John wrote:
"Rhodesst" wrote in message
...

According to the article they only had a 25° nose down attitude. It
looks alot worse than that in the picture. Since most helicopters of
this size typically lift twice there own weight (when empty). I would
estimate that the maximum theoretical nose down angle whould be 60°.
This gives you a thrust vector component of twice youre vertical
component. However the transmission lube systems would not like this at

all.

John Roncallo

As long as you can maintain a vertical component of lift equal to the

weight of

the helicopter, you'll be Ok. Either way, that looks like one hell of a
balancing act.

I don't know for sure but that looks like it might not be too much

different

from a simple (huh?) hover with a heavy sling load as far as control

imputs are

concerned. Of course, I'm probably wrong about that. It's never that

easy, if

hovering is considered easy. :-)

Fly Safe,
Steve R.


Ok i have read all the posts up to 23rd dec on this thread, i understand
it's some sort of an illusion.

I know next to nothing about sling operations.

I'm just surprised that no one seemed to think about the principles of
dynamic roll over and try to apply them here ?

I know the sling load probably isn't stuck to the ground ..but could become
stuck, then there is inertia and acceleration considerations, i have only a
fuzzy understanding of all this ...but i think that the maximum nose down
angle when towing would be a lot less than
anyones gut feeling or quick calculation based only on thrust to weight
ratios and thrust vectors.

Do i have a point ?
I'm sure someone will elaborate on this?



There is no potential for DR. Because of the sling load is still within
the correct CG envelope.

JR