EXUP Worldwide

Here's a new approach to sportbike handling and braking ... counter rotating rotors. Looks promising. Finally, a new technology worth putting on my bike.

http://www.reverserotatingrotors.com/whyitworks2.html

Don

That's entertaining Don...................Hmmmmmmmmmm................
One of the bus fleets I worked on quite a bit had that same planetary set-up.
It made a lot of heat. (Did I mention it made a lot of heat)? Just in normal operation.
That planetary set works well as a reverse gear set, and they'll last a long time if the piece of equipment they're in is driven mostly forward..............
They tend to act as an oil pump with no pressure outlet when used in a constant tourque transfer application though.
In a 25 ton bus those gear-sets would eat thier planetary needle bearings, sieze the gears said needles were supposed to support, and explode the ring gears through the outside casing. It was quite impressive. And oily. And little bits of really hot sharp shrapnel went all over the place after the event too. It wasn't wear that killed them, it was heat turning the lube oil into tar. After so many overheat events they just had nothing left to effectively lube the gears. A really expensive parasitic cooler project was the only fix that would allow any significant mileage out of them. There goes un-sprung weight.
I don't see how they intend to do their cooling on that assembly.
I hope they've thought that out.
Hell, who knew?? we had 255 coaches all with that problem, and no one saw it coming.................I hope their effort goes a bit better..
I'll give them points for a novell idea, and I hope it does work - even though I would have liked to hear their thoughts on rocking couple side-to side-balance and a few other things. Final design implementation almost always has to clear a few hurdles first.

I saw that last night as well and thought...them needle bearings are in for a tough time....

ExupElvis wrote:That's entertaining Don...................Hmmmmmmmmmm................
One of the bus fleets I worked on quite a bit had that same planetary set-up.
It made a lot of heat. (Did I mention it made a lot of heat)? Just in normal operation.
That planetary set works well as a reverse gear set, and they'll last a long time if the piece of equipment they're in is driven mostly forward..............
They tend to act as an oil pump with no pressure outlet when used in a constant tourque transfer application though.
In a 25 ton bus those gear-sets would eat thier planetary needle bearings, sieze the gears said needles were supposed to support, and explode the ring gears through the outside casing. It was quite impressive. And oily. And little bits of really hot sharp shrapnel went all over the place after the event too. It wasn't wear that killed them, it was heat turning the lube oil into tar. After so many overheat events they just had nothing left to effectively lube the gears. A really expensive parasitic cooler project was the only fix that would allow any significant mileage out of them. There goes un-sprung weight.
I don't see how they intend to do their cooling on that assembly.
I hope they've thought that out.
Hell, who knew?? we had 255 coaches all with that problem, and no one saw it coming.................I hope their effort goes a bit better..
I'll give them points for a novell idea, and I hope it does work - even though I would have liked to hear their thoughts on rocking couple side-to side-balance and a few other things. Final design implementation almost always has to clear a few hurdles first.

I think the only thing I actually understood in all of that was "That's entertaining, Don"

Remind of this post in about 4 years when I get my AS in engineering...maybe then I'll understand it :laughing

I agree with all the comments regarding reliability. So far they have run it through the parking lot a few times at speeds up to about 25mph, and another low speed (70 mph) test. I'm interested in the results of a life-cycle test, sustained max speed testing, and high-speed braking. They may not have the materials perfected but the concept is intriguing. The front wheel takes a lot of load in high speed cornering and high speed braking. I'm expecting a few test failures. Hopefully they will stick with it until they get it perfected.

Don

The problem is all of the frictional losses ....
It's an interesting concept, needs a completely different approach though.
If you suspended a normal wheel an dthat wheel, spun them equally...the normal one would spin ten times at least longer.

He has caught the attention of Roadracing World. It will be interesting to see where it goes from here.

http://www.roadracingworld.com/news/art ... icle=25479

Motorcycle Equipped With Counter-rotating Front Brake Rotors Track Tested In Florida
Apr 16, 2006

From a Press Release

REVERSE ROTATING ROTORS PROTOTYPE TRACK TESTED

Fort Myers, Florida – Inventor Robby Kasten track tested his Reverse Rotating Rotors invention on Monday, April 10th at the Jennings GP race facility in North Florida. The purpose of the test was two-fold. First, to prove that it was mechanically sound at track pace, and secondly, to verify that it improved performance as claimed. It was a resounding yes on both counts.

The test was the first time that the prototype has been pushed to that extreme, and the system handled it without a complaint. With speeds in excess of 135mph, the real story is in how the motorcycle felt. The bike transitioned with a fraction of the effort of the stock front wheel. Coming off of the high-speed back straight at Jennings GP is a test of nerves and physical strength. With Reverse Rotating Rotors it is no longer a test of strength, only nerve.

"It was an amazing day," said Kasten. "The prototype seems to be bulletproof, and it improved the performance of the bike as predicted."


Don