Black Betty Stacked
397 lbs Lift Capacity! Multiple customizable modules available
Technical Specification
Model
Ceres Air C31
Configuration
4-axis, 8-blade
Dimensions
3635 mm x 3520 mm x 983 mm (143 in x 139 in x 39 in) (Arms & Propellers Extended)
2322 mm x 2184 mm x 983 mm (91 in x 86 in x 39 in) (Arms Extended, Propellers Folded)
1305 mm x 1170 mm x 983 mm (51 in x 46 in x 39 in) (Arms Folded)
Max Wheelbase
2768 mm (109 in)
Empty Weight (incl. battery)
120 kg (264 lbs).
Standard Takeoff Weight
240 kg (529 lbs)
Max Takeoff Weight (MTOW)
300 kg (660 lbs)
Standard Payload
150 kg (331)
Max Payload
180 kg (397 lbs)
Hovering Accuracy
RTK Positioning
Horizontal: ±10 cm (4 in), Vertical: ±10 cm (4 in)
Hovering Endurance (No Payload)
16 min
Max Hovering Endurance
(Full Payload)
5 min
Operating Temperature
-20 °C to 45 °C (-4 °F to 113 °F)
Ingress Protection (IP) Rating
IP55 (With battery connected)
Powertrain
Motor KV Rating
46 RPM/V
Motor Dimensions
140 x 34 mm (5.51 in x 1.34 in)
Rated Motor Power
4650 W each (x 8)
Rated Speed
2000 RPM
Main Rotor Diameter
1575 mm (62 in)
Number of Main Rotors
8
Main Rotor Material
Carbon Fiber
Energy System - Smart Battery
Battery Model
HE102 Secondary Lithium-ion Battery Pack
Charge Voltage
78.3 Vdc Max
Charge Current
140 A Max
Battery Energy
2,025 Wh
Cell Voltage
3.75 V
Number of Cells
18
Nominal Battery Voltage
67.5 V
Battery Weight
15 kg (33 lbs)
Installation Method
Quick-swap
Fast Charge Time
~10 min 25 sec (25% to 95%)
Building Firefighting Operational Parameters：
Tethered Hose Diameter
40 mm (1.6 in) / 50 mm (2 in)
Tethered Nozzle Diameter
50 mm (2 in) (12 mm orifice) (0.5 in orifice)
Max Tethered Altitude
80 m (262 ft) / 150 m (492 ft) (Water / Foam)
Water Jet Distance
10 - 20 m (33 - 66 ft)
Max Endurance
≥ 4 hours
Dual-Battery Operation
50 m (164 ft) altitude / 40 mm (1.6 in) hose mode: Effective aerial endurance of 11 min
Tethered Power Supply Parameters:
Airborne DC-DC Unit
Total Mass
≤ 30 kg (66 lbs) (including 150m cable) (492 ft)
Operating Temperature
-20 °C to 45 °C (-4 °F - 113 °F)
Altitude
0 - 3000 m (0 - 9840 ft)
Cooling Method
Forced Air Cooling
Ingress Protection (IP) Rating
≥ IP56
Input Voltage
1200 - 1500 Vdc
Output Voltage
70 - 75 ± 0.5 Vdc
Rated Total Power
≥ 60 kW
Rated Output Current
≥ 800 A
Peak Current
≥ 900 A
Output Efficiency
≥ 97%
Voltage Regulation Accuracy
± 1%
Output Connectors
8 (Referring to aircraft connectors)
Output Cable Diameter
6 AWG
Output Over-Voltage Protection (OVP)
78 - 80 V, Self-Recovering
Input Under-Voltage Protection (UVP)
Yes
Input Over-Voltage Protection (OVP)
Yes, Self-Recovering
Overtemperature Protection
Yes
Short-Circuit Protection (SCP)
Yes, Self-Recovering
System Noise
≤ 60 dB
Ground-Side Tethering Box
Operating Temperature
-20 °C to 45 °C (-4 °F - 113 °F)
Altitude
0 - 3000 m (0 - 9840 ft)
Input Voltage
260 - 530 Vac, 3L+PE
Rated Input Current
120 A
Output Voltage
1200 - 1500 Vdc
Output Current
≥ 50 A
Rated Output Power
70 kW
Cooling Method
Forced Air Cooling
Ingress Protection (IP) Rating
IP55
Base Bracket (Fixed bracket for agricultural drone water tank, featuring two crossbars with water gun mounting ports)
The water lance measures 150 cm (59 in) in length with a 40 mm (1.6 in) diameter, featuring a 12 mm (0.5 in) nozzle orifice, a dual-channel design (with the lower gold-colored port serving as the inlet and the silver-colored port as the outlet), and is constructed from carbon fiber.
Based on the on-site demonstration, the following conclusions were drawn:
1. When used for urban high-rise firefighting, the firefighting drone must be connected to a fire engine to pressurize the water stream. Therefore, their primary promoted scenario involves the Fire Emergency Management Center (selling the vehicle and drone as a package). The drone cannot operate independently as a single unit.
2. When operating on its own battery, the drone has a flight time of only 4 min at an altitude of 100 m (328 ft), and approximately 12 min when hovering at around 50 m (164 ft) (slight margin of error).
3. The primary operation method currently relies on a ground-based tethered power supply. However, this is costly as it requires voltage conversion equipment both on the ground and onboard the aircraft.
4. When supplied with water pressure of 1.5-2 MPa from a fire engine, the water stream range is within 20 m (66 ft). When using a portable pressure supply unit, the range is about 30 m (98 ft) with a 5 m (16 ft) spread.
5. The manual control interface utilizes the 5150 operation interface. An additional power alarm feature has been integrated because, as a hose is attached, electronic weighing isn't possible. The system instead uses motor power draw as a warning for potential overload conditions.
Portable water pump (0.5 MPa water pressure)
