Composite brake blocks in winter?

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Composite brake blocks in winter?

Postby bengt » Sun Sep 17, 2017 6:34 am

Here in Sweden we since about 2001 have to change out cast iron brake blocks for composite blocks due to some Central European countries dont like the noise from freight trains pasing by their cities.
But the composite shoes cause problems as bad braking characteristics due to ice and also for overheating wheels. In Europe the braking force for freight cars is higher or much higher in relation to carriage weight than in America. Up to 90 % of car weight.
Are there any problems in America with composite blocks compared to cast iron blocks in winter and severe winter conditions?

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Re: Composite brake blocks in winter?

Postby Passenger » Wed Sep 20, 2017 9:47 am

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Re: Composite brake blocks in winter?

Postby DutchRailnut » Wed Sep 20, 2017 8:11 pm

ehh no , its a plastic composite. yes composite blocks have problem with catching snow/ice and suck at slow speeds because of that.
on passenger trains they solve that problem with snow brake a feature that keeps a little pressure on , so block stays against wheel at little force.
problem with that is slack adjusters do not cycle. the composite blocks also polish the wheel more than cast iron shoes did .

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