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Author Topic: Horizontal Hit and Miss Complete Engine Model (microcosm)  (Read 664 times)

jkbixby

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Jim, Bruce, et al, These should be run on Coleman Fuel which is Naphtha.
It is also called White Gas. It does not smell bad like automotive gasoline.
Car gasoline has lots of nasty poisonous additives in it that are designed to be pushed through a catalytic converter at 1800 degrees to react properly. Car gas also has ethanol and between that and the other additives it will begin to eat into your engine parts. In a cool running engine like this these, the additives are just real stinky poison. If you don't have Coleman fuel handy, Ronson or Zippo lighter fluid is also a naphtha product which will burn nicely in these little engines.

A few days ago I ordered 2 of the Eachine ST1 from Banggood. I hope they ship them. They never were able to ship me the blue ones I ordered last year.

The engines are the design of David Kerzel in Florida. He spent a couple of years perfecting the design and then published the plans for free use by the public for hobby machinists to build for themselves. The co-operative where Jin's stuff is made builds these to David Kerzel's plans and they have done a nice job of it.



The newer natural finished versions are a substantial improvement over the original electric blue anodized pieces. I payed Jin 380 USD for my older blue one and $235 each including postage for the two I just ordered. It is my understanding that another site called AliExpress also sells for a little less. I know nothing about how reliable they may be. So far I have not had luck buying gas engines from Banggood but they have always refunded quickly when asked. I have bought a number of Jin's Microcosm products like small steam engines and governors for about half the price I paid Jin for them.

The main thing is if you get one, please use Coleman Fuel or similar.
I also mix a little Marvel mystery oil with the Coleman Fuel (or 2 cycle oil).
They don't run hot enough to burn the oil. They just push it out through the exhaust while they run.

Gil

Thanks for the heads up Gil - will use Coleman fuel in my AliExpress engine if and when it arrives. And how much is "a little" Marvel Mystery Oil - any idea on the gas/oil ratio?
Regards,
Larry