Brushed Motor RPM Comparison
Vložit
- čas přidán 26. 06. 2023
- Well my friends after my Super Clod Buster didn't go any faster with 15Turn motors in it I decided to check out what the difference was if any between the Holmes Hobbies 15T and Tamiya stock Mabuchi Silver can. I also found an old Tamiya Johnson silver can and an Absima Thrust Eco 15T so decided to test those as well and this is the result.
Reported Specs of the motors.
Mabuchi Silver Can 27T 14000 RPM at 7.2V
Johnson Silver Can 27T 14500 RPM at 7.2V
Homes Hobbies 15T 20880 RPM at 7.2V
Absima Thrust 15T 32000 RPM at 7.2V
This is not a definitive test as the equipment was fairly cheap and in no way calibrated.
My conclusion was that the HH should have been faster being nearly 7000 RPM faster so maybe the torque just isn't there to spin the wheels of such a big rig. But you can draw your own conclusions.
Hope you enjoy! - Auta a dopravní prostředky
Thank you for sharing! I was trying to do my research on how much KV a stock Mabuchi Silver Can 27T is and came across your video. With your findings of 16734 rpm at 7.2 volts, that equates to roughly 2324KV. Someone below claimed they got their motor up to 20,600 on a freshly charged battery, which is 2861KV. So, for my research, I'll be optimistic and average it up to 2500KV. Again, thank you very much!
Thanks for showing this test Rob. And you're right, not the absolute numbers, it's the relatives that count.
For me relative is what counts! Thanks for watching and best wishes dude.
Very cool video sir, I enjoyed that.
Those results seemed pretty fair to be honest.
This would be a cool little set up to have..... I have soooo many different motors, it would be great to be able to test them all!
By the way, glad to see I'm not the only one still mainly using brushed motors!
Cheers matey! 👍 👍 👍 👍
Hi James. Yeah with these NiMH batteries they last long enough for me with brushed motors and to be honest they are loads cheaper than most brushless ones. I have quite a few more but am too lazy to take them out of cars to test them 😂😅 Many thanks and all the best mate.
Glad to hear the legendary laugh, it was well worth a watch 👍🏻
Hay Damian. Got to try and get it in at some point in all my vids 🤣😂 Thanks for watching and ATB buddy.
G'day Rob😃. That old Johnson motor's in nice condition for its age👌.
Nice test rig mate👍, who cares if it's not super expensive or hi techs, I reckon that was a pretty good comparison Cobber👌🏆. Thanks for sharing your interesting video mate👍🦘🇦🇺
Yeah it hardly got any use before being replaced🙂
My thoughts exactly and you are very welcome. Thanks for watching and ATB cobber.
Hi mate, interesting vid. those little Absima Thrust motors are great for the money! Great budget bangers!
Hi James. Yeah quite a lot more revs than the HH and you can get them for less than 10quid. Many thanks and ATB buddy.
Nice testing! I should get a little setup like that! I am always curious about the actual speeds of the motors and this is a very effective and simple way to test them! Like you said, it is not 110% proven fact but it does give enough feedback to understand which ones have faster rpms so good enough for me! Thanks for sharing the cool video!
Thanks Adam. Yeah just need to have a look to see how I can mount the meter permanently and possibly add a TBL-04 so I can measure brushless motors. All the best and stay safe my friend.
That was really interesting to watch, Rob! And I think your test rig was great for the comparison purpose, I trust those results!
We still need to figure out why the Hell your Clodbuster wasn't faster than Mark's... I could imagine you try two things: Either you continue to use the Holmes motors in the Clod, and try with a bigger/better battery, I am convinced you will get more speed! Or you could try install the Holmes in a buggy and see how it performs, I would imagine it will be great!
I have Holmes Retro motors in three buggies now, and I love them all, I know I might have a bit of bias towards the brand, ha ha!
Hi Mads. Cheers buddy. Yes it is an enigma for sure, all I can think off is torque!!!!!
Many thanks for watching and all the best dude.
Hi Rob You have to do try this when testing motors with the laser beam get a pinion gear paint it black and super glue a little sliver across it for the beam to pick up it will be more accurate and you can swap it out to each motor easy this is what I do it works great. nice test. black out near the end.
Thanks for the tip Steve. I have found a black gear so will give it a go. Thanks for watching and all the best buddy.
Interesting little motor test, that rpm-meter seems to be somewhat accurate and for a great price too.
Interesting comparison 👍😎👍
Thanks 👍
Interesting results, and as you said in the description maybe it's a torque issue. RPM is one thing, but if the torque of the motor isn't there it'll defo struggle with the huge wheels and tyres of a Clod!
That's my thoughts at the moment. Thanks for watching and ATB my friend.
Hope you did a full risk assessment now you’re using lasers 😅 great work 👍😃
All in hand. Laser prove goggles and helmet worn at all times😂🤣😅 Thanks for watching and all the best my friend.
Cheers Rob! That’s quite the set up ya got goin for sure! 👍👌 I like that little device for counting the revolutions. Was it just tape around the motor shafts that the device was picking up?
Yes the Tachometer comes with three strips of reflective tape and you can purchase more but if you put a pinion gear on and paint it black if it's a silver colour you can then paint a stripe using Tamiya chrome silver. Thanks for watching and ATB my friend.
Hi there Rob, a very interesting RPM test, interesting that the Johnson’s 540 motor, was much more free refine than the Mabuchi motor. Best wishes to you and the family 😊😊
Hi John. Yeah it does make you wonder why they changed! Many thanks and the same to you and yours fella.
Hiya Rob, Great video Dude!!!! Most motors spin counter clockwise as you look at them from the output shaft end. The stock motor, the first one you did, at 16,700 rpm seems to be what I got with my motor dyno, I got 13,100 to almost 17,000 RPM's (voltage from 6v to 7.4v). Your little hand held tach seems close enough mate. Love the "bench" for the test... That squeal the Johnson let out might just dry bushings in the motor. The Holmes motor should be zero timing either way it spins, if it had more timing one way or another, the rpm would be way more farther apart, 100's to 1,000's of rpm's. This is an Awesome test man and you have a ton of motors you can test.... Love test videos like this...... Great Job again my Friend, ATB!!!!!!!!!!!
Thanks for the info dude. Yeah that Johnson motor must have been in my spares for 30 years. I set that rig up to run brushed motors in but don't tell anyone but I can't be arsed now 👴😅🤣😂 Cheers buddy and the same to you and yours matey.
Some years ago i measured the stock motors in my super clod with the same kinda tachometer, with a fully charged GP 3300 7.2v battery i got between 20,000 and 20,600 rpm. The super clod was the first version with mechanical speed control but the motors were the same mabuchi type with grey metal endbell (nr 7535076) which is the motor today known as "540-N"
Hey what a great idea Rob. I didn't know that such a device existed. What is it actually meant for? So really your Clod should have been quicker than Mark's or is there something about torque that you also need to know? Anyway, interesting video mate 😁👍👍
Hay Pete. It's basically a non-contact Tachometer for measuring the RPM of almost anything that spins. Yeah it could be a torque issue but have no idea how to measure torque. Many thanks and Atb matey.
💋 Promo-SM