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by snovv_crash
1414 days ago
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It needs a high pressure rail with fuel pump, electronic injection and ignition control. This adds considerably to the cost, which when you take it into the engineering optimization problem, starts pointing to electric plus batteries for these small sizes. You need about 100cc before it makes sense to start looking for fuel engines, or some application that requires really high energy density for long endurance at light weight (eg. surveillance drones). |
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