Elektra Two Solar OPS | UAs

solar-powered Unmanned and optionally piloted aircraft system

Based on Elektra Two Solar UAS the Optionally Piloted System (OPS) for stratospheric flight up to 24 km altitude and day-night missions.

Application

Able to fly with or without a pilot on board the aircraft, Elektra Solar Two OPS is an alternative to the UAS in research, experimentation, and concept exploration, but may also one day be used in mainstream operations. Two Elektra Solar Two OPS together or two Elektra Solar Two UAS can be used as a "remote eye" system. The first plane (P1) operates far away from the ground control station (GCS) and takes high resolution images from the ground. With a high-resolution camera, 3D images are recorded from the ground in the plane one (P1) and calculated on-board in real time.

The data of the 3D-model, together with the original high-resolution images are transmitted to the second aircraft (P2) using a laser link. As the aircraft P2 circles in the vicinity of the ground control station, it transmits the data to the ground station either by radio with automatically orienting directional antenna or via a second laser connection. In the ground station, the data is processed by a computer to form a complete 3D model of the area recorded by P1. The complete 3D model and high-resolution images are displayed to the operator at the ground station. Object recognition and tracking are integrated into the software of the ground control station in order to assist in the operation. An extension of the ground station software to support special missions is possible.

Description

Elektra Two Solar OPS was designed to be used as electric-solar airplane for stratospheric missions at 24 km altitude. In direct sunlight it is possible to fly day and night. The aircraft is equipped with a cockpit for a pilot. The autopilot system can be activated and deactivated by the pilot. Having a pilot, the autonomous operations without special permissions for UAVs are possible.

The power is provided by a combination of solar cells and rechargeable batteries. If the energy consumption of the engine is higher than the energy provided by the solar cells, the battery has to provide the additional energy. If the engine uses less energy than the solar cells provide, the batteries will charge until they are full.

The electrical power unit has double redundancy and is composed of two systems working parallel with each other. Each of the two systems consists of an electrical motor, motor controller and battery with battery management system. Two electrical motors are mounted on one shaft, forming a double-redundant engine unit. Control of the plane can be taken either from the cockpit and/or from the ground station. Each ordered Elektra Two OPS aircraft consists of the plane itself, a ground station, datalink, optional 2D or 3D optical system and software to evaluate data.

ELEKTRA TWO SOLAR UAS IS AN AIRCRAFT WITHOUT PILOT ABOARD.

Application

Based on Elektra Two Solar Standard and OPS the company offers the Unmanned Aircraft System also for stratospheric flight up to 24 km altitude and day-night missions like border control.

Elektra Two Solar UAS is an aircraft without a human pilot aboard. The unmanned version can be flown in countries where unmanned flights are allowed. Due to the lack of a pilot, the aircraft is lighter than the OPS variant. The whole system includes the aircraft, a ground-based control station and a system for communications between the two.

Description

The use of unmanned aircrafts has been rapidly expanding in the recent past to commercial, scientific, recreational, agricultural, and other applications, such as policing, peacekeeping, surveillance, product deliveries, aerial photography and agriculture. With the aid of a laser communication system or a radio system, data can be transmitted in real time over hundreds of kilometers.

Elektra Two Solar UAS was designed to be used as unmanned electricsolar airplane for stratospheric missions up to 24 km altitude. Takeoff and landing using a variety of sensors, flying back to the point of takeoff, GPS waypoint navigation and automatic roll and yaw control while moving horizontally are only a few characteristics which distinguish this aircraft. In combination with solar cells and state-of-the-art battery technology, it is possible to fly day and night.

The electrical power unit has double redundancy and is composed of two systems working in parallel. Each of the two systems consists of an electrical motor, motor controller and battery with a battery management system. Two electrical motors are mounted on one shaft, forming a doubleredundant engine unit. The plane can be controlled completely from the ground station.

Technical specs

Elektra TWO Solar

Available as “Unmanned Aircraft System”(UAS version) or “Optionally Piloted System” (OPS version).
Among other things, the aircraft serves as a platform for customer-specific payloads.

SPECS
OPS
(Optionally piloted system)
UAS
(Unmanned Aircraft System)
Seats
1
-
Electric Motor
32 kW (continuous)
32 kW (continuous)
Propeller speed for cruise
1.250 rpm
1.250 rpm
Wingspan
24,8 m
24,8 m
Wing Area
27 m²
27 m²
Solar cells
23,5 m²
26,5 m²
Maximum weight
600 kg
400 kg
Empty weight (w/o battery)
260 kg
220 kg
Battery weight
120 kg (30 kWh)
120 kg (30 kWh) / 160 kg (40 kWh)
Maximum payload
200 kg
120 kg
Maximum flight duration*
approx. 24 hours
almost unlimited
Range*
> 2000 km
almost unlimited
Cruising speed
75 km/h
70 km/h
Power needed for horizontal flight
2,2 kW
1,6 kW
Max. power provided by solar cells
> 5 kW (depending on altitude)
> 5 kW (depending on altitude)
Wing aspect ratio
23
23
Glide ratio
1:40
1:40
Maximum altitude
20 km (day) 5 km (night)
24 km
Certification
LFT-UL 2003 Germany
according to country-specific regulations
*Depending on wind conditions

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