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Zero's Class 3...

thzero

Rock Crawler
Joined
Dec 16, 2009
Messages
539
Location
Chicago
So after having built several class 3 rigs; a Wraith, a EB tuber, a fast back Wraith, and a Ultra4 IFS I've decided to build a chassis from scratch... I like my fast back Wraith but I'm tired of breaking the plastic tube frame!

Here is the gear that is going on it.

  • Wraith kit
  • Axial Comp Shocks (AXI30224) using the smallest rod end.
    • Running 30wt oil, medium pistons.
    • Springs: RR - black, RF - purple, LR - purple, RF - orange. The front's are stiffer than the rear because I'm a servo mounted winch and MG200's front bumper, both increase the front end weight over the stock plastic bumper.
  • Front Axle
  • Rear Axle
  • Chassis
    • Custom! Whatever I want it to be!
    • CMS
      • Front
      • Rear
  • Drivetrain
    • MIP Driveshafts
  • Transmission
    • Robinson Racing gears (never leave home without them)
  • Wheels/Tires
    • Custom made GripFab wheels!
    • RC4WD Interco IROK 2.2 Super Swamper; 3 oz front, 1.5oz rear.
  • Electronics
    • Savox SV-1270TG Digital "Monster Torque" Titanium Gear Servo (High Voltage) x2
    • Castle Creations Mamba Max Pro (waterproofed)
    • Tekin Pro4 3300kv
    • FlySky 6 channel receiver
    • HeyOk relay winch controller
    • Servo winch
    • RIGID INDUSTRIES 3" LED light bar Silver (http://www.vanquishproducts.com/riin3ledliba1.html)
    • 4 front, 2 red rear (w/brake) and 2 amber rear 5mm led lights and control kit from rclightkits.com
    • Various Elite, Sky and TrueRC battery backs
  • Accessories
    • Hobby Gear 1/10 Scale Bungee Cords (15108)
    • Homemade 12" tow-rope
    • R2J pull pall
    • MegaFattie sand ladders
    • RC4WD King Kong d-rings
    • RC4WD shackles
    • RC4WD snatch blocks
    • Tamiya Driver #58242

He's the look I'm sorta going for...

DSCF5040_zps10f50107.jpg


For ease of reference, here are the modded FlySky version 0.6.1 firmware recipes I am using for 4WS, 2-speed and winch.

  • Activate 4WS mix
    • EPA {long press}
    • 4 {press}
    • 3 {press}
    • 0 {press}
    • CR0 {press}
  • Map the 4WS mix to ST trim buttons
    • REV {long press}
    • 1 {press}
    • 4WS {press}
    • BNL {press}
    • 100 {press}
    • RE0 {press}
    • OR0 {press}
  • Map CH 3 button to turn 4WS crab on/off
    • REV {long press}
    • C {press}
    • 4WS {press}
    • MO0 {press}
    • RE0 {press}
    • PV0 {press}
    • OFF {press}
  • Map D/R switch to control winch (channel 5)
    • REV {long press}
    • d {press}
    • CH5 {press}
    • BMO {press}
    • RE0 {press}
    • PV0 {press}
  • Map back to control 2-speed (channel 6)
    • REV {long press}
    • b {press}
    • CH6 {press}
    • MO0 {press}
    • RE0 {press}
    • PV0 {press}
    • OFF {press}
    • * Adjust the endpoints for CH6 as necessary

FlySky Manuals
https://drive.google.com/file/d/0B1zg08q_w1Mwd3hyRGFCZzJQUlU/edit?usp=sharing
https://drive.google.com/file/d/0B1zg08q_w1MwQklrcTlEUkxDbUk/edit?usp=sharing

FlySky Programming Guides
https://drive.google.com/file/d/0B1zg08q_w1MwWS1IVnRYRElZUTQ/edit?usp=sharing

FlySky Programming Recipes
https://drive.google.com/file/d/0B1zg08q_w1MwMVB3UkZpS0hnZUk/edit?usp=sharing
 
Last edited:
And here is the start of my chassis. Solid 3/16 steel rod that is brazed together. I'm planning to use the 3/16 rod for most of the base, but to switch to some 3/16 brake tube for some of the upper pieces to help keep the CoG lower.

IMAG0274_zpsa3f81fc3.jpg


Oh yeah, and its all being built in my kitchen.
 
Awesome parts list man. Are you going to run the beefy top shaft on that tranny? I'm looking forward to watching the progression.
 
More progress...

IMAG0285_zps56a78599.jpg


IMAG0282_zps5e6c9211.jpg


Waiting on an interior to arrive since I couldn't find the spare I thought I had. Want to make sure that the interior fits with a few layout items before proceeding.
 
So I completely pulled apart and rebuilt the cockpit area twice before I was finally happy with it. It fits the interior, my little driver guy and should be able to get a passenger in there too.

IMAG0300_zpsafabc8d2.jpg


IMAG0301_zpsa4766c05.jpg
 
It's starting to look more like an r/c vehicle. Got the skid plate all mounted. I was really scared about that, since if I screwed up the mounting holes I'd have a lot of work to do to fix it. But it all came out ok. The initial position for the front-shock mounts didn't quite work, so I pulled them off and re-positioned them. Will have to get some shots a bit later on.

IMAG0314_zps8886777e.jpg
 
Front end is mostly done. Need to figure out how to attach the hood and run some headlight mounts. But otherwise, mostly need to focus on the rear and then do the lightbar.

The front end transitions nice and smooth with full suspension travel; that was something I was never able to get with the Wraith and CMS.

IMAG0325_zpsef12dc19.jpg


IMAG0324_zps55314cfc.jpg
 
I should mention that the grill guard and winch mount is a chopped up MG200 wraith grill guard. :)
 
Getting close... front and rear completed. Rear panhard bar in, but still need to build the panhard itself. Shelf for electronics in rear completed. Even the tire mount done. Just need to finish off the front lightbar, rear light mounts and mounting for the radiator. Oh and tubes for side panels in the cockpit area.

IMAG0331_zps897dbfe3.jpg


Closeup of the rear, although not the best photo. May need to try and get some better photos.

IMAG0327_zpsb9c5408f.jpg
 
Right now, it weighs in at 2lbs. Thing I am going to try and do a bit of lightening on the plates, help lose a few ounces maybe.
 
Put in an order for three new servos for the vehicle...

Savox SV 1270TG Digital Monster Torque Titanium Gear Servo High Voltage

Those are going front and rear. Front will, along with the winch, be off one Castle 10amp BEC and the rear and probably the lights will be off its own Castle 10amp BEC. Both will be running the 7.4V fed by 3S 40C bats.

Savox SH 0255MG Digital Metal Gear Micro Servo

That little guy will be powering the AX2 2-speed. It and the receiver will run off the BEC @ 6V from the ESC which is going to be a water-proofed Castle Mamba Max Pro.

Tekin Pro4 4400 is the motor of choice.
 
Chassis should be mostly done now. Just have to braze on attachment points for the hood, the side panels, and the top. Oh and for the radiator too.

The chassis is setup for 4ws with cms and panhard mounts both front and rear, servo winch, rear tire mount, and uses the Wraith interior and skid pad. It will have AR60 axles; I might run the extended AX10 axles I have, but not sure that I have parts for 4WS with them.

IMAG0334_zps8b0e23dc.jpg
 
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