MOC SAR 400 class garrett

Hello All

Below is a link to photos of my 1st completed MOC, this is also the first time I have ever posted photos of Lego models or provided links to such on Brickshelf, so apologies in advance if this does not work.

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=437417

Alternatively, if the link does not work, please search Brickshelf for the SAR400 folder.

The subject is a South Australian Railways 400 Class Garratt, and while the colour (dark green) is not quite correct, neither is building in all black, as in real life these locos were painted "Invisible Green". A green so dark it looked black unless it was parked beside something that was actually black, then you could see that it was really dark green.

It was motorized with 2 x XL PF motors in the foward and aft tanks, and the rechargable battery box is concealed in the firebox.

While I have no vidio of it in operation, it does work, but with some slowing down when going through a 90 degree curve, and it occasionally tended to derail on curves too. Probably too frequently for reliable opperation.

The part I'm most proud of the the working Valve Gear. That took a lot of fiddling to find the right liftarms to make it move smoothly. Unfortunately fully variable motion has eluded me so far, and I had to settle for fixing the valve gear in maximum cutoff position.

Enjoy!

Oldpossum

Hey Oldpossum, and welcome to ANZFOL!

Your Brickshelf folder isn't yet moderated, so is not yet public. However, I look forward to seeing your MOC, I believe I've actually ridden one of these many years ago...

Captain Zuloo wrote: I look forward to seeing your MOC, I believe I've actually ridden one of these many years ago...

Do you still have the stud marks?







Sorry couldn't resist!

That hurts like there is no tomorrow

Looks like a nice Moc, well done.

Excellent work now that I can see the photos! Your driving gear looks stunning, would love to see it in action. However, it looks really wide, anything you can do about that?

Hello Captain Zuloo

At the level of the running gear it is 13 studs wide.
(6 studs wheelbase, 1 stud for plates to lock pin rotation to wheels, 1 stud for connecting rods, 1 stud for drive rods, 1 stud for cam axle webing, 1 stud for admission valve rods, 2 studs for bushes.)

I could shave 1 stud off by taking a Hacksaw and cutting off a half stud length of axle from the cam axles, used to offset the admission valves movement from the driving rod movement. Then the admission valve movement would be secured by a 1/2 bush rather than a full bush.

Unfortunately all the other bits are required to make the valve gear work correctly.