Great information Professor. Not at all intuitive that doubling the friction plate results in twice the clamping force which results in doubling the torque capacity. Thanks for sharing!
Here’s another way of representing it mathematically from a good Friend 🙂 Clamping Force (single clutch disc): F=P×A Where: F = clamping force P = applied pressure A = surface area of friction plate For a dual-disc clutch: F(dual) = P(dual) x A(dual) Where: F(dual) = clamping force of the dual-disc clutch P(dual) = pressure applied by the dual-disc clutch (which is the same as F(single)) A(dual) = 2A, the combined area of two equal clutch disc surfaces Since P(dual) = P (same pressure applied), then F(dual) = 2F (double the clamping force) Torque Capacity: T (dual)= F (dual) × r Where: T = torque capacity r = radius of clutch surface disc Since F(dual) = 2F(single), then T(dual) = 2T (torque capacity has double)
whether you like it or not, wider tires grip better. many have made researches about that and they were shocked to prove that wider tires wouldn't make a difference with larger surface contact. but that has been said theoretical, however practically it doesn't apply. running a 225/55/17 wheels tends to lose grip during accelerating in a straight line rather than 275/30/19. some might say it is an unsprung weight. i say it is a larger surface patch. next time try running a 185 wheels on a drag car instead of wide slicks with no groves for increased surface contact and see how it goes. gripping on slippery ground with just your ankle as contact point has lower chance to grip than your whole foot.
There's a lot to it for sure! It's just interesting that practical physics formulas don't say they will even though they do. And the key is in the term "sticky" tires, lol... I'll see about doing a full video on the explanation of why they do! Thanks for watching! We hope you enjoyed it :)
Unfortunately you misspoke at 4:03 and I think your block analogy went a little awry after that. You said "doubling the pressure and the surface area still gives us the same pressure" when you meant doubling the force. Honest mistake, but it was compounded by going back to your block analogy immediately afterwards. In reality, the pressure is being kept a constant by the pressure plate, you're doubling your surface area over which this same pressure is applied by stacking your discs, and therefore the force is doubled. In this case, it's like attaching an identical block *to the side* of the original one on the table (increased surface area in contact with the table but same pressure); placing it on top of the original block (same surface area in contact with the table but increased pressure) would be like increasing the pressure of the pressure plate with stronger springs or moving the fulcrum point. Same net result at the end, but the mechanism of action differs in both the torque capacity of the clutch as well as the block example.
Well put and good catch! It's kind of an odd one comparing it vs. the block and f=un equation since you're able to double the force without doubling the force or clamping load of the pressure plate. They end up sharing the clamping load without losing anything. neat trick!
@@rafyg I love the dual disc clutch in my Blue 996tt. So did RoadsUntraveled when they drove it for the video "we found a 1,000hp Porsche 911 turbo where you'd least expect it"
Great information Professor. Not at all intuitive that doubling the friction plate results in twice the clamping force which results in doubling the torque capacity. Thanks for sharing!
Lol, yeah, it takes a bit to wrap your head around that one :) Next week you get to see how to upgrade single to a dual disc Proto Clutch!
Here’s another way of representing it mathematically from a good Friend 🙂
Clamping Force (single clutch disc): F=P×A
Where:
F = clamping force
P = applied pressure
A = surface area of friction plate
For a dual-disc clutch: F(dual) = P(dual) x A(dual)
Where:
F(dual) = clamping force of the dual-disc clutch
P(dual) = pressure applied by the dual-disc clutch (which is the same as F(single))
A(dual) = 2A, the combined area of two equal clutch disc surfaces
Since P(dual) = P (same pressure applied), then F(dual) = 2F (double the clamping force)
Torque Capacity: T (dual)= F (dual) × r
Where:
T = torque capacity
r = radius of clutch surface disc
Since F(dual) = 2F(single), then T(dual) = 2T (torque capacity has double)
seems easy enough (:
@@sammybalamby probably too easy for a Math Major!
