Marc Wiese wrote:

The 1996 corvette GM 12v electric motor driven air pump I have

weighs just

2 lbs, 4 oz. I have no idea what amount of air it will supply yet.

Paul Lamar teased:

Fill a balloon and weigh it before and after :-)
Anybody care to do the math on the results?

Very funny Paul.  Without knowing the "strength" of the balloon, or

at least

the pressure of the air within, one cannot determine the amount of

air the

pump will supply.

BTW, since your considering this pump for vacuum power instruments,

wouldn't

it be better to measure the amount of air it consumes (generating

vacuum)

rather the amount of air is supplies?  :-)

Russell Kent
[See, I can be a smart aleck, too.]

You are missing something Russell. Hint: What does air weigh?

Paul Lamar

snips...

As best I recall, Standard air at sea level weighs approx 0.0756 lbs per
cubic foot.

Ed Anderson

Sounds right Ed. With this info we should be able to calculate how
much air is in the balloon. If we know how long the pump ran to fill
the balloon we should be able to calculate the airflow out of the pump.

Of course the easier and more accurate way is to just hook up the pump 
to the attitude gyro and see if it works :-)

Paul Lamar
 
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