Re: NNG - Oh Boy!! More Heisler Pics!!!

eric Wrote:
=======================================================
> I seem to remember 2.2:1 on the WH Eccles #3.
> Need to count the teeth on the pinion gear
> tomorrow when I am in the shop.

I have a Pickering Lbr. Corp. document that shows gearing for all 4
3T Heislers as being 12:24 or 2 to 1. 1 & 5 were 85 ton models, 2 is
a 75 ton model and the 10 is a 78 ton model. All are extant.

Getting back to the 90 ton 6 @ Cass. I am still scratching my head
trying to get a handle on just how Heisler could have claimed a t.e.
@ 85% bp of 49,410 lbs. with just a 20 lb. jump in pressure over
an 85 ton model and also having cylinders that were only 1/4" bigger
in bore. Driver size was the same at 40".

Even with Heisler's earlier figure of 43,610 lbs. t.e. at 75% bp, that's still greater than a 90-3 Shay with 40,400 lbs. If my math is right, the 90 ton Heisler has more cylinder volume than the 90-3 Shay which could partly explain the slidghly higher t.e. rating at 75%. But 49,410 lbs. at 85%? Wow! There was an outfit named Kosmos Tbr. in
WA State that went around picking up used examples of these and had
more than anyone. I don't have a roster, but they really filled a
niche there.

I would have liked to have seen a test report had one
ever been used on Pickering Lbr. Corp.'s lower end. I think a West
Coast Special would have been a big improvement in pulling and
economics over any of their exisiting non-Superheated Heislers.



Edited 4 time(s). Last edit at 04/17/2015 11:03AM by Tom Moungovan.