waffleman95 already bought one? 😉

As am i

Same man

same

@@erebostd Not yet. I don't have any need for it. But maybe one day.

Correct, a inspector will not accept if not done properly.

When I was in school for my AP, they said it was wrong for us to have ANY slack, so all of our safety wire (in class) was made very very tight. :)

@@user-zm1vt3rf9b There is a difference from being taut and tight. Reference AC 43.13-1B Ch 7 paragraph 7-124. SAFETY-WIRING PROCEDURES. e. Safety wire must never be overstressed. Safety wire will break under vibrations if twisted too tightly. Safety wire must be pulled taut when being twisted, and maintain a light tension when secured. (See figure 7-3a.) As a DME safety wire is a basic skill and on all oral and practical tests. If you over tighten the wire on a practical test project it is incorrect and will be considered a failed project. The keyword is “taut.”

@@user-zm1vt3rf9b I have an A&P blog for all FAA applicants on Facebook that is open to anyone to help them prepare for the O&P tests at facebook.com/StacheAir/?ref=bookmarks

If it’s too loose. Just listen one of the bolts. That’ll make the wire right. Lol

Makes me hopeful for my future

Aye, I’m working on getting my A&P too

Hey are you still in school for a&p

Just finished my Airframe program and preparing for my O&P

We recently posted 2 more video, check out the channel.

currently a mechanic helper and all we work on is 1900. Learned to love doing the prop safeties !

@@SharkyK6 same as well as other aircrafts we have, safeties so much, it’s a piece of cake now

The saftey wire needs to cover 70 to 80 per cent of the diameter of the bolt hole, that's the choice about .032 or .041 wire and the 7 turns per inch, I have seen alot of unairworthy saftey wire on propellers

Thanks for the comment. The objective of safety wiring is to prevent the bolt/nut from loosening. You will note that when wiring the first bolt, there is an slight angle maintaining tension on the bolt as it leads to the second bolt. This tension prevents both bolts from loosening. Were this a wood prop, subject to swelling and shrinkage, this method prevents the bolts from turning when the wood shrinks. BTW, wood props must be re-torqued and safetied every 50 hours or as the manufacturer specifies.

Jordan Stephens - we never get a straight on view to really tell if it is a neutral safety but it's pretty close. If I'm assembling something and end up with a bolt with the safety wire in this position I'll swap a couple of the bolts to avoid the neutral position (and the stink eye from my TI). He could have came from the "back side" of the hole but that can end up being loose around the bolt. Also, if the twisted pair touches the single wire going into the near side hole my TI wouldn't buy it.

I'm working on my A&P and I'm currently in the usaf we go by 8 to 10 twist an inch ! Is that a serious thing or?

Jennifer Rice I have never had anyone count twists per inch or any of that nonsense. Real time, this is about a 45 second safety wire job

@@jenniferrice5098 It actually depends on the wire's thickness. If the wire measure from 0.019 to 0.026 it takes from 9 to 12 twist (per inch distance). If it measure 0.027 to 0.042, its 7 to 10 twist. The more the wire is thick the less you need to twist.

i'll sell you one for $60

Maybe you just want a really secure ring gear on your car's differential.

LOL...I don't own a plane either and found the video very informative.

Do you have to be a spy to watch a James Bond movie? Do you have to be an X-Men to watch an X-Men movie? Etc.

Blyat

Blinn

Please use american tools only,but your Twister pliers si Made CHINA,,,,,,

One thing that helps is to yank and "snap" it a few times. Particularly good for helping the wire conform to the shape of the bolts.

​@@davecrupel2817learned that one from my old man, flick of the wrist 🤙🏽

John. I don't see any reason why it wouldn't work in your application. Depending on the size of the bolt, use at least .032" safety wire due to centrifugal forces. A.J.

What A.J. said. Nothing smaller. And not too tight, cause of heavy vibrations.

could unbalance the flywheel and cause vibration....no need for it anyway

Wire sizing. At least 2/3 diameter of bolt hole.

Locktite

Ever been on a plane. Boom, exhibit a. Nothing happened or fell off. 👍 Job wel done.

Yes he is!

Thanks Danny. Yes, I am an USAF vet, 63-67, but I was a Cartographic Analyst. Didn't learn to safety wire until I went to A&P school in mid-life. Practice makes perfect.

@@a.j.pawlowski156 I'd probably never have to do any safety wires in my life, yet I still watched it out of interest, thank you for this video.

@@a.j.pawlowski156 I'm in A&P school now and this video has helped me immensely. Thank you, sir!

i get what your saying myself, but i personally have never seen what your suggesting, it has always been a very sharp angle coming right out of the hole, however I have never seen safety wire break on such a location, and i work with safety wire almost daily.

What’s the AWG equivalent?

Non kzfaq.info/get/bejne/f7Gnithj3JfLd58.html

Can you elaborate?

Visually

After

Too bad, no answer to my questions

In school we covered this I believe it’s at least one thread minimum should protrude

@@joecompanion1237 This seems to be the logical answer although this comes mostly from the fiber lock or nylock nuts. AN Bolts do not have enough threads. I have been given a lead on a propeller specific supplier but have not had time to pursue this. I will get it done.

