Go Back   Team-BHP > Under the Hood > Technical Stuff

Thread Tools Search this Thread
Old 12th February 2010, 11:57   #1
Senior - BHPian
Shan2nu's Avatar
Join Date: Feb 2004
Location: Hubli - Karnata
Posts: 5,525
Thanked: 76 Times
Default Magnetic Non Friction brakes, could it be the future?

Came across this magnetic braking system used on the "North American Eagle", a jet engined land speed vehicle.

Seems like a good substitue for regular friction brakes. Only concern is that the braking force is generated when there is movement between the magnetic and the aluminium plates and gets stronger as the speed increases (which means that unless the wheels moving, there wont be any braking force available and braking power reduces as the wheel rpm drops), tricky if you wanna stop on a slope or use threshold braking. It will prob need a small 2ndry friction brake for parking the car and im not sure how the threshold braking can be taken car of.

But it would be great to have non contact brakes like these in the future.


Last edited by Shan2nu : 12th February 2010 at 12:05.
Shan2nu is offline   Reply With Quote
Old 12th February 2010, 15:01   #2
Team-BHP Support
Rehaan's Avatar
Join Date: Feb 2004
Location: Bombay
Posts: 21,267
Thanked: 18,012 Times

Interesting stuff Shan!

Haven't ever seen anything like this before. However, magnetic Eddy currents are(were) also used elsewhere in automobile applications.

Speedometers needles were actually attached to an aluminum piece, and a spinning magnet (via the speedo cable) would spin near it.
From what you saw in the video - the faster the movement of the magnet, the greater the force - causing the spring loaded speedo needle to move further - denoting more speed.

More reading on this : HowStuffWorks "Eddy-Current Speedometer"

Originally Posted by Shan2nu View Post
....im not sure how the threshold braking can be taken car of.
This might be able to be controlled by the distance between the magnets and the spinning aluminum disc?

But as you mentioned - slow speed braking would be another issue!

Rehaan is offline   Reply With Quote
Old 12th February 2010, 15:11   #3
Senior - BHPian
asr245's Avatar
Join Date: Dec 2007
Location: Gurgaon
Posts: 1,107
Thanked: 312 Times

I actually saw this program on Discovery (or was it Nat Geo). I am under the impression that such brakes are already under use in railway locomotives. But on second thought I do hear wheel squealing when a train brakes so cant be these types of brakes? Or maybe they use both (magnetic at high speeds and dry at low speeds).
asr245 is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Clutch friction plate hub shaking: Root cause? dhanushs Technical Stuff 32 15th December 2015 20:13
Brakes - A few tips that could help VeyronSuperSprt Technical Stuff 35 2nd January 2015 19:50
Friction Modifier for LSD suman Technical Stuff 12 8th August 2014 14:21
New Fiesta 1.6S friction-like noise at around 1200rpm abhipuru16 Technical Stuff 8 18th December 2010 01:43
My first Non Non-Stop Travelogue! 3 States, 10 Days Vacation! pulsar56 Travelogues 73 31st May 2009 23:32

All times are GMT +5.5. The time now is 00:36.

Copyright 2000 - 2016, Team-BHP.com
Proudly powered by E2E Networks