Search found 76 matches

by daves1459
Sun Jul 15, 2018 11:40 pm
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Re: Rapid Syeam Pressure Loss

What size are the holes for your blower? They almost look like the same size as your exhaust. I have 6 x .0625 diameter holes for my blower, (print dimensions from Gene Allen's consolidation drawings). Best way to determine blower/draft is to open fire box door and adjust until no flames come out o...
by daves1459
Tue Jul 10, 2018 3:15 pm
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Re: Rapid Syeam Pressure Loss

Morning Dave, interesting write up. I have a few years of propane burning under my belt. the design and setup sounds good with the exception of the excessive draft chilling the fire box, as your testing shows. the ways i have seen this addressed is, extending the blast nozzle up into the petty coat...
by daves1459
Tue Jul 10, 2018 3:09 pm
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Re: Rapid Syeam Pressure Loss

It appears the general opinion is too much draft. I imagine the next step is to cause a reduction in draft and determine if there is a measurable reduction in the amount of steam pressure loss for the same amount of work. It is very easy for me to remove the exhaust nozzle as shown in the picture an...
by daves1459
Tue Jul 10, 2018 2:53 pm
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Re: Rapid Syeam Pressure Loss

Sounds like to much air. Also, from the picture you gave us a question is does any flame reach the water legs sides of the firebox? It seems like all the burners point straight up to crown sheet. As others have said very little blower should be needed. The flames actually radiate sideways through s...
by daves1459
Tue Jul 10, 2018 10:12 am
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Re: Rapid Syeam Pressure Loss

Interesting write up. Sorry to read loco operating performance is suffering...at least the little tea kettle steams well. Maybe, too well. You listed various types of correction action as follows... 1. Raise the exhaust nozzle up into the stack. 2. Put a variable damper in the smoke box. 3. Put var...
by daves1459
Sun Jul 08, 2018 9:52 pm
Forum: Live Steam
Topic: Rapid Steam Pressure Loss
Replies: 21
Views: 1259

Rapid Steam Pressure Loss

You may recall a few weeks ago I asked for discussion on what would cause the excess laboring of my Disney 4-4-0 going up a hill. Thank you for all of your suggestions. Turns out it was a matter of break in and adequate cylinder oiling. Now that the stiffness has been worked out another problem has ...
by daves1459
Mon Jun 11, 2018 7:17 pm
Forum: Live Steam
Topic: Piston Ring Drag
Replies: 11
Views: 1068

Re: Piston Ring Drag

Given what I've observed and the opinions it appears likely there Is a heat expansion issue some where in the cylinder. The next step is to remove the front cylinder covers and examine the bores for evidence. I'm laid up this week tendonitis in my right leg. But, will try to get to it next week and ...
by daves1459
Mon Jun 11, 2018 2:22 pm
Forum: Live Steam
Topic: Formed cab roof angle 16 ga. steel
Replies: 15
Views: 1729

Re: Formed cab roof angle 16 ga. steel

Thank you all for the many helpful suggestions. There areso many I won't quote each directly, but do it as follows. Dan, I once had thought about using square tubing (perhaps you had originally suggested that to me, but my memory being what it ain't...). So square tubing is at the top of the list. ...
by daves1459
Sat Jun 09, 2018 9:10 pm
Forum: Live Steam
Topic: Piston Ring Drag
Replies: 11
Views: 1068

Re: Piston Ring Drag

Suggest running the engine upgrade with compressed air rather than steam. If it runs ok on air, then the problem is likely differential expansion at steam temperature. When you say there is 0.006” clearance between the piston and cylinder, does this allow for the reduction of bore diameter from pre...
by daves1459
Sat Jun 09, 2018 11:16 am
Forum: Live Steam
Topic: Piston Ring Drag
Replies: 11
Views: 1068

Piston Ring Drag

I just finished the restoration of a Disney 4-4-0. The original cylinders are cast bronze with 2 1/8" bore making the loco very slippery. During the restoration I sleeved the cylinders down to 1 3/4" diameter using Boston solid cast bronze bearings pressed in place with .002" diametral interference ...
by daves1459
Fri Jun 08, 2018 9:26 pm
Forum: Live Steam
Topic: Formed cab roof angle 16 ga. steel
Replies: 15
Views: 1729

Re: Formed cab roof angle 16 ga. steel

I've run into this problem. There are several ways to skin the cat. Consider this one: 1. Cut a strip of metal 1/4" wider than both legs of your angle added together. 2. Anneal the strip to a dull red. A propane torch will do this size metal. Start on one end and move the "red" annealed area the ful...
by daves1459
Sat Jun 02, 2018 8:53 pm
Forum: Live Steam Marketplace
Topic: 2/12" Scale Brake Valves
Replies: 9
Views: 2067

Re: 2/12" Scale Brake Valves

Hello Jack,

Do you have any plans to make any more of the S6 valve in 1 1/2" scale?

Thanks, Dave