Revolectrix Dual PowerLab 8x2 User Manual

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Estimating performance factors
If you don’t have a way to directly measure your propulsion system’s electrical
parameters, Dual PowerLab 8x2 enables you to estimate them using before-and-after
flight measurements.
1. Collect data.
a. Charge pack.
b. When charging is finished, record Fuel % and total pack voltage (i.e. sum of cell
voltages).
c. Fly plane (or test on the ground). Record flight time in minutes.
d. Connect pack to charger. Record Fuel % and total pack voltage.
2. Calculate performance factors.
The “LiPo Performance Estimator” spreadsheet can also be downloaded from the
Tech Docs section of the software downloads page of the REVOLECTRIX website.
3. Evaluate results.
 Average current during flight gives you a rough idea whether system com-
ponents—ESC, motor, connectors and wiring—are operating within their current
ratings. Keep in mind that peak current during flight may greatly exceed the aver-
age current you calculated.
 Watts per pound is an approximate indicator of aircraft performance (other factors
influencing performance include lift, drag and motor type). Here are some guide-
lines: 
 25 to 30 watts per pound: level flight.
 40 to 50 watts per pound: take off from smooth surface, climb.
 50 to 75 watts per pound: take off from grass, sport aerobatics.
 75 to 125 watts per pound: pattern aerobatics.
 Over 125 watts per pound: 3D.
Note: The calculations outlined below work best when the pack is charged
using a custom fuel table. They may be invalid if the fuel table does not match
the pack under test.

Revolectrix Dual PowerLab 8x2 Specifications

General

Brand	Revolectrix
Model	Dual PowerLab 8x2
Category	Battery Charger
Language	English