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Jones 1942 supercharged two stroke (!!) flat four. The Norton colours are misleading but maybe a Norton frame?

Found this link: http://www.eriksbikeworld.com/index.php/bikes/vintage-racers/25-supercharged-period-4-cylinder-racer

Blimey! He's a fair chap. That is special :thumbsup: . Wonder what power it made? Funny how many innovative designs there were around over the years here in UK, but nothing really stuck in mainstream British manufacture & factory racing - whilst others (Italian/German etc) were doing all sorts of stuff. I mean we were racing singles still against the Gilera multis etc & stuff that was innovative never really got a good run - say the Roarer or whatever - but then I suppose the same could be said of Guzzi with the V8, so maybe it's not just us. Longterm, maybe mainstream is the only viable product, & innovation just dripfeeds into that. Sometimes it gets me pissed when you see every week in MCN the latest "special" from some boutique custom shop, which is a few is chopped parts & a paintjob.

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having had turboed bikes and being a stroker fan... I fail to see how forced induction can work on a T2. A 2 strokes fuel mix cirulates the crank bottom end if that was under pressure shit could go bad, also the way a chamber works needs to happen naturally, ie: fumes exit the port with the shock wave the next batch of fuel follows the shock/sound waves bounce of the revers cones and pushs the fuel back in to burn the fumes excaping. 

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having had turboed bikes and being a stroker fan... I fail to see how forced induction can work on a T2. A 2 strokes fuel mix cirulates the crank bottom end if that was under pressure shit could go bad, also the way a chamber works needs to happen naturally, ie: fumes exit the port with the shock wave the next batch of fuel follows the shock/sound waves bounce of the revers cones and pushs the fuel back in to burn the fumes excaping.

 

I think the blower replaces the crankcase induction of your normal two stroke. Exactly how, would take a better engineer than I could ever be to explain.
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Search for split-piston, u-cylinder and other terms you'll find in these findings. As you said, a standard stroker can not make any reasonable use of a blower.  But looking at the pictures of the crankshaft of this particular bike I guess without a blower it wouldn't have made one single burp at all. It would be interesting to read something about how he managed to start it.

Nice peace of craftmanship, nonetheless.

 

Hubert

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  • 2 weeks later...

and this . . . ?

MG LeMans 1380cc 140hp... well thats what they reckon, dont think its real yet.

 

I like it but the skinny arse end that is typical these days be good to bring the LM name back but would be a bugger in one was as mine wouldent be the very very last LM any more.

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