Engines > Restoration of Model Engines

An incomplete Grasshopper

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Chipswitheverything:
Looks as if most of what you have there has been quite capably machined even if there are a few snags and the odd bits missing. Hopefully, no need to be correcting fundamental mistakes.    With a nice new base and a suitable paint job, it should be a rewarding model to work your 'fluence upon,  with your customary attention to getting these engines needing some TLC attractively up to scratch. Dave

Charles Lamont:
It looks as though your starting point is a project in which the standard of workmanship appears to be very good (for once).

Sanjay F:
Thanks everyone - lot's of great advice. I'll check the brass shaft length; the retainers for the rods on the A-frame barely move they are so tight, so a little bit of work needed around that whole area. The retainers are threaded too, so I'll have to think about how to get each side the same length for sure. As you can see I have managed to get the flywheel, pulley wheel and bearing into the correct order, looks more like how it should!

I thought the beam was the symetrical and never noticed it had a top and bottom with a cast area for an oil cup....I'll flip it over and hopefully that'll work; it'll look good with an oil cup at the top. The other thing I noticed was how the valve gear twists as it lifts up and down; I think that caused by each side being not being symetrically positioned on the shaft and lifting each side by a different amount?

I finished the base albeit without any varnish and this engine is very different propsect from what I have attempted before. Anyway lot's to think about and I'm sure there'll be more; let dismantling and clean up begin ..........

kvom:
I built a grasshopper a few years ago.

Build thread https://www.modelenginemaker.com/index.php/topic,8074.0.html



Design was taken from Muncaster drawings converted to SolidWorks by Julius.

The advantage of grasshoppers over fixed beam engines include smaller footprint and no need for Watts linkage.

Sanjay F:
That looks very different too and I like the governor mechanism; nice job.  :ThumbsUp:

I see the A-frame and the ladder are made from rods. Yes, I've heard the Watts linkage can be an interesting thing to get right, I'll leave that for another beam engine in future

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