I've always wondered how accurate my speedo was so I tried to work it out.
An article in one of the Landy mags a while ago inspired me.
I travelled along a dual carriageway at a set speed and timed how long it took me to travel a set distance.
Dual carraigeways are good because they have the little distance markers every 100 meters. The green, white and red posts with numbers at the top.
I travelled 9 Km in 5 minutes, 21.32 secs.
With a little school boy maths 'A car takes 5 mins 21.32 secs to travel 9 Km, how fast was it going in MPH?' and using the conversion factor below I worked out that I was going 62.66MPH
My speedo showed 70MPH the whole time. This is over a 10% difference.
I expected the actual speed to be less - but not that low.
However my Landy is a 1986 vintage so that may account for it.
My other car, a 1997 Rover took 5 mins 11.23 secs to do the same distance.
Can anyone work out the actual speed of this car?
Try it on your car, you may be surprised...
Usual disclaimer though. Be careful, it's best to have someone using the stop watch and counting the markers and then someone else driving :shock:
Coversion rates
1 KM = 0.621371192 miles
1 mile = 1.609344 KM
Cheers
Mark
An article in one of the Landy mags a while ago inspired me.
I travelled along a dual carriageway at a set speed and timed how long it took me to travel a set distance.
Dual carraigeways are good because they have the little distance markers every 100 meters. The green, white and red posts with numbers at the top.
I travelled 9 Km in 5 minutes, 21.32 secs.
With a little school boy maths 'A car takes 5 mins 21.32 secs to travel 9 Km, how fast was it going in MPH?' and using the conversion factor below I worked out that I was going 62.66MPH
My speedo showed 70MPH the whole time. This is over a 10% difference.
I expected the actual speed to be less - but not that low.
However my Landy is a 1986 vintage so that may account for it.
My other car, a 1997 Rover took 5 mins 11.23 secs to do the same distance.
Can anyone work out the actual speed of this car?
Try it on your car, you may be surprised...
Usual disclaimer though. Be careful, it's best to have someone using the stop watch and counting the markers and then someone else driving :shock:
Coversion rates
1 KM = 0.621371192 miles
1 mile = 1.609344 KM
Cheers
Mark