Building air pressure scooter?

[SteveC]

Probably for most people electricity power would be easer to come by than tank air. It's very easy to charge a battery, but expensive to fill a tank.

 

[mohave_steve]

Take a look at:

FergusonEngineering.com - Micro Motor products

They have air motors that may work for this application.

 

[moneysavr]

As said the Air tool is the way to go,they can be purchased by the volume of air used per min and power,and run off the low pressure line of your reg,

you will get about 10-15 min of diver pull from a AL 80-wish I had a pick it strapped to the tank and fan-propeller in center behind regulator valve air tool chuck holds fan propeller shaft,

 

[engdiver]

Another possible link. Various air motors.

ACTUATORS AND AIR MOTORS

 

[miketsp]

Another possible link. Various air motors.

ACTUATORS AND AIR MOTORS

Nice.
You'd just have to ensure that no water gets in. Put a non-return valve on the air outlet and ensure that there is a very slow bleed of air from the throttle regulator even in the "off" position to keep the motor always pressurized above ambient.

Also to avoid contaminating the environment with the air/oil mist required you can now get environmentally friendly 2 stroke oils that dissolve in water for nautical use. So you should use this type of oil in the lubricator.

 

[DA Aquamaster]

When I was younger I used to design and build free flight aircraft using CO2 powered motors. They are basically a single cylinder expansion motor with a piston and rod that turns a rotary crankshaft. The advantage to this design as compared to a impeller or turbine design is that it is much more efficient with virtually no blowby.

A motor like that would work equally well with air but CO2 offers the advantage of a consistent working pressure and storage of the "gas" as a liquid under pressure offering much more gas volume and a longer run time from a given cylinder size.

 

[meesier42]

what you need is one of these motors. Angel Lab's MYT engine

based on air motoring it was tested to produce 800ftlbs of torque on 150psi air. Granted the volume that you would use is way more than you have, but you don't need 800ftlbs of torque either.

 

[24940]

I've run the numbers using various modern, high efficiency drives and it isn't practical. The volume just isn't sufficient to provide much more than 10 minutes of trigger time with an AL80. There are also back pressure issues that would need to be resolved.

Great concept, though.