I believe most alternators that have both ends open if that makes sense have dual internal fans, some have a single
external fan, but that’s usually older lower output alternators.
dual internal fan alternators will come up with many hits, but I’d suspect all marine
high output alternators have dual internal fans.
Aircraft starter generators you have to load them to full capacity and monitor
the case temp where indicated, the GE generator
was unusual as you didn’t monitor
case temp, they required x amount of pressure in the duct, we failed the test as I used a NACA inlet duct, cause they look cool, and to keep from having to change the design, I put a scoop on top of that NACA inlet, which of course is stupid, but we were late on Certification
as it was, and our Engineer
wanted to incorporate the SG cooling duct into the oil
cooler scoop, which would have been better, but would have caused a whole lot more flight testing, cause you have changed the oil
cooling system too.
So I’m sure to this day that all Thrush S2R-H80 aircraft have a scoop mounted on top of a NACA inlet. I wonder how many think it works better that way
This is what I cobbed up to load up the generator
, it’s 8 1,000W aircraft landing lights, we put them in the hopper and had to fill it with water, or they would set the airplane on fire, which meant of course that I had to land with 4,000 lbs of water too.
Sorry for the thread drift.
On edit after some thought, they may have been only 600W lights.