With the pitch-adjusting tool completely assembled, you can now VERY EASILY set the pitch of the propeller when it is either on or off the aircraft.

1) First, if you are not setting the pitch up with the propeller mounted on the aircraft, you must find a flat smooth surface large enough to be able to support the face of your hub. Also when setting up the pitch in your propeller, your hub should not be allowed to rock back and forth. When mounted on the aircraft this will not be a problem. But if you are going to be using a table it is a good idea to elevate your hub at least 1", this will allow enough table to blade clearance when it comes time to rotate your blades.

2) Now when setting pitch on a table, make sure that you have the curved air flow side of the propeller blades facing up. When setting pitch when the propeller is already mounted make sure the blade you are setting is in a horizontal position in reference to the ground or gravity will not be able to do its job. Place the pitch tool on the flat face side of the hub and adjust the tool so that it reads zero. This can be done by moving the white center plastic piece until the zero line is in line with the line on the angle indicator. When setting the pitch of the propeller when it is already mounted on your aircraft the white plastic degree scale will be at about 90 degrees perpendicular to the clear base plastic piece. (To get the best possible accuracy slide the angle indicator on the plastic bushing away from the white plastic degree scale. Also during all angle measuring lightly tap the tool assuring that you are getting the most accurate reading possible.)

3) With the tool set at zero, in reference to your hub, slip the tool over one tip end of the blade until it rests firmly in position. (The position that it will stop sliding on is approxi­mately at the 75% cord location.) BUT MAKE SURE that the white degree scale has not been allowed to move during this process. With the pitch-adjusting tool located on the tip end of one blade you can now slowly rotate the blade in the hub until you have reached your desired degrees.

4) With this simple but accurate tool we have been able to set up angles in 1/2 degree increments. Repeat above procedures for other blades; it is also a good idea to double check your readings before going on to the next blade. Also when setting pitch on the airplane set the pitch for each blade in approximately the same horizontal blade position. This means you will have to spin your prop around and re-zero your tool each time.

GSC PITCH ADJUSTING TOOL

Some assembly is required before use of this tool can begin.

1) First peel off any protective paper covering that may be on any of the plastic pieces.

2) Now locate the small machine screw, the head of this screw will from now on be considered the front of the tool. Find the plastic spacer and slip it on the screw. Next, place the angle indicator onto the spacer, which is already on the screw, keeping the line, which is printed on the indicator towards the front.

3) With the angle indicator on the spacer, place the screw through the white piece of plastic keeping the printed side towards the front

4) Next, place the screw that is protruding out of the back of the printed white piece, into the remaining larger clear plastic piece that has the curved hole in it.

5) Finally, place the nylon lock on and secure the tool assembly, but remember when

securing the nut, you must have just the right amount of torque on the nut. To determine

how loose or tight this nut should be, do the following. While holding the back clear

piece of the tool, you must have the white piece of plastic loose enough to allow you to change

it to different positions. However the nut also must be tight enough as not to allow the

white piece of plastic to move on its own.