| 词条 | Draft:Perimeter Hybrid Electric Drone |
| 释义 |
The Perimeter Hybrid Electric Drone (Perimeter UAV, formerly the Tailwind UAV) is a small unmanned hybrid electric aircraft manufactured by Menlo Park, California based Skyfront Corp. The Perimeter is a multirotor drone that is equipped with either 4 or 8 electric motor-propeller pairs. Because it is gas powered, the Perimeter has an extended flight endurance five to ten times that of battery powered multirotor drones[1]. ConceptThe Perimeter is powered by a hybrid-electric power source that converts gasoline into electricity. The primary mover is a two-stroke gasoline engine that spins a three-phase brushless electric motor that generates electricity. Because the energy density of gasoline is over 100 times that of lithium ion batteries[2], the Perimeter can achieve flight times in excess of four hours[1]. The Perimeter uses a two stroke instead of a four stroke engine because two strokes generally have a higher power-to-weight ratio. A battery is connected in parallel to provide boost power and reserve power in case of engine failure. References1. ^1 {{Cite web|url=https://www.unmannedsystemstechnology.com/2017/09/skyfront-sets-new-multirotor-drone-flight-record/|title=Skyfront Sets New Multirotor Drone Flight Record|date=2017-09-21|website=Unmanned Systems Technology|language=en-US|access-date=2019-01-02}} 2. ^{{Cite web|url=https://www.aps.org/publications/apsnews/201208/backpage.cfm|title=Has the Battery Bubble Burst?|last=Schlachter|first=Fred|date=August 2012|website=www.aps.org|language=en|archive-url=|archive-date=|dead-url=|access-date=2019-01-02}} |
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