bids are invited for stack flight controler - flight controller with f7 or h7 processor 4 in l electronic speed controller rated 50a 65a compatible with blheli 32 input voltage support 3s6s 22v max integrated barometer osd and blackbox minimum 16mb flash memory for flight data gps and telemet assthrou h su orted , air frame - size compatible with 7 inch propellers wheelbase 300 mm 320 mm material 3k carbon fiber layout deadcat or stretch configuration supports and mm mounting pattern desi n must allow gps camera and a load inte ration , video transmitter - operating frequency 5.8ghz switchable output power 25mw to 1000mw interface mmcx or sma connector voltage input 7v26v inte rated micro hone and heat dissi ation desi n , antenna rhcp - type right hand circular polarized (rhcp) operating frequency 5.8ghz gain 23 dbi connector sma or ufl must be durable with impactresistant casing , rc receiver - protocol expresslrs elrs or equivalent operating frequency 2.4ghz or 868915mhz ultra low latency and high telemetry update rate compatible with open source transmitter modules , battery - type lithium polymer lipo configuration 6s 22.2v nominal capacity 2200mah minimum discharge rating 75c or higher , elrs module - compatible with receiver stated above full expresslrs protocol support frequency hopping spread spectrum fhss technology o en source firmware su ort , gps module - protocol ubiox or nmea satellite systems supported gps glonass galileo integrated compass magnetometer minimum 15 satellite lock support compatible with gps rescue mode , camera - format analog fpv camera resolution minimum 1000tvl latency 16 ms lens 2.imm or wider size micro format 19 20mm width , motors - size 2507 to 2812 class kv rating 1200 1500kv 6s compatible shaft diameter 5mm motor mount pattern standard 16x16 mm ca able of liftin 850 a load cumulativel , propellers - diameter 7 inch pitch between 3.5 and 4.5 blade type bi blade or tr blade material reinforced polycarbonate hub com atibili m5