[modeleng] Re: Why is it so quiet?

I have always reamed my pump bores and used brass barrels with bronze 
plungers.  Works for me anyway.  There may be stainless plungers on the 
crosshead pumps on my American, but it is in the basement and I am upstairs, 
need I say more?

Jesse in West Tennessee


#1--What materials were used in full sized practice and WHY cannot the same 
material be used in our models?  I'm using ground Stainless in mine and if I 
have to replace it after several years, I can do that.

#2--WHY must the inside of a pump bore be lapped instead of just a good 
bored or reamed finish?  Isn't the rings/packing job to take up any small 
irregularities in the finish of the bore?

Just the rambling thoughts of a total newbie.

Al Messer

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