to hell with turbo... Jet power is here :)
- Thread starter posol
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Loco Honkey
Banned
Wow, welcome to like, 25 years ago!
Now, to further that idea one step... have the exhaust gas from the first turbine entering the turbine inlet of a second turbo, but have the shaft of the second turbo driving something like a tire, for instance. You'd have to seriously gear it down, use truck turbos, and it'd be highly inefficient, but you could do it.
Essentially, you're building a turboprop engine, but instead of a prop, you're turning a wheel.
Now, to further that idea one step... have the exhaust gas from the first turbine entering the turbine inlet of a second turbo, but have the shaft of the second turbo driving something like a tire, for instance. You'd have to seriously gear it down, use truck turbos, and it'd be highly inefficient, but you could do it.
Essentially, you're building a turboprop engine, but instead of a prop, you're turning a wheel.
Capt. Orygun
Win the Day
A turbo prop/wheel driven car lol! I work on C130s (turbo prop), if 4 of those engines can move that pile of steel imagine what one could do for your car
Loco Honkey
Banned
Ah, the Herky Bird. Well, y'see... those are much larger than what I'm figuring. I'd imagine that two truck turbos set up ala turboprop fashion would generate about 25 shaft HP and consume a shitload of propane... They'd also be heavy because you'd need an oiling system, electrical system to ignite the fuel, and compressed air on board to start the turbine if having an APU isn't practical.
I had seriously considered building two engines like this and mounting them on the wings of a MiniMax ultralight, but for one, the FAA wouldn't be havin' any of that, and two, it just wouldn't be practical. Cool, yes. Practical, no.
Loco Honkey
Banned
Wow, so all Iraqis are stupid? Even the doctor that saved Jessica Lynch? Remember him? The guy that saw her being tortured in the hospital, then approached the US Military, who could very well have shot him, told them about her, then went back to check the place out, then went back again to the US Military, all the while dodging fire and crossing the battle field... Think he's stupid?
Nay, he's not stupid. Saddam is stupid.
Please, try not to be too ignorant. I don't want it rubbing off on me.
Nay, he's not stupid. Saddam is stupid.
Please, try not to be too ignorant. I don't want it rubbing off on me.
98integrals
Senior Member
why do that?
just strap the engine to the frame of the car. jet engines dont make torque they make lbs of thrust, ie they dont do very well at spinning things, just pushing them.
and on a related note-
2 weekends ago they had Jet cars up at the local strip, fastest pass of the night was a 5.21x @ 304 mph
Loco Honkey
Banned
Why not? A truck turbocharger is only going to make a few lbs. of thrust, unless you spend many hours researching and designing a nozzle. And even then, off the line acceleration is going to suffer because the engine is static- meaning, it's not moving. Part of the reason why turbine engines create tremendous power is because as they move, they're ramming air into their inlet. At low airspeeds (groundspeed, in this case), a turbine makes dick for thrust. That's why an F-16, even in afterburner, can get owned by a Corvette to about 120 MPH.
By mechanically linking the engine to the wheels, you have much more torque at lower speeds. To put it in automotive terms, it's the difference between an automatic (turbine) and a standard (turboprop). You still have to deal with turbine spool up, but that's no different than flying a turbine powered aircraft- you anticipate the need for power before you actually need it (on a side note, this is why 95% of the drivers out there would make shitty airline pilots).
and on a related note-
2 weekends ago they had Jet cars up at the local strip, fastest pass of the night was a 5.21x @ 304 mphÂ
Jet as in rocket or turbine? I'm willing to bet that they were rocket powered. But either way, we're probably talking about 40,000+ lbs. of thrust in a sub 6,000 lb. vehicle. Drop the thrust down to equal the power to weight ratio of a Type R, and I'm willing to bet that a Yugo on a bad day would smoke it.
98integrals
Senior Member
not rocket powerd.
these were turbofans (i think) bolted to a frame, with a seat and some alumium on the outside to make it look like a car.
these were only making 10-20,000 lbs of thrust (my guess, no real proof) and couldnt have weighed more than 1500-2000 lbs.
and you are exactly right as far as spool up goes. look at their Et: low 5, now look at the trap speed: 304...normally a 300+ trap means a 4.xxx but because these jet cars have "no" low end power and do not have gears like a normal car they cant accelerate as well off the line as say a top fuel dragster.
these were turbofans (i think) bolted to a frame, with a seat and some alumium on the outside to make it look like a car.
these were only making 10-20,000 lbs of thrust (my guess, no real proof) and couldnt have weighed more than 1500-2000 lbs.
and you are exactly right as far as spool up goes. look at their Et: low 5, now look at the trap speed: 304...normally a 300+ trap means a 4.xxx but because these jet cars have "no" low end power and do not have gears like a normal car they cant accelerate as well off the line as say a top fuel dragster.
CXhatchboy520
Junior Member
Yeah, id bet it was a P&W JT8D-200 (McDonnell Douglas MD-80/DC-9) Turbofan engine (15-25,000 LBS of thrust). Anything bigger, say a CFM-56(Boeing 737-300, 400, 500, New Generation, 25-30,000 LBS of thrust) wouldn't be so small 
. It also could have been a business aircraft engine, say a GE CF34 (Canadair CRJ, 7000-8000 Lbs of thrust). But i think the most likely engine was that of a fighter jet. Say one off an early jet, like an F-4(est. between 7,000 and 10,000 Lbs of dry thrust for each engine, and about 10-14,000 Lbs of wet thrust *afterburner*) .
. It also could have been a business aircraft engine, say a GE CF34 (Canadair CRJ, 7000-8000 Lbs of thrust). But i think the most likely engine was that of a fighter jet. Say one off an early jet, like an F-4(est. between 7,000 and 10,000 Lbs of dry thrust for each engine, and about 10-14,000 Lbs of wet thrust *afterburner*) .
convertedstangbanger
Senior Member
omg
thats all
thats all