Search found 338 matches

by B&OBob
Tue Jan 15, 2019 11:04 pm
Forum: Live Steam
Topic: Train To Everywhere
Replies: 2
Views: 776

Re: Train To Everywhere

Thanks for the link, Dan. However, while this is an impressive video record of the 1978 run, it's disappointing that the C&O was so anxious to promote their railroad they thought it necessary to decorate that historic BLACK Reading locomotive with yellow paint.

B&OBob
by B&OBob
Thu Dec 27, 2018 10:58 pm
Forum: Live Steam
Topic: HOW TO LOCATE J HAROLD GEISSEL
Replies: 7
Views: 971

Re: HOW TO LOCATE J HAROLD GEISSEL

A comprehensive biography of Harold Geissel was published in The PLS Gazette , in two parts beginning Nov/Dec 2011 http://www.palivesteamers.org/pubs/gazette/2011_11-12.pdf and continuing in the next edition, Jan/Feb 2012. I was priveledged to know him and travel with him and other PLS members on so...
by B&OBob
Sat Dec 08, 2018 1:16 pm
Forum: Live Steam
Topic: Coal dust bricks again
Replies: 37
Views: 4116

Re: Coal dust bricks again

QUESTION: Considering the cost of coal and the finite limit on life, which is more important, pasting pieces of coal dust together or making something new and worthwhile in your shop? Only asking.
B&OBob
by B&OBob
Sun Dec 02, 2018 10:14 am
Forum: Live Steam
Topic: Engine Tear down-Boiler removal-7 1/4 George the Vth
Replies: 16
Views: 2691

Re: Engine Tear down-Boiler removal-7 1/4 George the Vth

By all means save the hardware in such a way that you can match nuts and bolts to their original location when youi reassemble the engine. British locomotives of your KGV's era used bolts with BA (British Association) threads and usually had oversize hex heads. They are numbered from BA 2 (largest) ...
by B&OBob
Sat Dec 01, 2018 12:25 pm
Forum: Live Steam
Topic: Found 1899 indicator card in a library book
Replies: 10
Views: 1569

Re: Found 1899 indicator card in a library book

Interesting! It appears the user intended to calculate IHP based on manual measurement of incremental areas under the curve, rather than using a planimiter. That's a little surprising in the Corliss era, but maybe the expense of a mechanical integrator was too great for their budgret. It is also a f...
by B&OBob
Thu Nov 08, 2018 8:42 pm
Forum: Live Steam Marketplace
Topic: PENNSYLVANIA K4 FOR SALE
Replies: 5
Views: 1990

Re: PENNSYLVANIA K4 FOR SALE

Dave -- Sorry to see your masterpiece popssibly leave PLS metals. At least we can still watch your many YouTube videos that feature the magnificant 1361, its impressive (and comfortable) train, and your successful air brake system! All who know it will shed a tear with you to see it go.

B&OBob
by B&OBob
Sat Nov 03, 2018 8:18 pm
Forum: Live Steam
Topic: Pre heating boiler water
Replies: 38
Views: 4517

Re: Pre heating boiler water

Kimball: I always used hot water to fill Mamod engine boilers to greatly shorten time rerquired to raise steam and lengthen run time on each meths fill. And at PLS we had an electric tea kettle in the storage building adjacent to our outdoor Ga1 track for use in cold weather to preheat water for sho...
by B&OBob
Thu Nov 01, 2018 9:08 pm
Forum: Live Steam
Topic: Pre heating boiler water
Replies: 38
Views: 4517

Re: Pre heating boiler water

Thanks for the photo, Bill! George Thomas, my father, built a free lance 4.75" 2-4-0 in 1966 that incorporated the smokebox feedwater heater shown in Bill's photo. The pre-heater consisted of the six or seven tubes about 4" long between two headers on the left side of the smokebox. It was connected ...
by B&OBob
Mon Oct 29, 2018 8:32 am
Forum: Live Steam
Topic: Using a steam indicator
Replies: 42
Views: 7144

Re: Using a steam indicator

As for the piston displacement I used a linear system which worked fine. The real problems I found were with the sampling rate and the sequential reading of the sensors. Pressure and piston location were not sampled at exactly the same time by the Omega software I used and the hardware prevented it...
by B&OBob
Sun Oct 28, 2018 9:33 pm
Forum: Live Steam
Topic: Using a steam indicator
Replies: 42
Views: 7144

Re: Using a steam indicator

The commment about having to learn CAD before a meaningful drawing could be made was truly astounding. It ignores the reality that every prototype locomotive was designed and produced without the "benefit" of CAD! That every airplane in WW-II (whenever that was) was designed and built without CAD! T...
by B&OBob
Sat Oct 27, 2018 3:24 pm
Forum: Live Steam
Topic: Using a steam indicator
Replies: 42
Views: 7144

Re: Using a steam indicator

Hi -- In reply to your question of 10/24 on what I meant by an earlier comment about "meaningful measurements," I was referring to unavoidable small influences that deteriorate measurement accuracy, sometimes called "parasitic effects." They might be caused by clearance volume, piston or valve blowb...
by B&OBob
Sun Oct 21, 2018 10:54 am
Forum: Live Steam
Topic: Using a steam indicator
Replies: 42
Views: 7144

Re: Using a steam indicator

Here is an article published by the PLS Gazette that covers the topic of steam engine indicators: http://www.palivesteamers.org/pubs/gazette/2013_3-4.pdf The article mentions two British model engineers who made serious, well documented tests of miniature steam engines using electronics-based indica...