PPRuNe Forums - View Single Post - Why must I have a slip and turn indicator?
Old 16th Feb 2014, 00:07
  #41 (permalink)  
Tankengine
 
Join Date: May 2001
Location: Sydney
Age: 60
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It's all just historic, T&Bs were electric, AHs were pneumatic.

The rules on instruments are very old, don't expect the department of hanging names to keep up. ( or manufacturers)
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