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Discussion Starter · #1 ·
I live at sea level and there is a 2 miles relatively straight road so when I went to the store last night there and back i set in on cruise control to the speed limit. mine is lifted and bigger tires so 2in higher than stock.

all with cruise control on.

55mph straight, no turns

Speedometer Vehicle Trip computer Tachometer Odometer


45mph no turns with slow down for turn in.
Speedometer Trip computer Odometer Tachometer Gauge



Speedometer Odometer Car Tachometer Gauge


50mph 3 long curves with pull in.

Speedometer Trip computer Odometer Tachometer Car

Speedometer Trip computer Odometer Tachometer Car
 

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Better to keep records of fillups and miles between to work out the bias on the MPG meter.

On my car it's close to 1.3 MPG optimistic. This is pretty consistent over 59 full tanks of gas to date (2019.04 to present).
 

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I live in the Mile High City (Denver). Here at my house I live at around 5,400' in elevation (1.65km for you @Hadleys Taxi). This weekend I took the HRV up to a hike that started at 9,700' (2.95km), and back down. Going up, a respectable 26.3mpg. Coming back down, 58.6mpg. This is over a 25 mile drive.
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Brilliant Sporty Blue Honda HR-V 1.5 iVTEC SE 6 Speed Manual
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@Dammit I must confess, kilometres confuses the crap out of me. We use mm, cm, m, and once we get past a few 100m we revert to miles.

Same goes with drinks, we buy our milk and soft drinks in ml & litres, but buy our beer in pints and spirits in half or quarter gills - Imperial Gill = 142 millilitres.

It's a Brit Thing!
 

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@Dammit I must confess, kilometres confuses the crap out of me. We use mm, cm, m, and once we get past a few 100m we revert to miles.

Same goes with drinks, we buy our milk and soft drinks in ml & litres, but buy our beer in pints and spirits in half or quarter gills - Imperial Gill = 142 millilitres.

It's a Brit Thing!
While I'm all for traditional beer units in the UK, it mystifies me that you still use miles but sell gasoline by the litre. I was picked up by a chauffeur at Heathrow to go to Yeovil one morning, and I noticed the sign giving the speed limit. He was driving at 100 mph, however and said "I know where all the speed cameras are". Only time I saw Stonehenge and that lasted a blink!

IAC on that program (Westland Helicopters at the time) everything was metric except parts of the nav system (knots, nautical miles; also used UTM and MGRS which are metric).

What irks me is this European unit of L/100km. Ack-basswards. It comes from the era when cars were far less efficient. Should have been km/L.

Of course Canada is stupid - so car mileage is expressed as L/100 km. It's not a hard conversion to do but it's a PITA.

Some useful constants:
1 foot = 0.3048 metres (exactly).
1 inch = 25.4 mm (exactly).
1 mile = 1.6 km (not exactly; 1.609 is close but still not "exact").
1 pound = 454 grams (not exactly) - 1 Kg = 2.2 Lbs (not exactly)
 

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The reason we display or fuel in litres is due to EU regulations. It's the same reason why the 0-60mph times changed to 0-62mph as 62mph equates to 100kph.

It's also why our Speedo's display kph as well as mph. Yet mainland Europe registered vehicles don't have to display mph, for those that travel to the UK.

You missed out Cables and Shackles in your Nautical Measurements.

Lynx, Wildcat or Merlin, or all three?
 

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The reason we display or fuel in litres is due to EU regulations. It's the same reason why the 0-60mph times changed to 0-62mph as 62mph equates to 100kph.

It's also why our Speedo's display kph as well as mph. Yet mainland Europe registered vehicles don't have to display mph, for those that travel to the UK.

You missed out Cables and Shackles in your Nautical Measurements.

Lynx, Wildcat or Merlin, or all three?
I find the "62 mph" thing ridiculous. Why does it have to be a round number of km/hr converted to MPH (rhetorical - Eurocrats are a breed ...)

Speedos here (Canada) have been km/hr since the late 70's with MPH on an inner ring for driving in the US.
Conversely, US cars are MPH and some (many) had km/hr on the inner ring.

On my Accord, there is only km/hr, but I can cause a MPH indicator to appear in the middle of the console if needed via display options.

We don't have furlongs per fortnight in our nav systems either (though it's pretty trivial to do). I don't know what the ASW platforms use for depth. Feet, metres, fathoms ... depends on the nation. When we did nav for various Italian B-212's, the system had a program-plug (wiring harness) that would tell the nav system what displays, interfaces, units, etc. to use. Indeed, different services used different nautical miles. The standard has been 1852m for a long time, but some services had their charts with different values for a NM (Brits: 6080 feet for example up until 1939 IIRC).

EH-101 for Canada (Cormorant - not Merlin) and Italy (not sure what they call it).
 

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Our Embarked Flight were using Lynx when I was still Serving, however, we have since introduced Wildcat, and they alternate between that and Merlin depending on tasking. I would not have been able to have taken a phot like this if we had Merlin embarked as the down draft is so powerful the FDO (Flight Deck Officer in white ovies) now have to operate within the hangar with the hanger door closed, or have the FDO secured to the deck to prevent them being blown over board.
Clothing Water Sky Vehicle Tire

The rotors are burning and turning in the phot!

Water Watercraft Boat Vehicle Naval architecture


The above Ship, HMS Norfolk, was the last RN Ship to have a wooden deck. She was subsequently sold to Chile in 2005, and is now the Almirante Cochrane.
 

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2018 HR-V EX AWD CVT
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I live in the Mile High City (Denver). Here at my house I live at around 5,400' in elevation (1.65km for you @Hadleys Taxi). This weekend I took the HRV up to a hike that started at 9,700' (2.95km), and back down. Going up, a respectable 26.3mpg. Coming back down, 58.6mpg. This is over a 25 mile drive. View attachment 34254
Getting back to fuel economy: This is surprising. That's an average of about 36.5 MPG, assuming you took the same route both ways. That's about what I'd expect to get on the level. Of course speed would play a big part of the equation. You must have been light on the throttle.
 

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Getting back to fuel economy: This is surprising. That's an average of about 36.5 MPG, assuming you took the same route both ways. That's about what I'd expect to get on the level. Of course speed would play a big part of the equation. You must have been light on the throttle.
You can't average an "uphill" and "downhill" amount to find the "flat" average. For a variety of reasons. If the amounts averaged to the same, it's a coincidence.
 

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Discussion Starter · #16 · (Edited)
:ROFLMAO:

you again.

all accurate recording of a vehicle is done with a two way average, which includes going back to the point where you started.

if you went downhill one way and got 1000mpg coasting in neutral, you cant claim your car gets 1000mpg.

it doesnt matter if its to cancel elevation, lateral trasit or wind variance - all standard testing is there and back.

From mpg to top speed.
 
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