Radio Controlled CLEVIS & BALL JOINT Testing - Testing to failure
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- เผยแพร่เมื่อ 6 ต.ค. 2024
- #torturetest #clevis #balljoint This video idea came from your questions! Thanks for watching and commenting. I was not able to find failure numbers published for some of our common Clevis' and ball joints used in the Radio Controlled RC Airplane, car, boat and all things RC world. Hence the reason for the testing. We test to failure Dubro Heavy Duty ball links in small and big size. The classic Sullivan Golden Clevis in 4-40 size and 5-56. Also metric clevis' from CARF and Aviation Design as well as some no name/unknown origin ones. Thanks Ward for Helping me with the testing and putting this video together!
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Can't for the life of me understand why this channel hasn't got more subscribers....definitely one of the best RC channels on TH-cam.
I appreciate that!
I'll copy u on that....awesome content, fantastic presentation......and a amazing amount of knowledge and tips that are past on to us... ☺👉
I found this by accident however I’ve been waiting for someone to do this. I actually tested the same things in our testing lab almost exactly as you di but with very accurate lab loading and measuring. The results were close to yours as was my own conclusion. I don’t think I ever had a Clevice or ball link failure in flight of any of my big warbirds but I had a pretty good idea of the loads placed on them. Clevises and ball links are used on full sized race cars but these have been tested and certifications are used all all the time. Your safety washer idea is standard procedure on the race cars and a good idea.
I shared this nice video with my young son who is just getting into giant scale modeling. I did structural engineering for my engineering career so it was a way of life for me. I’ve been retired for a number of years but still eat live and sleep this stuff. I even keep a note pad by my bed for middle of the night insights.
Keep up the good work. I’ll try and follow you.
Byron nelson.
Cool Byron! Thanks for the info in your comment! I enjoy putting these type of videos together! Thanks for watching! Will be doing some compression destruction testing soon.
This was a fun video to put together! Thanks for watching! if you have any questions or comments list them below
what about alloy ball links and adjustable ball links
Now this video was educational! Never assumed the clevis would be stronger! Can u do one more with metal ball joints?
Thanks Sachin! Glad you enjoyed it. Based on the Response and additional suggestions I think there will be 1 or 2 more of these testings for various ball joints.
and...
Congrats for amazing channel, with really interesting content and issues.
Really brainy content!
Cheers from Sao Paulo, Brazil
Thank you very much!😎
Posted your video to "Hobby Squawk". Great information. Best and Merry Christmas.
Thanks Stephen! Merry Christmas to you!😊
put your Palm behind the parts to assist AutoFocus of the camera. 6:38
it's like Projet Farm but with RC stuffs.. loved it
9:27 felt so dangerous... hope he is well...
Perfect! Thanks for the tip on the focus!😎
Thanks for watching!
great review keep them coming
Thanks!
That was worth it to watch the expressions etc when they let go
Haha 😂. Thanks 😊
Also what words said when your helper squashed his fingers on the last 1 or 2nd last 1 I bet rude
@@robert43g haha! Yea. Cut that clip short 😂
Great project, well done ! It’s the threads that are rubbish in cheap ones
Thanks! Keep an eye out for round #2!
VERY revealing test - thanks for posting!
You bet! Thanks for watching!
👍😎
Fantastic test!
The results speak for themselves!
Stress test of standard servos (like Hitec, JR, JX, Futaba, Tactic, Blue Bird, Savox), will be nice!
Thanks!
Thanks for the idea! and thanks for watching!
Some of these were much stronger than I would have thought. Good Info! Honestly though, the best part was how surprised both of you looked when one broke. : )
Haha. My wife and kids all came out into the garage as they thought the house was going to fall down after the first one went BOOM!
Wow so happy I come across this channel. I'm putting together a xcalibur midsize turbine at the moment, and most people are saying the the clevis they use in the kit are not that great and are converting over to ball links. Just go's to show that people may think there doing the right thing but are they really? Great video mate liked and subbed just for being si good.
Welcome aboard! Thanks for watching, subbing and finding the channel!
