You should also alternate the direction of your twists, so the first lock would be a right hand twist, the second lock should be a left hand twist, etc...
I don't think it was mentioned, but you're not supposed to untwist the wire if you go too far, this work hardens the wire...you're supposed to start all over. Also, the pigtail, when you loop it, should not touch the bolt because it may scratch the corrosion resistant coating and cause the wire and or bolt to corrode. The correct turns ration is 6-8 turns per inch for .032 wire, less for .040, a little more for .025 and .020. The size is determined by the hole in the bolt, taking up 75% of hole
Finally! A video on youtube showing not just one, but many ways to CORRECTLY safety/lock wire! Some other ones that I've seen (on an ultralight plane, no less) have been out right scary! Safety wire is used precisely as you demonstrated, not like a string o.o'
in aviation i was taught 6-8 per inch, but obviously depending on the thickness of wire it will vary. 8-10 being good for what you were using which looked like either .025 or .032. im trying to get my A&P and lock wire is hard for me cause im not vey nimble with my fingers and have trouble seeing my goal, sometimes just looks like spaghetti haha.
@Morkvonork Anything is possible. The most common thing I hear is that the pliers are so expensive. I'm trying to show that you don't need expensive tools, and then I just went that next step further. I couldn't resist.
@Morkvonork You do pull with about 20 lbs force, so that's why the vise is used here. Lockwiring small things is complicated by the need to pull on the wire.
Just curious, is there a rule of thumb for the direction of the lockwire? Seems like if its true that a bolt is "anchored" to its neighbor, it would also be true that a bolt could untorque its neighbor along with itself. Although they wouldn't all come fully out, it sounds like if you did it wrong, there could be a chain reaction untorquing multiple bolts!
@AgentJayZ Sorry, never done lockwire before, but I noticed that the lockwire had the twist going from the 6 o'clock position going to the 12 o'clock of the next bolt (from the view of the camera). Should the wire always follow that pattern?
My "loosening" comment referred to a wire in Right bolt with twists at 3 o'clock and then to Left bolt with twists at 12 o'clock. if the Left bolt loosens, it could pull the right bolt loose also, yes?
I'm not in the field that would use this technique so I have never seen lockwiring but I would have to say you did a good job of explaining. Cool! I can see how this would be handy in alot of situations.
@darkseed1010 Boss's daughter wrecked the engine in her car by ignoring the oil light. New engine was being installed at the time this video was made.
Wouldn't pushing a drill bit (the non sharp end) onto the fastener hole loop/bend the lockwire so you can pass the other strand without much difficulty?
@gushhnet Aah! you've just thought of one of the secrets I did not show.... very good! But I use a tiny flathead screwdriver, because it has less of a sharp end on it, and it has a handle.
The correct rate of twist is 6 to8 turns per inch. The reason is so that you do not work harden the wire. Work hardening any metal makes it more brittle. (This can be reversed by annealing.)
@TableAvocado well, that sounds a bit loose, and if it's correct, then every engine I've ever seen is too tight. Maybe they are. The manuals we use are from GE and RR, and they both specify 8 to 10 in their Standards and Practices sections.
I think we're splitting hairs here, But thanks for the input !
to 1:18 Is that a certain Massive Attack song I hear playing in the background? :D I forget the exact name since I've listened to almost all of their songs and I kind of lost track... :P
@oisiaa This video was shot with two cameras: Canon SD980is and SD1400is. They are primarily still cameras, but they do an amazing job as video cameras.
And their rechargable batteries last so long that battery life is never a concern on shoots.
I can't say enough about how much I like these little "digital Elphs"
Compared to the Iphone4, these little guys have much better image stabilization software.
With safety cable, depending on the actual s/c gun, it's sometimes far easier to use a long set of duckbills or needle nose against the tip of the gun to tighten up. Especially if the cutting die is wearing out. Frays in the cable at the swage are no bueno.
If I could make a request however, show some of the really fun ones. You know, those blind, overhead between the case and accessories kind of lockwires. ;-)
@SmokedTails I am planning another, pt 2, with more intricate and difficult wiring situations.
The Jet Tech series is not all that exciting for most viewers, but I'm trying to make real training videos that can be of use to those who are interested in how the work is actually done.
