TV Ad featuring Klaus Ohlmann and an Antares 23E

https://youtu.be/5GTX6S8q7x8

On Thursday, September 29, 2016 at 3:03:45 PM UTC-5, Tom (TK) wrote:
https://youtu.be/5GTX6S8q7x8

Cool! I have often wondered about a gravity launch from there. Have no idea what is further down the valley, though.

Fun, but seeing the VW get the glider airborne while going UP the hill would be more impressive!

On Thursday, September 29, 2016 at 4:06:56 PM UTC-5, Tony wrote:
Fun, but seeing the VW get the glider airborne while going UP the hill would be more impressive!

For that matter, the Antares could have probably rolled down the hill and taken off on it's own...

What I want to know is how the glider got pulled through the hangar's steel supporting beams and walls without damage to it's wings!

Kirk

On Friday, September 30, 2016 at 11:32:34 AM UTC+13, kirk.stant wrote:
On Thursday, September 29, 2016 at 4:06:56 PM UTC-5, Tony wrote:
Fun, but seeing the VW get the glider airborne while going UP the hill would be more impressive!

For that matter, the Antares could have probably rolled down the hill and taken off on it's own...

According to https://skyvector.com/airport/LFLJ/Courchevel-Airport there is a difference of 212 ft between the ends. I'm not sure that's reliable. Other sources say the length is 537m with a gradient of 18.5 or 18.6. If I understand what "gradient" means in this context, then that's a 99 m height difference (325 ft).

Without friction loses, a 212 ft drop is good for 69 knots from a standing start. 325 ft is good for 85 knots. With friction ... I don't know. Probably more than stall speed anyway.

Gravity launches are a common and approved by aviation authorities method at the Bezmiechowa Gliderport in south-eastern Poland:

https://www.youtube.com/watch?v=YHWcXja9C1s
https://www.youtube.com/watch?v=bdHNRok6Dtk
etc.

I did it there in my (then) SZD-55 standard class modern ship, and could easily continue with an extended ridge flying. Great and costs next to nothing.

BravoMike

On Friday, September 30, 2016 at 2:00:33 PM UTC+13, BravoMike wrote:
Gravity launches are a common and approved by aviation authorities method at the Bezmiechowa Gliderport in south-eastern Poland:

https://www.youtube.com/watch?v=YHWcXja9C1s
https://www.youtube.com/watch?v=bdHNRok6Dtk
etc.

I did it there in my (then) SZD-55 standard class modern ship, and could easily continue with an extended ridge flying. Great and costs next to nothing.

This is well known :-)

But how much height is used in the launch? Looks like no more than 150 ft. But then the Bocian stalls a lot slower than modern glass and should need only about half the height loss as a result -- exactly half if the stall speeds are e.g. 28 and 40 knots (sqrt(2) ratio)

Plus I'm sure there was a headwind.

At 09:57 30 September 2016, Bruce Hoult wrote:

Plus I'm sure there was a headwind.


Apparently, the biggest issue was to pass the SUV at a sufficiently low
altitude.

The video is all about selling the SUV, not about demonstrating a properly
executed aerotow.

At 09:57 30 September 2016, Bruce Hoult wrote:

Plus I'm sure there was a headwind.


Apparently, the biggest issue was to pass the SUV at a sufficiently low
altitude.

The video is all about selling the SUV, not about demonstrating a properly
executed aerotow.

At 09:57 30 September 2016, Bruce Hoult wrote:

Plus I'm sure there was a headwind.


Apparently, the biggest issue was to pass the SUV at a sufficiently low
altitude.

The video is all about selling the SUV, not about demonstrating a properly
executed aerotow.