Which Z4 is the fastest?

[Argyll Andy]

[ref]Flyingfifer[/ref],

Wullie, I’m quite happy with a poll and even for my slow one to be included :wink:

I suppose it’s all down to the opportunities you get to trial it but on my accessible limited private road :wink: mine has “only” reached 146 mph which is slow and pales into insignificance with some of the other speeds being quoted

 

[Flyingfifer]

[ref]Flyingfifer[/ref],

Wullie, I’m quite happy with a poll and even for my slow one to be included :wink:

I suppose it’s all down to the opportunities you get to trial it but on my accessible limited private road :wink: mine has “only” reached 146 mph which is slow and pales into insignificance with some of the other speeds being quoted

Tbf mine has only managed about the same on my bit of private road, didnt quite make the 155 limit (though I do wonder if the speedo was overreading the speed)

 

[The.Analyst]

Yeah, pretty true.
Just after I had my speed limiter taken off,I took it to East Fortune Airfield,and got to use a bit of old runway now used for trsckdays...
Got the car upto 176.2 mph,with a couple hundred rpm to go before the rev limiter
Ran out of Runway,for available braking distance,as was still on Standard brakes then,back in 2012.
Car felt ok,but definitely at its limits with a soft top z4m.imo.

Wow, how long was the straight? :?
Rob

A full length Airstrip ,Rob.
Part of it(less than half), has been used by a guy I know(friend if a friend from my Motorsport/track days), for several years now has used it for Track day events,or at least prior to Covid he was.

If you look at East Fortune on Google you will see at best you have less than a mile of old runway before you cross a public road.

A back of a cigarette packet calculation shows that to get to 155mph will take a Z4M around a mile.

So given the massive effort in time and distance 155mph to 176 mph would take forever..I doubt that except downhill with a tailwind it’s even possible in a stock Z4M.

That assumes you cross the public road still going 155 mph.

Grip on reality?

If you are going to tell porky pies make sure someone can’t check up on it.

 

[Smartbear]

As the OP I can reveal the answer (almost). This subject was a draw between red and blue and has gone to penalties. Just waiting for the penalties gained by red and blue car owners and we should have a result.

OP, I'm sorry to say that you've set the hare running and no-one is listening to you anymore :roll:

Reminds me of a RAF bloke I knew who claimed he owned a Trabant that went over 350mph.
He brought it back to the UK in the back of a Herc, so technically he was correct. :wink:

That’s not so impressive when you consider his shoes were capable of the same speed
Rob

 

[enuff_zed]

As the OP I can reveal the answer (almost). This subject was a draw between red and blue and has gone to penalties. Just waiting for the penalties gained by red and blue car owners and we should have a result.

OP, I'm sorry to say that you've set the hare running and no-one is listening to you anymore :roll:

Reminds me of a RAF bloke I knew who claimed he owned a Trabant that went over 350mph.
He brought it back to the UK in the back of a Herc, so technically he was correct. :wink:

That’s not so impressive when you consider his shoes were capable of the same speed
Rob

:rofl:

 

[Smartbear]

[ref]Flyingfifer[/ref],

Wullie, I’m quite happy with a poll and even for my slow one to be included :wink:

I suppose it’s all down to the opportunities you get to trial it but on my accessible limited private road :wink: mine has “only” reached 146 mph which is slow and pales into insignificance with some of the other speeds being quoted

I managed an indicated 145mph in 5th driving my old 3.0si on a foreign motorway, in Leicester
Rob

 

[enuff_zed]

From RAF Marham to the nearest 30mph limit is about 3 miles. Way back in the mists of the 80s I was pulled in my Mk1 Capri for entering this 30 limit at 38mph.
Mr Policeman said "Sir, do you realise you were doing 38 in a 30 limit?"
Apparently I would have got away with a slapped wrist. Right up to the point when I replied "Do YOU realise it's taken me all the way from Marham to get up to that and now I have to start again?"
Sixty quid was a lot of money back then!!!

 

[Smartbear]

From RAF Marham to the nearest 30mph limit is about 3 miles. Way back in the mists of the 80s I was pulled in my Mk1 Capri for entering this 30 limit at 38mph.
Mr Policeman said "Sir, do you realise you were doing 38 in a 30 limit?"
Apparently I would have got away with a slapped wrist. Right up to the point when I replied "Do YOU realise it's taken me all the way from Marham to get up to that and now I have to start again?"
Sixty quid was a lot of money back then!!!

