OAR case studies
OAR · Put your knowledge to work in context.
The Officer Aptitude Rating (OAR) is a score reported by the Aviation Selection Test Battery (ASTB), the battery the U.S. Navy and Marine Corps use when screening applicants for officer commissioning programs, most visibly aviation and naval flight officer slots but also several other designators. The OAR case studies are 5 cases and about 2,909 words.
1Fuel Planning: Fitting a Fourth Leg Into a Fixed Fuel Budget
A crew is planning a three-leg survey sortie in a twin-engine aircraft with 320 gal of usable fuel. Planned cruise fuel flow is 52 gal/hr, except for leg 2, which must be flown at low altitude where flow rises to 58 gal/hr.
571 words, about 3 min2Refueling Throughput: Two Trucks, One Deadline, and a Changed Requirement
The fuel line at a small airfield has two refueling trucks. Truck A delivers 220 gal/min; truck B delivers 180 gal/min.
537 words, about 3 min3Conflicting Inspection Intervals: Reading a Directive Chain
Maintenance Directive 4.2, dated 3 March, states in paragraph 5: 'Corrosion inspections shall be performed at intervals not to exceed 90 days.' Change 1 to Directive 4.2, dated 19 May, states in full: 'Paragraph 5 is amended to read: 120 days for aircraft kept in indoor storage; 90 days for all other aircraft. No other paragraph is affected.' A base supplement dated 2 June states: 'This supplement governs base-level practice.
674 words, about 3 min4Rescue Hoist: Torque, Efficiency, and a Comfortable-Looking Number
A rescue hoist is being evaluated for a new helicopter fit. The electric motor produces 40 N·m of torque at its output shaft.
548 words, about 3 min5Holding a Cart on a Ramp: Strap Angle and Rating
A 900 kg equipment cart must be parked on an inclined cargo ramp while an aircraft is loaded. Rolling friction is negligible.
579 words, about 3 min