Compressed Air Engine

The cylinder should be of steel or cast iron or aluminum with a steel liner. The piston should be aluminum with steel rings. The rod can be any metal, but aluminum works well. Any rotating surfaces, should have a bearing material (brass, bronze, babbitt ball bearing). The crankshaft needs to be steel and rotate in bearings.

Rajeshbhanushali123 You haven't given much info for us to go on so if you could give all the details we could get more specific. Have you given any thought to making a rotary vane air motor? This would probly be my choice if the details allow. What about using a single cylinder gasoline engine and converting it to an air driven motor? I would think a two cycle would be the design of choice if it has to be of a piston design. J.Conway

Ya definetly i m going to use steam engine principle.But i m going to design the engine having self compressor.

Self Compressor? As in, the air engine turns the compressor, which powers the air engine which turns the compressor, which powers the air engine which turns the compressor, which powers the air engine which turns the compressor, which powers the air engine which turns the compressor, which powers the air engine which turns the compressor, which powers the air engine which............

If this is the case, it smacks of the ever elusive over unity device.

I still don't understand the appeal of the air powered cars. It takes energy to make the compressed air, energy that could be used directly to make the car go. Instead there are steps between making the compressed air, turning the compressed air back into rotary motion, turing the rotary motion into forward motion... at each step losses are incurred.

Travis

"I still don't understand the appeal of the air powered cars."

You can compress air directly with "green" sources, such as wind turbines, avoiding tons of copper for electric devices.

You can store compressed air much more easily than you can store electricity.

There are no scarce or toxic materials involved. It's 19th century technology.

Air tanks can be refilled faster than batteries can be recharged.

Air tanks don't self-destruct if you try to draw too much power, nor do they have to be recycled every few years.

In terms of energy in vs. energy out, compressed air can be more efficient than an electric generator-battery-motor combination. This was demonstrated decades ago, but DOE doesn't want to know.

You don't need huge corporations and infrastructure to support air.

I'd suggest converting an ordinary IC engine (diesel might be best). Change the cam to make it a "two strike" engine. Change the injector to inject air, not too difficult with a common rail system. You want a maximum expansion ratio, but variable. The air engine should be much more powerful than the same-size IC engine.

Or, run a steam engine on air.

http://www.dself.dsl.pipex.com/MUSEUM/LOCoLOCO/diesair/diesair.htm

U r definitly right.I m going to do same method but the compressor is not anothe unit in my engine.I m using steam engine method but using compressed air.When the return stroke is there the air will get compressed at TDC.This compressed air will get way to another tank.Thus efficiency of engine increases for same fuel.

Just tell me which kind of valve can i use ,Rotary or other? Max capacity of fuel tank for comp. air & at how much pressure.

What about a used piston air compressor head assembly minus the motor ... you could even keep the air tank as a reservoir for your "fuel". All you have to do really is to reverse the circuit ... et voila, from compressor to motor in one step.

one of my projects

is the overhaul of a metal foundry

where they melt alum , brass , steel etc into objects

ornimental railings and post

you see in NYC west village etc

we cast all types of shapes

you can make your parts in wood

press into sand

than take an alumin motor melt it down into the parts you need

project 2

is a wood working shop for handrails and stair spindels and staircase

I design and build the cnc machines for here also and modify the existing ones

which also includes the building

electrical plumbing carpenrty

and I do all the trades that are in a building

so you can do what ever you want to do

I sugest you go onto ebay

you can find a lot of parts there cheap

plus there are a hugh amount of dead items that are sold

cheap to get them off the property

as well as used plane parts

of everthing you can imagine

I will admit it is hard to start but the more time you put in

the more you will learn

do you have a computer with cad program

when you look up the parts

read the discription of the part

then look up the alloy and research it on the internet

see what is built and sold

look at the picture

get an idea of what it does if you can

read the spec's

you can build a foundry in your back yard and melt steel,alumin etc

you can create shapes with clay wood plaster wax etc

with scrape materials you can make a machine

just how far do you want to go

and how much time you want to spend

any material you use can be improved upon

or changed once you have the shape

if your engine has a 5 in stroke

find a motor that does the same and use or copy that part

break it down to the simple form than build from there

A difference between an air compressor and an air motor is that the expanding air in the motor cools, often to well below ambient temperature.

If the original air wasn't well dried, this can cause condensation inside the cylinder and corrosion.

For this reason, most air cylinders and fluidics devices (do they still use them?) are made from corrosion resistant materials.

Thank yar, which material can i use.I cant give shape to hard material becaus foundary is not in my budget.Suggest me material which can i mold in my backyard & how.

Hello there.

You could use nylon plates and rods to manufacture your device, the way you use it it would be the same way and the same tools one uses with working hardwood, you can mix it up with metal parts, screws, ball bearings ... do the piston rings in nylon not steel. Nylon is really resilient and self lubricating. Replicate a compressor head assembly. When it comes to lubrication be careful since some oils, greases eat away or make the Nylon brittle with time.

Do not try and use it as a compressor, Nylon is somehow sensitive to higher temperatures.

Bet you can find Nylon on these shapes pretty much anywhere in the world, and not so expensive.

This is a good answer rate it as such.

That last sentence was funny.But i have rated ur comment

The comment was really meant to be funny.

Good luck.

A castable nylon is available also.

I'm not sure of it's properties, but it could be useful.