eJetyak
Jetyak Capability + Electric Drive
eJetyak is the ideal platform where basic Jetyak utility and performance are required but where internal combustion engines are either impractical or unfeasible. It shares many of the advantages of the 4-stroke Jetyak, but can be deployed in areas where gas-powered watercraft are either prohibited, or where engine noise emission profiles would interfere with data collection.
Retains the same hull construction, modularity, mass, overall dimensions, propulsion of a standard Jetyak
Maintenance-free brushless DC electric drive
High-performance / high-Capacity Li-ion Battery & Charging System
Two-stage active cooling loop for motor (stator) and speed control (ESC)
Zero emission operation & zero risk of oil or fuel contamination into study area
Hull Type
Same as Standard Jetyak: UV stabilized rotomolded high density polyethylene; 3-piece design for ease of transport; all cabling from main to tail sections via waterproof connectors.
Sensor Payload
Capable of carrying the same payloads as a Standard Jetyak, as well as special-missions payload options.
Specifications
Physical
Same as Standard Jetyak
Electrical
Motor Power: 18kW rated; 7.2 / 14.4kW operating (single / dual battery)
Battery System: Fully intelligent 51V nom (42-57V) Li-ion; 3 kW/Hr; CAN bus controlled; multi layer protection (internal fusing, HW&SW BMS); GC2 (T-105) form factor; 120A max. cont. discharge Current; 15.4 kg mass.
Cabling: IP67 cables and connectors for all power, control and data lines
Cooling
Active twin-circuit heat exchanger: non-toxic anti-corrosion / anti-bacterial closed-loop circuit for motor & ESC; coolant heat rejection via open-loop seawater circuit feed from Jet Drive
Capability
Mission Payload Capacity: 280 lbs / 127 kg
Typical Endurance1: 5 Hrs @ 4 kt / 2 m/s
Max Survey Speed: 6 kt / 3 m/s
Max Cruise Speed: 16 kt / 8 m/s
Max Wind: <15 kt / 7.5 m/s in open ocean, < 25 knots / 13 m/s in fetch limited environments
Sea State2: 4
1Endurance taken at @ 2m/s survey speed and a single 3 kWh battery capacity. Endurance approx. doubles with the addition of a 2nd battery
2Max Wave Height depends on wave period and amount of breaking; see NWS Beaufort Scale
Vessel Positional Accuracy
Standalone 3D Fix3: 2.5 m CEP; RTK: 2.5 cm
3RTK position accuracy relative to a stationary RTK Base + 1 PPM; dependent on GNSS constellation