Video 3 of 4. Test Number Two-3D Printed Hamilton Standard 11x6 propeller on thrust test stand.

This is test number two on a new 3D printed propeller with substantially altered blades from the first test. These propeller blades use an under cambered airfoil and are shaped to resemble those of the Grumman F6F Hellcat. The diameter is 11.87 inches with a four inch pitch angle. I have a Tower Hobbies F6F Hellcat, this propeller was created as a scale size and shape to fit that airplane. This time there was an "incident" at full throttle, however the lower setting thrust levels were impressive.
The measuring device for thrust is a School Supply Company Spring Scale, commonly known as a fish scale. The track is 8mm steel rod with the carriage mounted on four LM8UU linear bearings.
Performance:
1/4 throttle, 6 ounces of thrust.
1/2 throttle, 14 ounces of thrust.
3/4 throttle, 21 ounces of thrust.
Full throttle, -------------Null------------.