F5D 就是电动竞速机。
5.5.6. CLASS F5D - ELECTRIC POWERED PYLON RACING MODEL AIRCRAFT
5.5.6.2 Technical Specifications
a) Model Aircraft
Minimum weight ready to fly: 1,000 g 最低全重
Maximum surface loading 65 g/dm2 最大翼面载荷
b) Battery 电池
Battery Type: Lithium-Polymer
Minimum weight of battery pack: 200 g 最小重量
Maximum weight of battery pack: 400 g 最大重量
The weight of battery includes soldering, insulation, cables and connectors.
Number of cells in serial connection: up to 5 (S) 最大电压
Cells in parallel are not permitted. 不允许串联
后面还有很多规则
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