@AgentJayZ You are doing an absolutely wonderful job! I'm not a jet mechanic, but I am an aircrew member and seeing how our aircraft are maintained is fascinating. I just hope that our mechanics are as good as you.
@AgentJayZ I love the series. I was on the line at my last position, so I never got to tear into engines like you show. I've changed jobs recently and am now in a shop rebuilding motors. It's a whole different ball of wax, that's for sure. I am quite enjoying it and I think that watching your videos eased the transition from LRUs to wrenching the insides. Keep up the good work.
Full marks! --- BTW, got my DIY low tension igniter working, Woodward was kind enough to tell me I needed a creep path for the spark to follow. Thermosteel made a great creep path - I now have a glow-igniter-plug that fits in place of the igniter for easier starts.
Between blasting every blade, scrubbing every stator, the whole balancing process across 20 stages of blades. Torquing every fastener, lock wiring who knows how many bolts. I'm frightened to think about just how much time and work it takes to do a full overhaul. It's absolutely shocking. And Fastenating.
This is realy cool info,always wanted to learn how to work on Jet engines,when i inquired at a training school on Fla i was 30 at the time and they told me i was to old.Oh well typical America.Your this age you can't do this.
@koolbossjock There's no age restrictions in civilian training, as far as I know. When I was at BCIT, at the Vancouver airport, we had a guy in our class who was 51.
I have learn that at the school in 1 year....
With u, i need 20min :P Realy good vidéo!
spartan13014 3 weeks ago
thank you very much for an excellent video
blackwolfsquadron 3 weeks ago
You should also alternate the direction of your twists, so the first lock would be a right hand twist, the second lock should be a left hand twist, etc...
nothingmovesyou 1 month ago
I don't think it was mentioned, but you're not supposed to untwist the wire if you go too far, this work hardens the wire...you're supposed to start all over. Also, the pigtail, when you loop it, should not touch the bolt because it may scratch the corrosion resistant coating and cause the wire and or bolt to corrode. The correct turns ration is 6-8 turns per inch for .032 wire, less for .040, a little more for .025 and .020. The size is determined by the hole in the bolt, taking up 75% of hole
nothingmovesyou 1 month ago
Comment removed
nothingmovesyou 1 month ago
where was him when i was at school for amt
keith8465 1 month ago
Very informative. Thank you.
Lea71777 1 month ago
nice video. thanks!
mbcyclery 1 month ago
Finally! A video on youtube showing not just one, but many ways to CORRECTLY safety/lock wire! Some other ones that I've seen (on an ultralight plane, no less) have been out right scary! Safety wire is used precisely as you demonstrated, not like a string o.o'
lazystart 1 month ago
love the video. it should be used in technician schools. extremely detailed and everything! and i have to admit lockwire is a damn smart invention
DiamondPilotDan 2 months ago
in aviation i was taught 6-8 per inch, but obviously depending on the thickness of wire it will vary. 8-10 being good for what you were using which looked like either .025 or .032. im trying to get my A&P and lock wire is hard for me cause im not vey nimble with my fingers and have trouble seeing my goal, sometimes just looks like spaghetti haha.
lxDARK3VIL 2 months ago
Great Viedo~ Cool !!
Thanks your share. Hope you can made more viedo.
vf22c2w 3 months ago
what's the song at 1:17 - 1:19? Sounds familiar..
jcotteri 3 months ago
this is great. Thank you for sharing!
danf769 3 months ago
Great video. Thanks much for taking the time to do this. Very thorough and it was nice to see the different styles and your own favorites.
sfreskos 4 months ago
How probable is it to have the need to lockwire something but have no pliers at hand? :D
Morkvonork 6 months ago
@Morkvonork Anything is possible. The most common thing I hear is that the pliers are so expensive. I'm trying to show that you don't need expensive tools, and then I just went that next step further. I couldn't resist.
AgentJayZ 5 months ago
@AgentJayZ Do you pull hard on the wire while twisting it with the pliers?
TeifiValley123 5 months ago
@Morkvonork You do pull with about 20 lbs force, so that's why the vise is used here. Lockwiring small things is complicated by the need to pull on the wire.
