If you are trying to say that you are better off reducing mass with non rotating components then I really do not understand the logic.Jersey Tom wrote:Takes a certain amount of power to accelerate a given amount of inertia at a given rate. Lower the inertia, and you're reducing that power requirement. It's like getting extra free engine power to make the car accelerate faster.
My point is, for a lot of parts (ex: hub), the linear inertia can be much more significant than rotational.
Yes, you take any small gain you can.. but people make a big deal out of the fact it's rotating when on a relative order of magnitude comparison, it's not as big as some would indicate.
I guess the F1 rims being wider will have only little less rotational inertia than the 18+ inch rims.On the other hand one has to remember F1 is running still on very small diameter rims so rotational inertia from the rim is not as severe as on motorcyle or touring/sportscar 18/19´´.
I'm saying the same thing marcush is. Don't know how much simpler I can write it out.The_Man wrote:If you are trying to say that you are better off reducing mass with non rotating components then I really do not understand the logic.Jersey Tom wrote:Takes a certain amount of power to accelerate a given amount of inertia at a given rate. Lower the inertia, and you're reducing that power requirement. It's like getting extra free engine power to make the car accelerate faster.
My point is, for a lot of parts (ex: hub), the linear inertia can be much more significant than rotational.
Yes, you take any small gain you can.. but people make a big deal out of the fact it's rotating when on a relative order of magnitude comparison, it's not as big as some would indicate.
Like if I where given a choice to loose some weight in the uprights or the hub/wheel. I would definitely choose the hub because I loose the same amount of linear inertia while also gaining by "freeing up power" as you said.
Because they have poor behaviour in critical 'shock loading' situations. Once there's a crack you're fcked.scarbs wrote:Carbon fibre wheel are easily available for motorcycles, they seem durable although bikes don’t to clash their wheels each other or armco! the reduction in mass benefits acceleration and unsprung weight. I see no reason why carbon car wheels couldn’t be manufactured. They are of course banned in most forms of motorsport and motorcycling.
FSAE teams don't load their wheels nearly as much, apply far greater safety factors, don't have access to metal alloy forging capabilities and most importantly, FSAE teams don't race so the life cycle can't really be compared.Jersey Tom wrote:I know of at least one FSAE/FStudent team with very trick looking super light carbon wheels, where its a weight penalty. The thing doesn't hold air worth --- so they have to run a tube.
Man you need to see better FSAE teams.....SZ wrote: FSAE teams don't load their wheels nearly as much, apply far greater safety factors, don't have access to metal alloy forging capabilities and most importantly, FSAE teams don't race so the life cycle can't really be compared.
The FOS on my parts (according to FEA by von Mises criterion anyway) ranged from 0.98 to 1.15.SZ wrote:FSAE teams don't load their wheels nearly as much, apply far greater safety factors, don't have access to metal alloy forging capabilities and most importantly, FSAE teams don't race so the life cycle can't really be compared.Jersey Tom wrote:I know of at least one FSAE/FStudent team with very trick looking super light carbon wheels, where its a weight penalty. The thing doesn't hold air worth --- so they have to run a tube.
Then it's overdesignedJersey Tom wrote:Surprisingly enough the "0.98" part worked flawless and remained almost unchanged every year since I designed it. Good feeling.
.SZ wrote:On the contrary - I've seen championship winning FSAE teams. Good attempts at this problem and those poorer. Some students do do fantastic work, though less stress the important bit: FSAE teams do not race, and as such the life cycle is not comparable. A long way off.
(I'll leave out the other truths that might sound like criticisms, however) FSAE teams might have access to forged wheels but (correct me if I'm wrong) I'm yet to see a team turn out with a custom forged design in an alloy of choice pending their specific needs, which is par for the course in F1.
marcush. wrote:I´m trying not to offend anyone ,but FSAE is not even almost the holy grail of motorsport,
it is the starting point for students to get into racing. The mountain to climb is still ahead.
if you do it right they will look better.Conceptual wrote:What happens if you spray them with this?
http://www.vortexsprayliner.com/index.php
I wonder as to the strengthening aspect as well.noname wrote:if you do it right they will look better.Conceptual wrote:What happens if you spray them with this?
http://www.vortexsprayliner.com/index.php
you will also add, I think, unnecessary mass.
