Also started a topic here
http://www.energeticforum.com/renewable-energy/17019-chris-hunter-alaska-star-releases-o-u-pdf.html#post255631


thx
Chet

more to come.........
I am corresponding with Chris

I have invited him to assist.

Will keep you posted.

thx
Chet

Works as advertised
Chris reiterated "works as advertised in the PDF"

Graham in the UK [Member Grumage] has completely commited to an Open source replication which will be built by him and his boys.

Graham Is one cool dude with vast experience in engine building, from sand casting one off designs at the foundry on up.....

his old web site
Alyn Foundry Home Page

and he loves working with Propane [30 plus years experience]

the thread will be run from OUR a privately funded site completely commited to open source [no advertising revenue or Hits agenda, just free sharing]
here
Refrigerant Powered Engine (gasoline replacement instructions pdf)

and will be mirrored here and elsewhere [if permitted]

Graham wants to showcase a running Chris Hunter design at a public show next month in the UK.

More to come......

thx
Chet

Dear All.

After a lengthy chat with Chet yesterday afternoon I am allowing you access to the You tube videos I made during the last six weeks or so's replication attempt.

My Son and I have drawn the following conclusions.

A standard four stroke car engine is totally unsuitable for a successful end use product. Why ?? Because the valve stem seals are the wrong way round to seal the refrigerant. Because you only need a pressure and then an exhaust once per revolution. Because standard piston rings are leaky and should be replaced by suitable Pneumatic / Hydraulic Lip seals to prevent the refrigerant being lost down past the piston.

An off the shelf Two stroke engine also has issues !! Refrigerant get's transferred via, you guessed, the transfer ports !! This causes piston locking also detrimental to running.

Near the end of our tests we were using Propane as our refrigerant. At 20 C / 70 F it boils at a pressure of around 120 PSI. No where near enough pressure to get more than a few 100 RPM !! Now if the cylinder was heated that pressure would naturally increase creating more RPM and more torque at the crankshaft. And also require less liquid refrigerant too.

Our conclusion.

This is undoubtedly an amazing idea. And with, let's say, a suitably modified liquid heated four cylinder block and a specially made ( custom ) cylinder head fitted with electric inlet and exhaust valves, i.e. solenoid type, would probably work exceptionally well.

The key is...... Delta T, the greater the temperature differential the more powerful the engine would become.

I have posted this info for you to go ahead with a replication. I found the whole experience interesting and educational. I also hope that my findings will stop you making the mistakes I made so you can move onto the next phase change !! Pardon the pun !! 

Cheers Grum.

https://www.youtube.com/watch?v=a72Sg8pBQO4

https://www.youtube.com/watch?v=gneY8q6oUpY

https://www.youtube.com/watch?v=VIGn14lxOfA

https://www.youtube.com/watch?v=WjA9kRlRs88

https://www.youtube.com/watch?v=5bTiz7e2t2w

Grum
Your efforts here are amazing ,this opens up a whole realm of possibilities .
As you know there have been other developments which have resulted from this Tech
and these investigations into increasing the Delta T.


Very exciting indeed.


much more to come.


Thx

Chet