Strasburg 7312 Markings

Tom Richards · **Joined:** Mon Aug 23, 2004 8:04 am **Posts:** 137

Among other markings on the side of Strasburg 7312's cab is "30%." I think this was related to valve timing in a discussion here a while back, but I can't find the thread. If it's valve timing, what, exactly does that mean? If not, what is the meaning? Thanks

sbhunterca · **Joined:** Sun Aug 22, 2004 7:58 am **Posts:** 728

Canadian National used % as a shorthand to indicate a steam locomotive's tractive effort.

30% = 30,000 pounds tractive effort.

I hope this helps!

Steve Hunter
Cardinal, Ontario

S. Wayne Eissele · **Joined:** Sat Aug 21, 2004 11:19 pm **Posts:** 37

30% x 1000lbs. tractive effort=30,000lbs.

Kelly Anderson · **Joined:** Tue Sep 14, 2004 7:52 am **Posts:** 2477

Newriver400 · **Posted:** Wed Aug 13, 2008 4:33 pm

Kelly Anderson wrote:

#89 has 26% on the side of the cab. I think it means that in CN paint with the centered headlight, the engine looks 26% as good as it did in its old Strasburg scheme.

I'd say that's about right...

Gary Gray · **Posted:** Wed Aug 13, 2008 4:58 pm

Kelly Anderson wrote:

#89 has 26% on the side of the cab. I think it means that in CN paint with the centered headlight, the engine looks 26% as good as it did in its old Strasburg scheme.

Amen

Dave Albright · **Posted:** Wed Aug 13, 2008 5:28 pm

Kelly Anderson wrote:

#89 has 26% on the side of the cab. I think it means that in CN paint with the centered headlight, the engine looks 26% as good as it did in its old Strasburg scheme.

You guys STILL bitter about that?

Pat Fahey · **Posted:** Wed Aug 13, 2008 8:11 pm

Hi All

Cab marking,,,Strasburg # 7312,,,according too Canadian National Steam Power

by Anthony Clegg & Ray Corley,,,,

The answer is this,,,O -15-c build Kingston,Ont, 1912,,cyl 20+26 driver 51"

boiler pressure # 200 psi,,,,35% in CN terms is referred too Haulage rating,,this

term is referred as a designation of maximum ( starting ) steam locomotive

tractive effort...hopefully this is the answer you are looking for,,,Pat

Tom Richards · **Joined:** Mon Aug 23, 2004 8:04 am **Posts:** 137

It's been down-rated? 35% to 30%?

Kelly Anderson · **Joined:** Tue Sep 14, 2004 7:52 am **Posts:** 2477