Airspace
Cross Country
Part 61
Airworthiness
Aerodynamics
100

This simplified mnemonic describes the weather minimums required for many different airspace, including class E, D and C. 

3 - 152

100

When traveling on an Easterly course, this is general rule of thumb for choosing cruising altitudes. 

Odd +500

100

According to 61.57, this would be required in order to carry passengers during day time hours.

3 takeoffs and landings in the preceding 90 days. 

100

This common acronym will assist any pilot in remembering the aircraft documents they need on board for each flight. 

A.R.R.O.W.

100

Lift is the one force acting on an airplane that is perhaps most apparent. These are the other three. 

Weight, Thrust and Drag.
200

This is the standard vertical limit of Class C airspace.

4,000 AGL

200

Under part 91, this is the VFR minimum fuel requirement for daytime flight.

30 minutes

200

61.56 discusses this required currency item that needs to occur no less than every 24 calendar months. 

Flight Review

200

This common acronym is used to assist in remembering the required inspections an aircraft must undergo. 

A.V.I.A.T.E.S. 

200
We can always count on ground effect to help reduce this type of drag. 

Induced.

300

This is the altitude of the floor of Class E airspace in the majority of the continental US. 

1200 AGL

300

This figure depicted on the VFR sectional chart advises the minimum altitude required to stay clear of obstructions by a minimum of 300 feet, or 100 feet if that obstruction is man-made. 

Minimum Elevation Figure (MEF)

300

The endorsement required by 61.31(e) to act as PIC of a complex aircraft would allow a pilot to fly an airplane with these three things. 

Constant speed propeller, retractable landing gear, flaps. 

300

A 100-hour inspection is required on an aircraft when used for flight instruction only under this one condition. 

The flight instructor is providing the aircraft.

300

As an aircraft accelerates, the induced drag it experiences is reduced and is replaced by this "form" of drag.

Parasite

400
Of all the requirements to enter a given airspace, this one is unique to Class A and B. 

A Clearance

400

While it may not be feasible in your Cessna 172, cruising at any altitude above 12,500 would come with this additional consideration when planning a flight.

Oxygen Requirements
400

The landings required to carry passengers at night or in a tailwheel aircraft share this distinction. 

Landings must be to a full stop.

400

The inspection of the static system as required by 91.411 is only required under these flight rules. 

Instrument (IFR)

400

A stall can occur at any airspeed or attitude, but at only one of these. 

(Critical) Angle of Attack

500

This is the speed limit in a Class B VFR corridor.

200 Knots

500

For the purpose of pursuing most certificates or ratings in an airplane, a cross country would not be valid unless it was in excess of this distance from the original point of departure.

50 NM

500

Prior to soloing in a Cessna 172, a student pilot needs to ensure they have their logbook with appropriate endorsements, government issued photo ID and this other document. 

Student Pilot Certificate

500

Out of all the instruments that could be required for a given kind of flight, this one six-pack instrument is never among them.

Vertical Speed Indicator

500

The lift equation, as confusing as it might be, can be simplified and broken down into these four components.

CL, Fluid (air) velocity, Fluid (air) Density, Area of airfoil.