The Tamiya RC car thread

[gazzarose]

Did it sound like I knew what I was talking about,lol. I've got no idea!

I'm assuming sensored and sensorless is just that, that the ESC knows what the motor is actually doing, and presumably adjusta something accordingly, maybe it's like the electric motor version of a lambda sensor!

KV in brushless terms is Rpm per Volt. So 1000kv would be 1000 rpm per 1 volt, so 10v would see it spinning and 10000 rpm.

Turns, as in 10t, 12t etc, I think is how many windings a motor has. With brushes motors the less turns, the 'faster' the motor, I'm assuming it's the same with brushless.

From my limited reading sensored motors seem to rated in turns and sensorless in KV.

[lufbramatt]

I think you can go down to 10.5t on the TBLE-02S? I'm about to send off for one of these for my lads Racing Fighter off a recommendation on this thread:

https://hobbyking.com/en_us/turnigy-trackstar-13-5...

Also a good idea to swap the motor pinion to the steel 19t one to get the best out of the motor and stop the gearbox being filled with swarf from the stock aluminium one.

[dom9]

Great value motors, those Trackstars. Slightly old tech now but unless you're challenging at the Nationals then they should be just fine!

You pretty much can't get a sensored motor, cheaper, anywhere else. Someone on ebay was even selling some 7.5Ts for £45 a piece the other day, yet they're <£30 from HobbyKing direct!

I run an 8.5T and 2 x 7.5Ts in my Schumacher Cougar KFs. Oh, and a 13.5T (and HobbyKing 1S ESC) in my RC12R5.

[ThisInJapanese]

lufbramatt said:

I think you can go down to 10.5t on the TBLE-02S? I'm about to send off for one of these for my lads Racing Fighter off a recommendation on this thread:

https://hobbyking.com/en_us/turnigy-trackstar-13-5...

Also a good idea to swap the motor pinion to the steel 19t one to get the best out of the motor and stop the gearbox being filled with swarf from the stock aluminium one.

I'll be interested to hear how you get on with this motor, I'm about to start a Blitzer Beetle and could be tempted into going brush less.

[lufbramatt]

I've ordered one, but still waiting for it to arrive. Will be a birthday present for my lad in April, so will report back once we've got it wired in

[pete]

ThisInJapanese said:

I'll be interested to hear how you get on with this motor, I'm about to start a Blitzer Beetle and could be tempted into going brush less.

If you are going for LiPo batteries rather than NiMH, then I find the Blitzer Beetle is plenty quick enough with a 2S LiPo and a basic Torque Tuned silvercan motor, at least for general bashing around. It's already as quick as a DT03 with a Trackstar 13.5 brushless motor, 19t pinion, but running on NiMH.

Any faster and I would fear for my laboriously painted Sand Scorcher homage bodyshell (excuse to gratuitously post this one again)!



Mind you, people say the Blitzer gearbox and chassis are pretty tough, so I might get a cheap Lexan repro bodyshell and stick a brushless motor in it after all...

[ThisInJapanese]

pete said:

If you are going for LiPo batteries rather than NiMH, then I find the Blitzer Beetle is plenty quick enough with a 2S LiPo and a basic Torque Tuned silvercan motor, at least for general bashing around. It's already as quick as a DT03 with a Trackstar 13.5 brushless motor, 19t pinion, but running on NiMH.

Any faster and I would fear for my laboriously painted Sand Scorcher homage bodyshell (excuse to gratuitously post this one again)!



Mind you, people say the Blitzer gearbox and chassis are pretty tough, so I might get a cheap Lexan repro bodyshell and stick a brushless motor in it after all...

OK, that can be done, I have options and a couple of other brushed motors kicking around. I would say there is a middle ground that's missing, from a silver can to brushless is such a big jump in terms of speed and power, I'd like to find something a bit quicker. Maybe the LiPo route it the way to go.

[lufbramatt]

Back in the day there were brushed motors around the £20 price such as the old Schumacher "17 double" that were decently quicker than a silver can but not as quick as the "modified" motors such as Trinity, Orion with lower winding and adjustable timing.

Something like this would be a nice little upgrade over a 25-27 turn silver can:

https://www.modelsport.co.uk/etronix-sport-tuned-m...

just make sure your speed controller can handle the extra current.

[Crafty_]

I've got one of these as a cheapy replacement for a 540, its quite a bit quicker!
fixed brushes etc but for £9 you can't complain https://www.modelsport.co.uk/hpi-firebolt-15t-moto...

