Unofficial Royal Enfield Community Forum

General Discussion => Campfire Talk => Topic started by: Chasfield on October 13, 2009, 07:51:23 pm

Title: Sleeve valve motorcycle
Post by: Chasfield on October 13, 2009, 07:51:23 pm

Here is an interesting machine, the Grindlay-Peerless:

http://www.realclassic.co.uk/grindlaypeerless.html

I read a write-up in a bike mag on one of these. No valve clatter - all you get is a nice fat exhaust beat from the Barr and Stroud sleeve valve v-twin engine.

Maybe Ace would fill us in on the pros and cons of that technology.

Title: Re: Sleeve valve motorcycle
Post by: woodboats on October 13, 2009, 08:13:58 pm

Workings aside, that is a thing of beauty!
Good find.

Title: Re: Sleeve valve motorcycle
Post by: 1Blackwolf1 on October 13, 2009, 08:42:39 pm

  Nice old scooter.  I'm also interested in the internal workings/lack thereof.  Sounds almost like some sort of reed induction system.  Will.

Title: Re: Sleeve valve motorcycle
Post by: ace.cafe on October 13, 2009, 09:18:35 pm

I'm not really familiar with the sleeve valve, but from an initial glance at the design in Wiki, it seems to have alot of moving mass, and a large surface area for friction.
They say some good things about it for advantages, especially Ricardo, so that's in its favor.

I'd have to play around with one before I made any specific comments, and being able to do that probably isn't going to happen.