Search found 1526 matches

by rkcarguy
Tue Jan 19, 2021 8:09 pm
Forum: Riding Scale Railroading
Topic: Controlling separate DC traction motors
Replies: 4
Views: 163

Re: Controlling separate DC traction motors

Glenn, As Wichita mentioned, the motors need to be well "matched" to do this. I have experience with this on a smaller scale (RC car racing plus some play with R&D for the same), and it often meant picking through several motors and dyno testing them to get a pair that were close enough to run as tw...
by rkcarguy
Mon Jan 18, 2021 12:49 pm
Forum: Live Steam
Topic: Tubes...leaking
Replies: 69
Views: 1899

Re: Tubes...leaking

From what I can see in the pictures, the welds look like they lack penetration somewhat, but I would guess that the tube has cracked or corroded right behind the weld in the "heat affected zone". Unfortunately, time to tear it down and re-tube the boiler. If it's 40 years old, it's probably time.
by rkcarguy
Thu Jan 14, 2021 1:41 pm
Forum: Live Steam
Topic: Piston Ring Question
Replies: 24
Views: 1561

Re: Piston Ring Question

I would not recommended Quads at high velocity.. I've printed out extensive information regarding feet per minute, temperatures, expansion/temp relation, and the like. This is correct, I think the feet per minute in a steamer exceeds the specs for the quad type rings. Glass filled PTFE seems to be ...
by rkcarguy
Thu Jan 14, 2021 1:31 pm
Forum: Live Steam
Topic: Tubes...leaking
Replies: 69
Views: 1899

Re: Tubes...leaking

OMG "exercise in continuous maintenance" so true. I was told that for every hour run time = 2 hours maintenance and another guy said not true. Well I have been at this cense Aug 17, 2019 and still don't have one hour of run time. I don't want to "leak water" on live steam, but this is one of the re...
by rkcarguy
Tue Dec 22, 2020 6:00 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 141
Views: 82524

Re: EMD F7 in SCALE

BDD, I'm curious what material your brake discs are made of? Steel? Cast iron? Stainless?
by rkcarguy
Tue Dec 22, 2020 1:16 pm
Forum: Grand Scale Railroading
Topic: Brake System Design
Replies: 16
Views: 5812

Re: Brake System Design

I have added brake drums to my axles so I have more braking area and longer pad life, that is also not on a tapered surface. From what I have seen of others work here, many just make their pads square and let them wear into the taper of the wheels. And then there are disc brakes... :D truck_ass_1en...
by rkcarguy
Mon Dec 21, 2020 5:51 pm
Forum: Grand Scale Railroading
Topic: Brake System Design
Replies: 16
Views: 5812

Re: Brake System Design

I don't think using actual brake lining material is a bad idea. I am using the friction material from McMaster-Carr on my build, they have 4 different kinds with various feet/per min, PSI, and temperature ratings. I don't think you can go wrong with real brake show material if that is what you've go...
by rkcarguy
Wed Dec 16, 2020 1:53 pm
Forum: Grand Scale Railroading
Topic: 15" Gauge 1907 4-4-0 Project
Replies: 18
Views: 16605

Re: 15" Gauge 1907 4-4-0 Project

I received your email and replied from my company email. I'll await your drawings.
We can "keyhole" the bottom of the firebox on the new boiler so that it will fit between the rear drivers, Glenn is having the same problem.
by rkcarguy
Wed Dec 16, 2020 12:01 pm
Forum: Grand Scale Railroading
Topic: 15" Gauge 1907 4-4-0 Project
Replies: 18
Views: 16605

Re: 15" Gauge 1907 4-4-0 Project

Thanks for the plug Glenn. Yes our shop has PP, R, S, and U "stamps" for building certified pressure vessels and piping. In some states riveted and lap seam boilers can be ran on private property only, other states disallow them being pressurized all together. You're welcome to PM me if interested a...
by rkcarguy
Tue Dec 15, 2020 7:54 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 141
Views: 82524

Re: EMD F7 in SCALE

http://www.chaski.org/homemachinist/viewtopic.php?f=45&t=105775&p=379957&hilit=headlight+lenses#p379957 This was the link for the lathe turned ones. Note that for many lights, the lenses are actually clear and it's the bulb, or a colored shade behind the lens in the case of a searchlight signal, tha...
by rkcarguy
Tue Dec 15, 2020 5:45 pm
Forum: Riding Scale Railroading
Topic: Trackulence
Replies: 11
Views: 1599

Re: Trackulence

If the bumps in the track were offset from each other, it would nicely portray the old bolted rail that got super lumpy. I have childhood memories of my mother backing her car back up from a RR crossing, because the 40' gondola's of coal heading the power plant on the 40' jointed rails were bucking...
by rkcarguy
Tue Dec 15, 2020 4:59 pm
Forum: Build Log
Topic: EMD F7 in SCALE
Replies: 141
Views: 82524

Re: EMD F7 in SCALE

Some years ago someone posted a very interesting thread about making fresnel lens by heating acrylic disks and pressing them into shape with a die he made up on his lathe. I’ve been looking for it ever since, to no avail.... Glenn Glenn, I think someone posted that as a response in my signal thread...