Having trouble finding this answer.. Which countersink do I need for the #10 screws on the rudder? Is it 82 degrees, or a 100 degree rivet countersink? On that note, what would the 130/120 countersink so be needed for?
Having trouble finding this answer.. Which countersink do I need for the #10 screws on the rudder? Is it 82 degrees, or a 100 degree rivet countersink? On that note, what would the 130/120 countersink so be needed for?
The #10 screws have 100 degree heads, the countersunk pulled rivets used on our RVs typically have 120 degree countersunk heads, though in the latter case I believe Vans mentions just using a 100 degree dimple or cutter for them, in the build instructions.
AN426 rivets have a 100 degree head.
From our bible:
"e. Countersunk head rivets MS20426
(supersedes AN426 100-degree) are used on the exterior surfaces of aircraft to provide a smooth aerodynamic surface, and in other ap- plications where a smooth finish is desired. The 100-degree countersunk head has been adopted as the standard in the United States."
Thanks! I was lookin in the manual before I ordered a countersink. Yard store has like 4 different degrees of the same countersink. I appreciate the help