He probably heard the valves bouncing as you approached take off speed, dead giveaway
Rob

 

[buzyg]

From RAF Marham to the nearest 30mph limit is about 3 miles. Way back in the mists of the 80s I was pulled in my Mk1 Capri for entering this 30 limit at 38mph.
Mr Policeman said "Sir, do you realise you were doing 38 in a 30 limit?"
Apparently I would have got away with a slapped wrist. Right up to the point when I replied "Do YOU realise it's taken me all the way from Marham to get up to that and now I have to start again?"
Sixty quid was a lot of money back then!!!

:lol: :rofl:

 

[craig3.2]

Wow, how long was the straight? :?
Rob

A full length Airstrip ,Rob.
Part of it(less than half), has been used by a guy I know(friend if a friend from my Motorsport/track days), for several years now has used it for Track day events,or at least prior to Covid he was.

If you look at East Fortune on Google you will see at best you have less than a mile of old runway before you cross a public road.

A back of a cigarette packet calculation shows that to get to 155mph will take a Z4M around a mile.

So given the massive effort in time and distance 155mph to 176 mph would take forever..I doubt that except downhill with a tailwind it’s even possible in a stock Z4M.

That assumes you cross the public road still going 155 mph.

Grip on reality?

If you are going to tell porky pies make sure someone can’t check up on it.

Get your facts right,Peter/analyst....
The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.

You also weren't there when I pulled 197mph on a track in a then brand new, Murcielago, but just because you weren't there, doesn't mean it isn't true,Mr Bondar....sorry Mr Analyst,lol

 

[earthdweller]

A full length Airstrip ,Rob.
Part of it(less than half), has been used by a guy I know(friend if a friend from my Motorsport/track days), for several years now has used it for Track day events,or at least prior to Covid he was.

If you look at East Fortune on Google you will see at best you have less than a mile of old runway before you cross a public road.

A back of a cigarette packet calculation shows that to get to 155mph will take a Z4M around a mile.

So given the massive effort in time and distance 155mph to 176 mph would take forever..I doubt that except downhill with a tailwind it’s even possible in a stock Z4M.

That assumes you cross the public road still going 155 mph.

Grip on reality?

If you are going to tell porky pies make sure someone can’t check up on it.

Get your facts right,Peter/analyst....
The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.

You also weren't there when I pulled 197mph on a track in a then brand new, Murcielago, but just because you weren't there, doesn't mean it isn't true,Mr Bondar....sorry Mr Analyst,lol

Interesting to note

Road and track tested a Murcialago and it took 40 seconds and 8544 feet to reach 200 mph

That is 1.63 miles … and then you have to decelerate


Thinking time 1 seconds ( being generous, aligned to your skill )

Thinking Distance: 194 feet

This is the distance the car travels in the time the driver decides to brake and actually apply the brakes and is directly proportional to speed.

Braking Distance: 1938 feet

This is the distance the car travels while the brakes are applied and is proportional to speed squared.

Total Stopping Distance: 2132 feet

Therefore to hit 197 mph ( your speed it would take 1.63 miles and then it would take you almost half a mile to stop

You would therefore need comfortably in excess of 2 miles of straight tarmac to achieve

So if you used a 1.5 mile long runway you’d be over half a mile off the end of it before you stopped

(assuming maximum acceleration and deceleration in a straight line on a good dry surface)

If you hit grass at the end of the runway ., well :thumbsdown:

 

[craig3.2]

If you look at East Fortune on Google you will see at best you have less than a mile of old runway before you cross a public road.

A back of a cigarette packet calculation shows that to get to 155mph will take a Z4M around a mile.

So given the massive effort in time and distance 155mph to 176 mph would take forever..I doubt that except downhill with a tailwind it’s even possible in a stock Z4M.

That assumes you cross the public road still going 155 mph.

Grip on reality?

If you are going to tell porky pies make sure someone can’t check up on it.

Get your facts right,Peter/analyst....
The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.

You also weren't there when I pulled 197mph on a track in a then brand new, Murcielago, but just because you weren't there, doesn't mean it isn't true,Mr Bondar....sorry Mr Analyst,lol

Interesting to note

Road and track tested a Murcialago and it took 40 seconds and 8544 feet to reach 200 mph

That is 1.63 miles … and then you have to decelerate


Thinking time 1 seconds ( being generous, aligned to your skill )

Thinking Distance: 194 feet

This is the distance the car travels in the time the driver decides to brake and actually apply the brakes and is directly proportional to speed.

Braking Distance: 1938 feet

This is the distance the car travels while the brakes are applied and is proportional to speed squared.

