The original Bölkow BO 209 "Monsun" was built around 1970, with almost exactly 100 copies being manufactured. As long as I can remember, Graupner always had at least on model in their catalog, from a small free-flight, rubber-powered variant to larger R/C types.
This model is based on a plan of the older 1973 Graupner kit for a 40-sized model.While the kit included foam-core wings, the rebuild has traditional ribs-and-spars balsa wings.
| Wingspan | 1.5m |
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| Length | 1m |
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| Weight | 2180g (kit used to be 2700g) |
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| Motor | AXI 2816/12 V2, kV 760 |
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| Battery | 4S 3000mAh LiPo |
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| Prop | 12x8 |
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| Max current | 40 Amp |
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First flight: Evening of April 1, 2018.
Initial cockpit detail.
Special challenge in the rebuild were the bubble canopy and the motor cowling, which were vacuum formed. Above is example of the wooden cowling plug used to pull the cowling.
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