Shielded electrical tool and ends
Mon Mar 14, 2011 2:48 pm
We are working with the wiring on a turret for our PB4Y2. Looking for information on the wire shielding ends and the tooling to install the ends. The wires we have have a crimped end of some sort that holds the shielding in place. Any thoughts? Thanks JOE
Re: Shielded electrical tool and ends
Mon Mar 14, 2011 10:21 pm
A bit more info please. Is the entire bundle shielded or just pairs of wires within that bundle? If the entire bundle is shielded it probably used an aeroquip sort of collar that threaded onto the end of the shielding at the threaded collar where the locking device screwed to the component. If it's simply a shielded pair in an otherwise standard bundle, it's fairly easy to do a solder sleeve for the shielding termination. shielding would be for preventing stray usually AC signals from 'leaking' into DC systems, or to eliminate possible shorting and arcing in areas prone to explosion or fire.
nothing you like to hear more from the Captain when launching than 'I'm hearing a buzzing in the cockpit speakers'.
What does your IPC show for that area? The IPC should also list p/n or assy #'s for the required parts.
nothing you like to hear more from the Captain when launching than 'I'm hearing a buzzing in the cockpit speakers'.
What does your IPC show for that area? The IPC should also list p/n or assy #'s for the required parts.
Re: Shielded electrical tool and ends
Mon Mar 14, 2011 10:32 pm
Hi,
Can you please send pictures? I did some work on a Martin 250 turret, might be able to help out.
Good luck with your project.
Bill
Can you please send pictures? I did some work on a Martin 250 turret, might be able to help out.
Good luck with your project.
Bill
Re: Shielded electrical tool and ends
Wed Mar 16, 2011 5:08 pm
Here is the link with one of the cables - Thank you so much for all your help Guys!!!!
http://public.fotki.com/Kos/members_pho ... g2340.html
Joe
http://public.fotki.com/Kos/members_pho ... g2340.html
Joe
Re: Shielded electrical tool and ends
Wed Mar 16, 2011 6:27 pm
OK, you've got what I suspected you would. That is really old skool shielding and I would hope that you can figure out the shielding tube lengths you need then start hitting the other restorers and suppliers who deal in NOS or obsolete parts. Aircraft breakers, companies who reside in 'Corrosion Corner' near Miami and deal in keeping old iron in shape to make money hauling boxes-
You may have a great challenge ahead of you, and, on the other hand you may hear from an individual who has 93 crates full of brand new, in the paper shielding tubes, sort of a crap shoot but you've come to the right place because there's always someone here who knows the guy who knows the guy who...........
You may have a great challenge ahead of you, and, on the other hand you may hear from an individual who has 93 crates full of brand new, in the paper shielding tubes, sort of a crap shoot but you've come to the right place because there's always someone here who knows the guy who knows the guy who...........
Re: Shielded electrical tool and ends
Wed Mar 16, 2011 9:13 pm
I believe there is someone who can make them.
Maybe Mark Denest can point you in the right direction.
Maybe Mark Denest can point you in the right direction.
Re: Shielded electrical tool and ends
Thu Mar 17, 2011 8:57 am
Rich, I don't know Mark, any contact info. Thanks JOE
Re: Shielded electrical tool and ends
Thu Mar 17, 2011 12:38 pm
51fixer wrote:I believe there is someone who can make them.
Maybe Mark Denest can point you in the right direction.
Pete Regina makes that stuff. Has all the tooling etc.
Re: Shielded electrical tool and ends
Wed Apr 13, 2011 2:33 pm
Joe,
Looks like simple flexible wiring conduit, commonly called Breezes. Most likely tin plated copper braid. More for physical protection than EMI shielding, although that would be an added benefit. You could send each conduit out and have a exact copy made, or send out the entire turret harness together. Harnesses and conduit are hard to get right the first time unless you have done it before, not to mention the expense of the tools required. A restoration shop would have these tools and expertise already and would get a bulk discount on conduit, plugs, wire, etc. http://www.airflexindustries.com/ has the conduit. An AIRCREWMAN'S GUNNERY MANUAL from 1944 would have a lot of info you need about operation of these turrets.
Are you planning on having the turret working? If not you could skip the associated wiring and just install the empty conduit for show. You might not want to run those turrets on the ground anyway. Although it would be quite the crowd pleaser, you would have the danger of hitting or pinching a spectator with the quickly spinning turret. Is this the Erco 250SH front turret? It had a self contained hydraulic system didn't it? If you got it to work, I suppose you could limit the speed somehow. I think the side turrets have hand cranks but the front and rear turrets had a hand operated emergency hydraulic pump to move the turret if the electric motor running the pump failed. You would have to run these on ground power or the little Homelite APU that these aircraft had, so you don't wear down the aircraft batteries. Amazingly there is a lot of info and manuals on these turrets still out there.
Good luck on the restoration and I'll be watching your progress.
Keep Em Flying,
Craig Hoaglund
Looks like simple flexible wiring conduit, commonly called Breezes. Most likely tin plated copper braid. More for physical protection than EMI shielding, although that would be an added benefit. You could send each conduit out and have a exact copy made, or send out the entire turret harness together. Harnesses and conduit are hard to get right the first time unless you have done it before, not to mention the expense of the tools required. A restoration shop would have these tools and expertise already and would get a bulk discount on conduit, plugs, wire, etc. http://www.airflexindustries.com/ has the conduit. An AIRCREWMAN'S GUNNERY MANUAL from 1944 would have a lot of info you need about operation of these turrets.
Are you planning on having the turret working? If not you could skip the associated wiring and just install the empty conduit for show. You might not want to run those turrets on the ground anyway. Although it would be quite the crowd pleaser, you would have the danger of hitting or pinching a spectator with the quickly spinning turret. Is this the Erco 250SH front turret? It had a self contained hydraulic system didn't it? If you got it to work, I suppose you could limit the speed somehow. I think the side turrets have hand cranks but the front and rear turrets had a hand operated emergency hydraulic pump to move the turret if the electric motor running the pump failed. You would have to run these on ground power or the little Homelite APU that these aircraft had, so you don't wear down the aircraft batteries. Amazingly there is a lot of info and manuals on these turrets still out there.
Good luck on the restoration and I'll be watching your progress.
Keep Em Flying,
Craig Hoaglund