Search found 48 matches

by Dor_Crank
Tue Dec 09, 2014 12:17 pm
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

Looks like it's an end of the street on these parameter interpretation. Just need to figure the geometry and then to apply algebra on it to calculate the Reverse Arm Dimensions (L or Boomerang piece) to physically make this Arm pair. But still won't know how to translate the calculated dimensions on...
by Dor_Crank
Sun Dec 07, 2014 5:20 pm
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

Jos, I'm using the outside admission version, Wals_out. I don't know how true it is but I've read for a small scale of 1/32, it is hard to machine prototypical piston valves that are tight and workable. Thank you for describing the die block to valve stroke relationship along the expansion link slot...
by Dor_Crank
Sat Dec 06, 2014 3:24 pm
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

Jos, Thank you for your further suggestion. I gotten a little more understanding with it against the Reverse parameter pair, ReversArm to Central Norm and ReverseArm to Central Max. Yet, I still can't assign values to these parameters for my actual physical Walschaerts (outside admission) valve scra...
by Dor_Crank
Fri Dec 05, 2014 9:49 pm
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

I tried again. I did not enlarge to full screen. Then setup>set large icons,(to get the table in place) EditDim>set graphic zoom, I changed the 7.5 to 15. After this clicking the left buttons showed the parts. However, those with value 0.0 do not show!!! Change 0.0 to anything reasonable and the pa...
by Dor_Crank
Thu Dec 04, 2014 12:26 am
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

Thanks for answering Steve and Jos. As Jos wrote, the identification of those parameters I've listed disappears under the parameter display table. So, I don't understand what those parameters represent geometrically. For those people using other than Window 7 or Vista, please hit that little square ...
by Dor_Crank
Tue Dec 02, 2014 6:07 pm
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

For some reason, I couldn't post after my hiatus here. Lets see if this gets posted here. For those familiar with the Dockstader's simulation, please answer below. I want to feed my Walschaerts valve gear dimensions into Dockstader's simulation. I do not understand following parameters: 1. Drop Link...
by Dor_Crank
Tue Dec 02, 2014 11:31 am
Forum: Live Steam
Topic: How to start Walschaerts Design as a beginner?
Replies: 81
Views: 61723

Re: How to start Walschaerts Design as a beginner?

Hi Dorian, The best thing you can do is get hold of DL Ashtons book and also look at his website http://www.donashton.co.uk/index.html his mathematics are far more concise and true than either Evans or Greenly. the other thing to get hold of is Dr Alan Wallace's Valve gear simulator. Dockstader's i...
by Dor_Crank
Thu Aug 07, 2014 9:52 pm
Forum: Live Steam
Topic: Walschaerts - All Square Layout Design
Replies: 19
Views: 8456

Re: Walschaerts - All Square Layout Design

LBSC method per Daris tried: http://ibls.org/mediawiki/index.php?title=A_Suggestion_for_Setting_Out_Walschaerts_Gear This method was the easiest to do rather than the calculations and other drawing methods I've read. If it works, it'll be a definite plus! I've re-drawn my drawing to stick format and...
by Dor_Crank
Mon Jul 14, 2014 2:25 am
Forum: General Discussion
Topic: Dial Bore Gages Worth Buying?
Replies: 52
Views: 8487

Re: Dial Bore Gages Worth Buying?

Buy a quality set of tell gauges the diff is night and day to the cheap stuff. I like my Mytutoyo's,gave the Shars -whatever away. i also use Mitutoyo's (Me too toyota) :mrgreen: telescoping gauge set. the advantage of it, which i don't think would be unique to this maker is that it's T-head is squ...
by Dor_Crank
Mon Jul 07, 2014 1:51 pm
Forum: Live Steam
Topic: Walschaerts - All Square Layout Design
Replies: 19
Views: 8456

Re: Walschaerts - All Square Layout Design

to make it more interesting to the audience and those who are helping this effort, i've decided to put a drawing here. some basic decisions and fixed parameter values were made B4 the dwg that i may need to let go to make the valve gear work symmetrically. the valve is a slide valve, outside admissi...
by Dor_Crank
Mon Jul 07, 2014 12:55 pm
Forum: Live Steam
Topic: Walschaerts - All Square Layout Design
Replies: 19
Views: 8456

Re: Walschaerts - All Square Layout Design

Hello, Here's the 1917 Edition of Railway Mechanical Engineer. https://archive.org/details/railwaymechanica91newy Beginning on page 71, there is a complete dissertation (read all equations, etc.) on designing Walschaert Valve Gear. Have used this in conjunction with Mr. Dockstaders' valve gear prog...