reo12, what do you make of the guy on ebay that has Tedlar, located in Elkhart, IN? I'm looking to recover a Falcon UL, too. If my calcs are right, 0.002 Tedlar is 0.23oz/ft^2. Oratex 600 is 0.4 oz/ft^2 at 0.0047 thickness. Difference should be less that 2# total to cover the canard and wings. Why not use Oratex other than cost?
Do you mean the guy on ebay with the 24" wide TTR20SG4? That is the wrong type and too narrow. Mike Fithian from Falcon East posted on UltralightNews back in 1997 that it was the proper grade - it is not. Why in the heck he did not get that corrected is beyond me. He was selling that grade and even the slow flying Lazair folks were having it separate from the tapes. The proper grade is TUT20BG3 and needs to be 64" wide TUT20BG3 is 2 mil thick and etched on both sides as the tape on the ribs has to stick to the inside and the finishing tapes have to stick to the outside.
Fithian claimed at least 20lb weight for fabric and paint - minimum. A person familiar with Lazairs's stated I needed to figure 10lbs per coat for paint. He's seen a Lazair wing go from weighing 35lbs with Tedlar to nearly 60lbs with fabric and show quality paint finish.
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Here is Fithian's list of the materials needed to recover the wings, canard elevators, and the rudders. The actual footage of tapes are my estimations. His write up can be found at
http://www.ultralightnews.ca/articles/tedlarinformation.htm
100ft PVF film 64" - Each wing will have a total of about 148sq/ft of film on them.
4rolls Seamstick Tape - I believe this is the double sided tape with acrylic adhesive. I do not know if it was Tedlar film. Requires about 170ft
2roll PVF - This is likely the finishing tape used on the edges of the Tedlar. Requires about 60yds total.
2rl Silver Mylar - This is optional for U/V protection of the tape adhesive. Carlos Pereyra used an aluminum foil tape with an acrylic adhesive on the Solaris.
1rl Foam Tape - 3/4" wide double sided foam tape made by 3M with an acrylic adhesive. Requires about 170ft. I think it requires more than 1 roll to get this many feet.
Oh - I forgot to figure the winglets(rudders)
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Your figure of 0.23 oz per sq/ft for the film would total 34 oz of film per wing. I do not know if this is accurate. I can't determine the weight of the various tapes used.
Here are the spec sheets for some grades of Tedar. They only provide the specs for 1 mil TUT10BG3:
https://s3.amazonaws.com/fellers/production/documents/Signgold_-_Tedlar_Spec.pdf
TUT10BG3 has a specific gravity of 1.37. Note - this is 1mil not 2 mil as needed. I would presume that it would be reasonable to determine the actual weight for 1 mil based on specific gravity and multiply the result by 2 for an actual weight. They use ASTM D-1505-68 to determine specific gravity. I am attaching the ASTM test method.
A calculator for determining weight from specific gravity is here:
specific gravity - calculator.org