Yes I know it is not Ferrari but it is a really cool video. Hope it is not a repost: http://www.chartersventures.com/car/bencoupe/fifthgearf1.wmv It is about 15 minutes long so be sure to book the time off
That was a good bit of fun. I hadn't seen it before so, thank you. The most interesting bit for me was on the F1 driver training.
When Tiff Needel is blown away by a car, you know it's something special. He's driven practically everything, and the F1 car is head and shoulders above it all. Reminds me of when Jeff Gordon got in one, he was dumbfounded about the amount of negative g's those cars can produce.
Great video...well worth watching a couple times even. Whats great is the F1 car absolutely destroys the M5, and thats not even being driven by an F1 pilot. Imagine how much more off the pace the M5 would have been with a real pro at the wheel. Mark
Tiff is sort of a "real pro". He used to race F1 cars way back, and has driven them on several occasions since then. (a particular mid-90's top gear episode comes to mind when he and clarkson pitted the F50 against a 1990 F1 car.)
That would be positive g's from deceleration. The body is still loading more weight than it's own (positive) because of Newton's law. You know a body in motion tends to stay in motion unless... bla, bla, bla. When you jump on the brakes or turn the car your body wants to stay at the same vector and speed. Change any of those variables and you'll feel your body come under load (or unload in the case of negative g's) as it's forced to change direction.
I apologize for the mistake, being from the US I wasnt familiar with the show. Thank you for the correction. Mark
Link is down Did anyone save it to disk? maybe someone can upload it again, please! www.yousendit.com works alright if you're not sure how to upload something. it'll only work for 30 days, I think, though.
Since we're talking about a car, I think it's safe to assume he wasn't speaking about vertical g-forces. A negative 'g' is a braking force, positive being acceleration. negative-longitudinal g's, or negative-inline g's or just negative g's as you originally said.
Well, the positive or the negative in front of the g's is not that important. The sign just denotes the direction of the force. The statement "a negative g is a braking force" is correct. In the sense that, by default, scientist define a positive force as one that accelerates (g); and a negative, one that decelerates -(g). On the other hand, "positive g's from deceleration" would be also correct. By stating the body is decelerating, a negative (-), the force acting on the body must be it's negative. Since we define -(g) as deceleration, the negative of this -(-(g)) is a positive. Longitudinal g's just means the the force is not on the direction of the motion but at a 90 degree angle from it. The sum of the square of the forces is the total g's; if I remember correctly. It is all just relative
longitudinal is in the direction of motion, lateral is perpendicular to it. I was just trying to make the point that senna was wrong to correct Crawford, who was, indeed, right. p.s the opposite of a negative anti deceleration g is a positive g. I think. I confused myself there. But, how's that for over complicated
The term "positive G's" is most often used to refer to the G force experienced in an aircraft when you pitch up. What happens is your body is resisting the motion of the aircraft and so the body gets pulled into the seat. Too many positive G's in an aircraft and you will "black out" - so much blood rushes downwards through the body and away from the head that you pass out. Negative G's are the exact opposite. i.e. Pitching downwards, resulting in a force that will lift you out of the seat. Excessively, you will experience "red out" - caused by blood rushing into the head - as a result pilots can experience a reddening of their vision before losing conciousness. It will also cause bursting of blood vessels in the head, excess pressure in the cranial cavity, aformentioned loss of conciousness and death. In a car, accelerating and braking causes longitudinal G-forces (forwards and backwards). Cornering causes lateral G-forces (sideways). Going up a steep hill (e.g. Eau Rouge at Spa-Francorchamps in Belgium) would result in positive G's. Going down a steep hill would result in negative G's.
A change in slope of the road surface is required to cause positive or negative g's. Not just travelling up or down the hill. You can be going up a hill and feel no postive G's, similarily going down a hill. As well, when talking about car, as we are, positive g's are generally longitudinal acceleration forces, and negative g's longitudinal braking forces. Really, I don't know why anyone assumed vertical g loads with Crawfords comment.
Did Tiff really race F1 cars? I didn't know that. I know he used to race Porsches and I think he drove in DTM races, but I didn't know he had F1 experience. I agree though, I really love to hear his enthusiasm when he finds a car he really likes!
He raced in 1978 I believe. He didn't have the funding so he wasn't able to continue. He has competed in 14 Le Mans, as well as many touring car races.
