Run time

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artfull dodger
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Re: Run time

Post by artfull dodger » Wed Feb 06, 2019 4:30 pm

Excellent run times of your Billy! Keeping the safety from wasting steam from lifting or weeping is key to long run times, just as keeping the gas turned right down.So many have no clue about this and steam around the track with the burner roaring and the safety lifted. Learning each engines quirks and mannerisms is part of the fun and the lure of live steam. These little beasts are alive, just as the old timers drivers described full size locomotives back in the glory days of steam. Then you take the next step and add a goodall or boiler refeed valve. Then you can remain in steam all day if you so desire, topping up water, steam oil and gas as needed. Spending your time at station stops tending your engine just as the driver and fireman do in 1:1 scale. Life is great!
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Re: Run time

Post by CSL » Fri Feb 08, 2019 4:41 pm

Interesting thought about the pop safety valve - I hadn't thought of that and it does rather appeal.

On the other hand, with a ground-level/slightly raised railway and young children about, maybe not quite yet!

My Bertie is basic spec - no pressure gauge, so a bit tricky to keep to a particular low boiler pressure.

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Re: Run time

Post by artfull dodger » Fri Feb 08, 2019 8:04 pm

The upgrade "pop" style safety valve just prevents the steam wasting from a valve that by design doesn't seal well so it wisps steam constantly instead of releasing at a specific pressure then resetting till pressure rises again. Ground level or raised doesn't matter much. Upgrading Bertie with the options like a pressure gauge, water top up and sight glass really make a basic engine better than some of the older classic range models from Roundhouse that cannot have a sight glass by design at this time. I took a Sammie and changed the valve gear from slip eccentric to Walschearts with the kit from Roundhouse. Mike
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Tom the blacksmith
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Re: Run time

Post by Tom the blacksmith » Fri Feb 08, 2019 8:14 pm

CSL wrote:
Fri Feb 08, 2019 4:41 pm
Interesting thought about the pop safety valve - I hadn't thought of that and it does rather appeal.
I thought exactly the same, I've noticed a fairly constant weeping from the RH safety valve. Are there any equivalent replacements available this side of the pond?

Lovely conversion on your Sammie Mike :thumbup: :thumbup:

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Re: Run time

Post by tom_tom_go » Fri Feb 08, 2019 8:54 pm

Tom the blacksmith wrote:
Fri Feb 08, 2019 8:14 pm
I thought exactly the same, I've noticed a fairly constant weeping from the RH safety valve.
When you say it constantly weeps at what pressure (and is your pressure gauge working accurately?).

On a gas loco you should be able to easily control the pressure without the safety valve going off once the loco is settled into the run.

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Re: Run time

Post by Tom the blacksmith » Fri Feb 08, 2019 9:18 pm

Sorry Tom, I didn't explain it well, it's not that it's blowing off all the time as if boiler pressure is too high or that the valve pressure was set incorrectly it just wisps steam fairly constantly. It doesn't really bother me, and I never really thought about it until Mr Dodger mentioned it.

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Re: Run time

Post by tom_tom_go » Fri Feb 08, 2019 9:21 pm

Take it apart and clean it, might have dirt or scale in it so not seating properly.

Failing that, contact Roundhouse and they should send you a replacement.

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Re: Run time

Post by CSL » Fri Feb 08, 2019 11:28 pm

artfull dodger wrote:
Fri Feb 08, 2019 8:04 pm
Upgrading Bertie with the options like a pressure gauge, water top up and sight glass really make a basic engine better than some of the older classic range models from Roundhouse that cannot have a sight glass by design at this time. I took a Sammie and changed the valve gear from slip eccentric to Walschearts with the kit from Roundhouse. Mike
Bravo! Not sure I'll ever get to that level.

I assume that if you fit the WeeBee safety valve the Roundhouse dome won't fit over it?

It seem that artfull dodger and tom_tom_go have completely opposing views on the practical effect* of replacing the Roundhouse safety valve!

*As opposed to the prototypical aesthetics of the pop 'n' shut function, which I doubt there's much disagreement over.

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Re: Run time

Post by artfull dodger » Sun Feb 10, 2019 6:42 pm

I use the safety valve made by Wee Bee Locomotive works, which is sold thru "The Train Department" website and shipped world wide. Available in many different pressure settings. According to the builder of the valves, who is also the leader of our local steam group, is the design of the RH valve that is prone to leaking as it relys on a O ring design. And while it does what is needed and does it well. Any steam leakage be it from the packing on the throttle shaft to the safety is wasteful and can reduce the run time. At a steam up with all the background noise, I have trouble getting my gas turned right down to keep even a proper pop valve from popping off constantly. Thats due to me being autistic and the noise overload overwhelming trying to hear the burner noise. Now on my 2 Regner models with thier noisy burners, when turned down to proper level I can still hear them. The Roundhouse FX gas system is really nice and really quiet when turned right down after initial start up and pressure raising.
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