Raises another important point about CVT.
You have to have high pressure to control the position of the "cones" for the drive.
( though if high I guess you can have "locking pins" that would remove the need for pressure during constant speed phases )
So as well as the losses in the chain(or belt) there is also the power lsot in the control.
One good thing about plain old gears is once IN place the mesh losses through friction can be minimised and don't change.
Anyone seen measurements of the latest CVT drivetrain losses ? I only find lots of guesses
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'
I am guessing though whatever the losses its gained back elsewhere, since the end measure, the MPG, is improving.....
The losses in conventional auto is not negligible also, between the masses of planetary gears and torque converter....The simplicity of the manual transmission is ultimately losing to not being able to get as much ratio in it....
University of Toronto Formula SAE Alumni 2003-2007
Formula Student Championship 2003, 2005, 2006
www.fsae.utoronto.ca
Guys,
I have a question about Slalom and Handling.
I have seen in some magazine tests that one car (A) has better slalom speed than another (B) but the car with less slalom speed (B) achieves higher score in handling rating than the car with more slalom speed (A).
How can this be possible?
I thought better slalom means better handling! It seems that I was wrong.
Please enlighten me.
slalom speed is objective, handling rating is subjective. Journos tend to favour cars with nimble handling (and RWD) over cars that go fast but still feel heavy (FWD). Point in case is the Citroen C6 which scored amazing slalom times, yet subjectively the handling was less appreciated, probably because of significant body roll.
"I find the whole business of religion profoundly interesting, but it does mystify me that otherwise intelligent people take it seriously." Douglas Adams
also slalom introduces a factor of repetitive weight change and if a car just happens to have the perfect spring and shock settings for rebound then that dampens the "swing" that builds up in a car that doesn't. Conversely a spring/damper arrangement that has a harmonic at the same frequency as the slalom swings will AMPLIFY it.
Why it's a stupid rating as both the settings above COUDL be ideal on open roads or horrendous on open roads, just they work for slalom. On top of that if any manufacturer has the chance they'll tweak so they get better results for each or "program" the computer controlled springs/shocks to counter ( though to be fair that's what they're doing in it anyway )
Personally I see it as it's obsession with NUMBERS instead of relying on skilled, GOOD, decent , honest journalists to evaluate and report. And there in lies the rub
I see it simply as a fall out from most of them being brought up hearing stupid statistics on EVERY aspect of the sports they watched and then believing that to the second decimal place these things are "accurate" pmsl
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'
Something else worth thinking about is the affect vehicle width has on slalom numbers. A wider car by default must move its CG more to the left and right to clear the cones. A motorcycle can do the slalom very quickly because it's narrow. I recall reading somewhere at some point that for an F1 car (presumably before the rules made them so narrow) to pull the same slalom speed as a Civic Si it had to pull something like 1.3G vs the Civic's .9. Please take those numbers as very poor recollections but the intent of the message is wider helps many aspects of handling but not slalom numbers.
^^^ good point
"A woman without curves is like a road without bends, you might get to your destination quicker but the ride is boring as hell'
Just curious, how would you "chrome" color a car? Is it just a vinyl wrap thing?
that's the most common way, yep.
Andreas Preuninger, Manager of Porsche High Performance Cars: "Grandmas can use paddles. They aren't challenging."
There are also a couple of 'chrome' paints,for example as used by McLaren in their F1 cars
Chief of Secret Police and CFO - Brotherhood of Jelly
No Mr. Craig, I expect you to die! On the inside. Of heartbreak. You emo bitch
I read in a magazine about the handbrake of Hillman Avenger.
It said:
"The handbrake is very effective and holds easily on 1 in 3."
What does it mean by 1 in 3??
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