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Re: WinGsurfing; surfplan help

Posted: Sun Aug 04, 2019 1:00 am
by kitexpert
Even simpler one with 4 panels only. Good luck for the windwing project :thumb:

Image

Re: WinGsurfing; surfplan help

Posted: Sun Aug 04, 2019 7:47 am
by Wingstu
That looks really good! I haven’t had the time to play with SP this weekend, but from what I’ve seen IT looks promising 😃

Re: WinGsurfing; surfplan help

Posted: Wed Aug 07, 2019 10:46 am
by Wingstu
Where I live, it is not easy to get hold of dacron. For a wing like this, could regular ripstop be OK for the leading edge?

Re: WinGsurfing; surfplan help

Posted: Wed Aug 07, 2019 8:08 pm
by kitexpert
Wingstu wrote: Where I live, it is not easy to get hold of dacron. For a wing like this, could regular ripstop be OK for the leading edge?
No way, on the contrary thick LE must be done from good strong materials and with good workmanship. Wing has no bridle to support it so structure must be strong and stiff.

Re: WinGsurfing; surfplan help

Posted: Fri Aug 09, 2019 11:28 am
by Wingstu
I’ve found some PU coated polyester canvas I think can fit the bill 😉

Re: WinGsurfing; surfplan help

Posted: Fri Nov 22, 2019 9:58 pm
by stevet25
Interesting thread thanks

I have built a few very successful strutless kites using plans from PanTau at Wingworks - great thanks to him for sharing.

Thought it was time to have a dabble at self design, and Surfplan is the only platform available at the moment I think. Thought a wingsurfer would be a good introduction to the programme and this is what |I have come up with so far
wing3.png
wing3.png (47.39 KiB) Viewed 429 times
I would be really really grateful for any feedback to tweak before I print cut and sew. One particular concern I have is the profile highlighted by the green rings - I am struggling to work out how to flatten this out which seems the intuitive thing to do - any tips very welcome

cheers

Re: WinGsurfing; surfplan help

Posted: Thu Jan 16, 2020 9:03 pm
by Wingstu
Due to life I haven`t worked om the wing for a while, but two days ago I think I finished my design!
I`ll upload some images tomorrow.

My research has made me switch inspo-wing. The inflatable grabhandles (naish, slingwing) seems awkward, and I will go for a broom like design inspired by the Duotone Foil Wing.

Re: WinGsurfing; surfplan help

Posted: Fri Jan 17, 2020 7:44 am
by Wingstu
Final design (I think):

Front:
Front.PNG
Top:
Above.PNG
Bottom:
Below.PNG
Side:
Side.PNG
The wing is 4 sqm with a span of approx. 3m (flat).
There is no center strut in this design, but a telescope pole will be mounted in its place.

Re: WinGsurfing; surfplan help

Posted: Fri Jan 17, 2020 7:51 am
by Wingstu
stevet25 wrote:
Fri Nov 22, 2019 9:58 pm

I would be really really grateful for any feedback to tweak before I print cut and sew. One particular concern I have is the profile highlighted by the green rings - I am struggling to work out how to flatten this out which seems the intuitive thing to do - any tips very welcome

cheers
Wouldn't the setting Profile depth (%) at chord (%) under Profile - Wingtips take care of that? And maybe No profile at wingtip = true.
Wing-profile.PNG
Wing-profile.PNG (12.31 KiB) Viewed 260 times

Re: WinGsurfing; surfplan help

Posted: Fri Jan 17, 2020 4:32 pm
by kitexpert
Wingstu wrote:
Fri Jan 17, 2020 7:44 am
Final design (I think):

Front:
Front.PNG

Top:
Above.PNG

Bottom:
Below.PNG

Side:
Side.PNG

The wing is 4 sqm with a span of approx. 3m (flat).
There is no center strut in this design, but a telescope pole will be mounted in its place.
Consider having less segments (in the wingtips), they just increase amount of work. In general Surfwing is primitive thing, there is no need to try to make it more complex than it has to be. Stiffness is probably the most important thing, and IMO your LE looks too thin at the wingtips. It may even buckle under load (there is no bridle support). So check out and estimate how thick LE strut is in commercial wings. In some projections SP shows LE strut deformed at the wingtips in your design, IDK if there is some real problem or not. Worth checking and playing with different options for the wingtip shape, some of them also look correct.

Steve25: there is fully manual adjustment for canopy curve in SP, also for dihedral wings. Practically any shape is possible. Mr. Hansen explained this earlier in this thread.