Search found 783 matches

by BigDumbDinosaur
Fri Jul 19, 2019 12:17 am
Forum: Riding Scale Railroading
Topic: Interesting disc brake
Replies: 4
Views: 152

Re: Interesting disc brake

the cars running up / down the NE Corridor all have disc brakes, either inboard or outboard of the wheels. I believe that the inboard are called KNORR used by Amtrak.,,but may be siemens Hitachi (among others) in Japan makes the brakes you show. So does Siemens (Germany) Alstrom (Baharat?) in europ...
by BigDumbDinosaur
Tue Jul 16, 2019 11:08 am
Forum: Grand Scale Railroading
Topic: Train Crash
Replies: 7
Views: 438

Re: Train Crash

Trains don't "crash." They "wreck."
horses_face05.jpg
by BigDumbDinosaur
Fri Jul 12, 2019 8:48 pm
Forum: General Discussion
Topic: Needing a gear
Replies: 13
Views: 365

Re: Needing a gear

I'm sorry about the bad picture. I was trying to get something posted before I went to bed. Here's a couple better pics. I did start out looking for pinion wire, but wasn't finding what I needed. I just looked again and found brass 24DP, 14.5PA, 15T, in brass, so maybe it does exist somewhere. Look...
by BigDumbDinosaur
Sun Jul 07, 2019 2:06 pm
Forum: The Junk Drawer
Topic: Lathe setup device
Replies: 8
Views: 423

Re: Lathe setup device

Looks expensive. :shock:
by BigDumbDinosaur
Sun Jul 07, 2019 1:17 am
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 509
Views: 82918

Re: 12" working railroad

It's a tall order making it sound decent. I know on my kart engine I ran the valve lash at zero (cold). When warm the lash opens up a little, but it made the clatter go away 95% and also gets every .001" of lift in the game. That is characteristic of air-cooled engines. Aircraft engines are the sam...
by BigDumbDinosaur
Sat Jul 06, 2019 1:05 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 509
Views: 82918

Re: 12" working railroad

https://www.youtube.com/watch?v=MLyhCe_2t-M Here's a link to the S12 video on youtube. Sounds like a tired S12 Diesel engine under load. :D No resemblance whatsoever to a one cylinder, air-cooled engine with a sloppy valve train. :roll: BTW, I like that flip-down cover they have on the old S12's ex...
by BigDumbDinosaur
Fri Jul 05, 2019 10:50 pm
Forum: General Discussion
Topic: Best Hand-Held Tool for General Buffing?
Replies: 2
Views: 275

Re: Best Hand-Held Tool for General Buffing?

SteveHGraham wrote:
Fri Jul 05, 2019 4:34 pm
I'm thinking maybe an electric die grinder is the best tool for the job.
Buffing is a relatively low-speed operation. Die grinders typically turn at very high RPM and would, in my opinion, be wholly unsuitable for buffing.
by BigDumbDinosaur
Wed Jul 03, 2019 11:55 pm
Forum: Grand Scale Railroading
Topic: 12" working railroad
Replies: 509
Views: 82918

Re: 12" working railroad

I'm not really interested in a sound system and just want to eliminate any lawn mower like noise from the engine. Yes, but what do you intend to do about the prime mover's mechanical noises? The GX390 clatters like a bucket full of marbles, which is where quite a bit of the lawnmower sound emanates.
by BigDumbDinosaur
Sat Jun 29, 2019 1:20 pm
Forum: General Discussion
Topic: Reaming Cast Steel Fittings without a Mill
Replies: 27
Views: 1200

Re: Reaming Cast Steel Fittings without a Mill

What happened to the OP? You'd think he/she would be periodically getting into the "conversation."
by BigDumbDinosaur
Sat Jun 29, 2019 2:15 am
Forum: General Discussion
Topic: Reaming Cast Steel Fittings without a Mill
Replies: 27
Views: 1200

Re: Reaming Cast Steel Fittings without a Mill

If accuracy truly matters, I don't see how it can be done with anything but a reamer. The real problem to be solved is how to hold the piece so the bore being enlarged is exactly concentric to the drill press spindle and stays that way under the considerable torque that will be applied as the reamer...
by BigDumbDinosaur
Wed Jun 19, 2019 12:22 am
Forum: Live Steam
Topic: Technology is great
Replies: 17
Views: 3830

Re: Technology is great

I found that when I welded my first two together the ends of the rails that extend beyond the legs wound up pulling downwards a little bit. This is hard to get rid of, the welded side will always shrink unfortunately. If you were to use two different sizes of tube, and have one go through the other...
by BigDumbDinosaur
Sun Jun 16, 2019 2:54 am
Forum: General Discussion
Topic: Turning plastic on a metal lathe
Replies: 18
Views: 1505

Re: Turning plastic on a metal lathe

The portholes in my F7 are made of cast acrylic and were turned in a lathe. The cut was so smooth the surface was almost glassy in appearance. There were no ill effects on the lathe.