Quote:
Originally Posted by scon10
Pic 1 shows the real tank and you can see why the shape is so complex, it is a laminar flow shape, with the maximum diameter at around half the length and flowing lines to the nose.
I printed this photo and traced the outline as accurately as possible, resulting in pic 2.
I decided on 6 segments, see the redlines A to E on pic 3. These red lines also serve to measure the diameter of the bulkheads of the segments, which I drew on cardboard and cut out.
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Just want to add that the shape of the tank as shown is not laminar, closer to a symmetrical shape of 40%. If the Connie had laminar flow tanks, the angle of the photo is why it doesn't look laminar.
The third photo is much closer to laminar.
Problem with laminar is it needs to be exact to work correctly.
Bug build up on leading edge of wing? Not laminar anymore.
Rivet heads sticking up or slight indentation around them, not laminar anymore.
Attaching a photo of two Laminar plotted airfoils using the green photo #2 you show. Top Airfoil is a symmetrical 15%@ the 40% location.
You can see the 50% plotted one on the bottom of the attached screenshot.
The blue photo #3 is much closer to a laminar 50%. Great Job!
Really love the Connie. Will be watching with interest!
If you're interested I can supply a jpeg screenshot of the laminar for use. Actually thinking of doing some uploading of all the airfoils I've plotted to the download section as jpg or can do pdf as well.
Mike