Build a children's tractor with an engine

What you need:

• Moped engine
• chassis
• bikes
• steering
• axles
• V-belt
• welding machine
• Lathe
• Construction steel in many dimensions

What the children's tractor can look like

• As a drive axle, you need a rigid axle that is as narrow as possible so that the children's tractor does not become unnecessarily wide. The front axle can be an old car axle that can be shortened. There must be a functioning brake at the rear.
• Do not build the frame much longer than the width is. The longer the vehicle, the more space it needs and the handiness suffers. Use a gear unit in such a way that it can still be driven via an intermediate gear. This will reduce the speed to an appropriate level.
• If possible, use the appropriate drive wheels rimswho you have fitted with winter tires. You should mount adapters on the steering axle, onto which wheelbarrow wheels can then be screwed. The steering parts must also be cut up and welded together again in the appropriate dimensions.
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• You should equip the vehicle with a two-seater bench so that a playmate can ride along. Do not forget to provide the rear wheels with sturdy mudguards so that children are not harmed by touching them.
• You should position the control elements in the same way as is usual in vehicle construction. Install the brake on the right and the clutch on the left. The gas can also be operated with a hand lever. All levers must be within easy reach of the child.


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Drive with the engine, but how?

An electric drive is hardly an option for reasons of cost. The drive of a hospital elevator would have to be available for this. Therefore, the use of a small gasoline engine, such as a moped, is discussed.

• First of all, you need the engine Position so that the drive levels fit together. So a lawnmower motor would have to be if you couldn't use a bevel gear. To calculate How big the gear ratios need to be on the additional gear so that the desired speed is achieved.
• Prefer V-belts as power transmission. They are elastic and low-noise, plus they are maintenance-free. All rotating parts, including the hot parts on the engine, must be safely covered. Depending on the age of the driver, you can do without a gear change or you can fix the appropriate gear.
• A slip clutch with the V-belt, for example, can be used as a coupling element instead of a gearbox. The belt is relaxed when idling and is pressed on with a roller that is under spring tension. The driver relieves the pressure with the clutch pedal and the vehicle stops.

It goes without saying that such a "toy" may only be used under supervision and under no circumstances in public traffic areas. You are responsible for the functioning of the safety precautions and the child, as the driver, must be able to control the child's tractor safely.