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"The Wizard"

Started by lab-dad, May 22, 2013, 04:51:58 PM

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Ray Dunakin

This is going to be so awesome when it's done!
Visit my website to see pics of the rugged and rocky In-ko-pah Railroad!

Ray Dunakin's World

lab-dad

Thanks guys!

Having a little trouble;
Can someone explain the reverse lever and the tumbler shaft on a Shay to me?

The reverse lever moves longitudinally (front to back). While the tumbler shaft (running longitudinally) rotates moving the solid link changing the valve action.
How can the lever, or better yet it's linkage change the motion?

I have stared at drawings for hours!
I cant make sense of it, and i need to so i can make the linkage "work"



Marty

Arno Boudoiron

#107

Arno Boudoiron

#108
I did some research according to some pictures...
looks very simple to me now  :)

First the reverse lever is like a 'L'
Between it and the tumbler shaft's lever, there is a simple rod. Like in that picture
And that's it  :)

I hope I'm clear  :-\

we can (almost) see the things on this beauty;
http://www.gearedsteam.com/shay/images/w_g_tuten_10-sn850.jpg

Arno



lab-dad

Arno,
Thanks for the help!
Between what you and I have found I think I have it figured out.
I did not realize the "drop" in the linkage from lever to shaft.
That is what allows the change in motion.
So many "links" to do a simple motion......
You second image is of great help.
Thanks!
Marty

Arno Boudoiron

I'm glad you figured it out  :)
Because I have a lack of technical words in english, I understood tumbler shaft as rocker shaft... At the beginning I thought your issue was with the Stephenson valve gear itself  :D

Arno

PhilMorrow

Very Neat Marty.
Fascinating to watch over your shoulder.

Phil Morrow

kneighbarger

Stunning work, I really enjoy watching this come together.
You should post the comparison photo with the 1/4" Shay to give every
one a good idea just how impressive this Shay is.

After enjoying the shop machinery and the shop build, I just have to ask,
what do you have in mind to top this project ?
Ken

Malachi Constant

Quote from: kneighbarger on August 03, 2013, 11:44:18 AM
After enjoying the shop machinery and the shop build, I just have to ask,
what do you have in mind to top this project ?

When he's done, he should just mount it on his head and wear it as a crown!

Beautiful workmanship as always ...
-- Dallas Mallerich  (Just a freakin' newbie who stumbled into the place)
Email me on the "Contact Us" page at www.BoulderValleyModels.com

lab-dad

Thanks guys!
Sorry i missed your posts.  ???

I intend to just keep going in the scale, pains me to take down my O scale layout but it really is just collecting dust.
I have a copious amount of ideas/projects to build in 1:16 and (luckily) there are absolutely no kits!

Dallas, no hat it is too heavy!

The Shay is on temporary hold as I will be traveling through Yellowstone & the Tetons shortly.
Also I am doing some interior work on my '54 Chevy truck while our weather is poor.

More soon.
-Marty

Mr Potato Head

When your looking at the Tetons! Mr. Potato Head is only 4 1/2 hours away!
Stop by and say Hi, I will actually be traveling through there on the 15th!!
MPH
Gil Flores
In exile in Boise Idaho

nk

This is beautiful work. I think you should be making watches!
You may ask yourself: "Well, how did I get here?"

http://public.fotki.com/nkhandekar/

finescalerr

I think those watches would be closer to the size of big clocks, Narayan! -- Russ

lab-dad

Well the warning at the top says it all;
this topic has not been posted in for at least 120 days.

That was some vacation!
Well yes it was!

When I put the project on pause(thats French for stop)
I was at the most stressful part (or at least I felt that way).
The drive-shafts and u-joints.

I'm happy to say I figured it all out and she moves under her own power! ;D ;D ;D ;D ;D

So without further adieu;

This is one of the joints. The set screws are 6-32 and the O.D. of the aluminum is .875"
I'm quite happy with the performance and scale.
The original blueprints can be seen in the background.



Soldering up the yokes to the shafts;



And there is no sense in having a big ass machine shop if you cant use it for pictures!



I am glad to be back on this project.
Thanks for looking.
-Marty

finescalerr

You sure have big fingers.

I'm glad you're back on this project, too. Nice job on the drivetrain.

Russ