Now this puts my mind at ease using the metric clevis's on the Viper, amazing the difference in failure points. Good Video Jonathan
Thanks 👍
Excellent video. I honestly don't think I've ever seen this done before? Bottom line is its nice to know that these little connectors can take far more load than they are ever going to see. What do you think would happen if you hung that rig from even the strongest servos we use for this size model with a one inch arm? Love the videos and detailed build processes! Thank you!
Thanks Jay! Yea, all of these options will work just fine for what we use it for. Honestly I think that even the strongest servos on 8V or even 12V servos would struggle to hold 180+ lbs!
Excellent video and tests. I always thought the ball joints were stronger. Well, was I wrong. Thanks.
HAHA. I think for our applications all of the options work perfect! They all provide sufficient strength.
@@thelightersideofrc Yes.
Never thought the clevis would be stronger! Great test and video!
Me neither! I think most think of the Clevis as a lower quality option. all are good but there is a clear strength winner.
Also, I have had ball links that have stayed strong even after a crash...
Yea Totally.
Thank you for doing this. I'm very curious to know how the aluminium version of ball links hold out...
Thanks Kim. I think the aluminum balls would fail on the mounting bolt first. At least the smaller ones with 2mm screw would. The larger ones I couldn’t guess where the failure point would be.
@@thelightersideofrc I think you're probably right, although I also worry about the ball snapping out of its housing.
Great video. Thanks!
Glad you liked it!😎
That was great info, thank you John for all the work putting that together. Told my Rc buddies to check out your video!
Awesome thank you! I appreciate that Kelly!
thank you so much for doing this.
My pleasure! Thanks for watching!
Very interesting test , thanks you
Thank you!
Hey Johnathan As the test progressed the lower you jumped LOL Excellent video Keith
HAHA. Yea still jumping at the end but a little less shocking!
Lol. Truth! Thanks Keith!
Awesome thanks for the info.
You bet!😎😊
a really great test and information!!!! Building 3 large planes at the moment, really helpful!!! Thank you very much!!!
Glad it was helpful! Thanks for watching!
Great info. Loved the reactions and the slow motion.
HAHA! Thanks😊😀
The advantage of the ball joint is they can compensate for a rod that's running at a slight angle. On my Avro Vulcan I have clevices at the servo end and ball joints at the moving surface, that way you don't get any binding up.
Great way to do it! Same setup on my CARF Ultra Flash. I think the results of this video show that any option will work just fine!
Excellent......that really was awesome! I have always wondered and pondered on the strength differences.....now i know...thanks to you. :) Greetings all the way from sunny 'Cape Town'.
Glad it was helpful! Thanks for watching!
Really interesting video Johnathon. It would be interesting to see some sort of longer-term durability test. I would imagine that failure in an aircraft would rarely be from a max load, but rather from repetitive movements, or the clevis somehow coming apart or loose over time... the servos or control surface would surely fail long before you got to the kind of load you were applying to the clevis. Still, If the clevis holds up to that kind of load, it is a good sign it would hold up to many many repetitive smaller loads... Thanks again for an interesting video!
Thanks Ted. Yea I think that any of these options shown in the video would work on any plane/jet. I think flutter of a surface because of loose joints or just dumb thumbs is way more likely!
Great info, I was really surprised at the ball links compared to the clevis, but what is the actual force exerted in flight, maybe the high weight is overkill, maybe the lower weight though much less then the clevis is sufficient.
Really when it comes down to it all of these options are more than sufficient for what we need.
Wow! .......and here I have been a ball joint guy all these years.....!
HAHA. I think all options work great for our needs in the end but nice to know the differences!
Fantastic Video! I can't believe I haven't seen this testing before!
Thank you!😊
Great video and great info my question would be “if using very high torque servos as some manufactures recommend are all the connections really able to take all that torque?”
I think we would never see forces like this with regular flight Pete.
Would like to see how ball joints from Intairco compare...great video though!
Great suggestion!
