Search found 136 matches

by daves1459
Fri Oct 04, 2019 8:26 pm
Forum: Live Steam
Topic: 730 Old Boiler Dissection
Replies: 70
Views: 4855

Re: 730 Old Boiler Dissection

I've been reading this thread with great interest since it's beginning. There have been several explanations that I found very enlightening. BUT, can anyone explain or suggest why by far the greatest amount of rust or deterioration is on the crown sheet whether on the steam or fire side? If it were ...
by daves1459
Thu Sep 19, 2019 9:26 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 1969

Re: To Turbulize or not

It occurred to me that measuring the effect of a turbulizer in a model boiler would actually be rather easy. First with out a turbulizer in a tube place a thermocouple in the inlet and outlet of a tube. Pick a easily repeatable operation mode and location and run the loco and read the inlet and outl...
by daves1459
Thu Sep 19, 2019 9:02 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 1969

Re: To Turbulize or not

these devices have been around a long time in industrial as well as residential boilers...and everyone has the 'best' idea, but the reality is you gotta play with it....or just take an idea and make it fit...you literally have nothing to lose http://cleanboiler.org/learn-about/boiler-efficiency-imp...
by daves1459
Tue Sep 17, 2019 8:45 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 1969

Re: To Turbulize or not

A question on the test setup, did you set air the flow rate to be equal durring each test, or was the the flow controlled by pressure drop through the tubing? If both test were run at a set inlet pressure then the higher temp might be a result of a lower flow rate caused by the added pressure drop ...
by daves1459
Tue Sep 17, 2019 8:41 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 1969

Re: To Turbulize or not

Hi Dave, Yes a turbulator should make a difference, but if you are going to try one, try the zig-zag type instead of the twisted strip style. The zig-zag type is much more efficient. At one time I believe it was patented, but any patents should have run out a long time ago. The whole idea of a turb...
by daves1459
Mon Sep 16, 2019 11:12 pm
Forum: Live Steam
Topic: To Turbulize or not
Replies: 12
Views: 1969

To Turbulize or not

Turbulizers are often mentioned inserted into boiler tubes of boilers fired by propane. They are usually considered essential to the performance of the boiler to the point of the difference between producing enough steam or not. Yet many are unsure as to if they are necessary or actually do anything...
by daves1459
Fri Sep 13, 2019 4:07 pm
Forum: Live Steam
Topic: steel tires
Replies: 22
Views: 2509

Re: steel tires

Unless there's something I don't know, that isn't true. Mild steel is not heat-treatable by conventional means, as the carbon content is too low to achieve the desired hardness. One does have the option of pack hardening, or having carbon infused by a carbon rich heat treat furnace atmosphere, but i...
by daves1459
Thu Sep 12, 2019 1:06 am
Forum: Live Steam
Topic: steel tires
Replies: 22
Views: 2509

Re: steel tires

My experience is the same as the other responders that .001" interference per 1" diameter works very well. Heating to 400 F for a half hour will allow a few seconds to seat the tire after it is served up to the wheel. I prefer a shoulder on tire so during those few seconds before it shrinks onto the...
by daves1459
Wed Sep 11, 2019 10:22 pm
Forum: Live Steam
Topic: Passenger Car Maroon
Replies: 11
Views: 1624

Re: Passenger Car Maroon

Thank you fellas! These are all good comments and suggestions. I will follow up on them and try to come up with a workable solution.

Dave
by daves1459
Tue Sep 10, 2019 12:06 am
Forum: Live Steam
Topic: Passenger Car Maroon
Replies: 11
Views: 1624

Passenger Car Maroon

Since we're discussing paint what would be a good maroon paint and source for wood passenger cars? I'm modeling in the 1880 to 1900 period. I've tried a couple Floquil maroons to make color swashes to replicate. But, they seem dark and lacking brightness or a more red hue as I think would be expecte...
by daves1459
Thu Aug 01, 2019 2:50 am
Forum: Live Steam
Topic: cylinder block.
Replies: 21
Views: 3225

Re: cylinder block.

Daves, Thanks for the detailed description. Is the reason for avoiding SAE 660 (AKA C932) because of its lead content? Dan, Some suppliers rate SAE 660 as easy to solder and braze, others say poor to fair. I'm in the poor to fair camp. I'm not sure what the problem is, whether it is the lead or zin...
by daves1459
Wed Jul 31, 2019 9:17 pm
Forum: Live Steam
Topic: cylinder block.
Replies: 21
Views: 3225

Re: cylinder block.

Daves1459, you said, “The cylinder shown has a A36 saddle section, a 12L14 cylinder, and aluminum bronze valve seat.”. 12L14 steel and (especially) Al bronze can be very challenging to silver solder. Could you elaborate on your technique for silver brazing these materials? I have not had any partic...