Engine Capacity

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Gotta admit, the sound on that Stoner clip was a shocker ....... but mainly cos the slipper clutch makes a hell of a racket!



Do you have any where rossi is at one revs for a longer period?

They were all taken at Jerez, at the end of the back straight, so that's all I've got, I think. I'll have a rummage, may have something from Qatar.
 
A while back Noyes tweeted that he strongly suspects Honda is not running a bike close to 1000cc. The posted specs are meaningless, and he suggested they're intentionally misleading.
 
A while back Noyes tweeted that he strongly suspects Honda is not running a bike close to 1000cc. The posted specs are meaningless, and he suggested they're intentionally misleading.



Honda oppose any rules that require the bikes to be redesigned. Honda do not oppose a rev limit for 2013. What does that tell you about Honda's engine capacity?
 
Honda oppose any rules that require the bikes to be redesigned. Honda do not oppose a rev limit for 2013. What does that tell you about Honda's engine capacity?



That must a recent stand, since they have been behind all changes requiring re-design from 2000 on..
 
That must a recent stand, since they have been behind all changes requiring re-design from 2000 on..



They only lost control of the rules recently.



The fans will also have trouble determining the capacity of the motorcycles b/c we know the manufacturers can change displacement. Ducati ran the 2012 engine in 2011 as an 800cc. Perhaps the other manufacturers can do the same thing. Difficult to say.



One way or another, if Honda support a rev limit but not redesigning the bikes, the RC213V engine is designed to operate at 1000cc already.
 
Why do they risk testing in Europe when the weather there is so unpredictable and usually ....? Just about every other test is ...... over by weather. It seems the best bet would be to schedule test at places with stable weather and pay the extra money to fly to these places. What good is it to spend all your money going to a place where its a 50/50 you'll get anything done? Just stupid. Come test in SoCal, the perfect weather capital of the world.



rant over
 
Why do they risk testing in Europe when the weather there is so unpredictable and usually ....? Just about every other test is ...... over by weather. It seems the best bet would be to schedule test at places with stable weather and pay the extra money to fly to these places. What good is it to spend all your money going to a place where its a 50/50 you'll get anything done? Just stupid. Come test in SoCal, the perfect weather capital of the world.



rant over



"Hey, Luigi! Did you bring that rear subframe?"

"Which one?"

"The CF one which is 5mm higher than the standard one."

"Does it have x7y6 stamped on it?"

"No, says here it should have x7y9 stamped on it."

"Oh, ..... Picked up the wrong one. I'll drive back to Borgo Panigale and pick it up. Be back by this afternoon."



That's why.
 
"Hey, Luigi! Did you bring that rear subframe?"

"Which one?"

"The CF one which is 5mm higher than the standard one."

"Does it have x7y6 stamped on it?"

"No, says here it should have x7y9 stamped on it."

"Oh, ..... Picked up the wrong one. I'll drive back to Borgo Panigale and pick it up. Be back by this afternoon."



That's why.



<
....... Luigi.
<




Anyway, thanx for reporting on the "wash out".

http://motomatters.c...t_weather_.html



Well, if Luigi can get a parts list together and into the truck, they won't be disappointed in Cali.

13458:perfect weather all the time!.PNG]
 

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Where are they going to test? Fon-.......-tucky? I'll take Mugello in a hailstorm, thanks.

Willow Springs.

http://www.willowspringsraceway.com/



Or they could go up to Laguna. Its nice up there too.



Btw, curious question I've meant to ask you. Is there any reason why Randy DePuniet has never ended up riding for Hervé Poncharal? Just wondering if its ever been considered. No real good reason for asking just that Frenchys seem rare in GP and both these peeps together could probably do something noteworthy for their proud nation.
 
They were all taken at Jerez, at the end of the back straight, so that's all I've got, I think. I'll have a rummage, may have something from Qatar.



I'm seeing the difficuties involved now. Unless you can get someone revving the guts out of the ducati in a totally anechoic environment ( can you get the yellow army to bring a pillow each and hold them up?
<
<
) .

I had an acquaintance some years ago, an electric violinist who as a sideline recorded sounds for video games. He did some of the sounds for one of those car games ( GTrismo? Need for Speed? .... type of game ). He was saying how hard it was to get a good recording of just an engine sound. They set up in the middle of some airstrip in England with absolutely no other noise and he said it was still hard to get right. I just thought he was being a bit "primadonarish"
<
<
<
And those games use an algorithm to create the sound too in the end!! Crikey!
 
damn it sounds like the Honda is reving more than the Ducati.



Thats just big bang v's screamer, When I get a chance I'll post a wave form of each, might be interesting so folk can get a better idea of big bang v's screamer. Basically, with the big bang, as Duc seem to have it configured, they seem to have 3 cylinders firing close together ( blending into one sound to the human ear ) ...... pause ...... the last one fire ..... pause ....... repeat ..... and two revs have occured for what sounds like 2 uneven fires.

The honda is: fire ........ set pause ....... fire ..... set pause ....... fire ...... set pause ....... fire ...... set pause ....... repeat ..... during the two revs it sounds like 4 even fires have occurred.



Thanks Krop I'll look at that, so long as its fairly in sync the vid should be helpful.
 
Honda: from 2:08, right before he shifts.



325 samples at 44,000 per second

= .00739 ms

= 135 bangs per second

= 8100 bangs per minute

= 16,200 RPM.



EDIT Sample rate is actually 44,100 Hz with a resultant RPM of 16,283



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Honda: from 2:08, right before he shifts.



325 samples at 44,000 per second

= .00739 ms

= 135 bangs per second

= 8100 bangs per minute

= 16,200 RPM.





13467:Honda.jpg]



Great work that man! About right. Nice, conservative Honda engineering. And so far inside the performance envelope that Honda might even be running at less than the maximum bore, going for torque instead of HP. they've done that in Moto3.
 
Ducati: from right before he shifts to top gear, also on the front straight.



306 samples at 44,000 per second

= .00695 ms

= 144 bangs per second

= 8627 bangs per minute

= 17,250 RPM.



EDIT Sample rate is actually 44,100 Hz with a resultant RPM of 17,294



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The Duc was a hard one to interpret. The individual pulses vary quite a lot in amplitude. The best 'tell' I could find was the ascending 'staircase' feature.



I'll go back and watch the Eurosport qualifying vid, in search of on-board sounds during a proper hot-lap.
 

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