Andyfish2000

Brushless and/or Lipo for re re Hotshot

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Having put the cars down for the last year or so whilst I built up my flying capability, I have a renewed interest again in getting some of the cars running.  One thing that I have avoided up to now is lipo batteries and brushless motors, but with the planes mostly having them i have begun to understand some of the benefits and so thought I ought to consider upgrading the cars.  So my first one is likely to be my hotshot re re.  It currently has a sport tuned Tamiya black motor which obviously adds some speed,  Would I gain a lot from simply getting a lipo (and LVC) for it on its current set up or should I also consider brushless motor and new ESC?

Thanks

Andy

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Adding lipo on its own does make a difference, I was surprised when chucking a 2s lipo into a stock TT02B how much faster it was.

The thing with brushless motors is you need to get the gearing right to make the most of it. In my Boomerang i run a Trackstar 13.5T with the biggest pinion (17t I think) and I find it goes really well on NiMH. 13.5T is the sweet spot for me in Tamiya buggies (well the rere or budget end, obviously TRF or DB01 could handle faster). I run the TBLE-02S as well, you don't need to change ESC. You wouldnt be able to gear a 17.5T high enough in a Hotshot, they get to about 7.8 FDR from memory which is probably better suited to 10.5T. 10.5T pushes the limit of the ESC though.

I prefer NiMH for bashing as I can leave them charged and usually when we run in the backyard its my son asking to do it right away. I use lipo for racing but don't have any that fit my Boomerang so haven't tried it.

 

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Yep, what Jonathon said!

Lipo faster, check.  13.5T being the sweet spot for TBLE02s, check.  Higher gear ratio, check.  

 

If you are curious about NiMH vs LiPo?  About 12-15%.  Because LiPo is lighter, has a higher voltage and maintains the high voltage during discharge.  Sometimes though, a heavier car feels better. So that's something else to consider.  

 

 

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As above, lipos add a volt+ more, a tonne of amps more, lighter and sustain the voltage longer before dropping off, just need a bit more involvement in looking after them.

Brushless motors are more efficient,  so more of the energy is converted into speed/power and if you go for a Sensored system,  can alter the timing through the rpm range, giving a real boost in rpm.

I'm loving the 10bl120 esc atm, will run down to a 4.5t motor on 2s, or a 13.5t on 3s, for under £40! :- 

https://www.modelsport.co.uk/hobbywing-quicrun-10bl120-sensored/rc-car-products/425021

(Its a bit of a faff altering the settings, drag brake etc with the button, but once you do it a few times you get used to it, or get a plug in programmer) 

That'll leave, pretty much any brushless motor to choose from, I know of people running that chassis with a 10.5t on 3s, but a 13.5t maybe a good starting point.

 

 

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