R/C Tank Combat

Tank #T078

Index   Edit

 |< << Page 4 of 7 >> >| 


Click Photo For Enlargement (211 Kb)
 
Two lengths of angle Iron were drilled together and had short pieces of 14mm mild steel tube to act as simple bearings welded along its length, then cut down the center to leave two identical handed bearing brackets. Also in this picture, the motor mounts are in the design stage.

Each bracket was then bolted to the hull. The swing arms fitted in to each hole and were secured into secondary bearings mounted inside the hull (not shown).
 

Click Photo For Enlargement (225 Kb)


Click Photo For Enlargement (41 Kb)
 
Track return rollers were constructed. The back suspension mounts have a shock absorber designed for a small quad bike. these shocks take nearly all the weight of the driver , so I either require loosing some weight or buy bigger shocks. Can you spot the seat?

Each wheel is suspended by a spring fixed to the hull by an adjustable eye bolt.A fin is welded to the swing arm and attached to the spring providing adjustable lift. A bracket under each swing arm limits the wheels swing at a max low position.
 

Click Photo For Enlargement (69 Kb)


Click Photo For Enlargement (72 Kb)
 
Testing :-Driving over a lump of 10X4" at full speed gives the tank a good testing, The drive motor sprocket was changed from a 21 tooth to a 16 tooth.this gave better torque with very little change in speed. I think Im over working these little motors. I then changed the sprocket connected to the drive wheel from a 21 tooth to a 30 tooth. again only a little loss of speed but the tank can now preform zero turns on concrete.

I spotted a little damage on one side of the idler wheels, I was a little alarmed until I saw the other idler wheel :-
 

Click Photo For Enlargement (87 Kb)


Click Photo For Enlargement (105 Kb)
 
I think my tank is eating its self. What works fine in 1/6th doesn't work so well in 1/3rd.

The solution can from a man called Dave Manson, a very good engineer who builds excellent 2/5th tanks and goes to the trouble of sharing his ideas and methods in youtube tutorials. these wedges are made from 1.5mm thick 30x15mm mild steel tubing cut at 15 degrees.
 

Click Photo For Enlargement (82 Kb)


Click Photo For Enlargement (128 Kb)
 
160 of the little fellers are required.

more buckets require filling full of tank components. Each track guide requires crimping to form a wedge in the other direction to ease contact with the wheels. I`ll post progress as its made.
 

Click Photo For Enlargement (98 Kb)

 |< << Page 4 of 7 >> >|