![An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft, An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft,](https://l450v.alamy.com/450v/2ggbp0m/the-model-4x-engine-was-built-by-the-roberts-motor-company-of-sandusky-ohio-an-important-design-objective-was-light-weight-which-was-achieved-through-the-extensive-use-of-aluminum-and-magnesium-alloys-in-the-cylinders-and-crankcase-and-a-hollow-crankshaft-also-like-all-roberts-engines-it-operated-on-a-two-stroke-cycle-operation-to-reduce-parts-count-between-1911-and-1912-roberts-engines-were-used-by-many-noted-exhibition-pilots-and-more-roberts-engines-were-said-to-be-built-than-by-hall-scott-and-curtiss-combined-during-this-period-this-engine-artifact-was-manufactured-about-1911-and-2ggbp0m.jpg)
An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft,
Des Roberts Motor Cycle Performance - Motorcycle Parts & Accessories Retailers Unit 120 193 Southpine Rd, Brendale QLD 4500 | Yellow Pages®
![An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft, An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft,](https://c8.alamy.com/comp/2GGBNRD/an-important-objective-of-the-roberts-motor-company-design-was-light-weight-which-was-achieved-through-the-extensive-use-of-aluminum-and-magnesium-alloys-in-the-cylinders-and-crankcase-a-hollow-crankshaft-and-two-stroke-cycle-operation-to-reduce-parts-count-between-1911-and-1912-roberts-engines-were-used-by-many-noted-exhibition-pilots-and-more-roberts-engines-were-said-to-be-built-than-by-hall-scott-and-curtiss-combined-this-engine-was-purchased-by-oscar-r-solbrig-of-davenport-iowa-to-power-the-curtiss-type-pusher-aircraft-he-built-in-1911-12-solbrig-who-had-received-aviation-tr-2GGBNRD.jpg)
An important objective of the Roberts Motor Company design was light weight, which was achieved through the extensive use of aluminum and magnesium alloys in the cylinders and crankcase, a hollow crankshaft,
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