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CockpitBuilders.com - Main => General Discusion Board. => Topic started by: jackpilot on April 20, 2019, 09:35:48 AM

Title: Bernard...info
Post by: jackpilot on April 20, 2019, 09:35:48 AM
What the **** is that heavy gizmo (747)

https://www.ebay.com/itm/Boeing-747-400-Counter-Balance-Airborne-Avionics-Assembly-258T1190-8-Seviceable/372655695954?epid=8029147784&hash=item56c402a852:g:g7QAAOSwFeNcZ2ur&frcectupt=true (https://www.ebay.com/itm/Boeing-747-400-Counter-Balance-Airborne-Avionics-Assembly-258T1190-8-Seviceable/372655695954?epid=8029147784&hash=item56c402a852:g:g7QAAOSwFeNcZ2ur&frcectupt=true)
Title: Re: Bernard...info
Post by: Trevor Hale on April 20, 2019, 09:46:31 AM
I think it makes to door Easy to open, it Counteracts the weight of the door, so the flight attendant can open it easily.
That's my guess anyway.

Title: Re: Bernard...info
Post by: blueskydriver on April 20, 2019, 11:23:19 AM
I need one of these to get out of bed each day! Just way too tired!!  :idiot:

John
Title: Re: Bernard...info
Post by: Garys on April 20, 2019, 12:12:02 PM
These are used on doors that open up vertically to the airframe, such as bulk cargo doors etc.( pax doors 767 as well )  Doors that open up parallel aren't affected by gravity so don't  need these big heavy items.
Title: Re: Bernard...info
Post by: FredK on April 20, 2019, 06:29:17 PM
Looks like home garage door technology.......a simple torsion spring with an adjustable tension feature added.

Fred K