Siemens: World-record electric motor for aircraft

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Siemens researchers have developed a new type of electric motor that, with a weight of just 50 kilograms, delivers a continuous output of about 260 kilowatts – five times more than comparable drive systems. The motor has been specially designed for use in aircraft. Thanks to its record-setting power-to-weight ratio, larger aircraft with takeoff weights of up to two tons will now be able to use electric drives for the first time. To implement the world-record motor, Siemens' experts scrutinized all the components of previous motors and optimized them up to their technical limits. New simulation techniques and sophisticated lightweight construction enabled the drive system to achieve a unique weight-to-performance ratio of five kilowatts (kW) per kilogram (kg). The electric motors of comparable strength that are used in industrial applications deliver less than one kW per kg. The performance of the drive systems used in electric vehicles is about two kW per kg. Since the new motor delivers its record-setting performance at rotational speeds of just 2,500 revolutions per minute, it can drive propellers directly, without the use of a transmission.

http://www.siemens.com/press/en/feature/2015/corporate/2015-03-electromotor.php?content[]=Corp

http://www.tu.no/industri/2015/04/02/siemens-lanserer-ny-elmotor-for-fly---med-rekordytelse
 
Man sparer iallefall vekten av brennstoff, Siemens pästär at gearboks er heller ikke nödvendig. Til gode (for et 5-pax fly ?) har man derved minst 800-1,200 kg, delta motorvekt innregnet ... Her trengs det en god O2-H2 til H2O e-celle. Samt noen avanserte batterier ? Videre trengs det nye piezo-materialer (som omgjör luft-friksjon til Volt) til vinge- og skrog-overflater ?
 
Et 5-pax fly (Cessna 421 for å ta i litt, men vi kan også si en Seneca, som er et seksseters fly) vil med dagens teknologi kreve batterier som er myyye tyngre enn 8-1200 kg. Tar man bort begge motorene og fuel sparer man kanskje rundt 800 kg, men man vil trenge en anselig mengde batterier for å kunne fly like lenge som med fulle tanker. Det er enda lenge til brukbare batterifly - og da mener jeg brukbar som i lik eller bedre rekkevidde og performance som med dagens motorer.
 
En e-celle (Pile à Combustible) produserer ström til de nye elektriske motorene etter bruks-behov, la oss si e-cellen dimensjoneres til cruise-forhold, mens batteriene tar händ om sikkerheten og overbruk v/akselerasjoner osv, samme som for en Tesla - oder ?
 
“Faster, Higher, Stronger” – the official motto of the Olympic Games since 1924 – now also applies to the Extra 330LE aerobatics airplane. The plane is equipped with an electric drive system from Siemens that has a continuous power output of 260 kilowatts, weighs only 50 kilograms, and thus offers an unprecedented power-to-weight ratio. The aerobatics plane has now set a world record in ascent: the pilot reached an altitude of 3,000 meters in only four minutes and 22 seconds, beating the previous record by more than one minute.
https://www.siemens.com/innovation/...electric-aircraft-record-altitude-flight.html
 
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