stupid thought
- Thread starter ochretoe
- Start date
It's been done, but I digress; I happen to know a little bit about high pressure gas due to my last job...
Let's see, say that you have a nearly stock 200 and your max nominal airflow is in the range of 250 CFM @ Atmospheric pressure. If you wanted to approximately double your power output, that would requre you double the pressure @ the same volumetric flow rate, for approximately double the mass flow rate - Thats about 37 lbs of air a minute.
Say you want to do this for 15 seconds or so, long enough to get down the 1/4. That's close enough to 10 lbs of air. If you wanted to store this at a sane pressure, say 3000 PSI...
Wait a minute, I am re-inventing the wheel. A standard gas cylinder of size T holds between 275 and 300 SCF (stadard Cubic Feet) of gas. That means that, rounding to practical terms, you would need TWO T bottles of compressed air @ ~ 2700 PSI to supply your stock 200 @ an equivilent of ~ 15 psi of boost for 15 seconds.
A T bottle is about 5.5 feet long and 12" in diameter, and weighs on the order of 200 lbs. Throw two of those on your car along with a regulator with a large enough flow rate ($$$$$$) to empty the two bottles in 15 seconds and associated plumbing and you could make it happen.
A regulator capable of doing that would be on the order of $20,000 at least, and you would have other problems to deal with as well. I don't think the valves that come on the high pressure bottles have a high enough flow capacity.
Technically feasable? certainly. Practical? No way in hell...
Let's see, say that you have a nearly stock 200 and your max nominal airflow is in the range of 250 CFM @ Atmospheric pressure. If you wanted to approximately double your power output, that would requre you double the pressure @ the same volumetric flow rate, for approximately double the mass flow rate - Thats about 37 lbs of air a minute.
Say you want to do this for 15 seconds or so, long enough to get down the 1/4. That's close enough to 10 lbs of air. If you wanted to store this at a sane pressure, say 3000 PSI...
Wait a minute, I am re-inventing the wheel. A standard gas cylinder of size T holds between 275 and 300 SCF (stadard Cubic Feet) of gas. That means that, rounding to practical terms, you would need TWO T bottles of compressed air @ ~ 2700 PSI to supply your stock 200 @ an equivilent of ~ 15 psi of boost for 15 seconds.
A T bottle is about 5.5 feet long and 12" in diameter, and weighs on the order of 200 lbs. Throw two of those on your car along with a regulator with a large enough flow rate ($$$$$$) to empty the two bottles in 15 seconds and associated plumbing and you could make it happen.
A regulator capable of doing that would be on the order of $20,000 at least, and you would have other problems to deal with as well. I don't think the valves that come on the high pressure bottles have a high enough flow capacity.
Technically feasable? certainly. Practical? No way in hell...
Not to contradict our fluid dynamics engineer, but there was a system made some time back that did this. It involved a tube with a nozzle in the middle. The nozzle pointed toward the engine. When compressed air exited the nozzle, it did so at high speed, and that high speed air created a vacuum which was supposed to then suck in additional air. It is similar to a venturi effect. It would only work for short time, but it was not bulky. Don't know why it didn't make it on the market. Probably because most people would not carry a simple compressor to keep the pressurized bottle charged.
Now, lets mount the two cylinders with the valves pointing towards the rear of the car. :idea: Then we can get two people to stand on either side of the car with hammers and simultaneously knock the valves off. 
WAAAAAAAHOOOOOOOOOOO!!!!!! Could I get enough thrust to impress my buddies? 8)
Stubby":2rvi8zic said:
Could I get enough thrust to impress my buddies? 8)
About ~4500 lbs thrust @ full pressure.
BIGREDRASA":28unn5do said:
Well, that's a slightly different scheme and I would have to think for a while as to whether or not that sounds feasible. Sounds a little fishy to me as you have described it.
Also, I am a thermal engineer who is currently working in the acoustic & vibrations field. I just play a fluid engineer on TV.
ochretoe":35b9v4b8 said:
Thats what you are doing with Nitrous.
the Nitrogen component is a stablizer. You could inject pure oxygen but it would be extremely finicky and if you didnt have things just right would destroy your engine in faster than you could blink. Adding a lot of nitrogen to the mix in the from on N20 (as opposed to O2) makes it a lot more passive.
In some ways. N20 is a monopropellant however and with sufficient activation energy (or catalyst) will decompose quite exothermically all by itself. That's how Scaled Composites lost 3 engineers last summer.
