[Cad] [motors, power ee, & evs] (Siemens) Electric aircraft: World-record (50kg:260 kW contiunuous) electric motor makes first flight. also, electric dirigibles from 1885?!

Tue Jul 12 02:48:52 EDT 2016

The batteries though. The batteries are what makes it super hard
<http://www.mh-aerotools.de/company/paper_14/MP-AVT-209-09.pdf>.

On Tue, 12 Jul 2016 at 16:31 Nancy Ouyang <nancy.ouyang at gmail.com> wrote:

> www.siemens.com/press/electric-aircraft
>
> *"This is the first time that an electric aircraft in the quarter-megawatt
>> performance class has flown."*
>
>
> https://www.youtube.com/watch?v=fiu8TFnXYFY
>
> In a big leap for the electrification of aviation, an Extra Aircraft
>> aerobatic plane performed its maiden flight with an electric powertrain.
>> The crucial component was a world record motor from Siemens. Weighing a
>> mere 50 kilograms, the motor has an output of 260 kilowatts, resulting in
>> an unparalleled power-to-weight ratio.
>
>
> Datasheet:
> http://www.siemens.com/press/pool/de/feature/2015/corporate/2015-03-electromotor/factsheet-erstflug-weltrekordmotor-d.pdf
>
>
>
> https://transportevolved.com/2016/07/08/siemens-showcases-brand-new-electric-motor-thats-super-light-super-powerful-and-perfect-for-electric-airplanes/
>
>> Of course, electric motors have long been used in model planes, but their
>> use outside the 1:14th scale aeromodelling arena has been somewhat
>> limited due to the mechanics of making a sufficiently large, powerful, &
>> lightweight electric motor. And while we’ve seen some very successful
>> electric planes take to the sky, most have been custom-made,
>> super-lightweight affairs which while impressive, have yet to make their
>> mark on a wider scale.
>
>
> Many of the benefits of electric motive power for aircraft are ones that
>> any EV driver will be familiar with: quieter, lower maintenance, greater
>> efficiency. Benefits that are shared with the community too in this case –
>> as with increasing air travel areas around airports have become
>> increasingly polluted – both by noise and by noxious residues from burning
>> fossil fuels.
>>
>
>
>> But there are also other benefits that are deeply exciting for
>> aeronautical engineers and pilots.
>
>
>
>
>> Unlike fossil fuel powered engines, electric motors really don’t care
>> which way is up. They operate the same upside-down as they do the right way
>> up — they don’t stall and fuss with fuelling issues when you turn them
>> over. They also perform the same at 40,000 feet as they do at 4 feet.
>> Traditional engines require complex mixture and timing adjustments to keep
>> them performing well in the thin atmosphere in which they spend much of
>> their lives.
>
>
> about the airplane,
>
>> Based on a thoroughly modern, but not deeply exceptional structure – with
>> a mixture of a steel fuselage and carbon fibre wings, the Extra is itself a
>> popular aerobatic model
>
>
>
>> The Extra 330LE, which weighs nearly 1,000 kilograms, serves as a flying
>> test bed for the new propulsion system. As an aerobatic airplane, it's
>> particularly well suited for taking the components to their limits, testing
>> them and enhancing their design.
>
>
> the future
>
>> Electric drives are scalable, and Siemens and Airbus will be using the
>> record-setting motor as a basis for developing regional airliners powered
>> by hybrid-electric propulsion systems. "By 2030, we expect to see initial
>> aircraft with up to 100 passengers and a range of around 1,000 kilometers,"
>> explained Anton.
>
>
>
> I love this anecdote about intelligent analysis tools in CAD. (*hi
> cad-discuss, that's why you're cc'd :]* )
>
> The end-shield for the motor, for example, was analyzed using a *software
>> package* that divided the component into over 100,000 elements, each of
>> which was individually further stress-analyzed and subject to* iterative
>> improvement loops.* Eventually, the custom software spat out a filigree
>> structure that weighs 4.9kg instead of the 10.5kg from the previous design.
>>
>
>
> more about the motor
> http://phys.org/news/2015-04-world-record-electric-motor-aircraft.html
>
> 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.*
>>
>
>
>> 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.*
>>
>> In the next step, the Siemens researchers will boost output further.
>> "We're convinced that the use of hybrid-electric drives in regional
>> airliners with 50 to 100 passengers is a real medium-term possibility,"
>> said Anton.
>
>
>
> this might be what the motor looks like? not sure
> https://youtu.be/j3cNLsN-eCM?t=31s
> [image: Inline image 1]
>
>
>
> about the Siemens and electric dirigibles (?!)
>
>>
>
> Siemens current motor is sufficient to power a small 4-seater aircraft by
>> itself. Indeed, it would be “quite racy” suggest Siemens in that
>> application. And Siemens is keen to point out that the motor is *nearing
>> the power requirements for small regional airliners. *Of course if
>> anyone would know about aeronautical electric motors it really ought to be
>> Siemens, given that it was its electric motor that (back in 1881) powered
>> the *first electric dirigible*
>> <https://archive.org/details/lesballonsdirig00tissgoog>*.*
>
>
> Also check out this amazing scan of an* 1885 book about electric
> dirigibles*. (archive.org's ebook software is on-point!)
> https://archive.org/details/lesballonsdirig00tissgoog
>
>> Dirigibles: application of electricity to air navigation
>
> by Gaston Tissandier
>> Published 1885
>> Book digitized by Google from the library of the University of Michigan
>> and uploaded to the Internet Archive by user tpb.
>
>
>
> Thanks,
> --Nancy
>
>    -
>
>
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