Wingspan to engine’s capacity ratio

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        General rules which define the ratio of model’s wingspan to engine capacity, are being followed by almost every manufacturer nowadays. For aerobatic models such as:

        S-bach,

        Extra,

        Edge,

       Cap,

       the ratio according to various manufacturers is as follows:

Wing span (cm)

Engine’s capacity (cc)
180

20 – 30

200

50
220

45 – 60

230

50 – 70
240

60 – 80

260

80 – 100

300

150 – 170

      The same rules apply to Giles and Sukhoi which have slightly shorter wings compared with the above.

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