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Heavy duty

机译：重负

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摘要

Industry must wrestle with widely varying fuel grades and evolve a mature systems engineering approach if it is to realise the potential of heavy fuel engines for Small UAVs. Decades of R&D into UAV heavy fuel engines (HFE) of about 1-20hp have so far yielded few operational systems, and some industry experts have described those that have been deployed as merely research projects. One such source commented that for many years the industry has been one of smoke and mirrors, 'with many people claiming to be able to run on heavy fuel, only to have some caveat in order to do so,' he said. 'Many engines have quite a few flight hours now but are constrained in some way, for example not being able to cold start without external aids or start fuels.'
机译：为了实现小型无人机的重型燃料发动机的潜力，工业界必须努力解决各种燃料等级问题，并发展成熟的系统工程方法。迄今为止，数十年来一直在研发约1至20马力的无人机重型燃料发动机（HFE），产生了很少的操作系统，并且一些行业专家将这些系统描述为仅仅是研究项目而已。一位这样的消息人士评论说，该行业多年来一直是烟雾和镜子中的一种，“许多人声称能够使用重油运行，但这样做只是需要告诫，”他说。 “许多发动机现在有几个小时的飞行时间，但是在某种程度上受到了限制，例如在没有外部辅助工具或燃料的情况下无法冷启动。”

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