Hal 'Pappy' de Bolt (1918-2005) had a remarkable passion for aeromodelling, and his lifelong list of achievements and contributions as designer, manufacturer, author, competitor and contest director is absolutely mind-boggling. His influence and innovations have touched all branches of model aviation, including free flight, control line and R/C. For example, did you know that strip ailerons, clunk fuel tanks and the first electric power servo for R/C were developed by Hal de Bolt?
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机译：Hal'Pappy'de Bolt（1918-2005）对航空建模有着非凡的热情，他作为设计师，制造商，作家，竞争对手和竞赛总监一生的成就和贡献一览无余。他的影响力和创新触及了模型航空的所有分支，包括自由飞行，控制线和遥控。例如，您知道哈尔·德博尔特（Hal de Bolt）开发了带状副翼，笨拙的燃油箱和首个用于R / C的电力伺服系统吗？
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