SERVO Help - Custom Build

[kladal]

Hello,

I have a custom build that will only barely resemble the truck you see in the pictures below by the time it's complete.

Here are the specs:
-Motor = 2217 2y 640kv CC/Neu
-ESC = Megapower 120A
-Battery = 10s (two 5s)
-BEC = Castle Creations BEC Pro at stock 5.5V
-Tires = IMEX Swamp Kong 8.5"
-Weight = estimated 22-24 pounds

I will be installing TWO steering servos for four wheel steering. I've been advised that I need a high-torque servo.

1. Any recommendations on how much torque I should have? (Thus far I've been considering the Futaba BLS352 OR SAVOX SC-1256TG).

2. Which between these two uses less power?

3. Does anyone recommend any other servo?

4. I've been told two servos be linked via a y-hardness. How will they each attain sufficient power??

5. How do I connect these so they each do the opposite?

6. Does anyone see any problems with this steering system?

Thank you for your input!

(When I asked a servo question in my other thread, no one responded).

[reno911]

Hitec 1/5th scale may be up your alley. Unless you run a higher bec voltage.

[Arct1k]

Just install one front and rear 7980 on 7.4v - 600 oz will be enough

Reality is a 7950 at 480 oz would be OK to...

[Arct1k]

That futaba is pretty weak only 250 oz

[whitrzac]

http://hobbycity.com/hobbyking/store..._.118sec_/_78g

[kladal]

Why does this vehicle require that much torque??? Tires+weight??

Can someone tell me OR post a pic as to how I should hook up the extra LiPo battery?

Thank you.

[reno911]

Why an extra lipo? Can't you set the voltage on the Castle BEC?

[kladal]

Originally Posted by reno911

Why an extra lipo? Can't you set the voltage on the Castle BEC?

Reno911 - since I'm using two servos, what should I set the voltage to if each receives 6V? Is it a simply 6+6 = 12V? Please keep in mind I'll be connecting the two via a y-harness.

Thanks.

[reno911]

Then set your voltage to 7.4 or higher if needed.

[reno911]

What receiver will you be using?

[reno911]

Originally Posted by kladal

Reno911 - since I'm using two servos, what should I set the voltage to if each receives 6V? Is it a simply 6+6 = 12V? Please keep in mind I'll be connecting the two via a y-harness.

Thanks.

You don't need to supply twice the voltage, but it will pull more amperage. Which the BEC should be capable of.

[kladal]

Originally Posted by reno911

What receiver will you be using?

Receiver: Airtronics MX-3 Sport 2.4GHz FHSS-2

[crazyjr]

https://www.airtronics.net/index.php...aitfile_id/56/

One problem, in the specs on the first page, max voltage is 6 volts(5 cell NIMH). I know most NIMH are higher first off the charger, not sure how much or if the reciever is really designed for higher volts