As above, you need to make sure the ESC will handle the low turns, if it won't these are good and cheap https://www.modelsport.co.uk/hobbywing-quicrun-106... there are copies on ebay for £7-10, not sure how good they are, you can probably find a genuine one for about £15

[ThisInJapanese]

I've got a TBLE-02S with the kit, I have a few other ESCs as well (you really do pick up a lot of random spares with this hobby...)

With some of the random used kits I've bought I've managed to collect the following spare brushed motors:
- Etronix RC Sport Tuned 20t - https://www.modelsport.co.uk/etronix-sport-tuned-s...
- Mabuchi Torque Tuned RS-540 - https://www.modelsport.co.uk/tamiya-torque-tuned-m...
- Dynamite DYN1171 20t - https://www.modelsport.co.uk/dynamite-20-turn-brus...

No idea what the differences are, but I could try them in the car to see what they are like. The lower the number of turns is roughly equal to the speed of the motor, is that right?

Edited by ThisInJapanese on Wednesday 24th March 11:44

[lufbramatt]

It's pretty much less turns = less resistance in the motor coil

current = voltage / resistance

power = voltage x current

so less resistance = more powerrrrrrr

[ThisInJapanese]

lufbramatt said:

It's pretty much less turns = less resistance in the motor coil

current = voltage / resistance

power = voltage x current

so less resistance = more powerrrrrrr

Thanks, been reading up on it.

Have also found this ESC in the collection, looks like it can go down to 12t on 2s and has the right connector already on it. https://www.modelsport.co.uk/maverick-msc-30br-wp-...

[Bill]

Do steering servos wear out fairly easily? Son's Rising Fighter hasn't been massively used but the steering servo only turns through half its available range. As in the wheels can be turned manually twice as far (or more) compared to the angle the servo will turn them through. It's a Carson reflex CS3.

Compared to daughter's new Lunchbox which tries to turn the wheels beyond the stops.

[kingston12]

Bill said:

Do steering servos wear out fairly easily? Son's Rising Fighter hasn't been massively used but the steering servo only turns through half its available range. As in the wheels can be turned manually twice as far (or more) compared to the angle the servo will turn them through. It's a Carson reflex CS3.

Compared to daughter's new Lunchbox which tries to turn the wheels beyond the stops.

It's a good question, I'm not sure though.

I recently got a Lunchbox for my nephew with a cheap Core RC servo and found the turning circle comically wide, but assumed that was just the nature of the Lunchbox.

When I get my hands on it again, I'll check if it is the servo underperforming - I did notice that it was really noisy compared to others I've used in the past.

[Bill]

At least it's not just me! However I just went out for a play and noticed a little knob on the remote labelled "ST.D/R" that someone had turned down to 0!

Daughter's Lunchbox now has the worse turning circle, although the servo is straining at the servo saver so I suspect it's a product of the car rather than the servo.

[Bill]

FWIW the Lunchbox has a 5ft turning circle Vs 3.5 for the Rising Fighter.

[gazzarose]

Bill said:

At least it's not just me! However I just went out for a play and noticed a little knob on the remote labelled "ST.D/R" that someone had turned down to 0!

Daughter's Lunchbox now has the worse turning circle, although the servo is straining at the servo saver so I suspect it's a product of the car rather than the servo.

My boydid the same with mine. I couldn't work out why it was working fine 1 minute, then after he'd driven it the steering was crap. I think the answer is not to let children use them and keep them for ourselves!

[lufbramatt]

I gave my lad my old 27mhz Acoms Techniplus radio which doesn't have any fancy dual rate stuff!

It's a shame no-one still makes a set like that, the metal sticks feel so much nicer than the new but plasticky 2.4ghz Futaba set I've got, and the 8x AA batteries give it a nice weight.

[Sub5]

Finally managed to find some time to recomission my old TL01 chassis for some bashing.

Not much needed to get the old girl running sweet. My Yokomo 17t motor cleaned and fitted with new brushes. New M-tronics Viper Tempo 15 fitted.

New cheapo ready painted shell off eBay. Looks ok for the money. Will do till some stock starts reaching shops. Couple of Voltz 5300 batteries. Also upgraded the radio gear to Abisma CR3. Very nice for the money

Our first bash about tomorrow.









Still undecided on wheel colour

Edited by Sub5 on Saturday 10th April 00:36

[Deadlysub]

As a kid in the 80’s I always wanted either a Hornet or Monster beetle but I was never lucky enough to get one (poor me).

I ordered a Hornet through Jadlam last week and started the build last night. As others have said I think I’m going to enjoy the build more than driving it!