[P @ F]

Anybody know what it is at max speed , i only ask as i have been having a mess around in the shed again 
I saw a few vids on stoopidtube the other day regarding turning DC motors into generators , as i had a spare not so good pump in the pile i thought i would have a play around , i took the pump assembely off and whacked a drill on the shaft of the motor  to see what it would put out in the way of volts .
I got a rather good result of 14.6 volts which is bang on for charging purposes , kind of what you want from a vehicle alternator with the advantage of not having the van running all day , this is where the problem pops its head up , i had to crank the drill up to 3000 RPM to achieve it .
The 2 hurdles are .......  1 . I really dont think that the pump goes anywhere near that !
                                                2 . I think i may have welded up the bearings   
 

[Spruce]

Anybody know what it is at max speed , i only ask as i have been having a mess around in the shed again 
I saw a few vids on stoopidtube the other day regarding turning DC motors into generators , as i had a spare not so good pump in the pile i thought i would have a play around , i took the pump assembely off and whacked a drill on the shaft of the motor  to see what it would put out in the way of volts .
I got a rather good result of 14.6 volts which is bang on for charging purposes , kind of what you want from a vehicle alternator with the advantage of not having the van running all day , this is where the problem pops its head up , i had to crank the drill up to 3000 RPM to achieve it .
The 2 hurdles are .......  1 . I really dont think that the pump goes anywhere near that !
                                                2 . I think i may have welded up the bearings   

The voltage is the carrier, but its the amps output that determines how fast the battery will be charged.

Engine audio output is how the Formula 1 teams 'spy' on their competitors. They can also tell exactly how an engine is performing using audio.

How about this?
https://www.youtube.com/watch?v=aZ0Ogv8Tg9s

[P @ F]

That is a good idea , there really is an app for everything !

[Spruce]

That is a good idea , there really is an app for everything !

Not everything! I've looked on Play Store numerous times and I can't find one that will knock 20 years off my life.