008: SIMPLE CONNECTION FOR AIRCRAFT TRIM WIRES

Simple connection for the standard Elevator, Aileron and/or Rudder trim when using the multi conductor aircraft wire (tefzel/teflon) for your trim servos without having to install an entire connector. This demonstration is for standard Experimental Aircraft and this may not be an acceptable procedure on your certificated aircraft.
Our Part Numbers for items referenced in this video:
Female dsub sockets: SA-1017
Male dsub pins: SA-1018
Heat shrink kit: HSKIT (or 1/16" heat shrink [SA-700B, SA-700C] and 1/4" clear HS [SA-704C] )
9 pin female dsub connector with lugs: SA-DB9FN
9 pin male dsub connector: SA-1011
Dsub backshells: ES-9

[@ianxbrown]

This is perfect Stein. Just what I was looking for for my nicked trim tab wire.

[@discofishing]

This is a good idea when you don't have hard or soft splices or solder splices. I would recommend a shielded sleeve over the spliced area. You can use braided shielding and slide it over the splices area and use a shield terminator on both ends for good electrical coupling. I've seen EMI shielded sleeves that don't have the shield braid but rather a sliver paint on the inside for shielding.

[@SteinAir]

Good tip!

[@charosenz]

excellent!!! credit to Bob N too. Super

[@mgdurandolo]

Great idea!! Thanks

[@williamc5369]

What size was the clear heat shrink? Very nice video. Ran across this just as I'm ready to wire my elevator trim servo. Thanks!

[@benlane3701]

Not a bad idea. But connection technologies have moved on since the humble D - Sub connector. I'd suggest to anyone in this sort of space sensitive situation, that you have a look at the Amphenol Luminus range of connectors. They're not the cheapest things on the planet. Bit use the proper MS39029 spec crimp contacts. But above all else have a very very small physical footprint. And don't require bulky backshells ect. Disclaimer - I Do not work for amphenol. Just thought I'd pass this on.

[@serferchef]

super nice video thankx!!!

[@kacykacem]

Great work! but I have never seen this procedure in my entire 20 years an Avionics Tech, can you point a reference to this, AC43-13 or any other standard wiring practices manual. Thanks

[@SteinAir]

Like many things in aviation maintenance, you won't find the best tricks, hints, experience, instruction, or many other tips published. As you are obviously aware the "AC" is strictly an advisory document created some 40-60 years ago, and practices manuals are just that...manuals. There are a lot of neat methods to accomplish things in the world that aren't necessarily published. Cheers!

[@kacykacem]

Agreed! Thanks

[@Ashampoo2k6]

Awesome Videos. Where would i found out about certified connections ?

[@youtubechannel231df]

Лайк!

[@Quoper1]

Have you noticed any bleeding with the thin heat shrink between each pin connection?

[@SteinAir]

I'm sure if these were carrying high current, audio, or other loads you might, but given the extremely small voltage and low current it's unlikely you'd ever see an issue....

[@tdmmcl1532]

this would NEVER FLY in ANY connection to ANY circuit that provide critical flight safety (flight control trim...hello!). the proper way, the correct way, the minimum way is a connector. And if you don't have the space for a connector, then you run the wire end to end from point a to point b. period...end of story. this is teaching terrible practices. the heat shrink is not a mechanical fastening of the pins and sockets. This is stupid and this would never pass inspection for any FAA regulated repair or service center. maybe this is how you do it in general aviation, or experimental, but this is just plain wrong, no matter what. THE ONLY WAY I COULD SEE ANYONE ACTUALLY DOING THIS WOULD BE FOR SOME A NON ESSENTIAL CIRCUIT OF LOW VOLTAGE AND LOW CURRENT, LIKE A USB SOCKET FOR CHARGING NON ESSENTIAL EQUIPMENT. put a connector in your circuits appropriate for the wire and function of the load. Period. If the reason for the connector is to provide a disconnect segment, use one. period. If you don't have the skills or the space to install a connector, then just run the wire from source to load continuously, with no splices. this video should be taken down by steinAir. This is not representative of good standard safe practices.