Interesting story for anyone who flies IFR in a single!
Join Date: Jul 2007
Location: France
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Tmbstory
The discussionon vac pumps (both wet & dry) & suction or pressure air systems has been around for a long, long time, giving much good information to pilots. It shows the value of knowing the systems in the aircraft that you fly.
The Beech 60 & 70 model Queen Airs used in the early commuter days in Australia, were fitted with the instrument pressure system & it worked well. The aircraft also had an "augmenter exhaust system", which in certain circumstances could cause an engine cowling fire / smoke problem during the start-up phase. The discharge of the ground fire extinguisher into the cowling, gave the ground engineer attending the start-up, much heart ache , cleaning & rectification work because of the extinguisher substance contaminating the instrument air system.
The Beech 60 & 70 model Queen Airs used in the early commuter days in Australia, were fitted with the instrument pressure system & it worked well. The aircraft also had an "augmenter exhaust system", which in certain circumstances could cause an engine cowling fire / smoke problem during the start-up phase. The discharge of the ground fire extinguisher into the cowling, gave the ground engineer attending the start-up, much heart ache , cleaning & rectification work because of the extinguisher substance contaminating the instrument air system.
