Originally posted by Russell Burrows
Thanks for the info Joe - fascinating stuff. So, was Bob a Dunlop user before the Triangular was developed? I wouldn't for a minute dispute Bob's claim, although I do know that others were less than impressed with them . I think it was Derek Minter who hoarded as much Avon rubber as he could, and I think also is on record as claiming that IOM lap times went down as a result of there being only the triangular available.
ps How did the Beveridge Park event go?
Yes, Bob did use Dunlop's before the Triangular. Bob was an excellent development rider and lots of companies used him to test their products. The Triangular tyre was one of those either you love it or hate it things. Some people swore by them on both Manx's and alike and also on smaller bikes (eg Greeves Silverstone's). Here is a quote from The Motor Cycle from 1962 describiung the first lap of the 1962 250cc TT which mentions the tyre:
“But between Ballacraine and Kirkmichael McIntyre had really buried his chin in the tank top and, in supremely determined style, swept past Hailwood and Phillis (both on Honda fours), and looked as if he would blast Minter (also Honda) clean off the Island before the end of the lap.
Bob must have felt very happy with his new Dunlop “triangular” rear tyre!
At Sulby Bridge, Derek knew he had a tiger on his tail and by Ramsey Mac was through – leader on the road as well as on corrected time. What a fabulous performance – and from a man who has been an established ace for almost 11 years!
By Keppel Gate Bob was well ahead of Derek, almost visibly faster. It seemed possible that he was about to set up a 100 mph lap from a standing start.
Head raised momentairily for a pit signal, Mac screamed along the Glencrutchery Road, followed 14s later by Minter; starting interval was 30s so that Mac was a comfortable 44s up.”
Beveridge was a good crack. Lots of old guys from Beveridge's past turned up and it was good to have a natter with them. It was a good event as many of the people who turned up would not normally come to race meetings. One of the highlights was seeing the KDMC's premier class trophy (used since just after the war), which has a huge amount of history. It was the trophy that would have been given to Jimmy Gutherie for setting the fastest lap in the German GP (which he crashed in and died from his injuries). The trophy ( a huge Bronze Mercury trophy on a marble base with German Nazi detals) was sent to Scotland after Gutherie's death and eventually made its way to the KDMC.
Here are a couple of shots of the Joe Potts stand:
A shot of the JP7 500cc Potts Manx which won at Beveridge Park in 1962 with Bob Mac. In the background is a 250cc Potts Manx and various Potts related engine parts (eg Desmo conversion, special cams, pistons and the development Ducat cams) :
Another shot showing a JP car another earlier 500cc Potts Manx and the Bruce Special (150cc New Imperial based motorcycle) plus Charlie Bruce's DOHC Velocette engine (initially made by Doug Beasley) :