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Old 10th Sep 2010, 18:30
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JHR
 
Join Date: Dec 2003
Location: USA
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412 Start

During the mid 90's I flew with a Bell flight instructor in a BH212. His technique was to set the throttle just below the idle detent prior to engaging the starter. His explanation was it takes at least 12% N1 speed for the engine driven fuel pump to develope the required pressure to activate the fuel flow divider and primary start fuel nozzels. The company I work for has been using this start technique without a problem on both 212's and 412's for the last 17 years. I have witnesed another operator have a engine hot start using the Bell flight manual technique. After engaging the starter the throttle was rolled open above the idle stop, the battery voltage was to low to complete the start and to low to open the idle stop and abort the start.
Ouch!!

JHR
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