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Old Jan 19, 2013, 03:26 PM
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Joined Mar 2008
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Thank you for the reply. I will let you know when I show up

My club (www.gmfk.no) travels to Dk two times a year. We stay in Hanstholm. Have also been to Lønstrup at the small ds site and Knudbjerg fyr. We love these trips. Usually we are about 15 attending.

Det er deilig og være norsk, i Danmark.
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Old Jan 31, 2013, 09:55 PM
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Australia (Newcastle)
Joined Mar 2009
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So you can get by with a virtually flat frontside slope then ?
So DSing down the backside of the slope and back up into horizontal wind and maintain loops ?

I have sight in mind near by I'm keen to try, frontside is almost flat, only about a 2-3' rise over 20'. The backside is pretty deep by comparison.
So if I can throw it high enough to make my first dive, then hopefully I can wind it up ?
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Old Feb 01, 2013, 01:51 AM
Rocket geek
Highlands Ranch, CO
Joined Dec 2007
651 Posts
Quote:
Originally Posted by cleansurf2 View Post
So you can get by with a virtually flat frontside slope then ?
So DSing down the backside of the slope and back up into horizontal wind and maintain loops ?

I have sight in mind near by I'm keen to try, frontside is almost flat, only about a 2-3' rise over 20'. The backside is pretty deep by comparison.
So if I can throw it high enough to make my first dive, then hopefully I can wind it up ?
If you're already very skilled at DS, it's probably possible. But it would be very difficult to learn how to DS that way, because it takes usually takes more than a throw's worth of energy to start a complete circuit, and a there would be no friendly front-side lift to which you could bail out if you don't harvest the shear just right. Maybe a bungee launch could help solve the first problem with some margin for error.
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Old Feb 01, 2013, 02:49 AM
the Laurie whisperer
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Newcastle Australia
Joined Oct 2008
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+1 on the bungee.
That should get you plenty of height for a dive in with momentum.
Let us know how it goes Rick.
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Old Feb 01, 2013, 03:37 AM
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Australia (Newcastle)
Joined Mar 2009
536 Posts
You may know the site stehl.
Grayemstown dam next to the pump station, about 80 meters East of the park fence.
Bugger all slope into the dam, but a nice grassy deeper slope behind.
Extra bonus obsticle is the power lines right across the top of the little ridge

Bungee, agreed.
I need to build a small fast wing. Something like your 26" wing

Want to come give it a try some time

Rick
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Old Feb 01, 2013, 01:44 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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Flat front side, start after hand throw.
The lee area is under 10 feet from slope, over that you are toast and must go an get the glider down the slope.
So you have to fly realy close to the ground/slope to get it going.

At 1:40 show why you shall stay close to ground and fly realy smooth, just a tiny jerk in the elevator stick will kill all the energy, and the glider wont get over the top.

Alula DS. (Do not try this at home) (2 min 33 sec)


This is realy not for beginners...Looks easy, but its not.

90% of small site DSing, is to have the right glider for the contions that you have in the moment that you are at the ridge.



Here a F3b fiberglass glider is great and this is much easier than in the Alula vid.
And here the Alula wont have a chance.

Tree line DS, Dynamic soaring. (1 min 43 sec)


My experience:
1. light foamies as the Alula needs a realy sharp ridge top, almost as a roof top.
2.Very close to the ground when going up over the ridge.
3. Fly with ballast.
4. My small ds sites (around 45 feet) will do in wind speed up to around 22 knots, more that that, the lee have a killer turbolens and are a dead zone even very close to the slope.
5. And dont do it, if you not are ready to loose your glider.


Regards
S
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Old Feb 01, 2013, 04:41 PM
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Australia (Newcastle)
Joined Mar 2009
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S,

Awesome display, you always do great vids SpeedsterDEN.
You've proven a flat front side can still be DS'd Awesome, very challenging.

I'm still in the EPP foamy wing phase, with probably 10 DS sessions under the belt on mid size sites doing up to 100mph. Still banging in a fair bit, but definately getting the feel for it. I'm a very experienced front sider, but class myself as a DS beginner at the moment, working toward intermediate.

