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Silenz

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    Beginner looking for advice how to run the TT-02B at 50k km/h

    in Build Tips and Techniques

    Posted

    20 hours ago, Original Jardasius said:

    Yes to calculate you count the (pinion) aka motor gear and the (spur) aka transmission gear... As for the KV a lower number means more torque from a dead start,  ( In mechanical theory as any electric RC  motor spins up regardless of KV either the 2300 or a 5000 the torque is the  same as they spool up ) Not from a dead start, Then to spool and then to max RPM... So in this mechanical theory a lower KV has more torque from a dead start then a higher KV does... As for ball bearings checkout fasteddy bearings they make a full rubber sealed quality bearings set for almost every car on the planet and for a decent price.... Hope this helps  you out

    Thank you for the explanation!

     

    2 hours ago, Nwc100 said:

    Have a look on YouTube for a channel called Cageman.CH they do all sorts of tests using motors, etc and other electronics all on a TT02B might be worth a watch to see what they’ve used for those speeds, there is a Chinese (I think) and English version of each video and they are all 2-3 mins long so can get through a few them quite easily.

    I’ve found them quite a good watch to look at some new upgrades.

    That sounds great! Definitely will watch it and will learn from it!

     

    Thanks!

    Beginner looking for advice how to run the TT-02B at 50k km/h

    in Build Tips and Techniques

    Posted

    19 hours ago, Original Jardasius said:

    Those are decent upgrades and your on the right path I  would bring up the KV on the motor a bit more  to at least a 3800 or a smidge higher maybe up  to 4500 tops... I strongly recommend using a full ball bearings set (either ceramic or rubber sealed) rubber ones are cheaper but an excellent upgrade and a must have for ANY RC car... I would also change out the pinion to a hardened steel one a 26 to 28 tooth for they are stronger and wear much more evenly with time then the aluminum ones... Cheers hope this helps you out and welcome to the hobby!!!

    One question regarding KV. As far as I understood KV relates to the amount of revs at 1V, but how does it affect torque? Some manufacturers don't state the power oft the motor, hence I don't know how to calculate it then or is torque always enough for RC cars? Does torque drop at higher KV?

    Ah I see, right now I have open bearings. Do you use industrial ones? They are quite cheap as far as I know. Hardened steel pinion is no prob. Yet the speed gear is plastic, should that worry me? Why is there no metall option? Can someone please explain.

    9 hours ago, djmcnz said:

    I'm not familiar with the TT02 chassis but before you pull out the parts shotgun (and wallet) do a few calculations, top speed is a science, not an art.

    Once you know what you need to reach your speed goal, then you can ask/decide what components you need to upgrade to support that accomplishment.

    Start with this calculator or this one for a general idea that's based on proper calculations. You probably need to aim for 55-60km/h in the calculators if you want to hit 50km/h (actual) because of all sorts of variables those calculators can't take into consideration.

    Obviously you'll need a GPS unit to give you a proper speed reading, you might be surprised at how poor humans are at determining speed, over dynamic distances, with our eyes alone.

    FWIW, I like the way you approached the community with your question, some new people wanting advice aren't actually willing to accept that advice. Nice work and welcome. 👍 

    I will try to calculate with the first one (looks easier :D). As far as I understood I only need to count the teeth of my pinion and gears?

    I ask, because I want to learn :D I just hope I don't annoy you with my thousand questions.

    Thank you all!

    Beginner looking for advice how to run the TT-02B at 50k km/h

    in Build Tips and Techniques

    Posted

    Thank you for oyur answers. I totally forgot to mention it. I have the bearing set with ball bearings. I see the high speed gear set sounds nice. Is 68 teeth the one I am looking for or something with even less teeth? Do I also have to change the pinion gear?

    Sorry for the nooby questions, I'm not sure how the gear reatio should be. It seems I could go up to 27 teeth for the pinion, but probably the motor won't like it? Probably 50km/h is very moderate from your stand point I guess, so do I need the motor mount then?

    Ah the aluminium shaft and the prop joints is something I saw in many builds. Looks really nice!

    Would the 3000KV motor with 3S be acceptable instead of 5000KV? I did want a second battery pack anyway ;D

    Beginner looking for advice how to run the TT-02B at 50k km/h

    in Build Tips and Techniques

    Posted

    Hello all,

    I'm new to the hobby. Currently I just drive wild in the garden ;D Thank you for accepting me into the group!

    My first car is a TT02B with few modifications:

    Razer 1/10 brushless motor 3652 3000kV by Hobbywing

    Razer 1/10 brushless controller 50A by Hobbywing

    2S Lipo 4000mAh 7,4V 45C

    Carson CS-3 Servo

    I bought it as a kit and would like to know, if it is possible to reach 50 km/h with the TT02B. Motor and controller can use 3S Lipos, but I was told the gear would be destroyed by just changing the Lipo. What would I need to change, if I would want to go for that speed. I saw there are many parts available for the TT02, but as a beginner it's too much for me to decide whats worth it and what is not. I don't have something to measure the speed of my RC right now. I think it could be around 25-30 km/h by looking at it.

    Thank you rfor your help!

    Cheers,

    Silenz

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