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FingerTech 'Viper' Combat Robot Kit
In Stock: 26
FingerTech 'Viper' Combat Robot Kit
  • Description
  • Specifications
  • CAD Files
  • Reviews
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Note Nov 28: Limited number in stock!  Until more Twist Hub Keys arrive, once these are gone you can buy the Viper with Snap Hubs by using  THIS product.

Updates!  The Viper now uses our new and improved Twist Hubs!  It also includes a JST-to-9V Adapter cable so you can power it with a 9V battery instead of a lipoly battery (saving you the cost of battery and charger until you are ready to upgrade!).  We've also updated the sticker.  :)

The Viper Combat Robot Kit comes with everything you need to get started in combat robotics.
- The custom-formed 6061-T6 Aluminum chassis has plenty of strength and space for additional components and upgrades.
- A 6-Channel radio transmitter and receiver pair leaves four channels free to add any active devices you desire. (Optional, in case you already have a radio.)
- Two FingerTech "Silver Spark" 33.3:1 ratio gearmotors with 2.25" Foam Wheels provide both speed and pushing power.
- Two FingerTech "tinyESC" speed controllers translate the radio receiver commands into motor movement and provide 5V power to the radio.
- Polycarbonate combat armor keeps the components safe.

The Viper kit is fully intended to be sawed, drilled, modified, and upgraded. Recommended for ages 10+ (6+ with a parent).
Its base weight is only 313grams (11.0oz) leaving 141grams (4.97oz) for additional parts if entering the Antweight (1lb) weight class (We don't recommend running the Viper in the beetleweight class versus 3x larger opponents!)

These add-ons fit right onto the existing Viper robot chassis - no machining or soldering required!

Viper Lifter add-on

Take your Viper Combat Robot kit to the next level by adding a powerful servo-actuated lifting arm!

Viper Spinner add-on

Add a vicious horizontal spinner weapon to your Viper Combat Robot!

*Transmitter and receiver are required. If you already have them, you can say "No" to the Radio Option below.
*The Viper can be run off a 9V battery (not included), but for maximum competitiveness we recommend using a lipoly battery. Lipoly Battery and Charger are available as an option below.

• See the Specifications Tab for more information.
Body Width: 16.5cm (6.5in)
Length: 14cm (5.5in)
Body Height: 3cm (1.18in)
Weight: 313grams (11.04oz)

Kit Includes:
Chassis:15gauge (1.45mm / 0.057in) 6061-T6 alloy Aluminum stamped and formed baseplate (pic). Has mounting holes for motors, armor and add-on kits.
Motors:2x 33.3:1 Silver Spark Gearmotors
Motor Controllers:2x tinyESCs translate the radio commands into motor movement and power the receiver.
Wheels:2x 2.25x0.75" Foam Wheels are soft and grippy.  A direct hit will be absorbed and won't destroy your motors!  Includes 3mm x 0.75" Twist Hubs and Twist Hub Key.
Battery:A JST-to-9V Battery Adapter is included for operating the Viper with a 9V battery. (9V battery not included.)
- One or two 9V batteries (two doubles run-time). We recommend Duracell Procell (PC1604) for over two hours of run time and bursts of 12A (using 2 batteries). Procell's can run a HXT12K servo at 1.5A continuous (while driving) for well over 15 minutes. (Robot matches are 3 minutes each.)
For maximum competitiveness, we recommend using the rechargeable 7.4V 300mAh "Galaxy" lipoly pack, available with Lipoly Charger as an Option below.
Power Switch:A Switch/charge jack that you unplug to turn on. Comes pre-soldered with a female JST connector and includes a pair of Mini Terminal Blocks for making wiring connections.
Plug has male JST end for easily recharging the lipoly battery. (Do not attempt to recharge a 9V alkaline battery.)
Armor:3mm (0.118in) thick front wedge and 1.5mm (0.059in) top armor made of high-strength polycarbonate.
Screws:Four 2-56x0.125" screws for mounting the motors. Ten 6-32x0.25" screws for fastening armor.
0.05" and 5/64" hex wrenches included for tightening screws and setscrews.
Instructions:Detailed instructions with many pictures and tips for getting more from your robot. (Download V3.3 here)(Download V4.0 here)

• Transmitter and receiver are required. If you don't have them already, you can add them with the option below. "Radio Option" includes: T6A Radio Transmitter, TR6A receiver  (-Transmitter requires 8 AA batteries.)

