For those of you that are new . A few years back I was curious about wind tunnels. I made one similar to the Wright brothers . Its just a litle more modern in...
I've decided to start building the lower 12' of the WD-40 wing. The construction will be FG over foam w/ plywood hinge-points mixed into the layup. The...
I wanted to do what you are doing for a long time. I've backed off and I'll be doing "John wing". :-) No shear web? I know that compilcates matters....
John, What was the scale of your model wings to the real ones? (1/3 ? 1/4?) I am always afraid Reynolds number effects will screw up the results in a small...
Deane , From researching windtunnels I know what you are talking about in the scale aspect. I have an rc airplane design book that described how war bird...
I was talking with Chauncey Griggs a few years back. The conversation was about testing sections. He had a funny idea. Make 2 different sections with...
Kevin, I'm glad you are plunging into the wing project. Please post your progress. I have a feeling wings will start catching on as a few more start to...
Don't laugh too hard! :-) In the early years of windsurfing, I recall seeing a picture of windsurfer rig on a truck/car or something doing some sort of...
That's actually a pretty good method. I've heard of people doing the same with faired tubing sections on a pivot to see which one has the least drag. Of course...
The shear web does make the build a bit more difficult. I was thinking of cutting out 1/2" of the chord at the max. thickness and replacing it w/ plywood. The...
Kevin, How will you cut the foam core? In one 12' piece? I recently completed a 15' by 17 inch chord wing mast for my DN. I cut 30 half airfoil pieces having a...
Ben Gooch connects his sections like you are thinking. He uses aluminium pipe that sleeves into each other. He also builds foam wings and uses the aluminium...
Did you say you were familiar with the Quickie experimental aircraft? Why not do it like they do it but just scaled back a bit (a trough for the spar and the...
re: aluminum pipe ... I recall you saying that he uses irrigation pipe ... right? re: 1/2" ply ... on second thought it's probably doing double duty (spar and...
I am familiar w/ the Quickie design and I thought of making up a FG spar for the wing. The reason I want to use the plywood is not shear so much as crush ...
Yes, the Quickie layup DOES look like a lot of work. Alternately you could also make a box spar similar to john's wing in place of the plyood. The only...
John, I was just doing some Reynolds number calculations. Rn goes down with decreasing chord and airspeed. Below Rn of about 300,000 is where turbulent flow...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the wingboats group. File : /REYNOLDS.XLS...
wingboats@yahoogroups...
Mar 8, 2007 3:07 pm
98
I knew I was taking a chance when I made the high aspect short chorded wing . When I shaped the nose I left a small hard edge on the tip for the same reasons...
John, It was 1/8" wide. It doesn't take much, just enough to "trip" the boundry layer and cause little micro-swirls behind it that stick to the curved portion...
I was lurking on some other iceboat web sites and found a link to sailing theory ect. http://www.sailingusa.info/true_wind_calculator.htm There seems to be...
I am on that same Yahoo group and saw that calculator too. A great tool. From playing with it you can see how important it is to reduce drag of the wing so...
I found this on the web recently. It is an excerpt of the most interesting aerodynamic parts of a thesis on a winged catamaran. One of the differing parts is...
It would be interesting to duplicate what he has theorized and test it against my section in the wind tunnel. I can't open the other links in the article . Are...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