This was an amazing informative video, y’all are going places. Thanks for taking the time to make this
You're welcome. Next week we have a POV on how to upgrade from the Sachs st3 to our dual disc clutch :)
Our pleasure!
we appreciate the support! 🙏
@@toddknighton I love it, I look forward to all the upcoming videos 💪
@@mwoodall13 feel free to send requests :)
Great informative video!
🙂 Thank you.
Glad you enjoyed it!
I didn’t need this info, but I throughly enjoyed learning about it.
Thanks... So, whati info do you need?
BTW this Sunday will be how to upgrade from a single to a dual disc clutch if that's more to your liking 😊
@@protomotive just sayin a was scrolling and you popped up so I watched it. But I’ve already got a duel disk that I’m putting into my town car
@@remaudy6409 oh nice! That must be one helluva town car!
@@protomotive oh man dude it’s so fun to drive
Another fantastic upload. Keep them coming Todd 👍🏼
You're very welcome! And we'll keep trying! 😊
Now that was a F=un video, lol :) Loved it!
Glad you enjoyed it!
who says math can't be f=un? 😝
@@sammybalamby you're so punny :)
whether you like it or not, wider tires grip better. many have made researches about that and they were shocked to prove that wider tires wouldn't make a difference with larger surface contact. but that has been said theoretical, however practically it doesn't apply. running a 225/55/17 wheels tends to lose grip during accelerating in a straight line rather than 275/30/19. some might say it is an unsprung weight. i say it is a larger surface patch. next time try running a 185 wheels on a drag car instead of wide slicks with no groves for increased surface contact and see how it goes. gripping on slippery ground with just your ankle as contact point has lower chance to grip than your whole foot.
There's a lot to it for sure! It's just interesting that practical physics formulas don't say they will even though they do. And the key is in the term "sticky" tires, lol... I'll see about doing a full video on the explanation of why they do! Thanks for watching! We hope you enjoyed it :)
And those big meats just look amazing :)
Amazing video 👍🏽
Thank you 🙌
Unfortunately you misspoke at 4:03 and I think your block analogy went a little awry after that. You said "doubling the pressure and the surface area still gives us the same pressure" when you meant doubling the force. Honest mistake, but it was compounded by going back to your block analogy immediately afterwards. In reality, the pressure is being kept a constant by the pressure plate, you're doubling your surface area over which this same pressure is applied by stacking your discs, and therefore the force is doubled. In this case, it's like attaching an identical block *to the side* of the original one on the table (increased surface area in contact with the table but same pressure); placing it on top of the original block (same surface area in contact with the table but increased pressure) would be like increasing the pressure of the pressure plate with stronger springs or moving the fulcrum point. Same net result at the end, but the mechanism of action differs in both the torque capacity of the clutch as well as the block example.
Well put and good catch! It's kind of an odd one comparing it vs. the block and f=un equation since you're able to double the force without doubling the force or clamping load of the pressure plate. They end up sharing the clamping load without losing anything. neat trick!
yeah, I get a little tongue tied. I see it in my head, but getting it out can be a bit challenging! Either way I hope you enjoyed it!
"Lasts longer", "doesn't slip"
DPS6 "haha watch this"
Ouch, I see Ford had a bit of a battle with that one!
But does it still feel gradual like oem?
Yes. And we cover that and much more in our next video on upgrading from a Sachs st3 to a Protomotive dual disc clutch. It'll come out next weekend :)
@@protomotive beautiful!
@@rafyg I love the dual disc clutch in my Blue 996tt. So did RoadsUntraveled when they drove it for the video "we found a 1,000hp Porsche 911 turbo where you'd least expect it"
Absolutly :) I have one and you could swear it's a stock clutch by the pedal feel. :) But can handle 1000hp easily!
It’s a must have clutch for Porsche owners
We have yours here waiting for you! :)
Awesome clutch ❤
Thanks! Yes, they've become the "go to" for street high powered 996 and 997 Turbos. Even 993 and 964 Turbos are benefitting as well :)