Phil Irving and the Vincent supercharged attempt in 1936 TT races....extracts from his little design note books....

As you may be aware I've had the use of some of the small notebooks Phil Irving used while he was in the UK in the 1930's and 40's especially at Velocette and Vincent....
This blog will concentrate on the special racing Vincent single engines in the mid 1930's while PEI was employed at Vincent.
Left click on the images to enlarge....

To get a bit of back ground we need to review some pages from PEI's Autobiography.....
Phil speaks of several engines with various designations....
STT27, STT28 and STT29...
They are supercharged Vincent 500 engines of the comet type....

Phil wrote this using his small notebooks for reference, but reading them reveals often more interesting information. Stuff because of the constraints of the final size of his autobiography meant much was left out.....
Like the visits to Donnington Park, lap times after carb.alterations, modifications etc...

The following is a photo from PEI's collection, noted as "1936 supercharged TT Vincent, ex Roy Harper photo..."