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POWERFIN
Propellers: F-A-Q's
Frequently Asked Questions |
What Tests can be perform for me to evaluate the efficiency of the PowerFin blade models & configurations?
Every pilot would like to know the relative performance of their propeller configuration. However, evaluating that performance requires some time and effort.
STATIC THRUST
A common method for pilots to measure the Thrust performance of their blades is to setup a Static Thrust Test. Normally, this is done by either having the aircraft pull a harness that is attached to a weight measuring device or push against something as simple as a bathroom scale - and record the pounds (or kilgrams) of pull or push.
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SPOOL UP TIME
Spool-Up delay is important for those wanting a faster throttle responding aircraft. Benefits of a faster responding throttle - more immediate RPM changes in the propeller - allows a pilot more flight maneuvering options; and for obvious
safety concerns - a faster responding throttle helps the PIC avoid some awkward situations; and to reach the aircraft's maximum climb rate sooner!
Relative Spool-Up time can be determine via timing a 'drag race'. From a dead start, measure the time it takes to cover a fixed distance on the ground.
If comparing to other Makes & Models of propellers - than attached the other prop set, and with the same density altitude, perform the test again and compare the results. Here, faster is definitely better! And with Powerfin Propellers light MOI (Moment of Inertia) you will find that our carbon-fiber composite is strong and yet, very light weight - relative to other brands - so that you will obtain the fastest SPOOL UP Time with Powerfin!
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