Top Speed???
July-15th-2003, 12:08 PM
#16
2002 RX-7 Spirit 'R'
Join Date: Jul 2002
Location: Brampton, Ontario, Canada
Posts: 872
Originally posted by Phantom Cruiser
mine actually goes faster than this:
mine actually goes faster than this:
oh oh, but mine has a black dash gauges, and the mph and kmph are switched around
but yeah the rpm and everything is about the same spot
July-16th-2003, 02:53 PM
#21
Protegé Master
Join Date: Sep 2002
Location: Montreal, Canada
Posts: 194
Originally posted by toucci
since its drag limited that means any performance increase will boost the top speed... thats fun
since its drag limited that means any performance increase will boost the top speed... thats fun
July-16th-2003, 04:31 PM
#22
2002 RX-7 Spirit 'R'
Join Date: Jul 2002
Location: Brampton, Ontario, Canada
Posts: 872
Originally posted by Phantom Cruiser
you have a governor?
you have a governor?
maybe when mazda designed the car, they thought the little beast (FP-DE) would be too fast and put a governor in it for 190kmph, and think it wasn't needed for the 1.6L
but then they realized they didn't need a governor, so they took it out once they switched to the 2.0L... hehe
but FOR SURE i know mine has a governor, since i always hit it, and most other 1.8L's say they have one too i think
July-16th-2003, 05:11 PM
#23
Registered User
Join Date: Jun 2003
Location: San Diego, CA
Posts: 290
Originally posted by damaster
Not necessarly. In Physics, the definition of terminal velocity is: the maximum velocity that a moving object can attain, as determined by its total drag. This means that once your car reaches its terminal velocity, any more forward force you apply to it won't increase your car's velocity, no matter what you do.
Not necessarly. In Physics, the definition of terminal velocity is: the maximum velocity that a moving object can attain, as determined by its total drag. This means that once your car reaches its terminal velocity, any more forward force you apply to it won't increase your car's velocity, no matter what you do.
July-16th-2003, 06:43 PM
#24
Protege Enthusiast
Join Date: Oct 2001
Posts: 416
Originally posted by damaster
Not necessarly. In Physics, the definition of terminal velocity is: the maximum velocity that a moving object can attain, as determined by its total drag. This means that once your car reaches its terminal velocity, any more forward force you apply to it won't increase your car's velocity, no matter what you do.
Not necessarly. In Physics, the definition of terminal velocity is: the maximum velocity that a moving object can attain, as determined by its total drag. This means that once your car reaches its terminal velocity, any more forward force you apply to it won't increase your car's velocity, no matter what you do.
It explains why a mouse can survive a fall from any height (very low terminal velocity due to a very low weight to surface area/drag ratio), while humans can die falling from 10 feet (although that has more to do with how they land), long before they reach terminal velocity (which takes about 6-7 secs or 500-600+ feet).
The only way to determine a Protege's terminal velocity would be to drop it out of a plane (with a small drag chute to keep it pointing down). My guess would be somewhere north of 300mph (~480kph).
July-16th-2003, 07:08 PM
#25
Protegé Master
Join Date: Sep 2002
Location: Montreal, Canada
Posts: 194
I don't think you totally understand the concept of terminal velocity. It applies to objects in free fall as well as objects moving, such as a plane that is limited by its drag coefficient no matter how much force is applied to try to make it accelerate, all forces will always remain in equilibrium due to drag.
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
July-16th-2003, 07:32 PM
#26
Protege Enthusiast
Join Date: Oct 2001
Posts: 416
Originally posted by damaster
I don't think you totally understand the concept of terminal velocity. It applies to objects in free fall as well as objects moving, such as a plane that is limited by its drag coefficient no matter how much force is applied to try to make it accelerate, all forces will always remain in equilibrium due to drag.
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
I don't think you totally understand the concept of terminal velocity. It applies to objects in free fall as well as objects moving, such as a plane that is limited by its drag coefficient no matter how much force is applied to try to make it accelerate, all forces will always remain in equilibrium due to drag.
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
Drag increases with the cube of speed, and horsepower (or thrust) is usually the limiting factor in top speed. Design considerations and structural limits (both heat and drag/friction forces) are bigger limiters of top speed than power. Who would think you could make a semi, with a drag coefficient greater than a brick, go 300mph, but stick enough HP behind it (in th eform of three jet engines), and it's possible. Not sane, but possible.