Rowdyflyer, the answer is, look in the manual!

@@peteclark7662 If the answer was in the library of manuals which I own, don’t you believe if I had found the answer there, that I would be seeking the answer here? Please do not insult the efforts of those seeking knowledge from those who might know. I know what I must do but the path I am taking is from common sense rather that the answer spelled out in a mythical manual. I expect this problem is more common than we expect and propellers are being attached , torqued and safety wire by a proper grip of AN bolts with threads not protruding the flange which is safe but illegal. I am not willing to have my build rejected on the day of inspection by a DAR or the FAA, who may or may not know the actual requirement.

James Robinson yes...in some instances it’s the only way some things can be safetied

Ferrule, not feral.

@@shawbros A yes or no would have been fine! I didn't sign up for a spelling class.

@@justing42 40 years ago safety wire, was all that was available.

@@jamesrobinson5672 "Feral" refers to a wild animal.

You mean castle nut?

The hub has the threads, thus the bolts go through prob into the hub.

I believe studs and nuts would be stronger but also double the parts involved and another Failure point

It is wired in a way to prevent a bolt from loosening, thanks for looking.

The easiest and cheapest way is to make one. Grab a handful of bolts with safety wire holes and put them through a piece of wood or metal and tighten them down. Then safety wire away.

It's so close to the center of rotation and so light weight it would have little to no effect on balancing.

Daniel Cannata yes sir, Prop bolts must be safety wired with .041 safety wire

Thanks for the good catch. You have a good point, however AC 43-13-1B, 7-125. TWISTING WITH SPECIAL TOOLS. Twist the wire with a wire twister as follows. (See figure 7-4.) CAUTION: When using wire twisters, and the wire extends 3 inches beyond the jaws of the twisters, loosely wrap the wire around the pliers to prevent whipping and possible personal injury. Excessive twisting of the wire will weaken the wire. a. Grip the wire in the jaws of the wire twister and slide the outer sleeve down with your thumb to lock the handles or lock the spring-loaded pin. b. Pull the knob, and the spiral rod spins and twists the wire. c. Squeeze handles together to release wire. There is no mention within section 7-125 pertaining to tool marks on the wire. In my experience, the minor tool marks created by the safetywire twister do not affect the integrity of the safety wire. Thanks for watching and especially thanks for asking the question. a.j.

Ian Cunningham yea a TI would cut out lockwire if there are marks on it. Not sure what the exact TM,AR,or Da-Pam is for lock wire but any nick in the wire is a no go. But that's army aviation

Nobody in the real world cares or examines safety wire for nicks.

Cotter pins are for things like the throttle shaft bolt and the clevasses on a fuel servo.

So, the first reason for that is the level of vibration (acceleration and amplitude). It is much more higher than existed in automotives. The second one is criticallity of joints. A lot of joints and connections aboard are safe-life. In other words - you might have a huge problem in case of disconnection, probably with catastrophic result. As you understand, there is no chance to take a stop midair to check if all goes well..

B2 Instructor ahhhhhhhhhhh makes sense now thanks a lot

B2 Instructor well I’m automotive we too use safety wires but more like high performance racing engines because of the amount of vibration on exhaust bolts or nut or certain area like rear differential cover but it’s good to know that these safety are made for us humans from panicking

@@taylorseng9918 if you interested about high performance jet engine, check this channel kzfaq.info. This guy knows all about it. By the way it is another video about safety wire on this channel.

Theoretically yes but that would be pretty hard with thick gauge wire

@@javajav3004 and it would not symmetrical- and cause an out of balance condition.

Yes, in theory you could lock them with one piece of wire but, if the AMM (Aircraft Maintenance Manual) tells you to lock them in pairs then that's what you do!

@@peteclark7662 oh if thats according to AMM then you should. I thought its a standard practice.

Thank you for your input.

Al Hodge you’re lockwiring because if one bolt tries to loosen it will be tightening the bolt it is wired to, therefore lockwiring when done correctly prevents bolts from loosening during the vibration stresses an aircraft faces during flight.

Cotter pins are used on nuts not bolt heads.

p1epoppa they do use then on some places buy you never just rely on torque alone the safety wire is to hold the bolts in there holes so any that do work lose can be corrected at the next 100 hour inspection without getting lost or faking into something they shouldn't

Good point, will do so in the future!

Yep

www.aircraftspruce.com/catalog/topages/wireTwister1.php?clickkey=3009235

A.J. Pawlowski thanks. decent price too! wonder if I can get them in the UK

I would think that Safety Wire Pliers should be available at most industrial tool supply houses in the UK. Aircraft Spruce may be able to ship.

Ac 43.13 1b- 2b

its marked on the container the wire comes in. unless you measure it with a micrometer, you have to trust the manufacturer.

These are usually drilled from the factory and have a tiny, tiny chamfer on them. I would completely disagree with it being too tight, if anything it looks slightly loose, the requirements say it should be taught and that looks like it will wobble a fair amount.