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RC Trucks 101

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Old 09-05-2011, 07:12 PM
  #1
Meafordguy
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Default RC Trucks 101

Hi all RC enthusiasts!

I am pretty new to RC trucking but loving it and becoming quite involved. I've already been spending a lot of time both fixing, upgrading and of course racing my Volcano brushed, as well as my new Caldera 10E brushless trucks.

I want to learn more about my new RC Hobby and I need to know the basics before I can really get going on this and possibly
even start a local club once I at least know the basics. Hoping a few of you out there have the patience to answer the most basic of questions to give me a good foundation.
Ready? Here goes...

1. The transmitter has two trim switches for the steering. The left is ST TRIM and the dial on the right is ST D/R. Playing around with these dials seem to have random effects.
One trim button would make more sense, left/right to adjust how straight the car goes while not steering. The effects seem to vary no matter how I set them so can anyone explain
exactly how they work and affect the steering on the car?

2. What is the Servo? The part that controls the steering? Or is it the part that controls the transmitter voltage to the motor?

3. What is the ESC? What does ESC stand for? Ditto to the above question.

4. Besides the obvious boost in power, what is the difference between a brushless and a brushed motor?

5. Why do Tamiya to Banana connectors all come with a male Tamiya end? Every car I own requires a female.

6. How can I connect a Banana connector to a wire on my own?

7. Why do Lipo batteries and Ni Mh batteries require different types of chargers?

8. If I put a different motor in of the same type (brushless or Brushed) do I need to change other parts such as the ESC or servo?

9. Why does it matter to have a transmitter with more channels when a simple 2 channel seems to work fine? (more channels are far more expensive)

Again, thanks in advance to any that answer these questions, this would at least help me get off to a great start!
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Old 09-05-2011, 07:14 PM
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Meafordguy
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Default RE: RC Trucks 101

I should add this as my contribution to the fun around here!

I just made this vid over the weekend!

http://www.youtube.com/watch?v=nGGXnclzjpY

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Old 09-05-2011, 07:59 PM
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Default RE: RC Trucks 101

I'll try to answer this as best I can.


1. The transmitter has two trim switches for the steering. The left is ST TRIM and the dial on the right is ST D/R. Playing around with these dials seem to have random effects.
One trim button would make more sense, left/right to adjust how straight the car goes while not steering. The effects seem to vary no matter how I set them so can anyone explain
exactly how they work and affect the steering on the car?

You have a steering trim and throttle trim. thats why you have two knobs on the radio.

2. What is the Servo? The part that controls the steering? Or is it the part that controls the transmitter voltage to the motor?

The servo is for steering.

3. What is the ESC? What does ESC stand for? Ditto to the above question.

esc means electronic speed control

4. Besides the obvious boost in power, what is the difference between a brushless and a brushed motor?

brushless motors have better performance.

5. Why do Tamiya to Banana connectors all come with a male Tamiya end? Every car I own requires a female.

I cant answer about the tamiya plug, my backdraft has deans and my hpi blitz has tamiya.

6. How can I connect a Banana connector to a wire on my own?

for banana connectors, if the battery has them, then obviously your esc must.


7. Why do Lipo batteries and Ni Mh batteries require different types of chargers?

they are quite different, thats why

8. If I put a different motor in of the same type (brushless or Brushed) do I need to change other parts such as the ESC or servo?

servo can stay, if you put a brsuless motor in, make sure the esc is brushless, same for brushed, also, if you upgrade a brushed motor, make sure your esc can handle it

9. Why does it matter to have a transmitter with more channels when a simple 2 channel seems to work fine? (more channels are far more expensive)

cant answer this one
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Old 09-05-2011, 08:50 PM
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Default RE: RC Trucks 101

If Lipo batteries are over charged they will explode and burn down your house. Lipo chargers are specially built to not over chage.
Brushless motors are very different from brushed. Brushed motors have very high wear electrical contacts while brushless uses the computer to regulate the rise and fall of the electrical field that makes the motor work. Brushless motors require a brushless motor speed control which is much more complicated than brushed but works a lot better.
You can buy adapters to make just about any battery fit any connector.
3 channel transmitters are used generally with glow engined cars that require the transmission be switched to reverse it, electric cars do it with the speed control.
http://www.youtube.com/watch?v=I05xyoeP-Zo

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Old 09-05-2011, 09:37 PM
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Default RE: RC Trucks 101

- Lithium Polymer (LiPo) is a different chemical composition than standard Nickel-Metal Hydride (NiMh), that's why they need to be charged differently.

- "ST TRIM" = How straight the car goes (precision adjustment of the steering)
- "ST D/R" = "Dual Rate", it adjusts how far your wheels will turn. If you adjust your knob from 0 to 10, the wheels will only travel 10 degrees on each side instead of full 45 degrees. This is usefull when doing very high speed run.

