Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: crazydoug on March 10, 2019, 10:49:01 pm

Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: crazydoug on March 11, 2019, 09:24:31 pm
HaHa...jokes on me. I have a Paradox engine and have run it on acetylene. Never knew what i had was a non-compression engine till now!
crazydoug
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: RedRyder on March 11, 2019, 05:50:23 pm
Her's another non-compression engine.

The Paradox   Runs on illuminating gas (street gas).

Our friend Carl Swanstrom had a batch of gas mixed up that was 70% hydrogen, 20% methane, and 10% carbon monoxide.
This is Carl's video.

Enjoy,

Gil

https://youtu.be/GryagG9Fme0
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: RedRyder on March 11, 2019, 05:39:18 pm
Here are 2 videos by Wayne Grenning of a Crown Pumping Engine.

This is a non-compression engine.

Gil


https://youtu.be/7Hz_sX4cyBw


https://www.youtube.com/watch?v=Rq75tTzpzO0
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: RedRyder on March 11, 2019, 05:31:45 pm
Quote from: St Paul Steam on March 11, 2019, 03:48:10 pm
Maybe I'm dense...but I read both of these articles, they both talk about introducing fuel , igniting the fuel with a spark and that pushes the cylinder. ...isn't that   combustion & would that be some kind of compression to push said cylinder ?

Nobody is dense or stupid! They are just not well known in modern times. Non-compression simply means the fuel/air mixture is introduced at atmospheric pressure (0 psi) and ignited without mechanical compression of the mixture before ignition. These engines are not terribly powerful but they do work. They are typically flame ignition.
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: St Paul Steam on March 11, 2019, 03:48:10 pm
Quote from: classixs on March 11, 2019, 01:04:57 pm
Quite interesting engines these  :)


http://birkpetersens.blogspot.com/2014/04/non-compression-engine.html


https://www.eldensengines.com/Lenoir/Lenoir.HTML
Maybe I'm dense...but I read both of these articles, they both talk about introducing fuel , igniting the fuel with a spark and that pushes the cylinder. ...isn't that   combustion & would that be some kind of compression to push said cylinder ?
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: RedRyder on March 11, 2019, 02:29:54 pm
A Crown Pumping Engine is non-compression.
Paradox also fits in this category.
Otto-Langen fits too.
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: crazydoug on March 11, 2019, 02:24:42 pm
Quote from: classixs on March 11, 2019, 01:04:57 pm
Quite interesting engines these  :)


http://birkpetersens.blogspot.com/2014/04/non-compression-engine.html


https://www.eldensengines.com/Lenoir/Lenoir.HTML

Thanks. I learned something today!
crazydoug
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: classixs on March 11, 2019, 01:04:57 pm
Quite interesting engines these  :)


http://birkpetersens.blogspot.com/2014/04/non-compression-engine.html


https://www.eldensengines.com/Lenoir/Lenoir.HTML
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: Scorpion2nz on March 11, 2019, 01:02:25 pm
Hhmm, somebody posted while  i was still typeing
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: Scorpion2nz on March 11, 2019, 01:00:43 pm
Vacum engines ?
 Flame lickers or flame gulpers and also what about Newcomon atmospheric engine
Title: Re: not to sound stupid but... what is a non-compression engine?
Post by: St Paul Steam on March 11, 2019, 12:11:26 pm
you know Doug, I have read that title and thought the same thing 😯
Title: not to sound stupid but... what is a non-compression engine?
Post by: crazydoug on March 10, 2019, 10:49:01 pm
not to sound stupid but... what is a non-compression engine?
maybe i know them by another name, or i just don't have a clue!
crazydoug