Engines > Restoration of Model Engines

Stevens Model Dockyard Engine

<< < (2/9) > >>

Chipmaster:
Thanks Jason and Graham.

After a little more cleaning the counterbalance on my flywheel can be seen to be a piece of lead wedged in between the spokes and blended in with the outer face of the flywheel.

  IMG_4533 by Andy, on Flickr

IMG_4535 by Andy, on Flickr

Andy

Jasonb:
Funny enough I recently did similar to a Stuart 7" flywheel though I just bonded on some strips of lead with JB Weld.

What condition is the boiler in, ort is that just a water hopper feeding the pump that I can see?

Chipmaster:
Morning Jason,

The boiler;

Welded steel construction, possibly ex gas cylinder going by the weight, horizontal water tubes, probably gas fired.

 NIIZ4751 by Andy, on Flickr

IMG_4512 by Andy, on Flickr

Condition;

The water level gauge is intact
IMG_4512 (2) by Andy, on Flickr

Foundation Ring....
IMG_4520 by Andy, on Flickr

Genuine A J Reeves & Co pressure gauge in need of repair
IMG_4517 by Andy, on Flickr

I don't intend to try it out.

Andy

Chipmaster:
A couple of months later the consensus is that most of the engine is Stevens Model Dockyard and it needs a lot of work to sort it out. It knocks very loudly, the crankshaft is bent and the bearings are worn but it does run, I'll have a go but completing my Stuart Major has priority.

The crankshaft wasn't properly supported, one of the main bearings was in the wrong position because the void in the old cast iron base meant it couldn't be fixed in the correct position.

IMG_4561 (2) by Andy, on Flickr

I used a 1/4" thick brass plate to cover the old base and make a fresh start.

IMG_4672 by Andy, on Flickr

IMG_4739 by Andy, on Flickr

This enabled the main bearing to be moved between the crank web and eccentric.

IMG_4744 by Andy, on Flickr

The brass plate will improve the appearance.

IMG_4748 by Andy, on Flickr

However, it seems I will have to replace several parts to sort out the knocking, perhaps another crankshaft if I can't straighten the original. Here's a recent video of the engine running on compressed air. The first part of the video shows the engine at the outset then running after the brass baseplate was fitted. The knocking is terrible, I suspect the piston hits the lower cylinder cover but because of the way the engine was made there is no means to adjust for that.

 http://www.youtube.com/watch?v=N4k9T31Tw1k

Andy

internal_fire:

--- Quote from: Chipmaster on July 28, 2022, 11:49:14 AM ---I suspect the piston hits the lower cylinder cover but because of the way the engine was made there is no means to adjust for that.

--- End quote ---

Depending on the situation at the top end it might be possible to lower the standard a tad. Shaving the bottom of the feet could be difficult, but since you have added the brass base it should be quite easy to make a small recess under each foot.

Alternatively, the crankshaft could be shimmed upward.

Gene

Navigation

[0] Message Index

[#] Next page

[*] Previous page