Discus 2a vs Arcus @ 200km/h - EGC 2013

waremark wrote, On 7/19/2013 9:20 AM:
On Friday, 19 July 2013 10:47:45 UTC+1, Wolf Aviator wrote:
Hi ladies and gents,



Here is a video made by Sebastian Kawa on ECG 2013 at Ostrów in

Poland.



This video presents final glide of his Discus 2a wing to wing with

Arcus flying at 200km/h. As you can see at this speed performance

of 20m span glider is no better than 15m Discus 2a.



http://www.youtube.com/watch?v=5xrDLQ61474



quote (1m 8s of video):

"A why they're buying such expensive gliders...".

Regards

Wolf

http://youtube.com/user/WolfTheAviator

Thanks for the translation and the other info. As an Arcus owner I
was rather disappointed! Was the Discus flying in 15m or 18m mode? Do
we know how the wing loadings compared?

You don't buy a two seat, 20 meter glider for it's 200 kph performance.
How fast would the Discus go with a 180 lb passenger?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl

On 20/07/2013 07:19, Eric Greenwell wrote:
waremark wrote, On 7/19/2013 9:20 AM:
Thanks for the translation and the other info. As an Arcus owner I
was rather disappointed! Was the Discus flying in 15m or 18m mode? Do
we know how the wing loadings compared?

You don't buy a two seat, 20 meter glider for it's 200 kph performance.

If you're an owner who wants to enter it in the European Championships,
I'd say you probably did.

How fast would the Discus go with a 180 lb passenger?

Even faster! All that matters is the wing loading and the polar. At
that money, the Arcus should have as good a polar as the D2 - it's
nearly 20 years younger. It was probably flying at a higher wing
loading too.

GC

GC wrote, On 7/20/2013 7:14 AM:
On 20/07/2013 07:19, Eric Greenwell wrote:
waremark wrote, On 7/19/2013 9:20 AM:
Thanks for the translation and the other info. As an Arcus owner I
was rather disappointed! Was the Discus flying in 15m or 18m mode? Do
we know how the wing loadings compared?

You don't buy a two seat, 20 meter glider for it's 200 kph performance.

If you're an owner who wants to enter it in the European Championships,
I'd say you probably did.

How fast would the Discus go with a 180 lb passenger?

Even faster! All that matters is the wing loading and the polar. At
that money, the Arcus should have as good a polar as the D2 - it's
nearly 20 years younger. It was probably flying at a higher wing
loading too.

I didn't suggest adding 180 lbs, I suggested cramming two people into a
Discus. Surely you don't think two 180 pound people in a Discus would be
able to fly at all, much less faster than an Arcus? But to go with the
flow, it would not increase the wing loading, because you'd have to
remove 180 pounds of ballast. Contest rules, you know.

My I should have added a winking smiley face?

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to
email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm
http://tinyurl.com/yb3xywl