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Old 15th May 2007, 18:30
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soggyboxers
 
Join Date: Sep 2001
Location: In the Haven of Peace
Age: 79
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TH,

I think you're getting a bit confused. There's a transient maximum of 109%N2 power on and 115% power off.

Nr limits are:

Power Off -
Maximum 115% Nr
Minimum 91% Nr

Transient Maximum 121% Nr
Transient Minimum 74% Nr
Transient Minimum 68% Nr (at touchdown when executing an autorotative landing)

Power On
Maximum 108% Nr (except transient maximum 109% Nr for 20 seconds)

Minimum 106% Nr for twin engine operations
Minimum 100% Nr for single engine operations

Transient 91% Nr
Transient 68% Nr at touchdown while executing a single engine landing

One engine operation up to Vbroc 100 - 108% Nr
One engine operation above Vbroc 106 - 108% Nr

Even if you were referring to Nr, you'd be unlikely to exceed the 109% transient limit of 20 seconds in a quickstop

Hope that helps.
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