Originally Posted by
tartare
Thanks SAS - that's a really interesting read.
Interesting comments about impulse noise not generally being audible to crew in the machine,,. certainly the case in the Huey, although I was pretty sure I could hear increased blade slap in high G turns.
Is it the same in the Chinook?
I flew the Bell 412 (Griffin: twin-engine Huey) then the Chinook HC2. The blade slap in the Griffin was loud when pulling power in a turn at low-level. When flying around Shropshire there were so many horse stud-farms and noise complainers on the local avoids map. LL flight planning was like threading the eye of several needles. Same in the Chinook - heavy aircraft, lots of power in a turn = blade slap.
From my logbook, ZA718 BN was a HC2 in 2002. The 2 and 2As became HC4s.