Inboard braking system

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teammaverick
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Joined: Wed Jul 27, 2016 9:03 am

Inboard braking system

Post by teammaverick » Wed Jul 27, 2016 9:16 am

anyone knows how to design inboard braking system?

Facts Only
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Joined: Thu Jul 03, 2014 9:25 am

Re: Inboard braking system

Post by Facts Only » Wed Jul 27, 2016 10:49 am

Ken Tyrrell and Alfa Romeo definitely do.

Its a bit of an open question, do you mean do people know how to run a design process? Or do you want to know how to spec' them? Or do you want to know the different considerations from designing outboard brakes?
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Jersey Tom
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Re: Inboard braking system

Post by Jersey Tom » Wed Jul 27, 2016 1:24 pm

Same way you design an outboard one. You have a caliper, a rotor, and a way to transfer the braking torque to the wheel. Just in this case you need something like a drive shaft rather than more directly acting on the hub.
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teammaverick
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Joined: Wed Jul 27, 2016 9:03 am

Re: Inboard braking system

Post by teammaverick » Wed Jul 27, 2016 4:13 pm

in case of outboard braking we took torque at wheels to calculate braking torque but in case of inboard braking we apply brake at differential...so wht torque should be consider?and is there any factor needs to be consider for half shafts while designing?

rscsr
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Re: Inboard braking system

Post by rscsr » Wed Jul 27, 2016 5:56 pm

teammaverick wrote:in case of outboard braking we took torque at wheels to calculate braking torque but in case of inboard braking we apply brake at differential...so wht torque should be consider?and is there any factor needs to be consider for half shafts while designing?
The only real difference is that the braking torque has to go through the half shafts. So you design the brake with basically the same parameters and beef up everything between the brakes and the rim to accomodate the additional brake torque.

teammaverick
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Joined: Wed Jul 27, 2016 9:03 am

Re: Inboard braking system

Post by teammaverick » Thu Aug 11, 2016 7:44 pm

I have limited slip differential in my car.So where should i place brake disc on it?

J.A.W.
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Re: Inboard braking system

Post by J.A.W. » Fri Aug 12, 2016 12:59 am

teammaverick wrote:I have limited slip differential in my car.So where should i place brake disc on it?

FYI, check out the Jaguar XJS, which was in production for over 20 years.

It was originally produced with the Jag IRS inboard brake set-up, but for final production, adopted wheel hub brake location,
since the realization - everyday practicalities being worthwhile - over perceived design advantages, had finally dawned.
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PlatinumZealot
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Re: Inboard braking system

Post by PlatinumZealot » Thu Aug 18, 2016 5:16 pm

teammaverick wrote:in case of outboard braking we took torque at wheels to calculate braking torque but in case of inboard braking we apply brake at differential...so wht torque should be consider?and is there any factor needs to be consider for half shafts while designing?
The torques will be almost the same. The only thing that changes is the slight axis changes of the CV joints and the torsional rigidity of the shaft. So not much more additional braking torque is needed.

The reason why the brakes were no longer positioned inboard was aerodynamics. At least, that is what the narrator says in the Team Lotus documentary. With outboard brakes the frontal area of the brakes is nullified by the wheel itself. And also aero-effects of the wheel can be used to help brake cooling... and heat from the brakes can help to heat the tyres... so in other words the aerodynamic and thermodynamic benefits of outboard brakes outweigh the advantage of lighter unsprung weight of inboard brakes..
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