• The Viper can be run off a 9V battery, but for maximum competitiveness we recommend using a lipoly battery. Lipoly Battery and Charger are available as an option below. "Lipoly Option" includes: Lipoly charger, 7.4V 300mAh "Galaxy" lipoly battery"

• If you do not wish to use lipoly batteries, the Viper includes a 9V battery connector. You will then need a 9V Battery.

• An optional Programming Cable can be used to reprogram the functions on the transmitter. Viper radios come programmed for mixed driving (most common) but if you prefer tank-style 2-stick driving you will need to reprogram.
22 Product Reviews - Average rating 4.9 / 5 (Show All)

Click to review this product

The bot is awesome

- 28th November 2019

I got the bot and it took a little while to get it to work but I fried the receiver so I had to get a new one and now it is working

Great First Foray into Combat Robotics!

- 24th May 2019

Well, let me start by saying it was hell trying to actually get the robot. It was out of stock and was delayed twice, resulting in a 2+ month wait time.

However, now that it's actually here, it's fantastic. A brilliant first foray into combat robotics, and really teaches you how to the basics of electronics and engineering. I bought the horizontal spinner add-on, and this tiny little 1lb robot is legitimately terrifying at full power. Considering buy another one for my young sister to play with and fight each other.

One downside, it's ridiculously difficult to put the snap rings onto the wheel hubs. Once they were broken in, it became much easier, but that first time, I nearly quit in a swear-fueled rampage.


- 24th March 2019

Totally new to combat robotics. This was easy to build and, paired with the spinner, worked pretty well. There were some issues at first but we were able to fix them.

Absolutely worth the money

- 01st January 2019

My 9 year old son got one for his birthday and we built it together. I think it is absolutely worth the money and a great starting point. Did ok in competition easy to put back together. I recommend it.

A speedy way to get a bot up and running

- 01st January 2019

The Viper is a speedy way to get a bot up and running. No soldering required. My 10 year old assembled in an afternoon pretty much solo. In contrast, we've been building cardboard combat "robots" as well and as newcomers to electronics, we spend a lot of time resoldering poor connections or replacing bad parts since we didn't quite know what we were doing yet. I like how the Viper works out of the box and introduces you to the basic pieces.

Honestly the best way to get started

- 01st January 2019

I started my robot fighting career on the older version back in 2012 and got 2nd place at my first event. It is honestly the best way to get started. The kit leaves lots of room for modification.

Click to review this product

Lipoly Low Voltage AlarmLipoly Low Voltage Alarm - 7.43 CAD
• No need to worry about a lipoly battery becoming over-discharged and irreversably damaged!
• Accurate and easy to use, this Battery Monitor will give a warning buzzer when the lipoly pack drops below 6.6V (for 2S) or 9.9V (for 3S).
FingerTech 'Viper' Lifter Add-OnFingerTech 'Viper' Lifter Add-On - 60.36 CAD

• Take your Viper Combat Robot kit to the next level by adding a powerful servo-actuated lifting arm!

• Add a powerful servo and lifting arm to lift and topple your opponents.

• Mounts on the existing Viper Combat Robot

• No soldering required!

FingerTech 'Viper' Horizontal Spinner Add-OnFingerTech 'Viper' Horizontal Spinner Add-On - 58.11 CAD

• Add a vicious horizontal spinner weapon to your Viper Combat Robot!

• High-speed brushless motor and controller plus a FingerTech Blade Hub.

• Mounts on the existing Viper Combat Robot. (Requires modifying the original plastic armor, or buy a new set here: Horizontal Spinner Armor Set)

• No soldering required!

  (Blade not included. Shown with Titanium 6-inch Weapon Blade)

Add Radio Transmitter and Receiver?
Yes (+65.77 CAD)
Add Lipoly Battery and Charger?
Yes (+65.32 CAD)
Price: 198.20 CAD
150.64 USD 135.53 EUR
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