This was my first runner, but once I got it going, I sort of lost interest in it and it has been languishing on my shelf gathering dust and looking forlorn.
This is Gerry Dykstra's (aka "Oldboatguy") design which I metricated and have posted the 2D ACAD drawing & *.dxf files in the uploads section.
The drawing has the various parts in different layers / colours - so by switching the layers on and off you can see where it goes relative to the rest.
There are detailed drawings of all the parts.
There are also a number of "doodles" wrt to manufacturing the chassis and the beam without a rotary table.
Here's the link :-
http://www.homemodelenginemachinist.com/index.php?action=tpmod;dl=item364
I never posted it under completed projects (because I never really completed it) - so I made a base for it, fitted the gland packings (thanks Tel) and added the slip reversing gear - cleaned it up and here it is.
Here the 180° slip reversing mechanism - you just rotate the flywheel in the direction you want it to rotate - this offsets the timing 180° and away you go.
Here's a video of it running :-
Heres the build thread :-
[url]http://www.homemodelenginemachinist.com/index.php?topic=11452.0]http://www.youtube.com/watch?v=3Dp5DApIwCk/url]
Heres the build thread :-
[url]http://www.homemodelenginemachinist.com/index.php?topic=11452.0
I changed the valve linkage to this bell crank arrangement as I was suspicious of Gerry's original cantilever design.
And finally a big thank you to Gerry Dykstra for posting the original plans for free use in the public domain - Gerry you got me started in this hobby and for that I shall always remain grateful.
Ken
This is Gerry Dykstra's (aka "Oldboatguy") design which I metricated and have posted the 2D ACAD drawing & *.dxf files in the uploads section.
The drawing has the various parts in different layers / colours - so by switching the layers on and off you can see where it goes relative to the rest.
There are detailed drawings of all the parts.
There are also a number of "doodles" wrt to manufacturing the chassis and the beam without a rotary table.
Here's the link :-
http://www.homemodelenginemachinist.com/index.php?action=tpmod;dl=item364
I never posted it under completed projects (because I never really completed it) - so I made a base for it, fitted the gland packings (thanks Tel) and added the slip reversing gear - cleaned it up and here it is.
Here the 180° slip reversing mechanism - you just rotate the flywheel in the direction you want it to rotate - this offsets the timing 180° and away you go.
Here's a video of it running :-
Heres the build thread :-
[url]http://www.homemodelenginemachinist.com/index.php?topic=11452.0]http://www.youtube.com/watch?v=3Dp5DApIwCk/url]
Heres the build thread :-
[url]http://www.homemodelenginemachinist.com/index.php?topic=11452.0
I changed the valve linkage to this bell crank arrangement as I was suspicious of Gerry's original cantilever design.
And finally a big thank you to Gerry Dykstra for posting the original plans for free use in the public domain - Gerry you got me started in this hobby and for that I shall always remain grateful.
Ken