Hello Biggles,Biggles wrote: ↑Tue Feb 16, 2021 11:17 amThanks again for the help in airofoil selections. With this crazy lockdown and no beach allowed, I have been drawing 3D foils and wings to keep myself sane!
Would it be possible to run 2 more calcs for me to get preferred sections? I see the top of this page request you added a min velocity as 10km/h - please can you do that for these.
1. 90kg , 168500 area , 258 chord , 955 span - low 10km/h speed biased
2. You also wrote : "The optimiser 5000 says that area of around 1450 cm^2 is a good area for this speed range / wingspan" This was for 12.5km/h and wingspan 1050 to 1150. Could you do the same for low speed biased 10km/h and same wingspans.
Modeling directly off an Albatross wing gives for 1150 Span , 150 Chord and 130000 area. This seems incredibly little for my 90kg of pies !!
Thanks a lot for your help! It seems like your program is pretty powerful and useful for first time builders like me. I will consider your suggestions for my build and keep you updated, I'll let you know, when I start my own build thread.PrfctChaos wrote:
Happy to revise any of these if you want to update the inputs, such as speed range etc. Would be keen to see your design / build results as well. There might be a lot, so maybe start a dedicated build thread, would be interesting. Cheers.
I have 105kg of pies and originally designed a 1800 sq cm foil which needed the wind to be nuking to get me up with no prior foil experience. I built a 2650 sq cm foil which was easy to learn on in lighter winds and now I'm back to my 1800 foil. Less drag, faster and easy to bump up on foil in all but the lightest winds. Doesn't pump quite as well but travels between lulls faster and accellerates faster. Minimum speed is still quite slow though I haven't measured it. Feels like a fast walking speed. Big foil- med walking speed. But I'm looking at a slightly thinner foil down to 1400 sq cm for my next. And will probably in time go even lower. Pie dependent.
About the 1300 cm^2 area.... it doesn't seem to be small these days. If we have a bit of a look through the popular Axis wings used for prone and Sup foiling around here. (I use Axis often as a example, because there are plenty of guys on them in Perth and they have a great range of different wing types, plus they are one of the few manufacturers that give good info on their wing sizes.). So below are links to a few wings that get used around here depending on whether the user in into speed, pumping, carving etc...Biggles wrote: ↑Sat Feb 20, 2021 9:38 am@PrfctChaos. Yes, the 258 was used for model simplicity as a previous lower aspect wing, that is really epic carving on swell, just got stretched and matched to an Albatross wing on the trailing edge profile ... hopefully I can keep the great carve and add more pump. I was using a completely flat profile as the manufacture was pour polyurethane into silicon moulds which are then bent during cure.
Umdloti & Vechies got foiled every day for many years (Sadly I think foiling has taken a back seat there again now, a very active group in Richards Bay however) ..... now in Langebaan (Some real secret gem foiling swell here) .... and Bigbay is also very underfoiled over twinflipped ! Not enough usage of our swell using foils ... too many speed merchants....and brand designers don't understand the average foiler just wants to chill and have easy fun in lovely conditions.
Sent you a PM regarding your great program.
Hello Spiru. 8 wings, that's a impressive collection! I'm sure you would have heaps of good manufacturing advice for anyone here starting out making wings. Wouldn't mind seeing a pic or two if you have any photos.spiru wrote: ↑Fri Feb 26, 2021 4:37 pmHi,
I am glad I found this thread. I have been making my foils for a couple of years. I have made abut 8 wings and a bunch of stabs. All 3D printed and vacuum laminated in carbon. In fact I am the one who designed and made the https://www.thingiverse.com/thing:4657218 foil that some of you are making. I am happy to see others are using my design. I wonder if it is working well for you. I have learnt a lot on that foil and rode it for thousands of km. Now I am riding mainly a 680 sqcm similar to a Moses 590 in shape but using my own profile with a thin leading edge.
Choosing the right profile has always been my main question and I have been a bit lost in that area. I copied some profiles from commercial wings (Mosses 633) and sometimes I used what I read online that could work, but nothing accurate nor scientific about it. So it seems like you have the perfect tool to improve my wings.
I am thinking about making a fast carving freeride wing of about 800 sqcm and 70 cm wing span. I am 80cm naked.
Do you consider RG 14A-1.4/7.0 to be the best option?
With my 680 sqcm wing I am hitting a max speed limit of about 40km/h, and I would like to know if it would be possible to reach 45 or 50 km/h with a larger area
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