Robinson Hot Air Engine.

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madjackghengis:
Hi David, high temp silver solder works well with cast iron, lots of flux, and cleaning with an etchant or the electrolosys with washing soda, although I prefer powdered draino to remove all traces of oil from the pores, sodium hypochloride I believe, although your vinegar seems to have done a fine job so far of cleaning it up. Definitely paint the inside as it will improve the operation of the engine as well as reduce maintenance. When you are up and running, and working on efficiency, try stainless steel for a displacer, you can often find cans or tubes that can be modified to fit, used fuel filters for fuel injected cars are good cans, and stainless is a bad heat conductor as you probably know. If I didn't have so many projects already, I'd probably take a stab at mimicking your engine out of bar stock, it looks great, and does interesting things with the linkage, which always attracts the attention of bystanders. We Americans don't always drool, sometimes it collects in our whiskers on our chin and we can wipe it off before it falls, particularly as fall approaches, and the whiskers are allowed to grow. Thanks so much for showing a very interesting engine, an amazing engine, given it ran with everything wrong with it. Looking forward to a video when it is up and running again. :jaw: :nrocks: mad jack

Stilldrillin:
Well.
Now got a little time to sort Mrs. Robinson...... :thumbup:

Decided to rebuild to the "first run" stage, and get it right. Rather than try to complete in one go.....

Sorted a few problems along the way. Airway plug. Grooved piston. Added extra gasket to the base flange, for insulation.

1 piece of Esbit. Got a runner.......

After a few minutes warm up, she slowed. So, I added "water", (Bluecol top up coolant). Picked up! Ran faster! :clap:

Until the boiling radiator noises started, along with the steam...... :bang: :bang: :bang:

She's in disgrace, in pieces again! :scratch: ::)

David D

sbwhart:
Perhaps its needs a Dustin Hofman to sort her out like in the film

:D :D :D :D

Good work Dave

Stew

Stilldrillin:
Possibly, Stew! :thumbup:

But, I certainly aint any Graduate........ ::)

Good work? Not sure about that, until she runs properly.

Thanks anyway! :wave:

David D

Stilldrillin:
I've got a bit of a conundrum...... :scratch:

Need to treat every part/ joint which might leak. Starting from here, underneath the top cover......

It might be leaking between the bronze ring and casting. Can't remove the 1/8 BSPT tube. So, can't remove the ring.

I've boiled it in washing powder to degrease, and intend to run a bead of Heldite jointing compound around inside & outside of the ring.

Anyone got a better idea?

David D

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