Horrible BMW Crash in Florida!!
#23
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Originally Posted by EuroCarFan' post='523820' date='Jan 28 2008, 10:47 AM
I think he only posted in one thread; the one where he asked how to program the car to max settings. I believe they closed the thread but it's not deleted.
#26
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My Ride: 2005 545i with Sport Pkg, Nav, HUD, Cold Weather Pkg, Rear Shades
By no means I mean to take away from this tragic incident, and the turmoil their families are going through. But, nevertheless, this accident got me thinking. about the speed of the car when it actually left the embankment.
1. It doesn't matter what top speed they attained. The skid/yaw marks indicate that they tried to stop, but were unable to.
2. To calulate this speed, I had to ask my friend for help, who came up with this:
Here's the speed of the car as it left the embankment: approx 65 mph. How was this arrived at?? read on.....
1. Compute time to fall 70feet (25 meters). This is the difference between at 80ft high embankment , and the car struck the tree at a height of 15ft.
s(distance) = Initial Velocity x time + 1/2 * Acceleration * t^2
25 = 0* t + .5 * 9.8* t^2
t = 2.25 seconds
2. compute velocity to travel 200ft in 2.25 seconds.
s(distance) = Initial Velocity x time + 1/2 * Acceleration * t^2
66.6 meters = Initial V x 2.25 + .5 * 0 * t^2
66.6 = init V x 2.25
v = 66.6 /2.25
v = 29 m/s
v = 104400 m/hr = 104 kph = 65 mph
So you will see that all it took was 65mph which is not too fast.
Just as the other have said..... Please, Please, be careful.
1. It doesn't matter what top speed they attained. The skid/yaw marks indicate that they tried to stop, but were unable to.
2. To calulate this speed, I had to ask my friend for help, who came up with this:
Here's the speed of the car as it left the embankment: approx 65 mph. How was this arrived at?? read on.....
1. Compute time to fall 70feet (25 meters). This is the difference between at 80ft high embankment , and the car struck the tree at a height of 15ft.
s(distance) = Initial Velocity x time + 1/2 * Acceleration * t^2
25 = 0* t + .5 * 9.8* t^2
t = 2.25 seconds
2. compute velocity to travel 200ft in 2.25 seconds.
s(distance) = Initial Velocity x time + 1/2 * Acceleration * t^2
66.6 meters = Initial V x 2.25 + .5 * 0 * t^2
66.6 = init V x 2.25
v = 66.6 /2.25
v = 29 m/s
v = 104400 m/hr = 104 kph = 65 mph
So you will see that all it took was 65mph which is not too fast.
Just as the other have said..... Please, Please, be careful.
#27
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Does this not assume (wrongly) that the car weighed virtually 0, and had no air resistance? at 65mph I'd expect it to jump a little then run down the embankment, not fly 200ft, that seems way too low. But then I'm no mathematician.
#28
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My Ride: 2008 Silverstone II E60 M5 2012 E70 AW X5 50i Sport w/ LCI Aero Kit and Rocker Panels
Aside from this being a really, really sad story, especially after seeing the pictures of all 5 boys, the fact that this kid posted that thread on M5Board 6 hours prior to his death is really crazy. I shared this story with my wife, who knows I frequent M5Board, and she was totally freaked out. Especially the reply where one member says "You will end up on the News".
#29
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My Ride: 2004 545i, 6-speed Manual, Silver Grey Metallic, Grey Dakota Leather, Cold Weather Pkg, Premium Sound Pkg, Sport Pkg, Lumbar Support
Originally Posted by MiamiPhill' post='523777' date='Jan 28 2008, 07:17 AM
I have thought of this myself, as a way to prevent valets and the like from doing some nonsense with ones car,
Here's the link, http://www.zr1netregistry.com/ZR1_about.htm
#30
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My Ride: E60 M5, F85 X5M
This one was especially eerie:
"I completely understand where you are coming from, assuming that I am irresponsible...that is definitely understandable. I do sometimes make bad decisions but I am young and I do drive safe and I will not endanger the lives of others."
"I completely understand where you are coming from, assuming that I am irresponsible...that is definitely understandable. I do sometimes make bad decisions but I am young and I do drive safe and I will not endanger the lives of others."