Vodafone McLaren MP4-27 Mercedes

A place to discuss the characteristics of the cars in Formula One, both current as well as historical. Anything related to a specific race should go in the appropriate race thread.

Post Sat May 12, 2012 2:57 pm

GrizzleBoy wrote:Possibly, simply because the old nose on its own provided a lot of angle of attack.

The new nose now has almost the same angle going over the top and bottom with more pressure underneath it, which is going to cause lift and probably contribute to the "unbelievable understeer" than Button is talking about.


Not necessarily the case. The pressure will be lower underneath due to the higher speed of air under the nose.
If your theory was correct the sauber would take off in flight, looking on their nose.
For Sure!!
ringo
 
Joined: 29 Mar 2009

Post Sat May 12, 2012 3:10 pm

Hamilton seemed to not lack any understeer. More like a tiny bit of oversteer twice on his pole lap.

Button and his team probably got lost in the setup.
"Il Phenomeno" - The one they fear the most!

"2% of the world's population own 50% of the world's wealth."
Nando
 
Joined: 10 Mar 2012

Post Sat May 12, 2012 4:10 pm

raymondu999 wrote:Surely it's the nose to front wing rather than nose to the ground?


nose to ground. And also underside of cockpit to top of splitter.
The front wing chord is too short for the relative distance to the nose to be significant.
flow to the floor and through the barge boards ahead of the radiator is what they are improving.
For Sure!!
ringo
 
Joined: 29 Mar 2009

Post Sat May 12, 2012 5:31 pm

ringo wrote:
GrizzleBoy wrote:Possibly, simply because the old nose on its own provided a lot of angle of attack.

The new nose now has almost the same angle going over the top and bottom with more pressure underneath it, which is going to cause lift and probably contribute to the "unbelievable understeer" than Button is talking about.


Not necessarily the case. The pressure will be lower underneath due to the higher speed of air under the nose.
If your theory was correct the sauber would take off in flight, looking on their nose.

Why would the air under the nose be faster?
Owen.C93
 
Joined: 24 Jul 2010

Post Sat May 12, 2012 5:34 pm

ringo wrote:
GrizzleBoy wrote:Possibly, simply because the old nose on its own provided a lot of angle of attack.

The new nose now has almost the same angle going over the top and bottom with more pressure underneath it, which is going to cause lift and probably contribute to the "unbelievable understeer" than Button is talking about.


Not necessarily the case. The pressure will be lower underneath due to the higher speed of air under the nose.
If your theory was correct the sauber would take off in flight, looking on their nose.


Aeroplanes use higher air speed underneath the wing than above, plus an angle of attack that forces the air downwards under the wing to create lift.

The old McLaren nose was like an aeroplane wing with its front edge pointed downwards (for example, when an aircraft is braking hard and its nose dives, the wings poing towards the floor), which would create:

-higher pressure on top of the wing
-lower pressure underneath (drag)
-therfore, downforce.

The new McLaren nose now has a more neutral/balanced profile, more airspeed underneath it than it did before and the underside of the nose has more air pushing against it, where as there was more air pushing against the top of the nose before.

Considerably less downward angle of attack on the nose compared to before, plus more air speed and higher pressure underneath it than before.


You say that pressure will be lower under the nose due to higher flow of air under the nose, but you miss out the fact that the old nose created a higher pressure area at the upper front of the nose due to its downward angle of attack.

With that angle of attack almost made neutral, there is now less pressure on top than before and more pressure hitting the bottom of the nose that slopes downwards than before.

Less pressure on top surface of the nose than before + more air pressure on lower nose surface than before + considerably less (almost neutralised) downward angle of attack = Lift, surely?

Lift isn't going to be the net effect on the car for obvious reasons, but I don't see why the new nose wouldn't be creating more lift and therefore less downforce, than before.
Last edited by GrizzleBoy on Sat May 12, 2012 5:40 pm, edited 1 time in total.
GrizzleBoy
 
Joined: 5 Mar 2012

Post Sat May 12, 2012 5:40 pm

GrizzleBoy wrote:
ringo wrote:
GrizzleBoy wrote:Possibly, simply because the old nose on its own provided a lot of angle of attack.

