Letter discussing discrepancies in helix angles and observations on gear manufacturing in Saginaw.
| Identifier | ExFiles\Box 173\4\ img142 | |
| Date | 26th November 1935 | |
| -3- we should say:- ∝ = Tan.⁻¹ Lead x Cos.β circumference. This explains some of the discrepancies we have found between our helix angles and those supplied us by America. Actually, of course, whatever their anlges are, ours are better. 26.11.35. I have to-day been to Saginaw itself and seen the gears in manufacture. I have got some prints of the worms, and as they show the peculiar form of the tooth, developed as a result of experience by themselves to enable the tight spot to be maintained, I enclose one of them. The roller has no crowning but is perfectly straight flanked with sharp corners. As I am anxious to catch the next boat with this, I will send the remainder in another letter. Da. {Bernard Day - Chassis Design} | ||
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).