Total Stopping Distance: 2132 feet

Therefore to hit 197 mph ( your speed it would take 1.63 miles and then it would take you almost half a mile to stop

You would therefore need comfortably in excess of 2 miles of straight tarmac to achieve

So if you used a 1.5 mile long runway you’d be over half a mile off the end of it before you stopped

(assuming maximum acceleration and deceleration in a straight line on a good dry surface)

If you hit grass at the end of the runway ., well :th

Andy,if you're going to have a go at me,yet again :roll:
Please read carefully what I actually said
I was talking about my z4m on a disused airstrip,that the particular section I used,doesn't exist in its entirety, anymore,as it's now shorter,and has went from circa 1.5 mile's to only around 0.8 of a mile, nowadays.

I said I had also done upto197mph in a then , brand new Murcielago.
I did not say it was at the same place,it wasn't (I did say as much,it was on a Race track), and I drove several cars that day.
It wasn't even the same year as I was talking about my z,just said that I had also done 197 in a Murcielago.
Not once did I say at the same place,time or even year,as it was way before that.
Drove several high end sports cars that day(day of the Murcielago,not my zed,for clarity,lol),and did max speeds of between 168/173/178 & 197, in various cars.
It was very enjoyable,and unfortunately many years ago now.

P.s,Also,it was flying Laps on a TRACK, (not the Old airfield), and when you do flying Laps,as many on here will know,you don't hit your Max speed , then come to a Complete Stop,you just need to slow down to around half that speed,or whatever,for the approaching bend,as was the case.
I was trying to hit the magical 200mph mark,as the car was Said ,in the spec it was in(lp640,with lots of optional bits specced on it), capable of around 212mph, so was gutted when I couldn't get it to 200,as I ran out of(correct section of) track.
The pro circuit driver then told me,only a few of the professional racing drivers on that track,can actually hit 200ish in it!
Anyhoo, Thanks again for going off half cocked just to have a pop at me

 

[B21]

“The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights “





Strangely tonight when I used the Ordnance Survey just now it shows that East Fortune airport was only ever 1.2 miles long? Not 1.5 miles?

That includes the 450m of Cold War extension on the other side of a B road…so assuming you could have used the whole of the available length without flying across the B road, it would have been 1.2 miles - 450m = 0.9 miles which I think is quite a bit less than 1.5 miles?

Maybe a “mike’s” a different unit of measure?

The East Fortune flying web site states their longest runway is 450 metres not 2/3rd of a mile which I think is around 1070 meters?

Seems that your arithmetic is out by about 1/3 to 1/2?

 

[AndyBeech]

Get your facts right,Peter/analyst....
The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.

You also weren't there when I pulled 197mph on a track in a then brand new, Murcielago, but just because you weren't there, doesn't mean it isn't true,Mr Bondar....sorry Mr Analyst,lol

Interesting to note

Road and track tested a Murcialago and it took 40 seconds and 8544 feet to reach 200 mph

That is 1.63 miles … and then you have to decelerate


Thinking time 1 seconds ( being generous, aligned to your skill )

Thinking Distance: 194 feet

This is the distance the car travels in the time the driver decides to brake and actually apply the brakes and is directly proportional to speed.

Braking Distance: 1938 feet

This is the distance the car travels while the brakes are applied and is proportional to speed squared.

Total Stopping Distance: 2132 feet

Therefore to hit 197 mph ( your speed it would take 1.63 miles and then it would take you almost half a mile to stop

You would therefore need comfortably in excess of 2 miles of straight tarmac to achieve

So if you used a 1.5 mile long runway you’d be over half a mile off the end of it before you stopped

(assuming maximum acceleration and deceleration in a straight line on a good dry surface)

If you hit grass at the end of the runway ., well :th

I was trying to hit the magical 200mph mark,as the car was Said ,in the spec it was in(lp640,with lots of optional bits specced on it), capable of around 212mph, so was gutted when I couldn't get it to 200,as I ran out of(correct section of) track.
The pro circuit driver then told me,only a few of the professional racing drivers on that track,can actually hit 200ish in it!
Anyhoo, Thanks again for going off half cocked just to have a pop at me

What was the track out of interest?

 

[earthdweller]

Lots of old threads about this, should you care to search. To sum up, from a standard E85/86 ///M perspective. The cars are geared to go to about 172 mph in 5th before they hit the limiter on the rev counter and by a number of accounts they can indeed pull and hit that limiter.

