Search found 103 matches
- Sat Sep 16, 2023 10:01 am
- Forum: Build Log
- Topic: CPR G5C Class 1246 Pacific
- Replies: 34
- Views: 37618
Re: CPR G5C Class 1246 Pacific
[*]How often, if ever, do live steam modelers use forgings instead of castings? I've got a set up for propane blacksmithing and a plazma cutter, so most of what I do will be dictated by what I can make stock look like using those tools.[/list] Alright... It's been 5 years or so. I found this video ...
- Wed Aug 09, 2023 10:02 pm
- Forum: Live Steam
- Topic: Seeking source: Full size Case traction engine drawings
- Replies: 4
- Views: 1572
Seeking source: Full size Case traction engine drawings
Long time no see. I'm told full size traction engines are on the rare side of ownership simply due to size, and I believe it. In the spirit of curiosity, does anyone have a good source for Full-size drawings of American traction engines? I picked Case out of a hat. There's a few out there for variou...
- Fri Jul 14, 2023 10:50 pm
- Forum: Grand Scale Railroading
- Topic: Minimum radius for 2 ft. gauge
- Replies: 15
- Views: 19459
Re: Minimum radius for 2 ft. gauge
Here is an informative and similar thread. http://www.chaski.org/homemachinist/viewtopic.php?t=94864 It’s a quick read as only 5 or 6 replies. The essence is, the trailing truck can disproportionately increase minimum turning radius. Also, a quick rule of thumb mentioned is: wheelbase (W) times 20 ...
- Mon Feb 28, 2022 6:07 am
- Forum: Live Steam
- Topic: Steam railroading to return to Alaska!
- Replies: 259
- Views: 268805
Re: Steam railroading to return to Alaska!
Sorry if it’s a silly question, but how did it get 1/4” off?
- Fri Jan 07, 2022 8:22 am
- Forum: General Discussion
- Topic: How precise are measuring instruments?
- Replies: 43
- Views: 18330
Re: How precise are measuring instruments?
I think it's great to see this additional and mostly less well known information. Ron's original question was how precise are measuring instruments. By now he must be thinking he got a great deal more than he was expecting with that simple question. There's a whole lot more to it than just what the...
- Thu Jan 06, 2022 1:29 pm
- Forum: General Discussion
- Topic: How precise are measuring instruments?
- Replies: 43
- Views: 18330
Re: How precise are measuring instruments?
Funny you mention it, I learned the other day about the Linearity and Bias study. Pretty much exactly like the incremental block you’ve got there: you measure several different parts of varying sizes with a calibrated size, then measure each of those parts several times. I just did this for a 2D las...
- Mon Jan 03, 2022 4:28 pm
- Forum: General Discussion
- Topic: How precise are measuring instruments?
- Replies: 43
- Views: 18330
Re: How precise are measuring instruments?
I got a little red book: “Inspection and Gaging,” which I think another member here recommended. Actually has a section on squares, and had some interesting points: while you can see breaks in light between two objects to some ridiculously low number, something like .000005”, your eye can’t differen...
- Wed Dec 29, 2021 8:26 am
- Forum: General Discussion
- Topic: How precise are measuring instruments?
- Replies: 43
- Views: 18330
Re: How precise are measuring instruments?
I need help with a couple of your acronyms: We can?t ignore GD&T because ... What's GD&T? we call that study a GRR And what's GRR? -- Russell Mac GDT= Geometric Dimensioning and Tolerancing. It’s the “design intent” way to dimension a part. There’s a whole standard (ASME Y14.5) that says wh...
- Wed Dec 29, 2021 3:20 am
- Forum: General Discussion
- Topic: How precise are measuring instruments?
- Replies: 43
- Views: 18330
Re: How precise are measuring instruments?
The question has come up as to how square is a table saw blade to the table. If you want the blade to be exactly 90°square to the table, you would use a machinist's square and check for any light (gap) between the square and the blade. The question is; how precise is a machinist's square? Is there ...
- Fri Nov 19, 2021 4:34 pm
- Forum: Live Steam
- Topic: Tracks to the Trenchs World War 1 Commenmoration
- Replies: 32
- Views: 26109
Re: Tracks to the Trenchs World War 1 Commenmoration
I’ve almost worn out my copy of “narrow gage to no man’s land.” I’m experimenting with scaling in Solidworks. I got it to work in a way that you draw the model based on full-size prints, make configurations specific to a scale, then modify certain dimensions for stock sizes and such. The Davenport r...
- Thu Jun 17, 2021 7:28 am
- Forum: Live Steam
- Topic: Tracks to the Trenchs World War 1 Commenmoration
- Replies: 32
- Views: 26109
Re: Tracks to the Trenchs World War 1 Commenmoration
This book is AWESOME by the way. Thanks!pat1027 wrote: You might be interested in the book "Narrow Gauge to No Man's Land" by Richard Dunn ISBN-10 : 0961546727
- Tue Jun 15, 2021 7:46 am
- Forum: Live Steam
- Topic: Slide valve
- Replies: 49
- Views: 23567
Re: Slide valve
Sorry for opening the can of worms; everyone was being so civil until I showed up.