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Author Topic: Honda gearbox  (Read 3624 times)
gm2
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« on: March 22, 2011, 01:16:02 PM »

was discussed off and on a bunch in Sepang 2 test but maybe needs it's own thread finally.

Here's a marginally scientific look at it.. interesting, as usual: http://motomatters.com/analysis/2011/03/19/honda_s_magic_gearbox_worth_a_few_hundre.html
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Triple J
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« Reply #1 on: March 22, 2011, 01:29:03 PM »

That's really interesting. Looks like Ducati needs to get to work on their gearbox!
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« Reply #2 on: March 22, 2011, 01:55:45 PM »

That's really interesting. Looks like Ducati needs to get to work on their gearbox!
Along with still trying to tame the slithering beast.
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« Reply #3 on: March 22, 2011, 05:04:48 PM »

Conservative estimates at .2 seconds/lap! Very impressive, HRC.
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« Reply #4 on: March 22, 2011, 05:24:45 PM »

"...based on or very similar to the Xtrac Instantaneous Gearshift System, which allows two gears to be engaged simultaneously, while driving only one."

I'm no tranny expert, but one gear being driven while two are engaged sounds a lot like an 'automatic' transmission where hydraulic/mechanical systems do the job of the driver (using a clutch and gearshift lever)...?
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zarn02
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« Reply #5 on: March 23, 2011, 12:39:19 PM »

That's an interesting read.

And I'm not sure what the FIM says about it, but I would assume it's still a "manual" so long as the rider has to use the lever to shift, the clutch off the line, and so forth.
« Last Edit: March 25, 2011, 06:46:29 PM by zarn02 » Logged

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« Reply #6 on: March 29, 2011, 04:07:43 AM »

^
+1

racing sure does drive innovation.

That's cool Cool
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« Reply #7 on: April 03, 2011, 07:42:24 AM »

Here's a pretty good guess of what technology Honda is using: http://www.sportrider.com/news/146_1104_honda_secret_motogp_rc212v_transmission_revealed/index.html
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« Reply #8 on: April 03, 2011, 02:26:44 PM »

Nice detective work  waytogo

Mind you, the whole point of disallowing double clutch systems was to keep costs down. Ironically, systems like this one are now becoming the system on choice on vehicles that used to use dual clutch systems (and it's just as expensive). And without the ability to handle downshifts under power or upshifts under engine breaking, I see an issue with using this on the street...

I wish Dorna would make up it's mind and either make an "unlimited" (except perhaps for weight, displacement and engine type) class where anything else goes.

Still, kudos to Honda for stretching the rules  Grin
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« Reply #9 on: April 03, 2011, 03:18:38 PM »

Odd that they're patenting racing equipment.

But back in the day when I was at Yamaha R&D, I saw lots of wacky stuff that Honda patented.

This looks a lot like a revision of a Hodaka trans from 40 years ago.  Tongue
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« Reply #10 on: April 03, 2011, 03:24:30 PM »

Mind you, the whole point of disallowing double clutch systems was to keep costs down. Ironically, systems like this one are now becoming the system on choice on vehicles that used to use dual clutch systems (and it's just as expensive).

Maybe that says something about eliminating specific technologies for the reason of cost?  Teams tend to adopt even more expensive alternatives.
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« Reply #11 on: April 03, 2011, 08:23:11 PM »

Yeah, there's a story from the '70s that when the AMA outlawed aluminum swing-arms due to the cost, some team simply went out and built a titanium swingarm  Shocked
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« Reply #12 on: April 04, 2011, 07:35:33 AM »

Someone on another list wondered if the Honda design makes it difficult/nearly impossible to push start after a crash...?
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« Reply #13 on: April 04, 2011, 07:45:20 AM »

Someone on another list wondered if the Honda design makes it difficult/nearly impossible to push start after a crash...?

there was a quote somewhere that said it does require 2 people to push start it after shut-off in that kind of event...

http://www.superbikeplanet.com/2011/Apr/110403rydernotes2.htm

Quote
.....Only one marshal tried to push start XXXXX, the rest ran back to their post after XXXXX had departed. Now the Honda's clutch, for whatever reason, requires a push start from two people. HRC know this but obviously see compensating advantages. ....

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« Reply #14 on: April 04, 2011, 08:32:02 AM »

Yeah, the rider in question was whining about mentioning the need for "two pins to push", post-race  Grin
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