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jean.caissepas
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A 15 kg aircraft engine developing 200 kW!

by jean.caissepas » 12/11/20, 17:25

3x lighter than previous models!

Video:


source: https://www.futura-sciences.com/science ... ces-84149/
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Exnihiloest
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Re: A 15 kg aircraft engine developing 200 kW!

by Exnihiloest » 12/11/20, 18:33

Electric motors have always been very powerful in relation to their volume and weight, and progress continues on these points (because for efficiency we are already at the top, some exceeding 95%).
On the other hand, if we add the weight of the on-board energy including its containers, such as batteries, there we have an unfavorable weight / energy ratio for electricity compared to kerosene. That will change but currently it is still so.
Power says nothing about energy. I have tiny DSD diodes capable of delivering 1KW. But it is for less than 1 µs.
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Re: A 15 kg aircraft engine developing 200 kW!

by izentrop » 13/11/20, 02:33

Exnihiloest wrote:I have tiny DSD diodes capable of delivering 1KW. But it is for less than 1 µs.
There are also commonly found mosfets capable of switching 162 A continuously. I have some IRF1404 in my drawers. ;)
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Re: A 15 kg aircraft engine developing 200 kW!

by Christophe » 13/11/20, 12:56

As already said an electric motor alone is useless ...

Let's talk a little, let's talk well, in aero for an engine developing 200kW you need a battery of at least 100 kWh to guarantee an "acceptable" autonomy, including safety reserve (i.e. 30 min. Of flight with the safety reserve) ...

100 kWh at present, at 0.2 kWh / kg it is 500 kg ...

The weight of the energy system would therefore be 515 and the 15kg engine only represents 3%

Making a lighter engine is good, making lighter batteries is better ...
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Re: A 15 kg aircraft engine developing 200 kW!

by Exnihiloest » 13/11/20, 21:56

izentrop wrote:
Exnihiloest wrote:I have tiny DSD diodes capable of delivering 1KW. But it is for less than 1 µs.
There are also commonly found mosfets capable of switching 162 A continuously. I have some IRF1404 in my drawers. ;)

Ah, a connoisseur!
An IRF1404 is what one could not even imagine in a dream in the days of AC126 or AF116. If you know them, you will have been able, like me, to assess the phenomenal progress in the electronics industry, it is astounding. If the mechanical industry had progressed so much, we would already be colonizing Alpha Centauri. :)
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Re: A 15 kg aircraft engine developing 200 kW!

by izentrop » 13/11/20, 22:49

Exnihiloest wrote:If the mechanical industry had progressed so much, we would already be colonizing Alpha Centauri.
I don't think so, electronic progress has allowed changes in the precision of measurements, in telecommunications and in the optimization of weight, but when it comes to propulsion, the fuels are always the same and not sure that we can exceed speeds. current.

When I started working, it was on tube radios, so the AC126, AC127 I knew too. I repaired gear like this https://sites.google.com/site/radiof5bzx/home/an-grc9, PP11, PP13 ...
I stop, we get off topic :P
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Re: A 15 kg aircraft engine developing 200 kW!

by Exnihiloest » 16/11/20, 18:32

izentrop wrote:
Exnihiloest wrote:If the mechanical industry had progressed so much, we would already be colonizing Alpha Centauri.
I don't think so, electronic progress has allowed changes in the precision of measurements, in telecommunications and in the optimization of weight, but when it comes to propulsion, the fuels are always the same and not sure that we can exceed speeds. current.

By "mechanical industry" I meant not only mechanics, but also the propulsion processes and the energy sources to make them work.
When I started working, it was on tube radios, so the AC126, AC127 I knew too. I repaired gear like this https://sites.google.com/site/radiof5bzx/home/an-grc9, PP11, PP13 ...
I stop, we get off topic :P

I also knew the lamps and built TX with them, since the powerful HF transistors, we did not have them yet, or later but too expensive!
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