bids are invited for airframe - provide stable flight with mtow sufficient to carry 3 kg payload plus avionics meeting endurance of 30 min at mission payload support modular mounting points for payload and antennas , radio controller - maintain full-duplex telemetry and hd video to a minimum 5 km los auto-reconnect after brief outages latency suitable for manual framing , flight controller - execute stabilized, altitude, position hold, waypoint, and loiter modes, log flight data support configurable geofence and return-to-launch rtl , gnss system gps - use multi-constellation gps,glonass,galileo,beidou with sbas provide hdop status to gcs cold start 60 s typical , camera - integrated day and nightcamera, 30 times digital zoom in day , and autofocus, manual focus, 1080 p or better video at 25 fps. ir imaging at 640 by 512 px with 25 fps, , 4 times electronic zoom , motors - provide thrust-to-weight margin 2 ratio 1 at mtow, support continuous operation for mission profile without overheating. , esc - support required motor current with thermal protection, soft start, and active braking, accept pwm, dshot as per fc , propellers - deliver efficient thrust with low vibration be balanced and field-replaceable without re-tuning. , battery - power aircraft for 30 min with 3 kg payload under isa conditions and nominal winds provide voltage telemetry and low-battery rtl. , battery charger - charge supplied batteries with cell balancing, over-voltage and over-temp protection ac input 180 to 265 v. , carry bag case - be assembled by one persons in 5 min, it into 1 rugged case total quantity : 3350