Definately agree I will need the right plane with enough ballast for speed and momentum.
Probably something about the Alura size, with a PW51 airfoil flying wing or plank. Would be happy to bang that into the grassy lee side of the small DS site, generally without damage.

Appreciate the advise


2nd Vid
As for the flat field tree line DSing, Wow. Allways wondered if that would be possible. Well done (definately see the need for a very efficent glider there).
Bungee launch I expect ????

Rick
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Old Feb 03, 2013, 11:44 PM
Plays with Toys
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Port Fairy, Australia
Joined Jun 2005
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Nice Video collection

Last few posts remind me of the first time I saw some bloke called Joe DS'ing a row of Trees in 1999 I think as we were abandoning a contest in NZ. Winch Launch fully ballasted F3B Eagle in about 30-40 knots and then proceeded to DS these trees within about 3 feet from destruction from either the ground or the branches. After 3 or 4 minutes sling the plane up to cruise then dive back in after and do it again for another few minutes.

Pilot must have liked the place so much he later migrated
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Old Sep 09, 2013, 02:17 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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More mini DS from my small dune,
2,5 min. DS session with my Arthobby Thermic 2,5
Thermic, Ds session (2 min 57 sec)


Wind only 14 knots.
Speed was measured to 60 mph, not bad for a light thermal glider without ballast.
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Old Sep 09, 2013, 02:22 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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And my 3,2 meter Trinitus F3b in same conditions

Trinitus F3b, advance flying. (1 min 16 sec)


Cheers
S
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Old Sep 24, 2013, 02:08 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
1,341 Posts
Ds from a local inland hill with a small backside drop.
Not the best DS ridge, but good fun anyway.
Arthobby Odyssey 2,7 meter.

Arthobby Odyssey 2,7 M (1 min 37 sec)


Cheers
S
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Old Sep 28, 2013, 01:10 PM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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Ripping a 5 meter/ 15 feet dune with the Arthobby Thermic 2,5 meter today..



Arthobby Thermic 2,5. At the beach. (1 min 43 sec)


And still smiling.



S
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Old Sep 29, 2013, 05:48 AM
Arrarrar!
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Australia, NSW, Wagga Wagga
Joined Jan 2010
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Nice speedster, great flying!
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Old Oct 01, 2013, 04:04 AM
Registered User
Japan, Tokyo
Joined Feb 2013
123 Posts
SpeedsterDEN, I have been watching your videos even before I found this thread, I love them.

I have just build an Alula and I am still in the learning phase. Do you have any tip you would like to share about slope soaring and DSing the Alula?

What is a good weight for this king of flying?

Thanks,
Luca
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Old Oct 01, 2013, 05:00 AM
DS will change your life
SpeedsterDEN's Avatar
Danmark, Nordjylland, Sæby
Joined May 2010
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Quote:
Originally Posted by lunobili View Post
SpeedsterDEN, I have been watching your videos even before I found this thread, I love them.

I have just build an Alula and I am still in the learning phase. Do you have any tip you would like to share about slope soaring and DSing the Alula?

What is a good weight for this king of flying?

Thanks,
Luca
For Dsing the Alula, around 30- 50 gram is good, depending to the wind speed.
And you will need a sharp ridge top, like on the video.
This is the perfekt ridge for the Alula and other light gliders with only a little penetration.

Use a lot of expo on the elevator and ailerons, 60 % is good.
Every control input, specialy the elevator is like pulling the brake, so smoot flying is a must.
A bit more forward CG than the dots is good when using ballast.

When flying up from the backside, dont pull elevator when going over the ridge but just let fly itself, (Almost)

The best tip is:
Low and near to the backside of the ridge, and specialy low over the ridge top on the way up again.
Just a bit to high it will hit the turbolent wind and loose the energy before its in the clean air.

And dont give up if its not working in first attemt.


Its not easy to DS the Alula, so when you can do it with that you can do it with any glider.


Alula, DS at Lønstrup slope (2 min 30 sec)


Good luck
S
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