This is a prebuilt Heavy Duty ATR robot with 10 inch tires.  The Heavy Duty ATR supports each wheel shaft with two sealed ball bearings and is chain driven with a 10:15 reduction.  See the HD ATR ATR building support page for more details.  We have included everything to make it ready to run including batteries, controllers, chargers, etc.

• (Qty 1) Heavy Duty 4WD Welded Chassis 
• (Qty 1) ATR and Vectoring Robot Hardware Kit
• (Qty 2) ATR Heavy Duty Wheel and Shaft Set Pair - 10 inch pneumatic
• (Qty 4) IG42 24VDC 122 RPM Gear Motors
• (Qty 1) Sabertooth Custom Dual 10A RC Motor Driver
• (Qty 1) 2.4GHz RC Pistol Grip Controller and Receiver
• (Qty 1) Smart Charger for 6V-12V Lead Acid Battery -3A
• (Qty 2) 12V 7Ahr Lead Acid Batteries (run in series for 24V)
• (Qty 4) Electric Motor Hookup Kits
• (Qty 1) Electric Power Hookup Kit
• (Qty 1) Hardware and Electrical
• (Qty 1) Assembly and Testing

This robot is built and ready to go!   Please allow 1-2 days for packaging prior to shipment.  This robot has two functional encoders included with the motors, but they are not hooked up.  We have included a RC controller with it, but it could be replaced with a microcontroller or a larger channel radio for pan and tilt camera system, etc.  

Please contact us if you need this robot customized.  Using the 122 RPM gear motors, 10:15 chain reduction, 10 inch tires, 24VDC lead acid, the measured speed was 240 fpm. The robot is about 19.75" wide and 23" long (edge of wheels to edge of wheels).  The robot has a 3.75" ground clearance.  The total weight of the assembled robot with batteries, wheels, etc is 38 lbs.  The list below shows the current draw for different scenarios. (1st number is without extra weight / 2nd number is with 14lbs added)

• Drive straight concrete: 2.5A / 3A
• Drive straight grass: 2.5-3A / 12A
• Pivot Turn smooth concrete: 7.5A / 15-16A
• Pivot Turn rough concrete: 10A / 14-15A
• Pivot Turn asphalt: 11A / 15A
• Pivot Turn grass: 11-12A / 14-15A
• Pivot Turn carpet: 9.5-9.75A / 14-15A
• Right Turn or Left Turn Asphalt: 5.5A / 7A
• Uphill (loading dock ramp): 4.5A / 10A

The video below shows how well this robot handles most terrains and obstacles.