AgentJayZ 5 months ago
Just curious, is there a rule of thumb for the direction of the lockwire? Seems like if its true that a bolt is "anchored" to its neighbor, it would also be true that a bolt could untorque its neighbor along with itself. Although they wouldn't all come fully out, it sounds like if you did it wrong, there could be a chain reaction untorquing multiple bolts!
wbhartmanii 7 months ago
@wbhartmanii what... ?
AgentJayZ 7 months ago
@AgentJayZ Sorry, never done lockwire before, but I noticed that the lockwire had the twist going from the 6 o'clock position going to the 12 o'clock of the next bolt (from the view of the camera). Should the wire always follow that pattern?
My "loosening" comment referred to a wire in Right bolt with twists at 3 o'clock and then to Left bolt with twists at 12 o'clock. if the Left bolt loosens, it could pull the right bolt loose also, yes?
Any tricks to avoid that or just careful eyes?
wbhartmanii 7 months ago
@wbhartmanii No... the lockwire will always be pulled tighter if a bolt starts to come undone.
Right bolt three under and left bolt twelve over is just such a situation.
AgentJayZ 6 months ago
I'm not in the field that would use this technique so I have never seen lockwiring but I would have to say you did a good job of explaining. Cool! I can see how this would be handy in alot of situations.
yurkia360 7 months ago
Have you guys ever looked into Safe-T-Cable from DMCTools? It will save you TONS of time!
Check out our Youtube Channel.
DMCTOOLS 7 months ago
@DMCTOOLS I think I show in this video how much faster safety cable is...
I'm not trying to convince anybody that one way is better than the other, this is just a video about how to use lockwire.
Loan me one of your kits for a month, and I'll be happy to make an evaluation video...
AgentJayZ 7 months ago
Very good video! You should put a locking washer, green lock tight, and locking wire! Just a out of left field question. Why is the car in the shop?
darkseed1010 8 months ago
@darkseed1010 Boss's daughter wrecked the engine in her car by ignoring the oil light. New engine was being installed at the time this video was made.
AgentJayZ 8 months ago
i didnt realize this was 22 minutes till it was over lol
womackke 10 months ago
@womackke Hope you liked it !
AgentJayZ 10 months ago
Wouldn't pushing a drill bit (the non sharp end) onto the fastener hole loop/bend the lockwire so you can pass the other strand without much difficulty?
gushhnet 10 months ago
@gushhnet Aah! you've just thought of one of the secrets I did not show.... very good! But I use a tiny flathead screwdriver, because it has less of a sharp end on it, and it has a handle.
AgentJayZ 10 months ago
Ive applied for an apprenticeship with GE aviation, and im pretty sure i have to bend some of this stuff in some practical tests! Awesome vid!
thspamed 11 months ago
The correct rate of twist is 6 to8 turns per inch. The reason is so that you do not work harden the wire. Work hardening any metal makes it more brittle. (This can be reversed by annealing.)
Reference:
FAA AC 43.13-1B Figure 7.3a
TableAvocado 11 months ago
@TableAvocado well, that sounds a bit loose, and if it's correct, then every engine I've ever seen is too tight. Maybe they are. The manuals we use are from GE and RR, and they both specify 8 to 10 in their Standards and Practices sections.
I think we're splitting hairs here, But thanks for the input !
AgentJayZ 11 months ago
And more Massive Attack at the end!
Wonderful tutorial!
TeslaWasHere 11 months ago
1:05
to 1:18 Is that a certain Massive Attack song I hear playing in the background? :D I forget the exact name since I've listened to almost all of their songs and I kind of lost track... :P
TeslaWasHere 11 months ago
@TeslaWasHere For Youtube's copyright reasons... I can't say I hear anything but faint sounds in the background.
I agree with you that it sounds great, but it just happened to be playing on my favorite station.
AgentJayZ 11 months ago
This is great. Thanks. Looking forward to PT 2 and more.
AJP51153 11 months ago
awesome as always, thanks
DavoCitizen 1 year ago
Really interesting stuff to know...I had no idea there is so much of that being done.
No wonder an engine rebuild or over-haul takes a lot of hours.
You're making apprentices of some of us here...lol
I think that lockwire must be made from a well-tested alloy,to make it strong enough,yet soft and plyable....before the work-hardening sets in.
MusicMan20061210 1 year ago
Nice one Jay. Thanks.
