Bell 412EP
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Join Date: Apr 2011
Location: Pakistan
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Bell 412EP
hi all,
my questions are:
1. in 'emergency load' mode, why does AP2 remain available? would it be the same if AP1 remained available and not AP2?
ANS 1: no difference..ap2 remains on cz emergency bus 1 powers up inv 1 and inv 1 powers up AP2..
2. if eng no2 overspeeds, say its n2 103 %. no1's n2 is 100%. now the Nr (rotor RPM) would match no1's n2 as per the maintenance manual. how would the clutch (the free wheeling device) allow the low RPM (100%) to be matched with Nr against a higher RPM (103%)..
my questions are:
1. in 'emergency load' mode, why does AP2 remain available? would it be the same if AP1 remained available and not AP2?
ANS 1: no difference..ap2 remains on cz emergency bus 1 powers up inv 1 and inv 1 powers up AP2..
2. if eng no2 overspeeds, say its n2 103 %. no1's n2 is 100%. now the Nr (rotor RPM) would match no1's n2 as per the maintenance manual. how would the clutch (the free wheeling device) allow the low RPM (100%) to be matched with Nr against a higher RPM (103%)..
Last edited by caviator; 23rd Jan 2013 at 09:51. Reason: adding question/ans
Join Date: Mar 2002
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1. in 'emergency load' mode, why does AP2 remain available?
ANS 1: no difference..ap2 remains on cz emergency bus 1 powers up inv 1 and inv 1 powers up AP2.
2. if eng no2 overspeeds, say its n2 103 %. no1's n2 is 100%. now the Nr (rotor RPM) would match no1's n2 as per the maintenance manual. how would the clutch (the free wheeling device) allow the low RPM (100%) to be matched with Nr against a higher RPM (103%).
Join Date: Jul 2010
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AP2 is on the Captains side but the reason it stays on is because Number 2 inverter is lost when emergency load is used. AP's are powered by the opposite side inverters. IE AP1 - inverter 2/ AP2 Inverter 1
Join Date: Nov 2008
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412EP Offshore range
I dont have the manuals so can anyone with a few minutes going spare tell me the range (at 120) of a typical offshore spec EP at SL, ISA, 12 pax and IFR fuel?
(alt is a 180 back to shore)
I will be getting tested later on
(alt is a 180 back to shore)
I will be getting tested later on
Last edited by capt tosspot; 6th Mar 2013 at 05:35.