Newest Sailplane in the world on display at the 2016 SSA convention

On Saturday, February 20, 2016 at 1:23:11 PM UTC-5, wrote:
Anything interesting to report from Christoph Wannemacher's presentation on "Design Philosophy for the New Ventus" e.g information on the aspect ratio, aerofoil, wing thickness, transition position, turbulators etc?

John Galloway

From my notes:
600kg
10.83 m2/116.575 sq ft
55.4 kg/m2 11.35 psf
AR 29.9
sport (little - 2cxa size - based on 2cxa) side-hinged canopy
Goal of certification and having a number available for WGC Bennala
down the road, FES and T
then
performance edition (larger)
quintus cockpit
self-launch
(T or FES if demanded... but SL first)

Description of new wx model; validation using WGC Uvalde data and Euro championship. Result - you have 2 modes, thermalling or fast and spend almost no time at best L/D. goal to optimize for these 2 modes.

climb perf in weak small thermals - data from euro contests - lift that V2CXT couldn't climb in, V3 had theoretical 15 kph x-c speed (contests are won or lost on the weakest days).

Goal of increased cross-country speed.

Started with an aero check of Arcus from large contests to validate that aerofoil. Result - good basis for start of work on V3 ("new Ventus" according to S-H marketing but informally known as V3).

General of description of wing evolution from original Discus to this; discussion of winglets too (didn't take notes)

wing thickness
root 14.8%
closing in to root 12.9%
outboard of spoiler box 13.2%
blend near winglet 13.1%

Horizontal tail volume/area reduced

Flutter - certification for CS22 AL2 - higher torsional stiffness
Fuselage - higher crashworthiness = heavier fuselage

2 sets of water tanks (one small below bigger) - one release like zig-zag - looks like you dump the big one but keep a smaller volume that doesn't slosh when you have partial water (not stated but that's what it looked like to me - I have been wrong on this kind of thing).

Jan 29 first flight; to briefing date 20 flights / 13 hrs (wx has sucked in Europe)

Next, turbo in sport fuselage ~ 4-5 weeks. FES "in summer"

In 6 weeks, mockup of big version; canopy to be forward-hinged
carbon-fibre.

"later" - solo 2625-01 injected SL system - better high and hot

Questions - wing soft/stiff? Stiff. ran out of time for more...

Overall, an impression of a fast-moving, ambitious programme that starts with the pure gliders (small then big), and as resources permit, moving to turbo, then SL, then FES (if there is demand).

I think I have most of this correct - I was trying to pay attention and scribble mostly legible notes.

If you have questions, best to ask the dealer...