Other aerodynamics

I could weigh in on this considering my qualifications as an Aircraft Design Engineer (Anyone recognise half Rho, V squared, S by chance) so don't forget air denisty (Rho) chaps....

Double the velocity quadruples the force acting upon the body......the principles of Fluid Dynamics - as V is squared!

well that’s my brain totally fried after reading that , oh hang on that happens when i read a book with pictures

Saint.V8 said:

I could weigh in on this considering my qualifications as an Aircraft Design Engineer (Anyone recognise half Rho, V squared, S by chance) so don't forget air denisty (Rho) chaps....

Double the velocity quadruples the force acting upon the body......the principles of Fluid Dynamics - as V is squared!

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Think that is what i was trying to say but not very well it seems.

whats the formula to take in account wind speed depending on which direction it come from?

And of course height will alter the air density and temperature. Did anyone mention viscosity?

Mark Piercy said:

Why would you smoke in the car with your kids?

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Because of the fire and the superlocking being active?

Saint.V8 said:

I could weigh in on this considering my qualifications as an Aircraft Design Engineer (Anyone recognise half Rho, V squared, S by chance) so don't forget air denisty (Rho) chaps....

Double the velocity quadruples the force acting upon the body......the principles of Fluid Dynamics - as V is squared!

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Yes, that's what I thought but Bemble is referring to the power to overcome the whole lot: air resistance, tractive effort the lot.

oakey said:

And of course height will alter the air density and temperature. Did anyone mention viscosity?

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And binding brakes

I must have been absent from them lessons at sch I'm just glad bemble wasn't my teacher

pete12345 said:

I must have been absent from them lessons at sch I'm just glad bemble wasn't my teacher

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It’s a good job he paid attention and learnt something then !!

How much more power would you need if you turned the headlights on then ????

frog hopper said:

How much more power would you need if you turned the headlights on then ????

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You can calculate it from the wattage of the lamps giving the load on the alternator. You need to know the generating efficiency of the alternator. I'm not going to waste time doing the calcs, but it will only be a small fraction of a horse power.

Datatek said:

You can calculate it from the wattage of the lamps giving the load on the alternator. You need to know the generating efficiency of the alternator. I'm not going to waste time doing the calcs, but it will only be a small fraction of a horse power.

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Maybe just the tip of the horses tail then.

I once worked alongside a scientist - mega brain - type, just for something to do one lunchtime he calculated the extra power needed to maintain his cars speed allowing for the alternator etc but also the extra needed to overcome the effect of the light projected from the headlights.
All way, way over my simple brain, no matter how many times it was explained to me.

frog hopper said:

I once worked alongside a scientist - mega brain - type, just for something to do one lunchtime he calculated the extra power needed to maintain his cars speed allowing for the alternator etc but also the extra needed to overcome the effect of the light projected from the headlights.
All way, way over my simple brain, no matter how many times it was explained to me.

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Think he may have been pulling your leg.

wammers said:

Think he may have been pulling your leg.

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Yeah, I thought it was a **** take but then it was explained (in huge fecking detail) that light is an actual thing, and if you project light out then there is going to be an equal and opposite reaction. I think that was it anyway.

frog hopper said:

Yeah, I thought it was a **** take but then it was explained (in huge fecking detail) that light is an actual thing, and if you project light out then there is going to be an equal and opposite reaction. I think that was it anyway.

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He is correct. In the vacuum of space light hitting an object can eventually move it.

Grrrrrr said:

He is correct. In the vacuum of space light hitting an object can eventually move it.

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So you can go faster at night with the headlamps off. And save fuel that's good to know.

None of the laws of physics apply though if the vehicle is A. A van, B. White C. At least one front seat passenger is reading the Sun or is asleep, at which point the vehicle can travel at the speed of light but requiring no extra power. The only other factor to consider is it’s been snowing and only one lane of the motorway is open at which point the van can create its own lane with only a 1 % loss in velocity.

Have you not seen the video of the wee thingy being shot up into the air purely by the effect of being hit by light? Was a NASA JPL thing
You can only go faster with the headlights off OR save fuel