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).
Test report comparing pull and push forces of 'Packless Gland Co.' and 'Smith's Standard' calorstats at various temperatures.
| Identifier | ExFiles\Box 151\2\ scan0136 | |
| Date | 9th January 1934 | |
| 4698 9.1.34. "PACKLESS GLAND CO." CALORSTAT TESTS. E.80893. Made by "Packless Gland" Co. - As used on 1-B-4 during 10,000 miles trial. For comparison with Smith's Standard "H" Filling. Leverage 1.52:1 Temp. Pull-lb. Push oC. At Lever At Calorstat lb. Shutters "Closed" 16o 7¼ 11.0 30o 6¼ 9.5 Tests taken following 40o 4¼ 6.5 complaint that the 50o 3¼ 4.95 "Packless" type was more 60o 3¼ 4.95 "sluggish" than the 70o 1½ 2.28 "Smith" type. Wind 78o Changeover pressure tests to be taken 80o 2½ on chassis. The loads above 90o 29¼ to changeover are approx. 100o 55¼ the same for both types. Tests repeated with 1-L-III Packless type Calorstat - practically new. Ascending Temp. Descending Temp. Temp. Shutters "Closed" Shutters "Open" Shutters "Open" oC. Pull-lb. Push Pull-lb. Push Pull-lb. Push Lever Cal {Mr Calvert} 'st. {Capt. P. R. Strong} lb. Lever Cal {Mr Calvert} 'st. {Capt. P. R. Strong} lb. Lever Cal {Mr Calvert} 'st. {Capt. P. R. Strong} lb. 15o 5¼ 8.0 50¼ 76.5 20o 48¼ 74 30o 4¼ 6.45 48¼ 73.5 46¾ 71 40o 3¼ 4.95 46¼ 69 42¾ 65 50o 2¼ 3.42 43¼ 66 40¾ 62 60o 2 3.04 39¼ 59.5 36¾ 56 70o 1¼ 1.9 32¼ 49 27¾ 42.2 80o Change 78oC. 7½ 8¼ 12.5 Change 80oC. 90o 24¼ Change 84oC 11¼ 14¾ 95o 43¼ 98o 54¼ 100o 29¼ 29¼ Wt. of "Pull" Tray 1¼ lb., and of "Push" Tray ¾ lb. included in above figures. | ||