There should be enough fuel to fly to the first intended point of landing, plus a 20-minute reserve. Rotorcraft have the same fuel reserve requirements for day or night VFR flight.
A delta-3 hinge is a hinge that is not at a 90-degree angle, it is offset to some degree.
The pitot static system consists of the instruments used for determining aircraft’s speed, altitude, and altitude trend (or change in altitude).
If the pitot tube is clogged, the airspeed indicator will no longer work properly.
If the static port is clogged, all pitot static instruments will provide incorrect readings.
Most piston-powered helicopters have dual magnetos so that if one magneto fails in flight, the engine will still operate.
The most common types of aviation fuel are 100LL [low lead] and Jet A.
The owner or operator is responsible for maintaining the aircraft in an airworthy condition.
At a minimum, all aircraft need an annual inspection. If the aircraft is used for hire, a 100-hour inspection is needed as well. Depending on aircraft, the transponder and pitot-static system may need to be inspected as well.
The transponder needs to be tested every 24 months.