Wiring Plan Review

[kaladeth]

What do you guys think?

 

[nino]

Well... Yeah.

 

[CertifiedMike]

Are the servos powered thru the receiver or by direct power from the battery?
I don't know much about these big scale cars but I've seen external powered servos and I thought they were purpose built for these kinds of installs.
Its a beautiful car, however its wired!

 

[Finesavageboy2]

I hate wiring… makes my brain hurt…
Looks good to me!

 

[xjtorc]

The diagram is super overcomplicating a simple setup.... but doing the hobby your own way is what makes it so great!

 

[sylentk]

OK, not knowing anything about this company or model. I had to look it up. Why so complicated?

You must be NOT doing nitro and doing the electric version?

But even then, a braking servo for electric? IDK

And three fans.

Interested in hearing justification. Cuz that's out of my league. But keen on learning.

At least you have a plan.

 

[xjtorc]

OK, not knowing anything about this company or model. I had to look it up. Why so complicated?

You must be NOT doing nitro and doing the electric version?

But even then, a braking servo for electric? IDK

And three fans.

Interested in hearing justification. Cuz that's out of my league. But keen on learning.

At least you have a plan.

it's a 1:5 scale gas (no nitro) engine car. They make an upgraded brake kit which puts real rotors and calipers on the hubs which I'm assuming OP is running.

3 fans because soup can size motors get hot hot hot when speed running lol

 

[fstnd]

it's a 1:5 scale gas (no nitro) engine car. They make an upgraded brake kit which puts real rotors and calipers on the hubs which I'm assuming OP is running.

3 fans because soup can size motors get hot hot hot when speed running lol

If petrol then why an ESC, and "motor" fan? On the large scale forum I once read that mechanical brakes are beneficial in large scale, but I forgot the reason lol
I'm curious as well
I usually don't have much wiring plans for my nitro's

 

[xjtorc]

If petrol then why an ESC, and "motor" fan?

Clearly it’s being or has been converted to brushless.

 

[Cheetah928]

The fact you even have a plan is wild. I just get what I know I need and figure it out as I go. lol. what is the racebox micro? looks good to me tho.

 

[kaladeth]

Are the servos powered thru the receiver or by direct power from the battery?
I don't know much about these big scale cars but I've seen external powered servos and I thought they were purpose built for these kinds of installs.
Its a beautiful car, however its wired!

Thanks Mike! I suppose there’s a few different ways to do it.

The two methods I have used so far are this one, where the servos (and fans and accessories) are powered through the receiver which is powered by the BEC circuit in the ESC, which in turn is powered by the mains batteries.

The other way is slightly more complicated. I wired a separate / third battery directly to the receiver (as anyone would for a gas car). But need to be careful and remember to remove the power wire coming from the ESC (just connect the signal and ground wires) to the receiver.

Pros and cons for each approach, but I found the latter cumbersome so was going to start with the former and see how I go.

it's a 1:5 scale gas (no nitro) engine car. They make an upgraded brake kit which puts real rotors and calipers on the hubs which I'm assuming OP is running.

3 fans because soup can size motors get hot hot hot when speed running lol

I was surprised to find out it had mechanical brakes! Hence the extra servo for the brakes. I only have the simpler brake on the center, and not the fancy “Hydrax” disc brakes that go on the hubs.

I do have those on my Mecatech and they are just awesome:

Re: fans, interestingly on my Arrma Limitless cars, the one running the soda can motor runs the coolest and I don’t need fans at all to race it. But it is considered overpowered (e.g. fifth scale motor on a seventh scale car). So function of power:weight I suppose. And gearing.

Do you think I can get away with not upgrading the stock ESC fan on my MAX5?

If petrol then why an ESC, and "motor" fan? On the large scale forum I once read that mechanical brakes are beneficial in large scale, but I forgot the reason lol
I'm curious as well
I usually don't have much wiring plans for my nitro's

Yes I am converting a gas unit to an electric one, to be able to race in a particular race class.

Apparently the mechanical brakes are needed because using just the electric brake on a 30 lb rig will easily heat up both the motor and the ESC. Or so I was told.

The fact you even have a plan is wild. I just get what I know I need and figure it out as I go. lol. what is the racebox micro? looks good to me tho.

Haha hey that works too! I figured I would get organized better with this build, I want it to be neater than my usual wire-as-I-go approach.

The RaceBox is a little GPS tracker that logs racing lines and lap times. Useful for a beginner like me, but I imagine the more experienced racers are like “Why do you need that junk?” .

 

[Cheetah928]

Haha hey that works too! I figured I would get organized better with this build, I want it to be neater than my usual wire-as-I-go approach.

The RaceBox is a little GPS tracker that logs racing lines and lap times. Useful for a beginner like me, but I imagine the more experienced racers are like “Why do you need that junk?” .

But I thought that's what the transponder is for? Am I missing something?

 

[xjtorc]

But I thought that's what the transponder is for? Am I missing something?

transponders count laps. They do not record any data.

 

[Cheetah928]

transponders count laps. They do not record any data.

Oh I see it now. Transponders count laps and the race box tells you the stats of it. Makes sense.

 

[CertifiedMike]

Thanks Mike! I suppose there’s a few different ways to do it.

The two methods I have used so far are this one, where the servos (and fans and accessories) are powered through the receiver which is powered by the BEC circuit in the ESC, which in turn is powered by the mains batteries.

The other way is slightly more complicated. I wired a separate / third battery directly to the receiver (as anyone would for a gas car). But need to be careful and remember to remove the power wire coming from the ESC (just connect the signal and ground wires) to the receiver.

Pros and cons for each approach, but I found the latter cumbersome so was going to start with the former and see how I go.



I was surprised to find out it had mechanical brakes! Hence the extra servo for the brakes. I only have the simpler brake on the center, and not the fancy “Hydrax” disc brakes that go on the hubs.

View attachment 234779

I do have those on my Mecatech and they are just awesome:

View attachment 234778

Re: fans, interestingly on my Arrma Limitless cars, the one running the soda can motor runs the coolest and I don’t need fans at all to race it. But it is considered overpowered (e.g. fifth scale motor on a seventh scale car). So function of power:weight I suppose. And gearing.

Do you think I can get away with not upgrading the stock ESC fan on my MAX5?



Yes I am converting a gas unit to an electric one, to be able to race in a particular race class.

Apparently the mechanical brakes are needed because using just the electric brake on a 30 lb rig will easily heat up both the motor and the ESC. Or so I was told.



Haha hey that works too! I figured I would get organized better with this build, I want it to be neater than my usual wire-as-I-go approach.

The RaceBox is a little GPS tracker that logs racing lines and lap times. Useful for a beginner like me, but I imagine the more experienced racers are like “Why do you need that junk?” .

Your plan to simplify and eliminate excess weight and batteries makes good sense.

Very nice!

 

[Jerold]

Wiring wise, I think your fine. It's just DC power source. Splitting it is no big deal.

The crappy little connectors are technically are limited on power. The post (pin header) side is, maybe 5A max, and the socket side is 1-3A depending on the quality of the connector. The wire itself might be more limiting. 26awg is limited to ~2A and the 22awg ~7A. Truth be told, we have been over using our connectors and wiring for years and I wouldn't worry about it too much. The worst that will happen is it has some voltage drop and gets a bit warm.

The question I have is does your BEC have enough current? Each servo could be 1-3A and each fan could be 1-2A each. I have no idea what your current load is but it adds up pretty quickly.