Thanks! I think there will be a second and maybe 3 rd version of this video based on the response
@@thelightersideofrc look forward to them :-)
Nice video. Why didn’t you test with aluminium ball links ?
Just tested what I had. I think there will be another video coming based on the response and suggestions.
@@thelightersideofrc Thanks ! You won a new subscriber 👏
How about testing captive ball links?
Thanks Jon! I’ll add it to the list!
do you happen to know the length of the dubro HD ball links?
I just measured my metric and imperial and they come out to 26.5mm
People seems to over do everything, most of these will work on any project, some are just better for certain projects
I personally like the Dubro HD ball ends, easier to install and with give the least amount of slop in those flutter prone jets.
Not to mention getting the proper size hole for the clevis that doesnt cause slop is tough.
I need to dig up my wire heat protection testing I did
Yea totally Keith! what this really shows is all of these options will work just fine for our applications and pick the one that works best for your specific plane or application.
Numerical drill set, you can find the correct diameter.
That’s a lot of torture
Yea! That's alot of weight!
Great video Jonathan!! I have a drawer full of no-name 3mm clevises that I have got from some jet kits. I replaced many of them with the 4-40 Golden clevises because of the poor threading. I do however, have many jets with some ball links............now I am nervous. LOL!! Funny that you should do this test as I had just recently discovered a cracked all METAL 4mm ball link in the elevator on my Scorpion during a winter preventative maintenance checkup. These are much larger and robust than the plastic Dubro units. It did not fail, but the link was getting sloppy. I have ordered more all METAL ball links that are used for 1/8 car alignment rods, but maybe I should use them more often instead of the plastic ones. Thanks for the information!!
Thanks for watching Brent! it was fun doing this test. It made me realize that pretty much any of these options will work just fine for our applications!
I rarely trust the clevices in an ARF or RTF for the model they came with.
Test some from the common foam RTF/PNF models such as Dynam's appx 1250 mm wingspan warbirds.
Pushing matters too because some are weaker in push than pull. Your very short pushrod would essentially eliminate the pushrod as the fail point.
Yea i think all the options will ultimatley work for any of our applications as long as they are used correctly.
Do you think the heavy duty dubro ball links will be a little stronger with a double control horn . Im scared now i use these😂
They failed because the plastic stretched. Double adds nice support to eliminate side forces on the horn and also eliminates the chance of the ball pulling out.
With regards to failure because the plastic stretches on the aircraft, I don’t think any normal plane would ever have that much force on the surface
@@thelightersideofrc great thanks for the reply i feel better now
😎
Would have been interesting to see where the Sullivan failed without the retainer clip. Those clips are easy to loose and I’ve seen people say fuckit and go fly anyways without which they are not designed to do.
Great Idea! I feel a 2nd version of this video coming.
Next video Jon say me hello ruben at the video !
HAHA. I'll try to remember.
I like Yr test method, don't no y people question, as Yr getting 170,to 190 on the pull which is mostly down surface,? On the push which is up will excerpt far more force limits,,, doesn't matter which plastics ball fail, and people put faith, in your quote( old school,) wins my jets, as your method, 👌
Thanks Andrew!😎
What you fail.to mention is that clevices, while supporting more weight, are more likely to fail than ball links at two placesthe rod thread where they split, AND the pin can AND WILL enlarge the hole in the control horn leading to flutter. I think you tested well, but as we all know, lab tests dont always reflect real world. I have have so many crevices fail on me that I have replaced even my glow setups with ball links. Going on 10 years now, not one ball link failure on everything up to 40% 3D monsters. Interesting video though.
Hey Mike. Totally agree with everything you said. This test was purely to test the failure point. What this test really showed was every single one of these options would be sufficient for our RC toys. Yes, some will last longer and be more problem free than others.
@@thelightersideofrc yeah, dynamic vs static is always intriguing. Me, tho, I'll take the security of nut and bolt over pin and clip any day. This vid actually sparked an interesting debate amongst our club members!
Haha. That’s good to hear. It can be quite a hot topic! It’s almost as passionate as a spektrum vs Futaba vs JR discussion 😂