"...The Hermes has an exceptionally high payload to weight ratio – up to 33% or the 450 kg are payload. Hermes 450 carries a typical EO payload such as the COMPAS IV weighing 32 – 35 kg and a SAR, at around 40kg weight. The remaining weight is fuel, and supporting systems. The Hermes 450 can carry two payloads simultaneously. On extended missions, Hermes 450 can carry two external fuel tanks or equivalent stores. The extra fuel extends mission endurance up to 28 – 30 hours..."
