Formula: {Payload_xi = between ca. (7,20) kg = ca. (15,45) lbs}


Payload #1: provides the maximum flight time with maximum amount of liquid hydrogen and five sensors to drop
~ rack #1 loaded with five (5) Sensors4Xi
~ rack #2 containing LH2 tank - external liquid hydrogen storage tank
~ weight: 0.738 kg × 5 + 15.9 kg = ca. 20.0 kg = ca. 44.0 lbs

Payload #2: - provides the maximum number of sensors to be dropped with the liquid hydrogen in the internal tank
~ rack #1 loaded with five (5) Sensors4Xi
~ rack #2 loaded with five (5) Sensors4Xi
~ weight: 0.738 kg × 5 × 2 = ca. 7.0 kg = ca. 15 lbs

Payload #3: - provides the maximum electric power with five MH2 tanks and five Sensor4Xis (each embeds fuel cells)
~ rack #1 loaded with five (5) sensors, each Weight_Sensor4Xi
~ rack #2 loaded with five (5) MH2 Tank
~ weight: 0.738 kg × 5 + 2.5 kg × 5 = 16.2 kg = 35.6 lbs

Xi may also carry optional devices inside:
~ Weight_xi i.e. some of Xi's optional hardware can be considered as a payload

catch ~Payload_XCopter ~Xi!