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View Full Version : Larsen Cycle RADAX engine - this is incredible.


Atlblkz06
05-09-2009, 11:56 PM
Holy cow this engine is incredible! The Larsen cycle RADAX engine is an 8-cylinder, "2-stroke" engine that puts out 300 HP with an efficiency range of 45 - 54 percent, which far exceeds conventional engines. Mel Larsen has claimed that his engine has set the word record for in thermal efficiency. The engine works on EIGHT power stroke per revolution. The dyno chart on this thing should be crazy!

http://fdp-bw.de/fdpbwblogs/lochmann/files/2008/05/larsen-radax-engine-lores-798920.jpg
Watch the VIDEO (http://www.youtube.com/watch?v=4Bps1TDvRLM)
IndianStig
05-10-2009, 12:13 AM
goodshit
Meatball546
05-10-2009, 01:14 AM
Very interesting. I'd very much like to see a rough diagram of the motion of it though... The video sounds really vague about how the reciprocating motion is converted into rotary motion. It's a good idea nonetheless. I hope to see it in production some day.
Atlblkz06
05-10-2009, 01:21 AM
Yea me too - but they explained it as a cam design. Think valvetrain - only backwards. The piston pushes on the gradient that you see - that rotates the output "disc" with the cam planes on it.
Bus Driver J
05-10-2009, 11:04 AM
A Boxer-styled 8 cylinder?? Drop that bitch in a Subby!!!
dorin48
05-10-2009, 11:12 AM
300hp and 900ftlbs on demand in a 220lb package... I'll take two please.
SixSquared
05-10-2009, 12:10 PM
Sucks it was stolen... apparently Larsen died last year, and while in the hospital dying, someone broke into his shop and took the running prototype, all his notes and data about it, his tools... literally stripped the shop. A lifetime of work gone. :(

It's incredible engineering. Absolutely incredible.
slostang
05-10-2009, 02:22 PM
id like to see it run.
Drummerboy
05-10-2009, 07:16 PM
when he says rotary cam, is that the same as any normal cam? It would make since because a cam rotates, but just wondering.
Cool Cat Racing
05-10-2009, 07:37 PM
Imagine a cylinder with what looks like rounded V's cut into its circumference. As the rods attached to the opposing cylinders goes front to back it has a mechanism that rides inside the V's. As this happens it turns the center drum, that's why it can spin either direction depending on which side is on its power stroke at any point in time.