![]() ![]() NASA does not plan to replace Helios, but expects to build a follow-on vehicle under a new five-year, $100 million UAV technology programme. Flight tests of the smaller Pathfinder Plus at NASA Dryden later this month will include low-altitude flights in turbulence to gather data on aircraft response for use in developing better analysis tools. This concentrated loads at three points along the span.īehaviour of the modified configuration in turbulence was not adequately modelled, says NASA, and a check flight of the modified Helios two weeks earlier encountered none of the normal turbulence. For long-endurance flights, however, a non-regenerative fuel-cell power system weighing 520lb (235kg) was installed in the centreline pod and two 82kg hydrogen tanks mounted under the outboard wing panels. This category contains only the following page. In its original configuration, in which Helios set an altitude record of just under 97,000ft (29,500m) in 2001, the aircraft was a spanloader, says NASA, with loads distributed along its span. The propeller-driven Helios exceeded its design speed, causing the leading-edge secondary structure on the outer wing panels to fail and upper-surface skin and solar cells to rip off. Island-induced circulations and turbulence are pos-sible factors for the crash of the solar-powered aircraft Helios lee of Kauai on 26 June 2003 Lane et al. The highly flexible flying wing encountered normal turbulence that produced unexpected, persistent upward bowing of the wing, which caused the aircraft to become unstable in pitch. Educational video created by NASA.'This video segment explains how NASAs Helios aircraft operates and why it is a better alternative to satellite technology. The AeroVironment-built Helios prototype broke up soon after take-off from Kauai, Hawaii on 26 June, 2003. NASA's Helios solar-powered remotely operated aircraft crashed into the Pacific in June last year because available analysis methods were unable to predict the vehicle's increased sensitivity to atmospheric turbulence after modification with a fuel-cell system for an attempted 40h long-duration flight. Due to the technical constraints of the rechargeable battery, the HSA must carry sufficient batteries to meet the flight power. Airline Business special: CEOs to watch in 2021 Making use of solar energy to fly is an up-and-coming technology in the human aviation field since solar energy is renewable and inexhaustible, and more and more attention and efforts have been directed to the development of high-altitude solar aircraft (HSA). A relatively new acronym in the aerospace sector is HAPS, which stands for high-altitude platform station or high-altitude pseudo satellite (the terms are synonymous).FlightGlobal Guide to Business Aviation Training and Safety 2021.EDGE: A new global force in aerospace and defence.Shell Aviation: What will it take to Decarbonise Aviation?.What does the future of aviation look like in 2022?.Guide to Business Aviation Training and Safety 2022.What will it take to Decarbonise Aviation?.Guide to Business Aviation Training and Safety 2023.Airline Business Covid-19 recovery tracker.
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