Ericsson Hot Air Engine

All of the pictures on this page are of an Ericsson Hot Air Engine, the last being a diagram of the engine innards. The Ericsson engine is a Stirling Engine meaning it does not burn fuel to operate.…

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Heinrici Hot Air Engine
This article is based on an email conversation with This email address is being protected from spambots. You need JavaScript enabled to view it.">Brad Soward who was answering a series of questions sent to me from This email address is being protected from spambots. You need JavaScript enabled to view it.">Andrew Alkemade. The words are Andrew's and Brad's. The photos of Andrew's engine are his, and the photos of the engine at Brad's place are mine. Andrew and Brad have both given their permission to reproduce their discussion in the interest of helping other Heinrici restorers.

Andew's words and pictures are © Copyright 2003 Andrew Alkemade
Brad's words are © Copyright 2003 Brad Soward
My pictures are © Copyright 2003 Paul Pavlinovich

Andrew's request for assistance...

Hope you can help.

I have a Heinrici motor that was passed down by my father and his father.  The motor was used in a mineral water bottling operation that the Alkemade family ran around WW1.

The motor I have is a later model with a 2" bore and central displacer. (see photos).

I am very interested in talking with anyone that has one as mine has a problem which I would dearly like to fix.

As it was missing its original stand it had never been used to my knowledge until a few weeks ago when I finally got around to building one and got hold of an old kero blow lamp as a heat source.

After a 5 mins or so after a far bit of oil and assistance it finally started to run by itself. It lasted about 5 mins and started to slow down then it stopped.

I found that the arm that works the central piston had come loose from it shaft. Looks as if the locating pin had sheared some time ago and the rust has started to let go. Tried to fix it by drilling out the pin but that was less than perfect.  It worked for a while and was particularly good one very cold night.  The first time it ran it was lucky to do 150 RPM but on that night was probably closer to 300.

Since then the pin has worked loose again and the timing has slipped significantly to a point where it will barely run. Before I dismantle it to rebuild the shaft and create further problems for myself I have few questions if you can point me to someone who can help.
  1. Heat source is the kero blow lamp a suitable heat source or is it likely to be too hot and do damage.  How important is the water cooling if running it for short periods
  2. Timing. Should the central arm work exactly in parallel with the external arm attached to the fly wheel or at some other orientation. Does anyone have a description of the timing between the mail piston and the central one.
  3. Oil..should normal engine oil be placed in the "petroleum" cylinder and is there any special operation of the internal rod. I presume it provides lubricant to the central piston and the main piston.
  4. If I dismantle the main piston is there any special tricks I need to be aware of.
  5. Are you aware of anyone close to Melbourne that has one on going condition that might be able to help.…

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Kyko Stirling Fan

The pictures of this interesting stirling engine powered fan utilising a kerosene burner were sent to me by This email address is being protected from spambots. You need JavaScript enabled to view it. who wrote:
> Dear Sir:
>  I have a kerosene powered fan (KYKO the only markings) that in 1960 was being used by a doctor in the jungle of French speaking Cameroun. It had previously been used by an 82 yr. old British merchant who had spent many years in the Cameroun. It is in good working order and I brought it home with me to the US in 1979. It is an interesting piece and takes up a prominent place in my living room. I have decided to do research about it and am convinced from pictures and history found that I do have an original KYKO fan. I am looking for someone who could tell me more about it and give me an idea of what it is worth, or how to find out what it is worth. With your permission I could email a picture. Any help would be appreciated.
>  Sincerely,
>  John Rowe

If you're able to help John with information or a value then please contact him on the address within the article. Please let me know as well and I'll update this page.…

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