Driving a few posts by hand with a post driver can be fun, but driving a bunch of posts is too much like hard work. Next time get a little help driving from your air compressor by hooking it up to the Striker TS air operated post driver.
The post driver can drive posts up to 1-3/4″ in diameter using only 2 CFM of oiled air at 80-90 PSI. To use the driver, connect your air hose to the air port in the handle and place the driver over the post. Hold onto the driver with both hands and lift the black handle which lifts the internal weight. Then pull down on the driver with both hands to drop the weight. The driver can produce up to 60 drives a minute.
The Striker air powered post driver runs about $400 plus shipping.