FREE NEWSLETTER

AP Racing continues with Bloodhound braking support

26 June 2019

Nothing on the Bloodhound LSR is normal – and the design brief for the disc brakes is no exception.

Its primary high-speed braking systems are the air brakes and parachutes, the disc brakes only used at the very end of each high-speed run to stop the vehicle as the heat energy created above 200 mph (320 km/h) is too high. Indeed, one of the reasons driver Andy Green has a speedometer in the car is to ensure he doesn’t apply them too early. However, while he won’t use them above 200 mph, they still need to be capable of coping with the maximum vehicle speed, meaning they have to withstand spinning up to around 10,500 rpm.

During the Newquay test runs in 2017, the car was fitted with carbon/carbon brakes on all four wheels. This was because the car only had a relatively short distance in which to achieve full engine reheat and then stop. The demand on the disc brakes in the desert is actually much lower, which means they have already had their hardest test – and passed!

Earlier in June the new owner of the Bloodhound project Ian Warhurst, who is also managing director of Melett, a supplier of replacement turbocharger repair kits for the automotive industry, met with David Hamblin, AP Racing’s managing director, and Richard Gregory, head of sales, to confirm AP Racing’s commitment to the Bloodhound LSR project.

AP Racing, which designed and supplied the brakes, is now looking at the design requirements for the high-speed test and record runs. The criteria are very different. For a start, rear brakes will not be used. Also, initial calculations, plus previous testing carried out on carbon discs, suggest that the wheels will exceed the maximum spin speed for the carbon material, so this means using steel discs.

As rear brakes are no longer needed, this allows for two spare carbon discs that can be tested as part of AP Racing’s engineering review to discover the maximum spin speed they can withstand and their breaking point. Previous tests were carried out using F16 and Typhoon brake discs. These were solid whereas the carbon racing discs that were used at Newquay were vented.

In addition to the redesign of the discs and pads, AP Racing is also giving the callipers a full service. The braking system had to work extremely hard during the 10 high-speed runs at Newquay, slowing the 5-tonne vehicle from 200 mph to zero as quickly as possible. Before the car heads to the desert, they will be fully inspected, serviced and reconditioned or replaced as necessary. This involves removal of the front suspension as the rear half of the calliper is actually machined into the uprights to save space – but that’s okay as they were being taken off for other work anyway.

Partners

Latest issue

FREE Newsletter

Stay up to date and a chance to win 1 Years Subscription*

  • This field is for validation purposes and should be left unchanged.

Latest Tweets

Stay up to date with our social world

RACE TECH magazine @RaceTechmag
23 Jul
Sign up to our newsletter to get a FREE digital issue and stay up to date with the latest industry news, reviews an… https://t.co/fXceofLzbL
RACE TECH magazine @RaceTechmag
23 Jul
Sign up to our newsletter to get a FREE digital issue and stay up to date with the latest industry news, reviews an… https://t.co/JeD071A4x3
RACE TECH magazine @RaceTechmag
23 Jul
F1 plays its trump card with new car, new culture - https://t.co/sGDYqqi0wg https://t.co/pcRR7BbJ8D
RACE TECH magazine @RaceTechmag
22 Jul
Mugello tops new sustainability index - https://t.co/Jm7dnrQ4Gx https://t.co/TElJU3g2gx
RACE TECH magazine @RaceTechmag
21 Jul
Latest issue out now! ✅ MONSTERS ON A MISSION: the @fia mission to transform the road haulage industry through… https://t.co/sV8FTVIRoy
RACE TECH magazine @RaceTechmag
17 Jul
August issue is out now & FREE online here for a limited time only! https://t.co/zA57JXXBs0 @F1 clamp down on flexi… https://t.co/zwOiSCOpTZ
RACE TECH magazine @RaceTechmag
17 Jul
RACE TECH magazine @RaceTechmag
16 Jul
As @F1 introduces new measures to clamp down on teams running flexible wings, we quiz our Expert Witness on a subje… https://t.co/XWbsjQMOs8