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Old 22nd Jul 2004, 13:26
  #96 (permalink)  
HOSS 1
 
Join Date: Oct 2002
Location: USA
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Limiters

Was out flying yesterday, so I took a few snaps for you.

Here is a picture of normal operations. The rotor is governed at 107%, and the torque and N1 are well below limits. (N1=90.3, 46/48 torque)



This next picture shows what happens if you just keep pulling the collective (in a S-76c+) and the ambient conditions are such that you'll hit the torque limiter first. You just keep pulling up on the collective, you'll "hit" the torque limiter, and the rotor starts drooping from its nominal 107%. The S-76 has a "soft limiter" that allows you to overshoot a bit, and slowly brings you back down to the hard limit (100% dual engine in this case).



You'll notice I've taken the picture while we're in the soft overshoot.

I also took a picture of drooping the rotor against the N1 stop, but it's too big to add to the post, so click HERE to see that. Hard to see, but if you look closely, the N1 is hard against the 2 min stop and the rotor is drooped down to about 100%.

Hopefully, the pictures help, or are a bit entertaining.

HOSS 1
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