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This set up measures a tractor prop. Set up as shown and then turn on scale.

Scale calibrates with weight as "zero". Thrust is measured as increased weight.

To measure a pusher prop, place more weight on the test stick than anticipated thrust.

Recalibrate as you did earlier. Scale will measure thrust as negative weight.

All parts other than carbon rod and music wire pivot are made from paint stirrers.

Test stick slides over carbon rod and hangs from scale point.

Be sure the test stick and thrust are not over what your scale can handle  HOME

scale.jpg (11086 bytes)teststick.jpg (13018 bytes)