Table of specifications for various dynamo machines, continued from a previous page.
| Identifier | ExFiles\Box 36\4\ scan 004 | |
| Date | 6th August 1929 | |
| -2- DYNAMO TABLES (Contd.) | Machine. | C.A.V. N.C.E.R. | Lucas E.575. | Lucas A.400 | Bijur. | Liberty. | Smith T & M 3A. | Smith T & M A. {Mr Adams} | Smith T & M 2D. | R.P. 2-HP | |---|---|---|---|---|---|---|---|---|---| | Armature dimensions. | 3 5/8" dia.x 2 3/8" | 3.575" x 2.600" | (1) 4.50"x 3.15" (2) 4.50"x 3.00 | 3.6" x 2.85" | 2 9/32" x 2 1/4" | 3 3/16" x 2 1/4" | 3 3/16 x 3 11/16" | 3.15dia x 3.775 | 2.750 x 1.850" | | Com. dimen: | 1.90"x .78 | 2.0 x 1.650" | (1) 2.00"x .925" (2) 1.975 x .950" | 2.0 x .95 | 1 1/4" x 9/16" | 1.81 x 1.0" | 2.0" x 1.0" | 2.05" dia. x1.00" | 2.050 x .750 | | Brush contact area. | 1 x .60" x .25" = .150 sq." | 2 x .625 x .30" = .375 sq." | 1 x .75 x .5" = .375sq" | 1x.75x .275 =.206sq" | 1x.33 x.251 = .088sq" | 1 x .75 x.375 | 1x.75x .375 = .281 sq" | 1x .75 x.375 = .281 sq" | | | Armature resistance. | .46 ω | .44 ω .415 ω | (1) .409 ω (2) .395 ω | .435 ω | .404 ω | .618 ω | .685 ω | .61 ω | | | Air Gap. | -- | .019 | (1) .018 (2) .049 | .027 | .013 | - | .032 | .015 | | | Weight of armature without pulley. | | 10.25lbs | 13.5 lbs | 10.5 lbs | 3.0 lbs | lbs. | 9.5 lbs | | | | Grade and hardness of brushes. | C.A.V. C.O. Resembles A5.Morganite | C.M.9 Morganite | (1) A5 Morganite (2) Z CM4 Main IEG Control | Closely resembles A 5 Morganite. | Not marked. closely resembles C.M.3 Morganite. | C.M.6 Morganite | C.M.6 Morganite. | E.G.3 Morganite. | | | Weight of copper on armature. | | | | | | | | | | Vertical text on right side: R.R. ES QD (T) 8 S.L. No. 6-8-29 G 2409 | ||
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).