1950sleds 1 year ago
What camera are you using?
oisiaa 1 year ago
@oisiaa This video was shot with two cameras: Canon SD980is and SD1400is. They are primarily still cameras, but they do an amazing job as video cameras.
And their rechargable batteries last so long that battery life is never a concern on shoots.
I can't say enough about how much I like these little "digital Elphs"
Compared to the Iphone4, these little guys have much better image stabilization software.
They can do 720p HD video... how does it look?
AgentJayZ 1 year ago
@AgentJayZ I think the 720p looks quite nice. I'm surprised that it comes from such a small camera.
oisiaa 1 year ago
@oisiaa Only thing better would be a professional camera, at ten times the price.
AgentJayZ 1 year ago
You remind me of a surgeon performing an operation! Great video!
oisiaa 1 year ago
A definate art that takes time and patients.
bashue69 1 year ago
really really interesting! thanks very much for sharing it! another wonderful detail of your amazing job ;-)
WolfenGeist 1 year ago
With safety cable, depending on the actual s/c gun, it's sometimes far easier to use a long set of duckbills or needle nose against the tip of the gun to tighten up. Especially if the cutting die is wearing out. Frays in the cable at the swage are no bueno.
If I could make a request however, show some of the really fun ones. You know, those blind, overhead between the case and accessories kind of lockwires. ;-)
SmokedTails 1 year ago 2
@SmokedTails I am planning another, pt 2, with more intricate and difficult wiring situations.
The Jet Tech series is not all that exciting for most viewers, but I'm trying to make real training videos that can be of use to those who are interested in how the work is actually done.
How am I doing?
AgentJayZ 1 year ago
@AgentJayZ You are doing an absolutely wonderful job! I'm not a jet mechanic, but I am an aircrew member and seeing how our aircraft are maintained is fascinating. I just hope that our mechanics are as good as you.
oisiaa 1 year ago
@oisiaa ... aircraft engine mechanics are at least as good as this. Everything they do is inspected and recorded.
How good would anybody be if there was always someone looking over their shoulder, checking off boxes ?
Aircraft very rarely have a mechanical problem with the engines.
What's your experience ?
AgentJayZ 1 year ago
@AgentJayZ 2800 hours in the US Air Force flying KC-135s. I'm sure our guys do a great job too.
oisiaa 1 year ago
@oisiaa Are you one of those boom pilots who do everything backwards and upside down in real time ?
That's gotta be one of the toughest jobs there are.
AgentJayZ 1 year ago
@AgentJayZ I love the series. I was on the line at my last position, so I never got to tear into engines like you show. I've changed jobs recently and am now in a shop rebuilding motors. It's a whole different ball of wax, that's for sure. I am quite enjoying it and I think that watching your videos eased the transition from LRUs to wrenching the insides. Keep up the good work.
SmokedTails 1 year ago
fascinating
ASSEMblerEX 1 year ago
Full marks! --- BTW, got my DIY low tension igniter working, Woodward was kind enough to tell me I needed a creep path for the spark to follow. Thermosteel made a great creep path - I now have a glow-igniter-plug that fits in place of the igniter for easier starts.
-larry,
LarryCanFly 1 year ago
Between blasting every blade, scrubbing every stator, the whole balancing process across 20 stages of blades. Torquing every fastener, lock wiring who knows how many bolts. I'm frightened to think about just how much time and work it takes to do a full overhaul. It's absolutely shocking. And Fastenating.
Fierobsessed 1 year ago
@Fierobsessed It sure shows how jet engines, once fully overhauled are pretty much one peace.
Helicopterpilot16 1 year ago
This is realy cool info,always wanted to learn how to work on Jet engines,when i inquired at a training school on Fla i was 30 at the time and they told me i was to old.Oh well typical America.Your this age you can't do this.
koolbossjock 1 year ago
@koolbossjock There's no age restrictions in civilian training, as far as I know. When I was at BCIT, at the Vancouver airport, we had a guy in our class who was 51.
AgentJayZ 1 year ago
@AgentJayZ Realy!! Damn where do i enlist.
koolbossjock 1 year ago
@koolbossjock
BCIT.ca homepage ... search for gas turbine, and it's the first hit
AgentJayZ 1 year ago
@AgentJayZ Cool..Thanks,will check it out.
koolbossjock 1 year ago