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Helicopter Crew Chief Duties?

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  • Member since
    February 2003
  • From: Seattle
Helicopter Crew Chief Duties?
Posted by Papa-Echo-64 on Sunday, April 5, 2020 9:04 PM

Boy its been a while since I have posted anything here Big Smile

I have just started my 1/48 Academy CH-46E and I have a question tho not about the kit but one of the main duties of the Crew Chief and I can not seem to be able to get any answers off the net.  

Watching videos of these two birds recently and I am curious about one particular function of the Crew Chiefs.  On start up I see them standing outside the birds with what seems to be a wire cable .....now this is a guess but I think it may be an emergancy shut down button....that makes sense to me and I assume its part of the Chief being the eyes and ears to the flight crew as to what that can not see or hear from their stations. 

Am I close? 

Happy Modeling!

Straighten up and fly right.....
  • Member since
    October 2005
Posted by CG Bob on Sunday, April 5, 2020 9:23 PM

That's the cable for the crew intercom system. 

When I was in the USCG the last two cutters I served on had flight decks.  During startup, one of the cutter crew stood by with a fire extinguisher.  The helo's flight mechanic would stand near the fire watch, with the intercom cable in his hand.

  • Member since
    February 2003
  • From: Seattle
Posted by Papa-Echo-64 on Sunday, April 5, 2020 9:56 PM

OK ....That makes sense! Thank you Big Smile

 

Straighten up and fly right.....
  • Member since
    December 2002
  • From: Northern California
Posted by jeaton01 on Sunday, April 5, 2020 11:38 PM

I can't remember about the CH-47 but all the Sikorskys I worked around had droop stops on the blades and they had to be verified to be working properly before and after flight.  The droop stops limit the flapping (up and down) movement of the blades on fully articulated rotor heads.  If they fail on shut down the blades can drop far enough to strike the fuselage, if they don't work right on spin up they can cause severe vibration and limit the rotor's ability to come in to balance. On an articulated head, each blade can move up and down (flap), move forward and back (lead and lag, usually controlled by hydraulic dampers), and of course rotate about their axis to vary pitch.  The flight engineer is also looking for anything elso going wrong during startup.  The cord is of course for an interphone for communication with the pilots.

John

To see build logs for my models:  http://goldeneramodel.com/mymodels/mymodels.htm

 

  • Member since
    November 2009
  • From: The NYC.
Posted by Ish47guy on Monday, April 6, 2020 9:31 AM

So far all the answers have been correct.  In the army, we call it the ICS cord (internal communications system).  here is a press to talk button on the end of it, along with a gator clip so you can clip it to your flight suit, survival vest, harness, whatever is handy.

This is one of my favorite pics that I took while I was a CH-47 crew member.  I'm on the end of the cord coming out of the front door.

The CH-47 does indeed have droop stops on both heads.  I have seen droop stop failures 3 times since 1992, and yes, they do damage the aircraft.

  • Member since
    October 2004
  • From: Orlando, Florida
Posted by ikar01 on Monday, April 6, 2020 11:30 AM

Most times when I watched a military aircraft get ready to leave the crew chief wouild be in front with his earphones and mic hooked up to to aircraft.  WHen it was time and all things were checked off the c.c. would unhook, close the door to the connection and then return to the front and direct the aircraft out with hand signals.  Sort of like a cop directing traffic.  

In a big rush like a combat surge or with small aircraft they just used hand signals.

  • Member since
    February 2003
  • From: Seattle
Posted by Papa-Echo-64 on Tuesday, April 7, 2020 8:23 PM

Thank you everyone for your help. I can not get started on my 1/48 Sea knight until my photo etch kits arrive ...I ordered the big ed kit for this one.  Happy modeling! 

Straighten up and fly right.....

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