UAV & Drone Manufacturing worked example

Propeller Balance Scrap at 99% target propeller balance scrap rate: a worked example

What does the result look like when target propeller balance scrap rate reaches 99%? The full calculation is worked below with real intermediate numbers. Use it when propeller balance scrap in uav and drone manufacturing needs a clean rate and gap-to-target you can put on a tier board.

The inputs for this scenario

  • Propellers scrapped for balance failure: 8 count (unchanged)
  • Total propellers balance-tested: 250 count (unchanged)
  • Target propeller balance scrap rate: 99 % (raised for this scenario; the documented default is 95)

Working through the calculation

  • Applying the documented formula (Propeller balance scrap rate = propeller balance scrap count ÷ total propeller balance scrap population × 100) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.2 % for propeller balance scrap rate, the number this scenario is built around.
  • At this operating point the engine returns 95.8 points for propeller balance scrap gap to target.
  • At this operating point the engine returns 8 count for propeller balance scrap count.
  • At this operating point the engine returns 250 count for total propeller balance scrap population.

How this compares with the baseline

  • Against the tool's baseline example, where target propeller balance scrap rate sits at 95% and the headline result is 3.2 %, this scenario lands almost exactly on the baseline at 3.2 %.
  • A figure at this level is achievable when target propeller balance scrap rate is genuinely sustained, not just peaked for a shift. It gives a scrap percentage from the counts you enter but does not separate scrappable failures from those recoverable by trim-balancing, so confirm your reject criteria before reading the rate as pure loss.

Results at a glance

  • Propeller balance scrap rate: 3.2 % (headline result)
  • Propeller balance scrap gap to target: 95.8 points
  • Propeller balance scrap count: 8 count
  • Total propeller balance scrap population: 250 count

Run it with your numbers

  • Every input above is editable in the live Propeller Balance Scrap calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.