SAMSON started its electric adventure. Being the first motorized aircraft entirely propelled with hydrogen, then the first two-seater electric trike, we benefit from an advanced experience in electrical technology. The growing demand for this type of machine requires some clarification to guide user choices. Two electrical technologies are to be distinguished: that supplied by a battery and that produced by an alternating source. While alternative source technology is on the rise through the fuel cell, it remains experimental to this day because the supply of hydrogen remains complicated. We have chosen to wait until the hydrogen supply chain is more mature before offering this technology to the general public. On the other hand, the battery technology being already proven and in place, we can offer different solutions, the choices of which we clarify below. These are guided by compromises between autonomy, weight, cost and power.
We can offer 5 different motors to date with power output of 12, 16, 20, 32 and 50Kw. (1Kw = 1.35962Cv). Whichever engine is chosen for the same takeoff weight it will consume (approximately) the same amount of energy. Thus a 12Kw propelling a SAMSON of 190kg PTV (Total Flying Weight) will consume as much energy as a 32kw propelling a SAMSON of the same PTV, on the other hand if the user were to need more energy, the 12KW motor would be limited to 12Kw while that of 32 could provide more (and by the same to consume more).
The LI-Ion batteries that we currently use to power the motors come in 15.5kg packs and have an energy density ranging from 3.1 to 3.5 Kwh / Pack. A SAMSON pendulum mounted on a SAMSON 12 flexible wing can fly about 2 minutes per kg of battery carried in a single-seater and 1 minute per kg in a two-seater. A battery pack will therefore be able to fly a SAMSON of 190kg PTV for 30 minutes while cruising or 15 minutes at 270kg engine at full speed). The batteries can only deliver a certain power and therefore for more powerful engines it is automatically necessary to put more to exploit all their power. However, the more batteries you put in, the more you increase the PTV and therefore the more power you need. This is where the compromise is to find a machine that suits your needs. To meet the requirements we have two types of batteries. Those which can provide a lot of energy at once to limit the load weight and deliver sufficient power, and those which deliver less power but have more energy to fly for longer. It goes without saying that the lighter the pendulum and the more efficient it is, the less energy it consumes. Below are some combinations to guide your trends:
12Kw for single-seater flight only. 1 high-discharge battery to hook up the first thermal or 2 or 3 high-density batteries to extend the flight (1battery = 30 minutes of flight = 15.5kg)
16Kw for intense single-seater flight, very occasional two-seater depending on the wing and the weight carried. 2 high minimum discharge batteries or 3 high density batteries.
20Kw for occasional tandem flight, with 3 high-discharge batteries or 4 high-density batteries
32Kw for sluggish tandem flight, with 4 high discharge batteries