Top Speeds

[Never had any say Panda]

Umm I'm aware if the need for gearing to reach higher speeds but power plays a massive part. As the force on the front of the car imparted from the air you need more power to achieve the higher speeds. I'm not sure if the stock FG gearbox could go 300 but even with a very long straight on stock power I don't think it'd be able to get there if it was geared suitably. Maybe redoing the gearing and the differential.. But I still reckon she's gonna need a decent amount of push to break 270km/h area.

[arronm]

With enough power over 300 would be easy. A 350rwkw car would do it. Its the speed of the stock tailshaft I would be concerned about. Ask DOC he knows all about tailshafts.

[Wenier]

  On 31/10/2011 at 6:26 AM, fordfreak1 said:

lol at needing power to get high speeds hahahah seriously

Of course you need power, you need it to overcome drag. And when talking veyron speeds its that extremely high speed that starts the effect of a exponential drag curve until you break through the sound barrier then drag lessens again.

[Paulie2256]

A few of you boys have never heard of aerodynamics or air resistance/drag.

The faster you go, the more air you have to push.

When you double the speed you need 4 times the power. At double the speed the work is done in half the time which means to do 4 times the work in half the time again you will need 8 times the power. 8 times the work in half the time you will need 16 times the power and so on.

It doesn't make a difference whether you have a lambo or a truck, the same principal applies. Only the truck will need a lot more power than a lambo.

Just like an xr6t will need a lot more power than a veyron.

[sexual harrassment panda]

I had stasted that my basic stuff wasn't including wind/drag etc. I was working on the twice the speed takes 4 times the power rule. Well aware of the affects of aero at high speeds.

As for fordfreak's comments I'm confused mate.

The zf with a 2.73 diff will pull 230 in 4th, check the revs at 100k's in top gear and you will see that 300k's would be a piece of piss with stock ratios and rev limiter.

Of course you need power to go faster, I had only used 230k's as the limit because that's what they are limited to stock, I've got no doubt the'd hit 245 with enough road.

[Paulie2256]

Mate that wasn't directed at you. Was just a general consensus after reading everyone's comments.

If you were using the above rule then you would only be calculating drag. That's what I was doing to show that power is the biggest factor in speed. What you meant to say is your calculation didnt take into account gear ratios, drivetrain power loss, tyre friction/gravity. Without drag a car would only be limited by these factors.

Edited 01/11/11 01:37 AM by Paulie2256

[sexual harrassment panda]

On a side note, how's that new triple engined outright speed record car coming along? anyone got any news on this thing http://www.dailytech.com/Bloodhound+SSC+Plans+1000+MPH+Land+Speed+Record+Attempt/article19155.htm

[mrm1tch]

well this turned from "who's found the longest road" to a physics lesson

[bossmang]

just saying power isnt everything, like riding a bike for eg, smaller gear you are peddling faster but no top speed. bigger gears are slow to take off but you will get a higher speed. all with the same power (ie the rider).

pfft this debate could go on forever. lets keep it back on topic then.

[tab]

So what speed/how much power would an aeroplane on a treadmill require to take-off?