Brass track/DC users ONLY--Update on ideas.

[ATLANTIC CENTRAL]

Milepost 266.2

Where's the thread for horn hook couplers?  

I never used them - I was using Kadee and dummy knuckles before before horn hooks even came along,

Sheldon

[csxns]

Where is the thread for plastic wheels?

[blownout cylinder]

Where is the thread located for pancake motors?

[Texas Zepher]

ef3 yellowjacket

One consideration in brass's favour is that there is less resistance with brass rail than with nickel-silver, which is not silver at all, but an alloy.  Technically, silver is the best conductor of electron flow.  It is, however, subject to oxidation; hence it's limited use.

I would say there are other bigger factors that limit the use of real silver:  cost and durability.  Silver is a real soft metal, depending on the compound it would wear down really quickly.