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What do you think about "e-soaring"?

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henryk

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Mar 8, 2010
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krakow,poland
Thanks for this video!
It is definitelly great that Greg Cole is promoting electric motorgliders :)
Electrically "sponzored" L/D is planned part of flight tests we want to do in about 2 weeks.
Recuperation is not that easy as it looks like - electric motor in generator mode has lower efficiency.
This will take some research ideally done in cooperation with controller and electric motor producers.
Best regards!
Martin
-much better recuperation efficiancy we can got from FLEYWHEL kinetic energy
accumulator (superwflywheel + supervariator )...=prof Gulia works!
 

John.Roo

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Oct 8, 2013
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Letohrad / Czech Republic
Hello Henryk,
I am affraid that flywheel kinetic energy system is too heavy for airplane + there is a problem with safety.
Imagine heavy high RPM gyroscope during crash landing...

The dream about recuperation from thermals (lifts) is very nice, however to be realistic, for typical cruise flight will be probably necessary to have some generator based on combustion engine.
I am very surprissed that after many years are no simple solutions available.

Looks so easy...
http://sustainableskies.org/e-genius-extends-range/
However... seems that it doesn´t work.
e-Genius team is looking for different hybrid solution.

Data from Equator aircraft
https://equatoraircraft.com/aircraft.html
•ENGINE: ENGIRO M97 Electric (97 kW water cooled, 32 kgs)
•GENERATOR: ENGIRO G60 (60kW, water cooled, 15kgs)
•ICE: WST KKM 352 Wankel (57kW) Multi Diesel (45kgs)
•Boost Battery: Custom LiIon pack (6kWh) 32kgs
•Test Battery: LiPo pack (18kWh) (separate BMS), 100kgs
Will be interesting to see this system in the air.

I hope that soon we will have some news about Great Air Race.
https://greatairrace.com.au/
I would like to know what teams and airplanes are represented in 4 main categories.
To cross 700 km above the sea is necessary to have really reliable propulsion system.

Best regards!
Martin
 

Vigilant1

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US
E kin=0.5*J*(omega)^2

J=m*r^2 (for ring flywhel)

=small weight (composites=NOT danger iff collision), very high RPM =big accumulated energy,
allmost 100 % efficiancy, no problems with ecology...

https://www.slideshare.net/vlas_strigunenko/combarco-2012-eng0512?next_slideshow=1

=supervariator...

https://www.youtube.com/watch?v=DMXyzsEDDLk

=1974=probably the World first "KERS"...
Yes, I remember a prototype flywheel kinetic storage unit for cars. The flywheel was relatively light composite spun very fast, inside a vacuum enclosure. In case of an accident, the enclosure ruptured and the flywheel itself broke into harmless light strands due to air pressure.

A challenge in aircraft would be the very high resistance to movement perpendicular to the flywheel axis. Maybe putting the whole thing in a gimballed mount so it could self-adjust into the orientation of least resistance.
Mechanical complexity would be reduced (a lot) if the flywheel was used to make electricity rather than being used directly to drive a prop.
 
Last edited:

John.Roo

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Oct 8, 2013
Messages
403
Location
Letohrad / Czech Republic
Hello!
I can understand why to use the "KERS" system in cars. However I still miss the point why to have this system in airplane :)
In car - especially in the city - you need to stop and start (or slow down and accelerate) very often.
But that is not typical situation during flight :)

I was thinking about somethink like this
https://www.mahle-powertrain.com/en/experience/mahle-compact-range-extender-engine/
Only in "aeronautical version" with less weight...

Best regards!
Martin
 

henryk

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Joined
Mar 8, 2010
Messages
5,353
Location
krakow,poland
Hello!
I can understand why to use the "KERS" system in cars. However I still miss the point why to have this system in airplane :)
In car - especially in the city - you need to stop and start (or slow down and accelerate) very often.
But that is not typical situation during flight :)

I was thinking about somethink like this
https://www.mahle-powertrain.com/en/experience/mahle-compact-range-extender-engine/
Only in "aeronautical version" with less weight...

Best regards!
Martin
-You are right, KERS in flying device is not efficiant,
but Range Extenders too ="Additional mass added to vehicle < 400 kg"...

-combination=ICE +supervariator +superflywheel seems better weight/power/energy proportion.

BTW=flywheel NOT steal or Pb, BUT silicon,bor rowings (high strength/weight !)
 

John.Roo

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Joined
Oct 8, 2013
Messages
403
Location
Letohrad / Czech Republic
Exactly - problem is weight and efficiency...
I was dreaming about ICE generator with 8-10kW of output power.
Small, light, simple.
Would be possible to "survive" lower efficiency if system is removable.
To be used only for long cross country flights.

Just dreaming.
Like other development teams...

csm_HP_elfinSlider04.jpg

egenius-pod_2-528x297.png

keechdesign-rex-highres-01.jpg
 

copec

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Aug 2, 2015
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Santa Clara, UT
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