10 Ways to Minimize Torque Twist

Torque twist can make the body and chassis tilt to the left or right side. Compared to static torque twist, that occurs during slow phases of movements, dynamic torque twist arises only during the short phases of accelerations. This video explains, how dynamic torque twist can be expressed by a simplified mathematical model. The model is then used to show how torque twist can be minimized.
Related movies:
About acceleration in driving direction: • DRIVE TRAIN insights a...
About spring stiffness: studio.kzbin.infouPAi...
About sideward tilting: studio.kzbin.info-Ghq...
About articulation, suspension travel: • How to Increase the Fl...
Footage about cars showing dynamic torque twist was kindly provided by "Nycosp" and "lordofbasement":
• Vaterra Ascender No To...
• Traxxas TRX-4 & Axial ...
Music:
Aboombong - Drag along behind (license-free from FMA)

[@jameswinston5369]

I got the gist within first 60 seconds of the video after wading through a ton of info. Seriously well explained.

[@rcscientific6004]

Thanks a lot!

[@KAG-tn2mi]

Wow, I tried explaining this at hobby shop, they gave me a kite for free to leave the premises. 😆

[@samloveelvis]

Omg, makes so much sense! I noticed stiffer springs and running forced full droop help a lot with torque twist

[@Dowan_Gim]

Thank you for the video.

[@SevenWelt]

Very cool video!👍

[@mtzl1930]

Excellent!

[@MikeRCWorld]

great info 👍

[@SlavaRC]

Thanks for video my friend, excellent work!)🥰🤩💥💯👍👏

[@rcscientific6004]

Thank you for watching and liking!

[@tructruc00]

What job are you doing to know all of that man it's incredible, a love yours videos !! 😍

[@rcscientific6004]

Hi! Thanks for your kind comment. I am a professor in robotics. But this here is only my hobby. I love not only maths and physics, but also crawling and scaling the RC car models.

[@rcyans7184]

Keren sekali

[@RC-qv4sg]

You're a genius!

[@victorma1141]

we will have an all new 2 speed gear box for FCX 10 RTR RC can balancing the Torque Twist.

[@HL-OOI]

That’s why touring car use belt..

[@blowback8852]

On the issue of Dynamic Torque Twist. Can we presume that decreasing the motor torque by installing a low torque motor OR increasing the size/teeth of the motor pinion decreases the reaction torque? -thanks in advance Professor

[@demoths]

My explanation: driveshaft twists, pinion and ring in axle resist movement, rotating chassis. This guy: first, you'll oneed a doctorate in mathematics

[@mtzl1930]

Thank you for this informative video! Would you please make a separate video of the link geometry and how it impacts the truck's overall performance? The topics that we need a scientific explanation for are below: - Anti-Dive - Anti-Squat - Roll Axis - Roll Center - Body Roll Thank you again, and looking forward to hearing from you soon!

[@rcscientific6004]

Thanks for your message! With „link“ you mean the typical 4-bar linkage of the axles allowing for suspension movements? I noted your request and think about it!

[@rcscientific6004]

Question back to you: for which RC hobby would the answers to these questions be beneficial? Are you a racer or basher?

[@mtzl1930]

@@rcscientific6004 Thank you! Some people refer to this article but have a better approach to the concept of 4-Link suspension link geometry might define/explain the fundamental principles

[@mtzl1930]

@@rcscientific6004 it is for the rock crawlers not bashers

[@theorderofthepurplephoenix3321]

I think torque twist looks cool

[@rienerschnitzelfilms6764]

Great rubber boat animation! How did you animate that with powerpoint?

[@rcscientific6004]

This was a secret trick! 😉

[@danisantos3255]

hello mate, i just got an absima sherpa pro and a trx4 defender just like yours. the absima feels like it torque twists like hell and the immediate difference i see is the shocks. i've got s short video here comparing the two, can you look at it and tell me that the suspension in the absima is making me lose performance? because i think so but i'm not sure, i'm new to the hobby... thanks in advance

[@rcscientific6004]

Dear Dani, thanks for your comment. Sure, I am happy to look at your movie. How can you send it to me? Or will you upload it on your channel? Best, Robert

[@danisantos3255]

@@rcscientific6004 hey! Thanks for your reply. Yes, it is in my channel. I will test the car a little more today and if I get more examples I’ll upload. I can’t explain it very well but it feels like the rear squats a lot when one of the rear wheels is inside a crevice. This means that the COG is being pivoted and the car will tip over just from that movement. The traxxas I feel like it doesn’t swat as much, meaning that the front wheels keep traction more easily and I can’t find a way out easier. Thanks again!

[@alfinka7191]

Wow this simple thing have really complicated calculation 🤯 how u kmow all of this thing?

[@rcscientific6004]

Thanks for your kind comment! I am professor for robotics, but RC cars are my hobby. The movies are the result of both, profession and hobby 😉

[@havocmwf]

Did I just get my Degree in Physics?

[@-1-2-1-]

I appreciate you discussing this subject but your analysis is not correct for crawlers. Torque twist we experience in low speed crawling is not angular acceleration (that your discussion is based on). It would be f we were interested in drag racing however. But when crawling it is just static torque experienced at the rear prop shaft and how that is resolved into the rest of the suspension that affects us. Its as simple as that. You can observe it when climbing up a steep hill at steady state (no acceleration or inertial effect). You can also feel it by holding the front axel off the ground whilst the rear is driving. Also, rotating the motor 90degrees is also incorrect as this does not affect the torque moment at the prop shaft.

[@rcscientific6004]

You are completely right. However, our community discusses torque twist in different ways. Some mean the dynamic one (like in drag races) which I analysed in this video. Others, like you, mean the static one, which I explained in two other videos. Find them here: kzbin.info/www/bejne/qJ6cY6KuedGIY8Usi=wIdVyfomwUOkV4HF or kzbin.info/www/bejne/qp3EiomLqMxkrNksi=68gZ-nKng-AQkMOH

[@-1-2-1-]

@@rcscientific6004Thanks for replying. Yes that second static torque video is really the key for crawlers and problems people have. I noticed Cape Crawlers made a video on the subject but confused it with rotational inertia based twist and even used you hanging string visualisation. As a suggestion, it would be helpful for the community to see how you can reduce the torque twist experienced when climbing by changing spring rates, increasing axel gear reduction (bevels and portals) and reducing wheel diameter. And even using lower rolling resistance tyres will reduce the required prop shaft torque. I was surprised how significant that was when changing over to ultra soft tyres from hard stock items. Keep up the good work.