Long Wing, Low Pass

[tonycondon]

Here's a sweet video that just got forwarded to me. Its the ETA sailplane, which has approximately infinity wingspan and an L/D so high that its really hard to measure. Check out that flex!

http://www.dailymotion.com/video/x2s14v_passage-du-planeur-eta_extreme

 

[Trapper John]

Here's a sweet video that just got forwarded to me. Its the ETA sailplane, which has approximately infinity wingspan and an L/D so high that its really hard to measure. Check out that flex!

http://www.dailymotion.com/video/x2s14v_passage-du-planeur-eta_extreme

Wow! What are the wing spars made of? And the rest of the wing structure?

Can anyone translate German?

http://www.leichtwerk.de/eta/de/technologie/index.html


Trapper John

 

[tonycondon]

very little info here:
http://en.wikipedia.org/wiki/Eta_Aircraft_eta

and Pete vonKrautBoy should be able to provide translations

 

[Steve]

Here's the English version

http://www.leichtwerk.de/eta/en/news/index.html

 

[KennyFlys]

That's pretty cool. The wings have a lot of flex upward. What about downward in negative G's?

Let's see that kind of energy management in an Airbus 320. I'm sure the results would shut up the idiots in the media who keep spouting nonsense.

 

[bbchien]

I read German.

Wow. L/D =72. Seventy-Fricking-two! 650 kg empty. 30 m wingspan. Designed for a 47KW engine and 950 kg mgw. I could not determine what minimum sink was.

 

[fgcason]

I read German.

Wow. L/D =72. Seventy-Fricking-two! 650 kg empty. 30 m wingspan. Designed for a 47KW engine and 950 kg mgw. I could not determine what minimum sink was.

From the wikipedia article:
"Currently, the private development of the Concordia sailplane promises a further elevation of lift-drag (l/D) ratio of several points."

What are they trying to do? Glide off the edge of the Earth?

 

[bbchien]

What are they trying to do? Glide off the edge of the Earth?

Jay_us!

 

[akite]

That is some serious flex!

 

[vontresc]

Well here's the "von KrautBoy" translation....

All carbon Hexcell M20 Prepreg cloth Autoclave cured at 130C at 6 bar.

Looks like a min sink of 0.4m/s at around 100 Km/h

And it maintains a better than 30:1 L/D at 200 Km/h. that's pretty fricking sweet!

here are the polars... http://www.leichtwerk.de/eta/de/flugerprobung/leistung.html

 

[wby0nder]

What are they trying to do? Glide off the edge of the Earth?[/quote]




Thanks for that.

 

[AdamZ]

That has to be an absloute Rush

 

[Capt. Geoffrey Thorpe]

Well here's the "von KrautBoy" translation....

All carbon Hexcell M20 Prepreg cloth Autoclave cured at 130C at 6 bar.

Looks like a min sink of 0.4m/s at around 100 Km/h

And it maintains a better than 30:1 L/D at 200 Km/h. that's pretty fricking sweet!

here are the polars... http://www.leichtwerk.de/eta/de/flugerprobung/leistung.html

Something tells me that I probably can't afford one.

 

[rottydaddy]

Awesome.

 

[BillTIZ]

What are they trying to do? Glide off the edge of the Earth?

If you can see the horizon... you can reach it.

 

[buraian]

Wow. That was just... beautiful.