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    effect. The company claims an Oswald efficiency number of 1.45 for its boxwing design. Other claims include increased efficiency, 30% lower weight, reduced...
    35 KB (4,202 words) - 08:59, 30 October 2024
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    Schulz, Dieter. "The complete history of the Sunny-Boxwing by Tandem Aircraft KG". www.sunny-boxwing.de. Retrieved 24 April 2018. "Airkraft". Internet...
    7 KB (504 words) - 19:21, 13 April 2023