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).
Comparison table of pendulum lever movement and tube inclination measurements for various chassis setups.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 26 | |
| Date | 15th February 1927 | |
| Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} BY/HEB{H. Biraben}2/M.15.2.27. CHASSIS. | LINEAR MOVEMENT OF PENDULUM LEVER BALL PIN | INCLINATION OF TUBE IN ELEVATION (AT NORMAL POSITION) --- | --- | --- | ON FULL REBOUND. | ON MAX: BUMP. E.A.C.7. Original Tube. | .525 | .225 | 7 1/2° up towards front. Exp. arrangement tested. E.A.C.7. Shortened Pend: Lever. | .275 | .075 | 4 1/2° up towards front. Phantom. "B2" Series 9,5 Pend: Lever. | nil. | .150 | nil. Phantom. "C2" Series 11,000 Pend: Lever. | .150 | nil. | 1 1/4° up towards front. | ||