- Servo is the part (little motor) that controls the steering.

- ESC stand for "Electronic Speed Controller" and controls about everything in your car.

Advantages of brushless motors:
-Less required maintenance due to absence of brushes
-High efficiency, no voltage drop across brushes
-High output power/frame size.
-Reduced size due to superior thermal characteristics. Because Brushless Motors has the windings on the stator, which is connected to the case, the heat disipation is better
-Higher speed range - no mechanical limitation imposed by brushes/commutator
-Low electric noise generation

- Basically you just need 2 channels to drive an RC car (throttle and steering) but in some case a 3rd channel can be used for different things. Like on a Crawler to activate the "multi-select 4 wheel steering modes" or on planes to activate the landing gears.
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Old 09-06-2011, 04:14 PM
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Meafordguy
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Default RE: RC Trucks 101

Great answers guys and it has helped greatly.  The only unanswered question was about the connectors but maybe redcat support can answer that one.  If I could install my own banana connectors to everything then I wouldnt have to worry about the older tamiya style and getting
adaptor problems trying to make batteries fit to chargers and trucks.

I will play around with the steering trim a little more now that I have a better understanding of what they do.  I also notice the steering ability gets progressively worse as the battery level starts to drop, causing me to start messing with the trim switches once again!



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Old 09-06-2011, 05:04 PM
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Default RE: RC Trucks 101


Quote:
ORIGINAL: Meafordguy

Hi all RC enthusiasts!

I am pretty new to RC trucking but loving it and becoming quite involved. I've already been spending a lot of time both fixing, upgrading and of course racing my Volcano brushed, as well as my new Caldera 10E brushless trucks.

I want to learn more about my new RC Hobby and I need to know the basics before I can really get going on this and possibly
even start a local club once I at least know the basics. Hoping a few of you out there have the patience to answer the most basic of questions to give me a good foundation.
Ready? Here goes...

1. The transmitter has two trim switches for the steering. The left is ST TRIM and the dial on the right is ST D/R. Playing around with these dials seem to have random effects.
One trim button would make more sense, left/right to adjust how straight the car goes while not steering. The effects seem to vary no matter how I set them so can anyone explain
exactly how they work and affect the steering on the car?

2. What is the Servo? The part that controls the steering? Or is it the part that controls the transmitter voltage to the motor?

3. What is the ESC? What does ESC stand for? Ditto to the above question.

4. Besides the obvious boost in power, what is the difference between a brushless and a brushed motor?

5. Why do Tamiya to Banana connectors all come with a male Tamiya end? Every car I own requires a female.

6. How can I connect a Banana connector to a wire on my own?

7. Why do Lipo batteries and Ni Mh batteries require different types of chargers?

8. If I put a different motor in of the same type (brushless or Brushed) do I need to change other parts such as the ESC or servo?

9. Why does it matter to have a transmitter with more channels when a simple 2 channel seems to work fine? (more channels are far more expensive)

Again, thanks in advance to any that answer these questions, this would at least help me get off to a great start!
1: trim on the right is to center the steering. trim in the middle is to set the neutral position of the throttle. trim on the left is the steering rate.
it changes how much the wheels turn per the input you make when turning the wheel on the remote.
There are also 2 switches. one is for setting the steering as normal/reverse. the other is for setting the throttle as normal/reverse.
These are only used cause some servos and ESC's are set differenty from one car to another.

2: the servo controls steering. in nitro or gas RC's, as servo is also used to control the throttle/ brake function.

3: ESC, electronic speed control. modern ESCs control the power sent to the motor, as well as provide battery power to the reciever.

4: brushed motors have a rotor with wires wrapped around it, and magnets on the inside surface of the can(case)
the power is transfered by metal brushess to the rotor. thus the term brushed. these wear down over time, cause heat and friction and are less efficient.
brushless are the opposite. the magnets are on the rotor, and the wires are on the inside surface of the can.

5:bannan and tamiya plugs are completly differnt.

6:honestly, i recommend changing over to deans or traxxas plugs.

7:totally different chemical makeup. the individual cells of a lipo pack need to be balanced(charge to the same level)

8: all ESC's have specs(limits)
brushed motors are rated in # of turns. the lower, the hotter the motor(powerful)
most brushed esc's will have a rating stating the min # of turns it can handle, as well as the max battery voltage.
brushless ESC's usually have a rating of battery voltage as well. most brushless motors are rated in KV. this stands for the max # of revs the motor makes per volt applied.
a 3300kv motor will spin at 3300rpms with 1 volt applied(with no load on the motor)

9:a 2ch radio is all you need. more channels is only needed to run other things.
some RC's have a 2 speed trans that is switched by a 3rd channel.
extra channels can be used for light systems, a servo to raise/lower a plow ect.
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