Search found 960 matches

by RET
Mon Dec 11, 2023 2:59 pm
Forum: Live Steam
Topic: Prototype Poppet Valve Throttle
Replies: 21
Views: 29377

Re: Prototype Poppet Valve Throttle

Hi, Here is the modeltec 4 aces information; cross section, text and full page. 4Aces throttle cross section.jpg 4Aces throttle text.jpg 4Aces throttle.jpg and here is my similar 2 poppet design that I did for the Boston & Albany. The poppets are 5/16" and 3/8". Boston & Albany...
by RET
Mon Dec 11, 2023 1:19 pm
Forum: Live Steam
Topic: Prototype Poppet Valve Throttle
Replies: 21
Views: 29377

Re: Prototype Poppet Valve Throttle

Hi, For what its worth, here are a couple of pictures of the 4 poppet throttle on Gerhardt's Big Boy. see the thread on it for more pictures, etc. IMG_0495.JPG I modified Gerhardt's design and added the "O" rings because I thought it was too hard to get 4 poppets to seal, metal on metal. T...
by RET
Wed Nov 29, 2023 4:11 pm
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 125
Views: 99870

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi, I'd like to add just a little bit more from my memory of the "Good old Days." Back in the 50's Canadian National had two fast passenger trains that operated a daily service between Toronto and Montreal; number 6 that ran Eastbound from Toronto and number 15 that ran Westbound between M...
by RET
Fri Aug 18, 2023 3:34 pm
Forum: Live Steam
Topic: Drafting issues
Replies: 30
Views: 6294

Re: Drafting issues

Hi Chris, You might look at our Big Boy pictures, especially the recent ones showing the smoke box detail. In the model Big Boy smoke box, Gerhardt duplicated the full size setup as closely as he could. While it isn't running yet, I've put 5 pounds of air on the supply to all the blower nozzles and ...
by RET
Tue Jul 04, 2023 2:02 pm
Forum: Live Steam
Topic: IS our hobby dying in Canada?
Replies: 60
Views: 16014

Re: IS our hobby dying in Canada?

Hi, I don't think the hobby is dying, but it is changing. Yes, buying lathes, mills, etc. is expensive, especially if you are considering buying something new. It is an expensive hobby to get into, but it is a relatively low cost hobby once you are in it. Unfortunately, there are many other obstacle...
by RET
Tue Jul 04, 2023 11:51 am
Forum: Live Steam
Topic: Union Pacific Big Boy in 3/4 Inch Scale
Replies: 125
Views: 99870

Re: Union Pacific Big Boy in 3/4 Inch Scale

Hi, The revised cladding stretcher "kinda" works, I found it took a lot more force to deform the cladding than I thought. I had to make a heavier "hook" or "cladding puller" to go on the inside of the cladding and with those changes, the bulges for the piping were made ...
by RET
Sat Jul 01, 2023 3:21 pm
Forum: Live Steam
Topic: 3/4" Big Boy project
Replies: 9
Views: 1800

Re: 3/4" Big Boy project

Hi, I think I finally found out how to make a link to a thread in chaski. Here is the link to our Big Boy http://www.chaski.org/homemachinist/viewtopic.php?t=74537 . If I've done it right, go to the thread you want, right click and from the drop down menu choose "copy link." this puts the ...
by RET
Fri Jun 30, 2023 11:13 am
Forum: Live Steam
Topic: 3/4" Big Boy project
Replies: 9
Views: 1800

Re: 3/4" Big Boy project

Hi,

The Big Boy thread is back on page 8 now if anyone is interested.

Richard Trounce.
by RET
Fri Jun 30, 2023 9:58 am
Forum: Live Steam
Topic: 3/4" Big Boy project
Replies: 9
Views: 1800

Re: 3/4" Big Boy project

Hi, There is a lot of beautiful work done but there are also some errors, in particular the exhaust piping under the smoke box (each stack took the exhaust from just one set of cylinders). Now, if you want to build one of these in any gauge, you can get ALL of the original full size drawings from th...
by RET
Sun Apr 30, 2023 9:51 am
Forum: Live Steam
Topic: Superheated or Saturated?
Replies: 30
Views: 6184

Re: Superheated or Saturated?

Hi Frank, Here is a picture of the blast nozzle. I did the best I could, but the picture is still pretty poor. It does however show the 4 little slots in the blast pipe and the step between the nozzle and the 4 blower holes which I haven't mentioned before. Blast Nozzle-4.jpg The step is necessary, ...
by RET
Thu Apr 27, 2023 10:24 am
Forum: Live Steam
Topic: Superheated or Saturated?
Replies: 30
Views: 6184

Re: Superheated or Saturated?

Hi Frank, The secondary petticoat is shown in place in the first of the three pictures and is lying horizontally on the buffer beam at the bottom of the second picture. The petticoat assembly slips over the blower ring that surrounds the blast nozzle. The main petticoat pipe has been raised a bit to...
by RET
Wed Apr 26, 2023 1:05 pm
Forum: Live Steam
Topic: Superheated or Saturated?
Replies: 30
Views: 6184

Re: Superheated or Saturated?

Hi Dave, Personally, I am in favour of superheat, although Bill Shields is probably right when he says that superheaters serve as evaporators (driers), not superheaters because of the relatively large amount of water droplet carryover that must disappear before any degree of superheat can be obtaine...