Topic: Cool Blower engine concept

[754]

Just saw this somewhere, just got enough info to search it.
  Fellow by the name Bart Crauwells took a 1000 Ducati engine. Turned rear cylinder into a supercharger feeding the front cylinder,the net result. Being 102 hp from under 90.
 Now this makes me think, if you built a 750 to 1000cc, used the inner cylinders. (or 1 +3) as the blower , it would be a cool running motor.
 To see it search his name and supercharger.

[Sam Green Racing]

DKW did it in the 50s frank.

Sam.

[754]

You mean on the v3......... The rough basis of the H1 motor...?

[afkrejci90]

This is interesting, I wonder if it could work on car engines too.

[H2Eric]

DKW did it in the 50s frank.

Sam.

I think it was the mid 1930's Sam, a bit before my time, but surely you remember. Ewald Kluge won the 1938 lightweight (250cc) Isle of Man TT on one. A fiendishly clever idea and a two-stroke at that.

Eric

[Tintop]

Definitely the 30's H2Eric.  Inside of the 1936/38 IoM 250 -

[754]

I think they had a V3. Triple, the lone one in the centre, pumprd the Air to the other two..

[Tintop]

It's a two stroke 754.  The big piston laying horizontal pumped air into the crank case to feed a compressed fuel charge into the twin water cooled cylinders.

[754]

I think we are talking two different motors.

[Tintop]

Probably, the picture is of the 1938 DKW that H2Eric referred too.

[Sam Green Racing]

Yes, It's me getting at crossed purposes, the 30s 250 was the compressor, the 50s was just a V3 350.

Sam.

[754]

So the v3 all cylinder were Hot ?..was not sure but was aware that it influenced the H1. Design basis..

[Tintop]

Actually it had more influence on Honda's V3 2 stroke GP bikes.  DKW 's were basically two vertical cylinders with rear mounted side draft carbs, and a horizontal front cylinder with a down draft carb.  We had a DKW car in the early 60's, similar shape to a VW Beetle.  It was a 2 stroke that would blow the doors off a VW.

[turboguzzi]

the dkw v3 was a conventional, i.e. not supercharged two stroke twin  (Yamaha RD style) + an extra horizontal cyl added between the two upright cyls. + supercharging was banned after WWII .....
there's a pretty crazy guy named ellwood who raced a sort of "six stroke" single in supermono, essentially using the volume UNDER the piston as a supercharger for the top part. there was plenty o'tubing all over the place ....

[Tintop]

Correct TG, we covered which where the DKW supercharged / NA versions a couple of posts back.  Super charged pre WW2 (banned after, along with the BMW super charged flat twin, and AJS twin), V3 from around 1952/3.