Personally I have reached 167mph in mine about 10 years ago. At which point I ran out of bottle, as the front felt light. It was still pulling at that point, so I am happy that the old girl would reach that speed at least once, before exploding. No plans to ever try again. Neither of us are getting any younger. :driving:

As to newer models, I have little knowledge of what they are capable of. As to modified cars. The sky is only limited by budget and physics. :wink:

Yeah, pretty true.
Just after I had my speed limiter taken off,I took it to East Fortune Airfield,and got to use a bit of old runway now used for trsckdays...
Got the car upto 176.2 mph,with a couple hundred rpm to go before the rev limiter
Ran out of Runway,for available braking distance,as was still on Standard brakes then,back in 2012.
Car felt ok,but definitely at its limits with a soft top z4m.imo.

Wow, how long was the straight? :?
Rob

That’s what got me .. and why I used the lambo quoted as it was easier without digging figures

You see a Z4M will hit the quarter mile @ 113mph in 13.8secs according to road tests ( from accelerationtimes.com )

It will then take around 2secs to add each additional 10mph which gets longer as the speed increases .. but let’s leave it at 2sec for each 10mph increment to work out distance travelled at 120mph in 2 secs you would cover 54m/s .108m at 130 116m etc as the distance travelled increases so at 160 you’d cover 144m in 2 secs

So very roughly to get from 114mph @ 1/4mile to 176mph you would need some 800m/2624ft added to 1320ft for the 1/4mile which is 3844ft/0.73mile which is generous as time/distance between each increment will increase and my calcs assume 10mph increments in 2 secs

So, by my rough calcs we are looking at the very least 8/10mile to hit v/max ( likely in reality more ) and then you need to decelerate which add another 4/10 mile perhaps

I’d imagine you’d need at least a 1.5 mile runway to achieve a v/max of 176mph in a Z4m and probably more with any safety net

Which is why a questioned it, not because of having a pop at Craig I’m just trying to understand how it’s possible and what space you’d need to do it and having seen multiple reports of people’s top speeds in Z4M’s I’ve never seen anyone reporting over 176mph .. plenty in the high 160’s though

 

[Ed.Straker]

VLP (Very Long Post)

Following on from Craig3.2's seminal quote on the awesome acceleration and top speed of his undocumented blast at East Fortune embodied in his text here

'The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.'

I thought I'd try and calculate the physics of it.

So whilst we are waiting here for our latest omicron 'guests' I'd thought I'd ask one of our maths grads to assist me in the calculations..

I found a very useful web site https://www.automobile-catalog.com/ which has a treasure trove of data has some useful tools to allow comparisons and simulations.

I asked for the 35is and the Z4M roadster.

The graphs and tables allow you to deduce various performance data.

So the Z4M is faster in the simulations than the 35is..in all cases, but not by much, that extra weight and a few horses less just edges the 35is out.

Craig3.2 stated a 1/4 mile of 108.2..the sim says 109 so its close and being generous.

How to work out the time / distance to 176mph without a road test.

Well the sim won't give us that answer.

It does say its going to take 53.5 seconds to get to 160 mph and 82 seconds to get to 167 mph

It does say that the theoretical top speed is 172mph if gearing and power could make it happen.

The time to distance graphs show that a Z4M should get to 150 mph in around 33 seconds.

That means its going to take around 20 seconds to go from 150mph to 160 mph and another 26 seconds to get from 160mph to 167 mph.

The graphs show that by the time we get to 24 seconds we have traveled 1050 meters

At 24 seconds looking back at the tables we are doing 140 mph.

Thanks to the maths grad who couldn't be bothered but pointed out a conservative cheat..

Bearing in mind 100 mph is 45 meters per second

At 24 seconds we are 1050 metres down the runway and at 140 mph
33 seconds, 150 mph ( its taken 9 seconds at an average of 145 mph) so that's an additional 587 meters
53.5 seconds, 160 mph (its taken 20 seconds at an average of 155 mph) so that's an additional 1395 meters
82 seconds, 167 mph (its taken 28 seconds at an average of 163 mph) so that's an additional 2053 meters

So it looks like to get to 167 mph from a standing start takes 1050+587+1395+2053 = 5085 meters

As for stopping this calculator https://www.random-science-tools.com/physics/stopping-distance.htm suggests from 176 mph you would need 550 meters to stop.

So that suggests 0-167 mph to zero would take over 5,500 meters.. using Craig's custom built 1.5 mile track he looks like he's going to be in the grass for 3,900 meters, wonder what its like at 176 mph?

