On Thu, 01 Sep 2016 15:15:08 -0500, Tim Wescott
wrote:

On Thu, 01 Sep 2016 14:27:52 -0400, Jim Wilkins wrote:

"Tim Wescott" wrote in message
...
On Wed, 31 Aug 2016 22:16:02 -0700, Larry Jaques wrote:

On Wed, 31 Aug 2016 20:45:17 -0400, wrote:


Right. Fuel, air, and a properly timed spark.
Not quite correct. You need fuel and air, comprssion and properly
timed spark

He no compression, no spark, working internal combustion engine:
https://www.youtube.com/watch?v=Zs56Cii3kdg

An engineer at Segway had a model engine he'd built that drew in and
condensed the hot gases from an external flame to operate the piston.
https://en.wikipedia.org/wiki/Vacuum_engine

--jsw

It looks like a really inefficient reinvention of the Newton steam engine.

Newcomen. Yes, it's a hot-gas version of a similar idea from Newcomen,
the earliest practical steam engines.

A lot of the early engines were vacuum engines -- the earliest hot-air
Stirlings and steam Newomen engines were vacuum types.

It was a while before they could use pressure beyond atmospheric
without blowing their heads off. d8-)

--
Ed Huntress