Linear piston ratchet engine, 99% efficiency. Proto type in action!

[Tommey Reed]

P. S.: To come back to the calculation in your former posting:

I have not understand the line in your calculation above:

"having a 4" gear or 4"/2= 2" then we can take 314 psi x 2"= 628 psi or 628/12=52.33 foot pounds"

what means the /12 in the calculation?




If we start with say 12 psi injected in to a piston area of 4", this piston have an area of (pi *(2^2))=12.56in/sq. 12psi x 12.56=150lb of force for each 1" of piston movement.

Lets say when building a ratchet engine, we start with a gear that is 4" diameter, gear has a circumference of (pi*4)=12.56in
So if say the rack moves 12.56 inches the gear will travel 360deg or 1 complete revolution.
The 6.28ft is the circumference of a 24" wheel to get a foot pound reading, if you have a constant of 10lb then you produced 62.8lb of work for each revolution of the shalf.

Tom

This is another prototype i'm working on.

http://www.youtube.com/user/OverUnityNow1#play/all/uploads-all/0/uANsNE2N8sk

[AlanA]

Thanks for the answer and the link for your prototype of the ratchet engine. Very impressive.

In one of your former postings you have shown this chart:

This all depends on many factors, If 300 psi  at 1 cu/in is in jected in to say 1cu/in piston each movment of the piston rod will travel at a psi rate of:
1" movement = 300 psi
2" movement = 150 psi
4" movement = 75 psi
8" movement = 37.5 psi
16" movement =18.75 psi
That is also if the air is turn off after 1cu/in of volume is used at 300psi injector...

Is there a formula for the calculation of the pressure loss during the movement in the cylinder?

Alana

[Tommey Reed]

We can look at a scuba tank to start with...
96cu/ft scuba tank at 3200 psi can be calculated on run time, it takes about 5hp compressor for about 20 minute to fill 96 cu/ft tank.
3200/14.7=217.7cu/ft if the scuba tank was 1cu/ft.
217.7/96=2.26 or 3200 scuba tank has an area of 3200/2.27=1409.7
1409.7/14.7=95.9cu/ft... 1cu/ft=1728cu/in....

1/2.27=.44 cu/ft of total area in a scuba tank, its not 1cu/ft at 3200psi.

So now we can calculated how long a engine can run on 1 scuba tank of 3200psi of air...

If we have a contant air flow of 12psi going into a piston say 1in/sq with 12" stroke for each revolution of the crank shaft.
If using my Ratchet Engine design this would produce 12ft/lb per revolution of shaft.
This will use (1" piston area x 12" stroke)=12cu/in
33000/12=2750 rpm's will make 1hp.
this will use a total of 33,000cu/in of air, or 33,000/1728=19.09cu/ft per minute
We know that a scuba tank has 1409.7 and now we can find out total storage at 12psi...
1409.7/12=117.475cu/ft total volume at 12psi.
117.475/19.09=6.15 minutes run time on 96cu/ft scuba tank..
The lost in not the engine,but the compressor charging the scuba tank.
At lower pressure like 12psi and small motor could make a constant feed of air to suppy this air engine...
If 1hp makes 4cfm at 90psi in one minute, then it should be able to make 19cfm's at 12psi constant.
Solar could be use to make 12 psi, even wind mills with a compressor could be charging a air tank...
Just some thoughts on how air can be made...

Tom

[AlanA]

Thanks. You have answered more than I want to know.

12 PSI? Could this be real? This is a pressure less than the atmospheric pressure of about 14 PSI!

But I have another question you may could anser?
What means CUT OFF in the context of air engines?

Alana

[Tommey Reed]

Cut Off, could mean that you inject a volume of compress air, say 1cu/in at 200 psi. This could then be allowed to expand  until all that energy is zero.... So 200 psi at 1cu/in volume wil produce 20cu/in at 10 psi.
But its much more efficient to work with 20cu/in at 10 psi, the 200psi at 1cu/in. It takes less time to compress at 10psi with a volume of 20cu/in the compress 200psi at 1cu/in.....
In other words:
If you have 200psi lifting 200lb in one inch taking 1min to reach 200psi, it would take less time and energy to make 10psi with an area of 20in/sq to lift the say weight.
The reason it is more efficient at lower pressure is how hard the compressor needs to work at a higher air pressure. So lower psi the faster the air can be pumped at a great volume.
Just look at a basic house fan, higher volume& lower pressure= low hp....Air compressor at higher pressure& lower volume=geater hp

Tom