Would someone be able to enlighten me as to the endurance of a 109 Grande, I'm talking in HEMS configuration with Doc and paramedic ofcourse. Interested to know how they compare to the other UK type machines(135,902,117).
Not seen a HEMS version in UK but from some other role experience of the 'S' version:
Max. gross aircraft weight is 3175 kgs and it has Class A performance at 3175 kgs in a temperate climate.
The basic weight is about 2120 Kgs.
Up to approx 640 kgs of fuel.
Fuel burn with ECS on is about 225 kgs/hr at 150 kts cruise (slightly less ECS off and decreasing slightly with weight reduction, or keep the fuel burn up and enjoy the cruise speed increasing towards 160 kts).
With three crew and one casualty (estimate 90 kgs each?) plus 50 kgs for baggage / equipment you should get full fuel on board, so expect somewhere around 2.75 hours to 3 hours cruise flying.
If you mean flying / loitering at endurance speed, look to 3.5 hours plus.
This is a good, potent aircraft for good speed, good range and excellent OEI performance, but as already pointed out, the cabin would be cramped for a stretcher case despite the extra length over the earlier models.