• Ideal for any task requiring precise angle measurements.
• Measure right thrust on R/C airplanes: Hold the angle finder on the thrust washer and measure the angle to the left side fuse.
• Flip the tool over and measure the angle to the right fuse side.
• The difference between the two readings is the thrust angle.
• Measure down thrust on R/C airplanes: Block the tail so it is level.
• Block up the protractor so it is parallel with the table and line up the pointer with the thrust washer.
• The reading will tell you the amount of down thrust the engine has relative to the tail.
• Car modelers can use the Builder's Protractor to set caster/camber angles and toe-in (remove the short end of the pointer).

One Plastic Builder's Protractor

Length: 8-1/2" (216mm