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).
Specifications sheet providing data for the Lincoln & Lincoln Zephyr.
| Identifier | ExFiles\Box 127\2\ scan0040 | |
| Date | 6th April 1937 | |
| COPY 1077 LINCOLN & LINCOLN ZEPHYR DATA. 6th April/37. Main bearing dia. Zephyr - length over block 25¼". Big End - 2⅛" dia width ¾" Bohn Aluminium Bearing. Con. Rod. Wts. Including Bearing Zephyr 1 lb 8½ ozs. Lincoln 2 lbs 5½ ozs. .300 Between valve seats on Zephyr. 1⅛" valve centres & cyl. bore Zephyr. ¾" Between closest adjacent bores. Casting wall thickness 3/16". Water between bores 5/16". Ex. Ports 1⅛" dia. Cyl. block cast by Campbell Wyatt, Muskegon. Block Wt. Fully machined 235-245 lbs. Honing carried out by 400 E.7. Stone. Boring by 550 R.P.M. Carballoy tool. Main bearings 4/10 thou. limit for parallel & alignment. Oil tube pushed in on small splines with 2 to 3 thou. interference. Block inserts parallel .004 interference fit. Rods. running clearance 1-2 Thous. Mains 1½ to 3 thous. | ||