Steering Servo and Weight.

[andy_n]

I want to replace the steering servo on my LNC, but I don't understand what the differences are and if there are only certain ones that will work?

Also wanted to weight the front wheels, what do people use for this. I had a look on fleebay, but the price of weight seems extreme.

[Jimmyb]

Grab some stick on wheel weight from a motorcycle store and take them inside the ride then remount tyres. Steering servo, grab a high torque one, like a 16kg one, more turning power.

[andy_n]

Does it matter the type? Are they all the same.

[nzdans]

Howdy,

I'm over half way through the build of my SCX10 now (done axles, suspension, chassis just gotta mount ESC, Rx and most importantly TJ shell). Anyway just for you I had a go at my idea for budget wheel weighting; the 2.5mm rolls of lead roof flashing from Bunnings - I had some laying around at work. Anyway I have started off light weight although should easily be able to get 100g per wheel if required. As you'll see from the pics I've just cut some 7.5mm wide strips, length being restricted by the width of the roll and added a couple to the channel in the centre of the rim. This mod has given me 35g per wheel; to add more I can go longer strips then add strips the full width of the rim. I plan to hold the current strips in with electrical tape and/or cable tie although I have some seriously HD double sided tape I can use for the wider strips as well. Currently the test wheel is pretty well balanced although the best method for strips is to cut the ends diagonal so they fit snugly together. PM me if you'd like me to send you some flashing as I have more than I can use.

Re servos I still don't get why folks think they need to use such high torque units. I have wasted way too much time and money on R/Cs including a couple of high end 1:8 nitro monster trucks and a 1:6 gasser, 13kg was ample even to turn 4" wide tyres on carpet while the truck was stationary! I am only a noob to crawling so for some good opinions have a look at rccrawler.com. As I'm still an RC geek at heart I have installed a 24kg servo in my rig (mainly as it looks cool). I will however suggest that a good name brand servo is used (Hitec, KO, Futaba, Sanwa, Ace etc), the Hitec 645 is a great high torque analogue servo for not too many $, I've seen a few crawler builds using this one.

[andy_n]

That looks quite tidy.

[CRDSTU]

That's a great way of doing it and here's a few tips and info regarding adding weight.

- It adds stress to your drivetrain as there's more for it to push and climb.
- Uni's wear out quicker, Servo's are under more strain ect.

Dont go to far with weight and more to the point, strategicly place it. On or around the axles is best. Servo's are usually rectangle so you can get a good amount stuck onto the back and sides of them. Ideally you want it (as said above) on or around the axles to get the lowest center of gravity and maximum grip.

Dont go too far with adding weight. I found there's a limit to where it works best - then works against you. Remember the truck still has to climb up hills!

[Bogged]

To get the best performance out of the steering servo, get a BEC- Battery Eliminator Circuitry, this will give the servo the dedicated voltage to power it to it's full potential.

I found mine struggles now, but I need to bet the BEC or a receiver pack to make it better!