The new nose now has almost the same angle going over the top and bottom with more pressure underneath it, which is going to cause lift and probably contribute to the "unbelievable understeer" than Button is talking about.


Not necessarily the case. The pressure will be lower underneath due to the higher speed of air under the nose.
If your theory was correct the sauber would take off in flight, looking on their nose.


Aeroplanes use higher air speed underneath the wing than above, plus an angle of attack that forces the air downwards under the wing to create lift.


It's the opposite way around. Faster air above = lift, faster air below = Downforce.
Last edited by Owen.C93 on Sat May 12, 2012 5:45 pm, edited 2 times in total.
Owen.C93
 
Joined: 24 Jul 2010

Post Sat May 12, 2012 5:40 pm

I'm gonna stop typing now.
GrizzleBoy
 
Joined: 5 Mar 2012

Post Sat May 12, 2012 5:44 pm

AnthonyG wrote:Gears in an F1 (and many other race cars) are mounted after one-another. (dogbox) In real life this means, it's quite easy to change the ratios in a short time.


You think? Note how the final drive is installed after the transmission section. Is that going to come off in a short time?

Brian
hardingfv32
 
Joined: 3 Apr 2011

Post Sat May 12, 2012 5:46 pm

GrizzleBoy wrote:I'm gonna stop typing now.

Lol ok. I think I agree with the other stuff you said, but I just don't think the air under the nose will be faster. I would say it creates lift.
Owen.C93
 
Joined: 24 Jul 2010

Post Sat May 12, 2012 5:55 pm

Anyway. Hopefully we will get more angles of this shot.

Image
Owen.C93
 
Joined: 24 Jul 2010

Post Sat May 12, 2012 5:57 pm

Not much marbles on the tires. Perhaps he´s well above the minimum weight?

Edit: might not be much to pick up now that i think about it..
Last edited by Nando on Sat May 12, 2012 5:59 pm, edited 1 time in total.
"Il Phenomeno" - The one they fear the most!

"2% of the world's population own 50% of the world's wealth."
Nando
 
Joined: 10 Mar 2012

Post Sat May 12, 2012 5:58 pm

Owen.C93 wrote:
GrizzleBoy wrote:I'm gonna stop typing now.

Lol ok. I think I agree with the other stuff you said, but I just don't think the air under the nose will be faster. I would say it creates lift.


Button,with the new nose on his car, was suffering understeer yesterday, and the car was unstable. This certainly implies that the nose was lifting. When the old nose was refitted, he went faster. Today, the new nose was refitted for quali, and Button is off pace again with handling problems.

So the altered airflow is obviously lightening the front end, and this can only be due to LIFT.
gilgen
 
Joined: 3 Apr 2010

Post Sat May 12, 2012 6:00 pm

gilgen wrote:Button,with the new nose on his car, was suffering understeer yesterday, and the car was unstable. This certainly implies that the nose was lifting. When the old nose was refitted, he went faster. Today, the new nose was refitted for quali, and Button is off pace again with handling problems.

So the altered airflow is obviously lightening the front end, and this can only be due to LIFT.


Hamilton had the same nose, explain that.
"Il Phenomeno" - The one they fear the most!

"2% of the world's population own 50% of the world's wealth."
Nando
 
Joined: 10 Mar 2012

Post Sat May 12, 2012 6:03 pm

stunning car, well balanced
Joie de vivre
 
Joined: 2 Sep 2010

Post Sat May 12, 2012 6:13 pm

Joie de vivre wrote:stunning car, well balanced

?

button might disagree
astracrazy
 
Joined: 4 Mar 2009

PreviousNext

Return to Formula One cars

Who is online

Users browsing this forum: Bing [Bot], briant1, csponton, mix2mix, Paul and 35 guests