TonyHallo
150cc
Doing a little revamp on the Champ. Removed the fabric on the fuselage to replace the landing gear brackets. The brackets were just too long. See phot of full scale and model below. I bent the right side brackets last year when I stalled during landing. I had a dead stick this year when I decided to try to eliminate the mid range rich condition, bad move. At any rate I have the new brackets installed which moves the pivot point up about 3/4" and will make new landing gear struts that are a little lighter and closer to scale. I have the 4130 tubing on hand and ready to go.
The Champ doesn't have the benefit of the steel center that David's Cub has so the lift forces at the fuselage are transferred through the window posts. These are 3/8" spruce covered with 1/32" plywood on both the inside and out side. I found both front post cracked on the top where the post needs the root rib. I had cracked the bottom of these last on the stalled landing, I was able a mill grooves and epoxy in 1/8" music wire to repair. This has worked well and I am quite sure the upper joints were not cracked last year. To repair the upper connections I made up a drill jig and drilled though the top of the root rib into the posts with 12" long 1/8" drill bit. I threaded 1/8" steel rod with a 6-32 die and epoxied these into the holes.
is landing gear
The Champ doesn't have the benefit of the steel center that David's Cub has so the lift forces at the fuselage are transferred through the window posts. These are 3/8" spruce covered with 1/32" plywood on both the inside and out side. I found both front post cracked on the top where the post needs the root rib. I had cracked the bottom of these last on the stalled landing, I was able a mill grooves and epoxy in 1/8" music wire to repair. This has worked well and I am quite sure the upper joints were not cracked last year. To repair the upper connections I made up a drill jig and drilled though the top of the root rib into the posts with 12" long 1/8" drill bit. I threaded 1/8" steel rod with a 6-32 die and epoxied these into the holes.
is landing gear