View single post by Helmut
 Posted: Tue Dec 19th, 2017 09:19 pm
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Joined: Sun Feb 17th, 2013
Location: Friedberg, Germany
Posts: 1045
Go and read paragraph 5 of RP25 out loud. Then, if you understand just a bit of dynamics, give a reason why that small centering force can compensate the drag of a e.g. Standard H0 coupler 

Regards, H.
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