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Thread: Pictures of your planes
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Old 14th August 2011 | 16:44
  #51 (permalink)  
stiknruda
 
Joined: Aug 2000
Posts: 1,966
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From: Norfolk
ULH - they are venturis - the air driven through them with forward motion causes a vacuum. This vacuum then drives vacuum instruments such as Turn and Slip, etc instead of a vacuum pump.

Stik
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