A VTOL aircraft, being a hybrid of a quadcopter and an airplane, has some
power supply features, unlike classic airplanes and copters. When planning
a flight, it is necessary to take into account that VTOL aircraft consume the
battery differently during takeoff, landing, hovering and cruising flight (see
information)
It is recommended to choose open spaces without houses or power lines for
flights. You must avoid dangerous/prohibited areas along the route.
In difficult weather conditions (rain, snow, wind more than 5 m/s), a decision
on a flight must be made after assessing all existing risks of losing the
aircraft.
On average, battery consumption in hovering, takeoff and landing modes is 3
(three) times greater than flying in airplane (cruising) mode.
Therefore, the operator must estimate in advance the available battery
capacity in watt-hours and distribute it into at least two parts to prevent
overdischarge and loss of the aircraft:
take-off / landing
1.
route flight
2.
Example of the energy rating for a typical flight:
Battery installed 4500 mAh (4.5 Ah), voltage
22.2 V
,
its capacity: 22.2*4.5=
99.5 Wh
Takeoff/landing takes an average of 4-5 minutes of flight time
time, with a power of
370 W
, (5/60) * 370 =
31 Wh
, which will be:
31/22.2=1.4 Ah=
1400 mAh
.
Remains for horizontal flight: 99.5-31=
68.5 Wh
Level flight time estimate: (68.5/120)*60=
34 minutes
Estimated distance in level flight at an average speed of
70
km/h
: 34/60*70 =
~40 km
Capacity spent during horizontal flight: 68.5/22.2=
3085 mAh
The above calculation is approximate; the operator must constantly
monitor the amount of mAh spent on the ammeter meter, and in no
case allow the battery to be overused and the voltage to drop below
18V.
It is recommended to plan a reserve of 500 mAh for unforeseen
circumstances (wind, maneuvers)
To simplify the assessment of battery consumption, you can use the
following rule: leave at least 25% of the total battery capacity for
takeoff/landing and 10% for unforeseen circumstances.
Discharge Li-po battery below 3.2 volts per cell, and Li-Ion
1.
below 2.8 volts per cell.
Go beyond the specified battery capacity on the ammeter
2.
meter.
Fly for a long time with a current exceeding 35 amperes to
3.
avoid overheating of the battery.
Use discharged, unbalanced or faulty batteries.
4.
ATTENTION!
Prohibited:
23
Battery consumption planning
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