Modified Rocking Engine

Gallery, Projects and General > Project Logs

<< < (10/21) > >>

bogstandard:
Nick,

You will get that back pressure on the return stroke because of it not having any valving.
It is the flywheels' job with the stored energy from the power stroke to overcome that reduced return pressure, and so keeping the engine running. It is a fine balance, but I don't think you will have any worries on that score, as long as there is a differential pressure.

Bogs

sbwhart:
This will be a runner Nick even if its upside down these little engines seem to be sensitive to orientation.

Could you post a pic of it up against a ruler to give us some idea of size.

Cheers

Stew

arnoldb:
Looking good Nick :thumbup:

I've not yet gotten my "baby" compared to your's rocker to run on breath power - flywheel's a tad too heavy. But after a couple of demonstrations to friends it seems more and more eager to do that; maybe just some run-in required, you could have a similar problem :scratch:.

Enjoying your thread :) might just have another case of :proj: coming up :lol:

Cheers, Arnold

NickG:
Bogs, good point, and I dare say there is more differential pressure than in a stirling engine of the same size so it should run.

Stew, will take a pic with a ruler, I always forget to put something in for scale. I know some people use coins, that is a good idea, will starting doing that ... if I can find any!

Arnold, I think it will get better with run in, as I haven't lapped the bore it's probably not as good as it should be so a bit of wear should help. If it doesn't run, then I'll pay more attention to that, it's pretty smooth anyway. I specifically designed it with quite a large bore to make it run on low pressure. So on mine the pressure isn't a problem, it's just the volume of air required to keep it going ... especially as on the rocking engine you lose a lot on the exhaust stroke!

So you should have :proj:!!! Most people have made one of these rocking engines now, if you don't you'll be the odd one out :lol: So go on ... get started!!!!

Nick

ps The start of my last post was meant to say, the pics were taken with the new camera I wen't halves with the wife on ... so please say they are far superior to the old just to make me feel better! £165 that cost me!!!

arnoldb:
:lol: :lol: Nick, Have done here :lol: :lol:
But I'm due for another secondary infection :doh: have to finish one for my one sister before mid October for her birthday; she just said "I want one" - and that sorted out the b-day gift :lol:

Cheers!

Navigation

 Message Index

Go to full version