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Hempel 60 Percent Extra 260 Giant Scale
If you're familiar with AMA rules you know that any model aircraft weighing over 55 pounds requires an exception to "legally" fly on an AMA certified field. To get this exception, you have to complete two certification flights with a designated inspector. This is the story of one pilot going through the process with his Giant Scale (60%) Bill Hempel ARF.
![H*U*G*E radio controlled YAK 54 plane [*UltraHD and 4K*]](https://i.ytimg.com/vi/CMtWgHVHNJ8/mqdefault.jpg)
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