Page 17 - Beep Beep December 2022

Roger Weeks writes...
Big shout out to Tony Slattery for helping locate the problem on my E91 BMW.
Returning from the dealership where I had just purchased our X3, the car started to make a banging sound at any speed above 90kph. At first I thought the tread had gone on one of the tyres but soon decided it must have been the centre bearing on the tail shaft as this is a known issue on older BMWs.
With the aid of Tony and his hoist, we soon discovered that the tail shaft was sound, and the culprit was in fact the engine splash shield which had come away from the front bumper and instead of sitting above the bumper was in fact sitting below causing it to catch the wind above 90kph and start flapping.
We soon had the shield back in its rightful place and a road test up to 120kph confirmed the problem had been fixed.
What happens in the shed – stays......
Yep, we have all heard it said more than once, but perhaps this page might encourage you to share just what is happening in your shed. It will almost always be car related, but maybe not – anything that just might be a little interesting in your shed to other club members. TS
John M has just finished restoring a lovely set of vintage scales – used for weighing the gold he will find when he starts metal detecting on his next trip away. Anne M is just pleased it’s not another restored “book press” – how lovely to have one of those...
Tony S has been researching the specifications, mechanics & formula for his 1947 MG Saloon with a view to improving the stopping of a single leading shoe setup. This has involved finding long forgotten formula to calculate pounds/force, psi and friction co-efficients. These cars had adequate brakes in 1947 with the tyres, speeds and road surfaces – but with smoother roads, higher speeds and soft rubber radial tyres they are really not up to scratch in 2022. The aim is to achieve a 1.0g deceleration under braking using this formula.....
Gross weight X g X effective diameter of tyre
F = ------------------------------------------------------------------------------------------ Mean coeff. Of friction brake lining X diameter of brake drum
2324lbs x 1.0 x 2.188ft
17,842lbf = ------------------------------------------------ 0.38 x 0.75ft
The standard brakes for a 1947 MG Saloon deliver 12,606lbf and only 0.7g, so now the research turns to find a reasonable, cost effective solution........stay tuned.
Any shed gossip to share ?
Send to Tony Slattery for his SHED GOSSIP! feature... theclassicworkshop67@gmail.com
17