Avit 323 Block 10 Exam: Thrust Questions and Answers 100% Pass

Avit 323 Block 10 Exam: Thrust Questions and Answers 100% Pass thrust - -must be generated to overcome the natural resistance of drag -newton's third law >"for every action there is an equal and opposite reaction" unaccelerated - means the airplane neither speeds up or slows down, but remains at a constant velocity accelerating - if thrust is greater than drag, the speed would increase - as speed increases so does drag - it will build until it equals the new drag and we will once again be unaccelerated deceleration - initially drag is greater than thrust (speed), but as we slow drag decreases until it reaches equilibrium with thrust propellers: rotating airfoil - subject to stalls, induced drag, and other troubles that affect airfoils thrust equation - newton's second law of motion 2Brittie Donald, All Rights Reserved © 2025 f=ma propeller driven airplanes - large mass of air accelerated to relatively low final velocity propeller: thrust available - -propeller is an airfoil -not 100% efficient -produces induced and parasite drag -affected by airflow disturbed by other blade increase in forward velocity - -angle of attack of blade decreases -thrust decreases fixed pitch prop - peak efficiency at one airspeed constant speed prop - -more blade settings -greater range of efficiency reciprocating aircraft engine - -power producing machine -fuel flow directly proportional to power output Output Power of an Engine: PLANK - P-indicated effective pressure (psi) L-length of stroke in ft or fractions of ft 3Brittie Donald, All Rights Reserved © 2025 A-area of the cylinder (sq. in.) N-number of power strokes per min K-number of cylinders non-geared, direct drive engine - BHP = SHP thrust horsepower - power that is imparted by the propeller to the air Propeller efficiency - always less than 100% power = - force x velocity fixed pitch propellers: climb - lower pitc