[R-390] OT- Army training manuals online?

[bw]

This is a little off topic, but I'm looking for a specific training manual
in downloadable form. I think it was TM 1-151, Rotary Wing Aerodynamics.
Maybe it was TM 1-51. It's been a long time and I've lost some good links to
military publications. I'm hoping that somebody has the link to it, or links
so that I can search around.

Thanks in advance,


Barry