Cold air makes a difference

[wizard]

Took the car to work today and noticed how dramatically better it performed now the air temperature has dropped.

If only it was like that all the time.....

 

[Rotorhead]

Piston engined aircraft always fly better on a cold day.

In fact, on hot summer's days you need far more runway for a safe take off.

 

[carlmthompson]

Also makes a difference when you fill up - the colder it is the more dense the petrol is, so the more you get for your dosh!

Aircraft - I would have thought the take off thing would be more to do with the denser air through the propellor rather than more power (although I'm sure that'll make a bit of a difference also!)

 

[wizard]

So what are we saying here? Do I need a bigger rear spoiler [][][]

 

[Hilux]

the colder it is the more dense the petrol is

I dont think I`m wrong but I see it as the cooler it is, the more dense the air becomes therefore more fuel attaches itself to a greater number of air molecules in a smaller area so if the same volume of air is used the better the performance?

.........................hence the charge cooled air enters the engine via an intercooler.