
But wouldn't you prefer a nice Paxman Valenta as originally fitted to the HST? They were diesel bliss and not quite so smoky!
Best of all though is a Deltic

Moderators: RichardW, myglaren
Hell Razor5543 wrote: ↑31 Aug 2017, 22:46Talking about opposing pistons, there is a gentleman in Thatcham called John Wiscombe. He developed an unusual spring powered air rifle that was phenomenally accurate. This was because it had two pistons heading towards each other down the cylinder. This resulted in a spring air rifle without any recoil. I did meet JW a long time back, when I was a field target rifle shooter;
http://www.americanairgunner.com/whiscombe-air-rifle/