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What is the minimum slope for a slope soarer?...

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Foxfan17/08/2019 15:21:29
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Hi all, I would love to try slope soaring, but I live in the dreaded Flatlands, where the only slope is probably the embankment of a local dyke. What is the minimum slope you can expect a PSS to work on? We do have a pretty constant wind though.

Martin

Steve J17/08/2019 17:25:12
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It sounds to me like you want a small DLG type model.

Steve

Andy Meade17/08/2019 17:25:49
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I think you'd struggle to fly anything pss off a dyke, unless it was of a foamboard profile type I'm afraid.

Shaun Walsh17/08/2019 17:57:05
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Never done it myself but I am pretty sure a PSS would need a decent slope and a stiff breeze, they weren't designed as gliders.

On a more practical note a glider with an electric motor would enable you to test just how small a slope you could use, if it's too small, a short burst of power will get you home safely and you can move on and try another location.

Trevor17/08/2019 18:10:38
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Are your flatlands anywhere near the coast? It’s astonishing how much lift you can find off sand dunes on the right day.

Trevor

Shaun Walsh17/08/2019 18:22:12
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Posted by Trevor on 17/08/2019 18:10:38:

Are your flatlands anywhere near the coast? It’s astonishing how much lift you can find off sand dunes on the right day.

Trevor

Very true Trevor, a stiff sea breeze can make a big difference.

Foxfan17/08/2019 19:26:49
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I am somewhere near the coast, although it means a day out type of trip. Not exactly local.

What's DLG, Steve J?

I do have a powered glider and hope to fly it tomorrow from the normal field, but always wanted to try slope and especially PSS. Looks as if that'll have to be kept for that day out!

Martin

Steve J17/08/2019 19:42:27
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Posted by Foxfan on 17/08/2019 19:26:49:

What's DLG, Steve J?

Discus Launched Glider. Have a look on the T9 and Hyperfight websites.

Steve

Foxfan17/08/2019 19:50:09
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I always assumed the discus launch was only for flying wings. How is DLG relevant to flatlands? I've never seen it done.

Martin

Simon Chaddock17/08/2019 20:54:40
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Foxfan

You need enough slope for a sufficient 'volume' of air to be deflected upwards to give you have enough space to manoeuvre the plane and stay within the rising air area.

A volume deflected by a small slope means you will have to stay close to the slope and as suggested use a small plane.

It is of course a requirement that the slope is facing into the prevailing wind!

Beach sand dunes do have the advantage that the wind tends to blow 'on shore' more often than not.

'Flat lands' are good for thermals so get good at finding them with your powered glider. wink 2

Steve J17/08/2019 21:07:59
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Posted by Foxfan on 17/08/2019 19:50:09:

How is DLG relevant to flatlands? I've never seen it done.

Google F3K.

PatMc17/08/2019 21:30:43
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Posted by Simon Chaddock on 17/08/2019 20:54:40:

 

Beach sand dunes do have the advantage that the wind tends to blow 'on shore' more often than not.

'Flat lands' are good for thermals so get good at finding them with your powered glider. wink 2

Dunno what makes you think that but it's not true of this part of the NE of England coast where the wind is off shore more often than on shore.

Edited By PatMc on 17/08/2019 21:31:36

fly boy317/08/2019 21:56:44
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I have seen a video sometime ago on the forum of a member slope soaring off sand dunes. I will try to locate it.Cheers

Foxfan17/08/2019 22:20:36
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798 forum posts
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I have seen youtubes of dune soaring quite successfully.

PatMc, my son lives up that way and it was being up there that made me think of slope soaring.

Cheers,

Martin

Foxfan17/08/2019 22:34:20
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DLG, Ye Gods, I'm not sure I could do that to a model! And I couldn't have anything that big.

Martin

 

 

Edited By Foxfan on 17/08/2019 22:41:06

brokenenglish18/08/2019 08:08:59
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Posted by Foxfan on 17/08/2019 22:20:36:

I have seen youtubes of dune soaring quite successfully.

PatMc, my son lives up that way and it was being up there that made me think of slope soaring.

Cheers,

Martin

Yes, but Pat's post reflects the fact that, in our part of the world, you get onshore winds more often on a "west coast" than on an "east coast".

Plus the fact that, IMO, successful dune soaring depends on identifying "special" spots that give "special" conditions, with a prevailing wind that is frequently "just right".

John Lee18/08/2019 09:51:25
645 forum posts
47 photos

Years ago I flew a SAS Blob off the local 10 meter high sea defence wall and whilst I could stay airborne I quickly came to the conclusion it was all too marginal and never bothered to try again. No doubt a modern DLG would be better but I would not like to try any PSS.

KiwiKid18/08/2019 11:33:43
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465 photos

Hi Martin - there are quite a few models that will fly well off a small slope. A PSS model is not generally one of them though o/a of the generally high wing loading compared to a dedicated glider. DLGs generally have a 1.5m wingspan, but there are smaller 1m w/s versions that might suit what you have available. There are also small foam flying wings available that are fun. Here's a vid I shot years ago in poor light at a small man made lake, just pottering around with a variety of models - in order of appearance are: home made DLG, Dreamflight Alula wing, home made EPP Eagle, Elegance glider, Bird of Time glider.

**LINK**

Jason-I18/08/2019 11:47:22
173 forum posts
33 photos

I fly my phoenix 2000 off my local sand dunes when the wind is blowing in straight off the sea. As the sand dunes are not very high, a good stiff breeze is required for a good flight 15-30MPH winds is my favourite range.

At 30MPH+ winds I take my durafly Excalibur devil

Here are a few vids of a chap dynamic soaring his Phoenix on sand dunes....

**LINK**

**LINK**

Foxfan18/08/2019 12:16:50
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Looks like it ain't gonna happen round here as I don't have space for a huge glider, tempted though I am, but thanks for the links.

Martin

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