What do you think about "e-soaring"?

[henryk]

23 kg thrust, 13 kW out-runner motor, 3.3 kg weight.

2 kG/kW =not bad !

 

[opcod]

The main and easy method to know is the asw27 with the 2 jet engines. No matter what type, at 131lbs you takeoff. And the asw27 is quite heavy by itself. Also, i<m not saying the glider will be efficient. But mission is takeoff to max 2k then glide back home. If flight line is empty and good condition.. unscrew the fan and take off by the tow. But it should cut the ratio not much more than a tricyle wheel system.
/Martin, On the wingspan.. yes, a 17m version possible ?

 

[John.Roo]

I beleive that with 2 jet engines with 131 lbs / 600 N thrust you probably can takeoff. ASW 27 MTOM is 500 kg, but EW starts from 245 kg. It is not really "ultralight" glider, but you will probably not use water ballast in case of self launch tests

For 17 m version we have finished wing extesion models and I am planning how to produce the set of moulds for first "flight testing" set.

Idea is to have possibility to change the wing extensions according to "flight mission"
- 10,3 m span - no extensions - parking in hangar
- 10,6 m span - short winglets - higher wing load, high maneouvrability
- 15,0 m span - long economical cruising, aerotowing
- 17,0 m span - soaring

 

[John.Roo]

That day during morning we did glider aerotows with Phoenix and than we used free time for some fun flying - "formation ridge soaring" And because boys in Taurus had selfie stick aboard...

 

[henryk]

formation ridge soaring

=E-soaring +...

 

[John.Roo]

Nice motivation to fly / drive electric

 

[John.Roo]

But far best motivation to fly is here.....

I definitelly love this video.
And my dream is to meet Indiana Jones personally

 

[Speedboat100]

I like this scene:

 

[John.Roo]

Place where I learned to fly in mountains....

 

[henryk]

where I learned to fly in mountains....

=Sebastian Kawa a teacher ?

=triangle 300 km=2 h... NO engine !

http://www.sebastiankawa.pl/wp-content/uploads/2014/08/OLA984501.jpg

-kiss me quick...

 

[John.Roo]

I met Sebastian in St. Auban
And I flown with Sebastian in Phoenix in CR.
He is gliding legend, like for example Klaus Ohlmann etc.

My "teacher" was another gliding legend - Rene Fontin

 

[henryk]

another gliding

http://bkb.koendu.pl/doc/Wolf%20OSCILLATING%20WING%20PROPULSION.pdf

=very energy efficient methode of wing propulsion...

=not efficient,but...KASPERWING

 

[henryk]

+ DYNAMIC soaring in athermic,gusty wheaser...

http://koendu.pl/doc/Flight%20Testing%20the%20Bekas%20N_Witold%20Kasper.pdf

=pp.13/14 .

 

[John.Roo]

Birdy 120 kg...
Interesting project.

120-Kilo-Klasse: Birdy startet zum Erstflug

Der Elektro-Segler Birdy ist mit nur 120 Kilogramm Leermasse der Gegenentwurf zum klassischen, zertifizierten Segelflugzeug. Nach zweijähriger Entwicklungszeit hob das dank Elektroantrieb eigenstartfähige Flugzeug am 7. August zum Erstflug ab.

www.aerokurier.de

From the Aerokurier article seems that expected price for a KIT is 50 000 EUR (incl. electric propulsion).
Technically I am only a bit worry about reliability of the long shaft between prop and electric motor, but true is that power is only 12-16 kW.

By the way...
It is interesting that in Germany they measure EW of electric airplanes in 120 kg category without battery

 

[henryk]

the long shaft between prop and electric motor,

-probably for propeller/tail interferency lowering...( noise problem) ?

 

[John.Roo]

Just thinking.... (again about prices)
50 000 EUR for KIT of Birdy (electric self launch)
45 200 EUR price of SWIFT (electric self launch)
89 500 EUR basic price of Archaeopteryx (electric version)
65 000 EUR Silent Electro (price info from 2013)
? GP gliders (electric self launch)
? ATOS Wing
...
They all are interesting (performance, design, idea, weight...).
But can we call that "affordable?

 

[henryk]

? GP gliders (electric self launch)

"
Base price in Euros excluding VAT:

GP11 Pulse 43,000

GP14 Velo 82,900

GP15 Jeta 93,900

"

 

[henryk]

"
Pipistrel Velis Electro got a Price the Plane of the Year
"
from Plane&Pilot Magazine ...

Pipistrel Velis Electro z nagrodą Plane of the Year

Elektryczny samolot Pipistrel Velis Electro otrzymał nagrodę Plane of the Year 2020 przyznawaną przez Plane&Pilot Magazine

dlapilota.pl

 

[Speedboat100]

Just thinking.... (again about prices)
50 000 EUR for KIT of Birdy (electric self launch)
45 200 EUR price of SWIFT (electric self launch)
89 500 EUR basic price of Archaeopteryx (electric version)
65 000 EUR Silent Electro (price info from 2013)
? GP gliders (electric self launch)
? ATOS Wing
...
They all are interesting (performance, design, idea, weight...).
But can we call that "affordable?

Wouldn't it about time to get an affordable self launch electric ac ?

 

[jedi]

Wouldn't it about time to get an affordable self launch electric ac ?

That would be an electric paramotor. They are for sale and are roadable too. Very few pilots will admit that there are roadable aircraft available. You can walk down the street with one or you can carry it in the boot of a vehicle. You could even modify a wheel barrel to make a more useful roadable.