We have asked them for their FEA stress analysis data and for how long
they have had an engine running continuously at max load. This company
appears to have licensed the 6 cylinder / 25 HP engine, and have a few
interesting videos: www.steamenginepower.com
http://www.youtube.com/watch?v=fdikr5nBLxA&feature=mfu_in_order&list=UL
There doesn't seem to be much cylinder movement with this arrangement.
http://www.youtube.com/watch?v=8Jk3yU_iUfs&feature=mfu_in_order&list=UL
Maintenance" video that lets you get a good idea of the size of the
unit. The hardened / anodized aluminum cylinders with a simple O ring
seal piston doesn't impress me but then I have not seen the specs and
what reliability tests they have done.
On 12/6/2011 7:37 PM, Robert Lynn wrote:
As someone who has worked on, and has a number of patents on Z-Crank
type engines I would not recommend buying one of these "green" steam
engines. The design/construction appears to emphasise appearance over
function and doesn't look like it will operate reliably for more than
10-100 hours. In particular the open unlubricated design is not
sensible - unlubricated spherical bearings do not work reliably in
wrist joints over extended periods of running with the high loads that
such engines have, they are extremely likely to be a big ongoing
maintenance hassle. Also very large bearing overhangs on thin shafts
in an open space frame that lacks diagonal bracing is not good for
bearings, and the torque reaction method (to stop the "spider"
spinning) does not look at all durable either.
To me the engineering all appears rather amateur, and while probably
fine to run as a demonstrator for a few hours I would not be relying
on it to run for any length of time.
A normal crank mechanism steam engine might not look as cool, but it
is far more likely to give you long term reliable running.
On 6 December 2011 03:34, Aussie Guy E-Cat <aussieguy.e...@gmail.com
<mailto:aussieguy.e...@gmail.com>> wrote:
This piston based steam engine looks very doable and market ready
for a home CHP plant: http://www.greensteamengine.com 1,500 rpm.
10 HP (~6.5 kW.e) at 125 psi steam or 4 HP at 50 psi steam. $1,995
for the commercial 2 cylinder unit without a generator. Ok needs a
control system to hold Ac cycles at 50 / 60 Hz but that will not
be hard to build.
