TOPIC:

My vintage boomerang is in need of a new speed controller,which would be the best one for the job ? thanks.

Actually you have a lot of choice. But for the basic motors (23+ turns and regular power) you wouldn't need a high end one.
This will be sufficient :

tinyurl.com/6clwvyj

If you ever think of fitting ball bearings and choose - let's say - a 19 turns motor, this would be too much for this esc.
I run this :

tinyurl.com/3aovzem

It a perfect little controller. Suited for 13+ turns motors and fully automatic (no adjusting necessary) and multi failsafe.
Double the price of the Tamiya though.

And a choice in between :

tinyurl.com/3hhemzv

Just to show the esc - this seller has pretty high shipment cost...

Thanks for that. I may need the second one because my boomerang is fully ballraced and has a scorcher motor.

No problem, Andrian.

I think the Tamiya esc will be able to handle a 27T Scorcher motor also.
But with the Lrp you'd never have to worry about draining too much current.
Not even if you'd put a really bad badword brushed motor in it.
The Robbe has a limit of 17 turns I believe. I run this in my Grasshopper.
Not a bad controller either.

If you don't mind spending a little more, then the Lrp is definitely the best choice.
Interference in the signal will result in a shut off and not in a wild run.
And comes with 25-year guarantee!

Check what this guy did :



These EzRun sets are surprisingly cheap. Not all that durable though.
Also requires a lot of set up. But the result is just crazy!

www.hobbywing.c...icleID=426

This one is less fast than the combo in the video, but look at that price :

tinyurl.com/3fyv78p :blink:

My god that boomerang is fast.That is my ultimate goal,to get my car to go as fast as the one in the video,cheers for that mate.Is the motor i've got not that fast then ?

Adrianw wrote:

My god that boomerang is fast.That is my ultimate goal,to get my car to go as fast as the one in the video,cheers for that mate.Is the motor i've got not that fast then ?

The set I linked to has about 85% of the top speed that the car in the video has.
He has fitted the 13 turns version and the link is for the 13.5T.
It is the same brand but the last combo is a bit better suited for off road.

In general a lower number of turns will give you more top speed (and less torque) and a higher number of turns will give you more torque/acceleration (and less top speed). This is directly related to the maximum rpm a motor can produce.

The Scorcher motor (which is a Mabuchi 27T if I'm not mistaken) will not give you that much top speed.
It does have some good traction on the other hand.
I'm driving a 23T (rebuidable and still lots of power/torque) and I'm thinking about a 17 turns.
Which is a pretty solid set up with nice top speed but still a good reserve of torque.

The choice for a motor will this way always be a balance between top speed and momentarily available power.

I think the "sane" limit for your Boomerang would be with the set from the video or probably better with the one I linked to.
Fitting this kind of power might ask its toll on the car also.
Wouldn't recommend it anyway without ball bearings - but these you have on your car.

EzRun sets are brushless - so they're a different kind of motor from your brushed Mabuchi or my 23T Lrp.
Comparing the number of turns between these two types is not that accurate - this brushless 13,5T motor would probably be about the same as a 9 turns brushed. Which is kind of extreme for a Boomerang.
They run on alternating current (instead of direct current) and have to be programmed to run smoothly.
Also they're a lot more sensitive for water.
But they'll make your car fly!

Btw - sorry if I got all technical here. Don't mean to be a wiseguy, just like to talk about this stuff.

Edit : this motor together with a new esc will already make a huge difference :

tinyurl.com/3zxtdfc

It's in the UK - looks like an nice opportunity.

Tamiya Type-RR Super Stock Motor
A rebuildable high performance, high torque stock motor for electric R/C cars.
A 23 turn motor featuring special case for maximum heat dissipation.
Equipped with brush damper end bell and detachable chip type condenser.
Can be used during Tamiya's official races.
SPECIFICATIONS
Usable voltage: 7.2V - 8.4V
RPM at no load: 28000rpm (7.2V)
Torque at best efficiency: 225g/cm(7.2v)

Thankyou Edou,i too like talking about this subject even though i'm a complete novice.I very much appreciate you sharing your knowledge and i'll keep you posted.

Edou wrote:

Comparing the number of turns between these two types is not that accurate - this brushless 13,5T motor would probably be about the same as a 9 turns brushed. Which is kind of extreme for a Boomerang.

I think you meant 19 turn brushed.

You can go a much faster motor in a Boomer with no probs.

Falcon#5 wrote:

I think you meant 19 turn brushed.

You're right - I messed up there. I stand corrected.
Brushless motors have more torque and less revs than you'd expect from the number of turns compared to a brushed.
Not the other way around.

Falcon#5 wrote:

You can go a much faster motor in a Boomer with no probs.

You mean when you turn it into a RWD?

@Adrian :
Everybody's a novice at some point. Five years ago I was still with my head in the (Grasshopper) eighties!
But the Tamiya bug caught me again big time! So there was a lot of knowledge to soak up.
Having no pretentions here - especially when I talk to the guys that are like walking Rc encyclopedias.

Btw - I made a little calculation and the Tamiya RR I linked to should have even more top speed than the Boom in the video!
That's all about the rpm. The Tamiya can produce 28.000 rpm and the set in the video 3000 kV, which comes down to about 22.000. So 10-15% more top speed for the Tamiya!
This RR can make a lot of revs for its number of turns. It's faster than my Lrp too!