Walter Kaaden's 1962 125 cc racer was the first internal combustion engine to reach 200hp per litre. A simple two stroke single with rotary valve intake, and two transfer ports. The magic, the expansion chamber exhaust, is not shown in the drawing. Below a lineup of experimental exhausts used in the development process.
I hate to be pedantic (well, not really) but I think the heading should say 'MZ' instead of 'MV'. Also, Walter Kaaden produced the first unsupercharged, petrol fuelled engine to reach 200hp per litre. 'Stealing Speed' is an amazing story, highly recommended.
I wondered if the pre-war DKWs might have claimed the title but the best figure I could find was a tantalisingly close 49hp for a record breaking version. "In October of 1937 Auto Union prepared several modified, alcohol-burning versions of the URe singles and twins to contest several speed records. Kluge and teammate Walfried Winkler rode the highly tuned machines: the 250 produced 49 hp, while the 350 shrieked out 60 hp." https://www.odd-bike.com/2014/02/dkw-supercharged-two-strokes-force-fed.html
I hate to be pedantic (well, not really) but I think the heading should say 'MZ' instead of 'MV'. Also, Walter Kaaden produced the first unsupercharged, petrol fuelled engine to reach 200hp per litre. 'Stealing Speed' is an amazing story, highly recommended.
ReplyDeleteOoops, typo! fixed...
ReplyDeleteNow I'm trying to find the first engine, super or turbocharged, gas or alcohol to make 200hp per litre.
ReplyDeleteHeh. I knew those diagrams were from Jennings the instant I saw them. I wonder what that means?
ReplyDeleterdguy
It probably means you got addicted to blue smoke as a teenager!
ReplyDeleteI wondered if the pre-war DKWs might have claimed the title but the best figure I could find was a tantalisingly close 49hp for a record breaking version.
ReplyDelete"In October of 1937 Auto Union prepared several modified, alcohol-burning versions of the URe singles and twins to contest several speed records. Kluge and teammate Walfried Winkler rode the highly tuned machines: the 250 produced 49 hp, while the 350 shrieked out 60 hp."
https://www.odd-bike.com/2014/02/dkw-supercharged-two-strokes-force-fed.html