few fine bubbles after 1 minute Few bubbles slight increase Thin layer of very fine bubbles About 4 min.
Castor Oil Few fine bubbles after 2 minutes Very fine bubbles but not at edge Fine foam increased White turbid solution cleared in 1-1/2 hrs
90% Castor Oil Few fine bubbles after 2 minutes Quite a few fine bubbles Much less # of bubbles Clear solution -few bubbles 10 minutes
10% denatured alcohol
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