Allowing for errors and approximations that would suggest Craig3.2s car is considerably more powerful than 340 bhp....

I found this bed time reading stimulating..

https://x-engineer.org/vehicle-acceleration-maximum-speed-modeling-simulation/

 

[Scubaregs]

[ref]Ed.Straker[/ref], So, what are you trying to say? :rofl:

 

[earthdweller]

VLP (Very Long Post)

Following on from Craig3.2's seminal quote on the awesome acceleration and top speed of his undocumented blast at East Fortune embodied in his text here

'The Old Runway that used to be in use was 1.5 mike's long ,the ones currently in use are only around 2/3 of a mile,two are still in use for public flights
Some sections are,or were,back in the 2000/2012 timeframe,also used for Track day events,and are used for Bike racing too, or were at one point.
The section I used was circa 1.5 miles,with a run off to grass thereafter!
I stopped just prior to going on the Grass section of that bit.
The main runway has now been changed again,and as said,is circa 0.8 miles.
That was after I had used the fuller,longer section.

I don't need to tell lies.
The car was delimited,and I had an opportunity to take it on an old Airstrip,end of.
The car has also ran 108.2 on a 1/4 Mile,with nothing more than that de limit,and not much else at that time,where other sites quote the stock car as 107.6 on the 1/4 Mile.
So,yeah,it takes another 3)4 Mike from there to get from 108,to 176.
Then the rest of the strip to slow down again!

I had an after market satnav with GPS and it was reading my speed digitally.
Not bothered if you believe me or not, quite frankly.
But don't call me a liar when you weren't there.'

I thought I'd try and calculate the physics of it.

So whilst we are waiting here for our latest omicron 'guests' I'd thought I'd ask one of our maths grads to assist me in the calculations..

I found a very useful web site https://www.automobile-catalog.com/ which has a treasure trove of data has some useful tools to allow comparisons and simulations.

I asked for the 35is and the Z4M roadster.

The graphs and tables allow you to deduce various performance data.

So the Z4M is faster in the simulations than the 35is..in all cases, but not by much, that extra weight and a few horses less just edges the 35is out.

Craig3.2 stated a 1/4 mile of 108.2..the sim says 109 so its close and being generous.

How to work out the time / distance to 176mph without a road test.

Well the sim won't give us that answer.

It does say its going to take 53.5 seconds to get to 160 mph and 82 seconds to get to 167 mph

It does say that the theoretical top speed is 172mph if gearing and power could make it happen.

The time to distance graphs show that a Z4M should get to 150 mph in around 33 seconds.

That means its going to take around 20 seconds to go from 150mph to 160 mph and another 26 seconds to get from 160mph to 167 mph.

The graphs show that by the time we get to 24 seconds we have traveled 1050 meters

At 24 seconds looking back at the tables we are doing 140 mph.

Thanks to the maths grad who couldn't be bothered but pointed out a conservative cheat..

Bearing in mind 100 mph is 45 meters per second

At 24 seconds we are 1050 metres down the runway and at 140 mph
33 seconds, 150 mph ( its taken 9 seconds at an average of 145 mph) so that's an additional 587 meters
53.5 seconds, 160 mph (its taken 20 seconds at an average of 155 mph) so that's an additional 1395 meters
82 seconds, 167 mph (its taken 28 seconds at an average of 163 mph) so that's an additional 2053 meters

So it looks like to get to 167 mph from a standing start takes 1050+587+1395+2053 = 5085 meters

As for stopping this calculator https://www.random-science-tools.com/physics/stopping-distance.htm suggests from 176 mph you would need 550 meters to stop.

So that suggests 0-167 mph to zero would take over 5,500 meters.. using Craig's custom built 1.5 mile track he looks like he's going to be in the grass for 3,900 meters, wonder what its like at 176 mph?

Allowing for errors and approximations that would suggest Craig3.2s car is considerably more powerful than 340 bhp....

I found this bed time reading stimulating..

https://x-engineer.org/vehicle-acceleration-maximum-speed-modeling-simulation/

Well that’s better than my back of the fag packet o level maths

:rofl:


I did err on the generous side without stating it would progressively take longer and longer with each incremental 10mph

Interestingly if he did achieve 176 mph he would cover the entire runway in around 20 secs from on end to another

These kind of high speed runs are normally done over several miles for the exact reasons you point out

Anyway bravo for the “maths genius”

 

[earthdweller]

[ref]Ed.Straker[/ref], So, what are you trying to say? :rofl:

 

[Scubaregs]

Is it possible the mods helped, like this?