Engineering:RADI IRSA

IRSA (中遥, Zhong-Yao or Zhongyao) UAVs are Chinese UAVs developed by Tianjin (ChinaRS, 中科遥感信息技术有限公司) of Institute of Remote Sensing and Digital Earth (RADI, 中国科学院遥感与数字地球研究所) of Chinese Academy of Sciences. IRSA UAVs are derivatives of RADI Quick Eye UAVs and both series share the same airframs.

IRSA I

IRSA I is the first UAV developed by ChinaRS, and it is a fixed wing UAV intended for aerial cinematography, photography and survey missions. Development was completed in 2006 and the UAV entered the service the same year. IRSA I has retired and replaced by more advanced follow-on UAVs developed by ChinaRS.

IRSA II

IRSA II is fixed wing UAV in conventional layout with high wing configuration. Propulsion is provided by a two-blade driven tractor engine mounted in the nose. IRSA II share the same layout with another RADI UAV, the RADI Quick Eye I, and the only external difference is in the landing gear: the pair of skids in Quick Eye I is replaced by tricycle landing gear system in IRSA II. Other difference includes slight improvement in performance. Specification:

• Wingspan (m): 2.6
• Length (m): 1.8
• Height (m): 0.5
• Wing area (m²): 0.9
• Payload (kg): 2.5
• Empty weight (kg): 11
• Fuel (L): 3
• Max take-off weight (kg): 14
• Propeller diameter (m): 0.6
• Max speed (km/h): 140
• Cruise speed (km/h): 100
• Ceiling (km): 3.5
• g-overload: 4.5 g
• Rate of climb (m/s): 5
• Endurance (min): 100
• Max range (km): 150
• Standard operational range (km): 110
• Engine: gasoline powered
• Fuel consumption (ml/min): 22
• Max wind speed allowed for operation (m/s): 13
• Max wind scale allowed for launch and recovery: 5

IRSA III

IRSA III is the third UAV developed by ChinaRS, and it is an UAV in conventional layout with high wing configuration, and propeller is driven by a two-blade propeller driven tractor engine mounted in the nose. IRSA share the same layout of with another RADI UAV, the RADI Quick Eye III. Specification:

• Length (m): 2.3
• Wingspan (m): 3
• Height (m): 0.49
• Wing area (m²): 1
• Empty weight without fuel (kg): 6
• Fuel (L): 9
• Fuel consumption (L/h): 2.2
• Payload (kg): 8
• Payload capacity (L): 18
• Max take-off weight (kg): 28
• Rate of climb (m/s): 5
• Max speed (km/h): 150
• Cruise speed (km/h): 120
• Ceiling (km): 6.5
• g-overload: 4.4 g
• Endurance (min): 3 – 4
• Max range (km): 400
• Standard operational range (km): 250
• Engine: gasoline powered
• Max wind speed allowed for operation (m/s): 15
• Max wind scale allowed for launch and recovery: 5
• Control radius (km): 200
• Launch: taxiing or catapult
• Recovery: taxiing or parachute

IRSA IV

IRSA IV is a twin engine UAV in twin boom layout with tricycle landing gear developed by RADI. IRSA IV share the identical airframe of five other Chinese twin engine UAVs: Iflyer Hunter, RADI Quick Eye IV, Oriental Titan Titan III, UAV Sci-Tech Telemetry IV and ZWYX YX-3, so that all six Chinese UAVs have identical appearance. What differs them from each other is that their respective flight control systems (FCS) are completely different from each other, being separately developed their respective developers independently. IRSA IV has a pair of two-blade driven propeller engines respectively mounted at the nose and rearend of the fuselage. Specification:

• Length (m): 2.6
• Wingspan (m): 3
• Height (m): 0.48
• Wing area (m²): 1.1
• Empty weight without fuel (kg): 8
• Fuel (L): 8.4
• Fuel consumption (L/h): 4.5
• Payload (kg): 12
• Payload capacity (L): 15
• Max take-off weight (kg): 38
• Rate of climb (m/s): 5.5 @ full load
• Max speed (km/h): 135
• Cruise speed (km/h): 110
• Ceiling (km): 5
• g-overload: 5 g
• Endurance (min): 2 – 3
• Max range (km): 250
• Standard operational range (km): 180
• Engine: gasoline powered
• Max wind speed allowed for operation (m/s): 17
• Max wind scale allowed for launch and recovery: 5
• Control radius (km): 200
• Launch: taxiing
• Recovery: taxiing or parachute
• Take-off distance @ full load (m): 70
• Landing distance: 150

See also

List of unmanned aerial vehicles of the People's Republic of China