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cw Accro Posteur
Inscrit le: 06 Juil 2008
Localisation: Blandford, Dorset, Southern England
Âge: 76
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Posté le: 30/04/2011 17:50 Sujet du message: |
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Beat, I drew the Rhonsperber in Illustrator, but I am a novice in CAD, so the drawings are pretty rough and not always updated. I have used my usual wing sections (HQ35/15-12). That said, anyone who wants a copy is most welcome...
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Stephan Psycho Posteur
Inscrit le: 15 Mar 2006
Localisation: Pattensen/Hanovre-Allemagne
Âge: 65
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cw Accro Posteur
Inscrit le: 06 Juil 2008
Localisation: Blandford, Dorset, Southern England
Âge: 76
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Posté le: 01/05/2011 08:50 Sujet du message: |
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Stephan, it is a fairly simple matter to modify the the thickness of the profile in either Compufoil or Profili...
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Stephan Psycho Posteur
Inscrit le: 15 Mar 2006
Localisation: Pattensen/Hanovre-Allemagne
Âge: 65
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cw Accro Posteur
Inscrit le: 06 Juil 2008
Localisation: Blandford, Dorset, Southern England
Âge: 76
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Posté le: 01/05/2011 10:17 Sujet du message: |
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Yes, Stephan, that is correct... The reason for changing the thickness is to achieve a compromise between the appearance of the full size (always thick!)
and getting a model that will perform as efficiently as possible, especially on the hill, where this can be very important.
My models are always 12% thick at the wing tip, but vary at the root depending on the decisions I make at the time. Thus the Bergfalke is 12% at the root (because it is small) and most of the larger models are 14 or 15%...
Here you can compare the model with the full-size:
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Beat Accro Posteur
Inscrit le: 17 Déc 2007
Localisation: Schweiz
Âge: 62
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Posté le: 01/05/2011 10:24 Sujet du message: |
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Hi Chris
I'm also a bit confused about the HQ35-15/12.
On Dr. Quabecks page (http://www.hq-modellflug.de/) there is no HQ of this type anymore. He has now classified his profiles as follows:
» Freeflight (no RC) HQF-...,
» Flaps HQW-...,
» Oldtimer HQ/Oldy-...
» Flying Wings HQ/S-...
» für Winglets (low Re-Number) HQ/Winglet
» für dynamische Segler/Großsegler HQ/DS-...
» für Akrosegelflugmodelle HQ/ACRO-...,
Additionaly i have an old Book from the 80's where he has some HQ 35/xx series in (but it's 30 Jears old )
Could you send me coordinates from your used profile that i can compare with my data (any format is welcome)
(I think this works via private Mail, but i never used it therefore. Otherwise you could send me a message via my website and copy the data into the text.)
However, i will have to decide between the HQ35-15 to HQ35-12 layout and the MS 535-1 to MS535-3v version on the other side for my 1:3,5 Rhönsperber somehow.
Many thank in advance
Cheers,
Beat
www.retroplane.ch
www.rhoensperber.ch
www.beatbachmann.com |
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cw Accro Posteur
Inscrit le: 06 Juil 2008
Localisation: Blandford, Dorset, Southern England
Âge: 76
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Posté le: 01/05/2011 11:21 Sujet du message: |
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Beat, E-mail sent...
This profile was developed about 30 years ago by Mr Quabeck, specifically for scale gliders. Regardless of how efficient it is, you can build a flat wing (no twist) and end up with a wing that very SAFE at low speed, that is to say it has no bad behavior at all, a very important consideration with a scale glider that has many hours of work in it
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Beat Accro Posteur
Inscrit le: 17 Déc 2007
Localisation: Schweiz
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cw Accro Posteur
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Âge: 76
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Beat Accro Posteur
Inscrit le: 17 Déc 2007
Localisation: Schweiz
Âge: 62
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