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-   -   How fast would I have been going? (https://www.the75andztclub.co.uk/forum/showthread.php?t=296031)

macafee2 25th May 2019 08:36

How fast would I have been going?
 
I know the digital displays are not 100% accurate so I think this is more "fun" than factual.

Yesterday the range display, how many miles I could go with the fuel I had, was counting down a mile every 15 seconds. This seemed awfully quick.
How fast would I have had to have been going? MPG was showing 43mpg.

Lets assume I was doing 43mpg and the range was going down by a mile every 15 seconds.

My mind is blank on how to work it out

macafee2

Dorset Bob 25th May 2019 09:02

60 mph is a mile a minute.
Therefore a mile covered in 15 seconds equates to a speed of 240 mph.

Sent from my SM-T813 using Tapatalk

macafee2 25th May 2019 09:29

Quote:

Originally Posted by Dorset Bob (Post 2735894)
60 mph is a mile a minute.
Therefore a mile covered in 15 seconds equates to a speed of 240 mph.

Sent from my SM-T813 using Tapatalk

thank you. i'v asked a question, gotten and answer and now I'm going to query the answer... perhaps not the smartest thing.
You have put a mile covered in 15 seconds but it was not my mileage trip going up a mile every 15 seconds but my fuel range was going down every 15 seconds. Is it still 240mph?

macafee2

COLVERT 25th May 2019 10:03

No, not 240 mph.

The fuel range depends on how much throttle you are giving your car.

Lots of throttle= low range per tank full.

Light throttle= large range per tank full.

Or per gallon if you prefer.----:D

slovcan 25th May 2019 12:18

Must have been going full throttle uphill on a cold engine in a massive headwind on under-inflated tires.

macafee2 25th May 2019 12:47

Quote:

Originally Posted by COLVERT (Post 2735902)
No, not 240 mph.

The fuel range depends on how much throttle you are giving your car.

Lots of throttle= low range per tank full.

Light throttle= large range per tank full.

Or per gallon if you prefer.----:D

fair point, I agree
dash cam said 70 mph, cruise control set, engine hot, flat or incline but not a hill of any significance.

so lets go on the flat, hot engine, enough throttle to do 70, wind?????

macafee2

chicochapman 26th May 2019 21:54

Range also varies in direct proportion to gallons remaining in the tank and fuel consumption.
Furthermore, gallons remaining is a function of speed, elapsed time and MPG so unless you're a whiz at differential calculus, you're stuffed.


Does that help? - probably not!

macafee2 27th May 2019 08:45

Quote:

Originally Posted by chicochapman (Post 2736278)
Range also varies in direct proportion to gallons remaining in the tank and fuel consumption.
Furthermore, gallons remaining is a function of speed, elapsed time and MPG so unless you're a whiz at differential calculus, you're stuffed.


Does that help? - probably not!

your right, it doen't help :)

macafee2


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