PPRuNe Forums - View Single Post - Interesting note about AA Airbus crash in NYC
Old 17th Jan 2007, 02:06
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Mad (Flt) Scientist
 
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To add to the above. On at least some of our (non-Airbus) designs which incorporate rudder travel limiters, the mechanics of travel limiting are similar to the Airbus system (i.e. fixed pedal/rudder gain) as opposed to the Boeing (variable gain) system and pedal travel of the order of 1/4 full travel at 250kts is entirely plausible.

If you consider that you'll want full travel at low speed (say 125 kts) and assume that your travel limits are simplistically set for a constant rudder*Q, then at 250kts you'd have 1/4 travel, and at 375kts you'd have 1/9 travel.

I certainly wouldn't place anecdotal and qualitative simulator evidence ahead of properly analysed engineering test data.
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