- Joined
- Aug 5, 2020
- Messages
- 64
- Reaction score
- 25
As some of you know, I acquired a basket case 1936 J2 with no paperwork, that I am going to build back as a home-built. Right now I am in "discovery" phase, my current question is about wings, The wing parts that came with the plane are a mix of J2 and J3 pieces. A few are OK, however the rest are rather tattered. It appears that the J2 and prewar J3 wings had the same size spars, specifically 5 5/8 inches high by 13/16 inches thick for the Front Spar and 4 inches high by 7/8 inches thick. In comparison the WAG AERO Cuby Spars are both 3/4 inches thick, by 6 1/4 inches high for the front spar and 4 1/2 inches high for the rear spar. I am not sure which wing foil I am going to use or the inside wing ends configuration, the J3's sure looks simpler on the inside ends.
I have heard that the wooden spars have more damping ability and therefore nicer riding than the metal ones, I wonder if the deeper Cuby Wood Spars are more like the original wood ones or the metal? Right now I am trying to figure which way to go. I am likely to use either Western Hemlock or Grand Fir (lowland white fir, which has near identical properties as Spruce) for the spars. My family has about 1000 acres of conifer timber-lands with mostly Douglas Fir, Western Hemlock, some Grand Fir, and just a little bit of unusable Sitka Spruce with too many knots. I am going engage a very competant small mill operator to custom cut the wood to the proper specs and cure it myself.
Your opinions please. Jim
I have heard that the wooden spars have more damping ability and therefore nicer riding than the metal ones, I wonder if the deeper Cuby Wood Spars are more like the original wood ones or the metal? Right now I am trying to figure which way to go. I am likely to use either Western Hemlock or Grand Fir (lowland white fir, which has near identical properties as Spruce) for the spars. My family has about 1000 acres of conifer timber-lands with mostly Douglas Fir, Western Hemlock, some Grand Fir, and just a little bit of unusable Sitka Spruce with too many knots. I am going engage a very competant small mill operator to custom cut the wood to the proper specs and cure it myself.
Your opinions please. Jim
Attachments
Last edited:
