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Electric plane at Paris Airshow
On Tue, 14 Jul 2015 08:23:23 +1200, george152 wrote:
The current toy evidently 'cooked' a number of the onboard batteries during its 'record breaking' Japan-Hawaii leg Apparently the battery damage is worse than originally thought. I recall some issues with the Li-ion batteries in early production Boeing Dreamliners and Tesla cars. It's all part of the learning curve I suppose. I'm unaware of an subsequent battery issues with those products. Here's the latest update from Solar Impulse: ------------------------------------------------------------------------------- Subject: RTW update 23 - BREAKING NEWS - No #Si2 flights before 2016 From: Solar Impulse Date: Wed, 15 Jul 2015 11:13:11 +0000 SOLAR IMPULSE RTW UPDATE #23 ------------------------------------------------------------ NO flight BEFORE 2016 IRREVERSIBLE DAMAGE TO OVERHEATED BATTERIES IN SI2 PUSHES THE SECOND HALF OF ROUND-THE-WORLD SOLAR FLIGHT TO EARLY SPRING 2016. Despite the hard work of the team to repair the batteries which overheated in the record breaking oceanic flight from Nagoya to Hawaii, Si2 will stay in Hawaii until early Spring 2016. During the first ascent on day one of the record-breaking oceanic flight from Nagoya to Hawaii, the battery temperature increased too much due to over insulation of the gondolas. And while the Mission team was monitoring this very closely during the mission leg, there was no way to decrease the temperature for the remaining duration of the flight as each daily cycle requires an ascend to 28’000 feet and descend for energy management issues. Irreversible damage to certain parts of the batteries will require repairs which will last several months. In parallel, we will be studying various options for better cooling and heating processes for very long flights. The University of Hawaii with the support of the Department of Transportation will host the airplane in its hanger at Kalaeloa airport. Post maintenance check flights will start in 2016 to test the new battery heating and cooling systems. |
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