Testing an aerodynamic boat tail - 15% better MPG - Geo Metro

[josephdupont]

Proud of you.. but is it legal?

does the exhaust come out of the back or underneath.

You could use that extra space for sleeping quarters to live in your car.

[josephdupont]

Proud of you.. but is it legal?

does the exhaust come out of the back or underneigth.

[josephdupont]

is it really legal??

[evlogix]

As AndY1ksi stated, the efficiency gain is actually greater at higher speeds if you consider the energy outputted. The motor, however, *might* be less efficient at 70 mph as opposed to 56 mph, but that will ultimately depend on your gearing.

[DanFrederiksen]

very interesting experiment.

I think the tail has to be flat to the ground side though since you can't suck in air from the ground. will only create a vacuum with turbulence.

plastic sheet cover under the car might also improve the drag.

what we really need though to really explore aerodynamics is a good freely available virtual vindtunnel software. they either suck or cost a trillion or only works under some obscure linux bullshit.

a windows application running on GPU. now!

[AndY1ksi]

Excellent testing!

The fuel consumption difference would be even higher, at higher speeds.

The power to move (throttle) an object through the fluid (air) increases by the power of 3 in regards to speed.

The energy (consumption) required to move the object from A to B increases by the power of 2 in regards to speed.

[Yeltuh888]

I don't wanna take off...

just drive forwards.. and just as spitfire1983 says (thank you btw) just fill it up! now bring down the damn fuelprices! please..

[mr82769]

Erhm... Who are you talking to when you say "bring down the fuel prices" ?

[Yeltuh888]

generally speaking

or to myself..

[DanFrederiksen]

@Yeltuh888 no fuel prices should go up and up. gas car has to go

[sonicballer8888]

@Yeltuh888

the reason fuel prices went up is because you guys are still buying them with your expensive bad for the environment cars. so blame yourselves.

[spitfire1983]

Nice for you that you established such a fuel reduction.

But I don't give shit about fuel consumption, just fill it up and put the pedal to the metal.

[ThomasD1962]

Lower the a car about 1,5 inch and raise the tail a bit and hey presto! Another 10%!

[danich45]

this is butt ugly and un safe to drive. no state will allow it to pass safety inspection but it's also worthless since the chevy volt gets the equivellent og 230 plus mpg and soon 300 to 400 mpg without the dorkmobile look

[Crodon]

You actually belive that shit Danich? You're a fool.

[monstrera]

boeie

[ChrisvdH88]

Smile, je staat op Geenstijl!

[darkwizzard]

very cool man would like some music added even if it's just the youtube supplied ones though.

[rickylarch]

Nice work, and lot's of it. Inspirational. Can't wait to see the final version.

O4b