Build your own Roman Onager with TrebuchetStore.com detailed, easy to follow plans and instructions. When built, this Roman Onager stands 12"  inches tall  in the fired position and will throw a scale projectile up to 50 feet.

The most powerful artillery piece in the Roman arsenal and a direct descendent of the Mangonel , the sling equipped Onager took its name from the Persian Wild Donkey, because of its powerful "kick" when fired.

Perfect for demonstrating Roman Warfare and technology, this easy to build torsion catapult uses common, inexpensive and easy to find building materials, all available at your local home improvement store. 

This complete plans package includes a shopping list of materials,  measured drawings for all parts, step-by-step assembly drawings and instructions, as well as firing and tuning instructions.
 
 

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2-Plan Deal 2 Plans 1. Select Plan # 1 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 2. Select Plan # 2 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1

3-Plan Deal 3 Plans 1. Select Plan # 1 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 2. Select Plan # 2 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 3. Select Plan # 3 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1

4-Plan Deal 4 Plans 1. Select Plan # 1 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 2. Select Plan # 2 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 3. Select Plan # 3 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 4. Select Plan # 4 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1

6-Plan Deal 6 Plans 1. Select Plan # 1 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 2. Select Plan # 2 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 3. Select Plan # 3 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 4. Select Plan # 4 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 5. Select Plan # 5 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1 6. Select Plan # 6 Mangonel Catapult Plan MP1 Roman Onager Plan OP1Medieval Trebuchet Plan TP1Tennis Ball Trebuchet Plan TP2Golf Ball Trebuchet Plan TP3Stirling Trebuchet Plan TP4DaVinci Trebuchet Plan TP5Highland Trebuchet Plan TP6Statistical Catapult Plan CP1Roman Ballista Plan BP1