ebay

I've always fancied one of these just as a 'toy', but something over

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Consider that the ferry charges to the IOW are not cheap, the reserve is probably over £500, so they start to look expensive, especially when you consider that running spares are not generally available.

It's a pity that Lurkers are not more forthcoming with their own posts, rather than sitting back and feeding on what others put in, and then throwing in some pretty stupid or deliberately provocative remarks on something that has already been discussed.

Peter

-- Peter A Forbes Prepair Ltd, Luton, UK snipped-for-privacy@easynet.co.uk

Interesting engines. I explored collecting an engine from IoW. Car + trailer would have been £160 plus a longish drive. Just not economic. ttfn Roland

I supected the opening bid might be pretty much all the money, nothing to say the reserve wasn't quite close by though. Are there many of these still running? Bet a pair of them would wow the crowds at the annual Thames Traditional Boat rally in Henley (home of S-T of course)!

BTW lurker to whom the comment was attributed has AFAIK never posted - Come on Mike you have plenty to say at club meetings, Ying Tong engines indeed!

Taking Ebay as just another auction I can't see the issue. SEM have articles on sales. Put two or more engine men together and sooner or later the subject of sales attended, and prices, comes up. regards Roland

Nice engines, and *very* rare. However they are NOT supercharged, but positively scavenged, he said, pedantically. There is a difference :-)

Regards

Philip T-E

I suppose if the level of scavenging is high enough, there will be an element of 'supercharging' included?

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

I think he was looking for quite a bit more than the start price :-(

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

Can anyone tell me how many cylinders these engines have?

I could add them to my Lister (Commer) TS3, and say I have a collection..... if only I could afford them.

Mark

Roland Craven wrote:

OK there may be a slight loss in pumping this additional air but it's a bit different from a spark ignition engine where fuel is also carried over with the air, in the diesel there is no loss of fuel so it is a less significant problem.

AJH (Andrew Heggie)

"Tim Leech" wrote >

Not with simple piston controlled exhaust ports, any 'extra' scavenge air just blows through.

"Mark Walker" wrote

Two power and two scavenge, see Peter's H2M pages:-

There will be some resistance from the exhaust system, though

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

"Tim Leech" wrote

Ok, perhaps just a little then ;-) But of course a restrictive exhaust sytem is the last thing a two-stroke needs. There is always the possibility of a tuned pipe such that the pressure wave launched when the exhaust port opens, arrives back at the appropriate time to 'plug' the port preventing loss of scavenge air. Certainly done on little revvy 'bike engines (reducing charge loss in this case), but effective over a very narrow speed range and probably in the realms of fantasy with this sort of thing.

On this general topic (small 2-stroke diesels) has anyone seen a Turner (Wolverhampton) 2-cyl 2-stroke recently?

Cheers Tim Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service

"AJH" wrote

Yes but the question was whether a piston ported two-stroke fed with an excess of scavenge air could be considered supercharged. To my mind 'supercharging' means that cylinder pressure should be above atmospheric at the beginning of the compression stroke and, barring a little back pressure from the exhaust system, this is clearly not possible when the exhaust port closes after the scavenge port.

That said, the two-stroke DKW motorcycles with a separate displacer cylinder fell foul of the post war 'blower ban' in motor sport. While that traditional 1920's remedy for asthmatic (four stroke) car engines, low pressure supercharging, probably barely made up for the pressure drop in the tortuous inlet manifold usually cast into the head!

I've never seen one at all, let alone recently. I wonder how many of them were actually produced? ISTR they werre a German design built under licence, with the metric dimensions imperialised (is that a word?) Not sure how good they really were.

Regards

Philip T-E

"Tim Leech" wrote >

Only ever heard of them in the context of an early diesel coversion for Land Rovers. Never actually seen one.

I think that was a 3-cyl version of the same thing.

I worked with someone who had one in a boat 30 years ago. No idea what happened to it, though. Neat little thing with, IIRC, a Roots blower.

Cheers Tim

Dutton Dry-Dock Traditional & Modern canal craft repairs Vintage diesel engine service