wankel rotary engine

[zwaysfs]

IM sure its been done before prolly with little success, but what about the wankel rotary engine. Yes its a 4 stroke and they hate water but so do 2 strokes kawi and yamaha just fitted an air box to resist it. Water gunna happen no matter what. What if somebody designed a wankel that was premix say 750 or 800 cc this would eliminate an oil sump. IF designed to do so a wankel can run unlimited rpm and has a wayyy better hp and torque ratios. Im only bringing this up because as we all know with all the tree huggers 2 strokes are short for this world. Plus a wankel only has 3 moving parts. Wankels run HOT but thats in a car application cars dont have the luxury of pulling 70 degree or less water in them constantly. They can be smaller and made lighter and they can also be turbo or super charged. Im sure seedoo tried it but im also sure they tried to do it as cheep as possible with out throwing much r+d into the idea. Does anybody have imput. Have any of you tried it. What would you do with an engine that could run unlimited rpm.

 

[THRUST]

how heavy is it ? i current engine platforms only weigh 60lbs in freestyle it is all power to weight ratio so if you are going to increase by 40lbs you are no loosing power . plus i can only image how mch it would cost to devlope one to work in a production fasion and then spend 3 years getting everyone out there to believe in your work . nobody reallly has anywhere from15,000 to 100,00 to get a project like this started when there is already powerplants out there that produce enough power for the best riders in world to barely handle . great idea just this sport is not big enough . i did see a rotary engine in a sitdown and he had the intake and the exhaust going out side the ski .

 

[Big Kahuna]

Somebody in Mississippi shoehorned a Mazda RX7 rotary into an older GSX hull years ago.

 

[Superjet3]

A rotary will not work well. They are quite heavy as they have iron plates between each rotor housing. Also there would be no way to make it premix. The rotors basically fill with oil to cool them as well as the bearings are completely isolated from the intake charge. I do have mine setup for premix but that is only for the Apex seals. The motor also should not rev higher than 9k RPM unless there are extensive mods (lightened rotors and balanced)

 

[SuperJETT]

There are already small Wankels for aircraft that run well, but they are not cheap or very powerful compared to what we run already. Also, the eccentric shaft (crankshaft) doesn't line up so you'd need an offset gear drive which would make it heavier/more comples. Also, the torque isn't so great once you get small enough to fit a standup.

Great concept, but I did some moderate research into it a few years back and there are quite a few issues that make it not worthwhile.

The Norton AEIOOR is a 588cc Wankel twin rotor that makes 100hp @ 7000rpm.

Here's another source, though their's are heavy, the 180hp version weighs 240lbs http://www.rotaryengines.ca/main/aircraft.htm

Forgot about Freedom too http://www.freedom-motors.com/

And how about a bunch of these all in series? http://www.me.berkeley.edu/mrcl/mini.html

(I had all of this archived from years ago)

 

[Polish jet pilot]

Somebody put 1 in an X2 in england years ago. It was off a mazda and was turbocharged as I recon...

 

[ATS_Aaron]

Scott spotted an X2 with a rotary in it at Bob Norwood's (crazy turbo Ferrari builder www.bobnorwood.com ) shop in 2002.

1. They are 2 stroke...or at least closer to 2 strokes than 4 strokes. That is how they get 260hp out of a 1.3

2. Aircraft rotaries are designed for maximum reliability. I am sure we could give up some of that for a jet ski application.

3. Rotaries were originally water craft engines...that watercraft happened to be a TORPEDO and the original engine was designed for a lifespan was about 2 minutes.

Aaron