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oltmannd 1. Drivetrain efficency: Please - get a data for a dyno for a truck. 400 hp engine usually is about 250-270 hp on the road. Friction clutch - its efficency is in the area i showed - I could show you data for it (from my engineering books), but I have it in polish, so obviously it has very little use for you. Actually - for friction clutch efficency drops as torque goes up. Shaft - shafts are tricky - their efficency depends on their length (the longer, the lossier) and diameter (the bigger diameter, the more efficent). In practice you aim for 97-99% efficiency when designing it. [quote]QUOTE: If the clutch, shaft and suspension were eating as much HP as you suggest, you wouldn't be able to grab the universal jt. or shock absorber with your bare hand - which you can.[/quote] Huh? By grab i understand "deform" (ie - pretend to see how they work). You see - there is a difference between playing with something, and designing something for 100 or more hp and one God knows how much torque. 2. Headlights. [quote]QUOTE: 60Wx 3.413 Btu/hr/W x 1gal/15000Btu x 1/.20 engine eff. x 1/.95 alt eff. = .07 gallons/hr[/quote] The only problem I see here is the fact that a gallon of diesel is about 130000 to 140000 btu. But apart from that... A gallon of diesel = 151 MJ 400 watts = 1,45 MJ/hr 151*0,35 = 52,85 MJ 52,85/1,45 = 117 hr/gal = 0,0085 gal/hr [quote]QUOTE: Way more casualties and injuries than on the highway - and they are wearing full harnesses and helmet and not running with 3 ton SUVs and UPS delivery trucks! Most formula 1 crashes are at less than 100 mph. They may run speeds up way past 100 mph, but rarely do they hit anything hard directly at those speeds. When they do, they are toast. Just look at what happens to those larger (and safer) Indy cars at Indy.[/quote] They do 100mph average speeds, oftem more. So obviously most crashes are at 100+ mph [quote]QUOTE: Fuel will NEVER be $20/gallon in our lifetime (adjusted for inflation). You could reform coal gas into gasoline for much less, but we don't even need to do that. Technology exists to make perfectly useful transportation fuel from coal for $2.50/gallon. It's just waiting for oil to reach a sustainable high price before someone invests in a long-lived plant to convert coal. I'll bet within 2 years the price of crude is below $35 and gas is selling for $1.50 to $2.00/gallon. The current high price will lead to a mini-glut that not even OPEC will be able to stanch. It has happened both other times crude spiked. It'll happen now, too.[/quote] You really should make yourself familiar with the concept of EROEI.
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