From the dictionary definition of terminal velocity:
The constant velocity of a falling body, attained when the resistance of air, water, or other surrounding fluid has become equal to the force of gravity acting on the body.
or from http://scienceworld.wolfram.com/physics/Projectile.html
A projectile is a body which is propelled (or thrown) with some initial velocity, and then allowed to be acted upon by the forces of gravity and possible drag. The maximum upward distance h reached by the projectile is called the height, the horizontal distance traveled x the range (or sometimes distance), and the path of the object is called its trajectory. If a body is allowed to free-fall under gravity and is acted upon by the drag of air resistance, it reaches a maximum downward velocity known as the terminal velocity. The study of the motion of projectiles is called ballistics.
July-16th-2003, 10:43 PM
#27
2002 RX-7 Spirit 'R'
Join Date: Jul 2002
Location: Brampton, Ontario, Canada
Posts: 872
Originally posted by damaster
I don't think you totally understand the concept of terminal velocity. It applies to objects in free fall as well as objects moving, such as a plane that is limited by its drag coefficient no matter how much force is applied to try to make it accelerate, all forces will always remain in equilibrium due to drag.
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
I don't think you totally understand the concept of terminal velocity. It applies to objects in free fall as well as objects moving, such as a plane that is limited by its drag coefficient no matter how much force is applied to try to make it accelerate, all forces will always remain in equilibrium due to drag.
At least that's what I was taught by 4 different physics professors in Canada... maybe motion physics concepts are different in the US as is everything else from the rest of the world!
July-16th-2003, 10:48 PM
#29
Registered User
Join Date: Jun 2003
Posts: 241
I was able to get a porsche 911 (late model) to play with me, old guy, just wanted to dust me, which he did. I ended up about 115mph trying to catch up before I hit traffic. Doing a road trip to OK soon as I have training at Altus AFB, OK in Sep. I'll check it out then.
Btw, quick and easy head math technique for kph to mph: multiply by 6, drop the last digit.
Btw, quick and easy head math technique for kph to mph: multiply by 6, drop the last digit.
July-16th-2003, 10:59 PM
#30
I Bent My Wookie
Join Date: Feb 2003
Location: Knoxville, TN
Posts: 358
Originally posted by Davard
Do you really think that a Protege is anywhere near its terminal velocity at 120mph????
Drag increases with the cube of speed, and horsepower (or thrust) is usually the limiting factor in top speed. Design considerations and structural limits (both heat and drag/friction forces) are bigger limiters of top speed than power. Who would think you could make a semi, with a drag coefficient greater than a brick, go 300mph, but stick enough HP behind it (in th eform of three jet engines), and it's possible. Not sane, but possible.
From the dictionary definition of terminal velocity:
The constant velocity of a falling body, attained when the resistance of air, water, or other surrounding fluid has become equal to the force of gravity acting on the body.
or from http://scienceworld.wolfram.com/physics/Projectile.html
A projectile is a body which is propelled (or thrown) with some initial velocity, and then allowed to be acted upon by the forces of gravity and possible drag. The maximum upward distance h reached by the projectile is called the height, the horizontal distance traveled x the range (or sometimes distance), and the path of the object is called its trajectory. If a body is allowed to free-fall under gravity and is acted upon by the drag of air resistance, it reaches a maximum downward velocity known as the terminal velocity. The study of the motion of projectiles is called ballistics.
Do you really think that a Protege is anywhere near its terminal velocity at 120mph????
Drag increases with the cube of speed, and horsepower (or thrust) is usually the limiting factor in top speed. Design considerations and structural limits (both heat and drag/friction forces) are bigger limiters of top speed than power. Who would think you could make a semi, with a drag coefficient greater than a brick, go 300mph, but stick enough HP behind it (in th eform of three jet engines), and it's possible. Not sane, but possible.
From the dictionary definition of terminal velocity:
The constant velocity of a falling body, attained when the resistance of air, water, or other surrounding fluid has become equal to the force of gravity acting on the body.
or from http://scienceworld.wolfram.com/physics/Projectile.html
A projectile is a body which is propelled (or thrown) with some initial velocity, and then allowed to be acted upon by the forces of gravity and possible drag. The maximum upward distance h reached by the projectile is called the height, the horizontal distance traveled x the range (or sometimes distance), and the path of the object is called its trajectory. If a body is allowed to free-fall under gravity and is acted upon by the drag of air resistance, it reaches a maximum downward velocity known as the terminal velocity. The study of the motion of projectiles is called ballistics.
Getting technical on their asses. On a side not I have gotten up to 122, could have gone faster, but a Cadillac going 40 pulled in front of me. Don't know how my car is still in one piece without a bit of harm.
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Last edited by Proto2k; August-26th-2011 at 08:14 PM.