Congratulations…Welcome to UTHM PARIT RAJA….A Place To Be.. DR. ZAMRI BIN OMAR Department of Aeronautical Engineering Faculty of Mechanical & Manufacturing Eng. Email : zamri@uthm.edu.my Phone : 4537618/7711 Room: C08-106 & A4, 2nd Floor

Conceptual Design ~ A Case Study Design of A Propeller-Driven Airplane

~(1) The Requirement To design a light, business transport aircraft, pressurized cabin. Max level speed at midcruise weight : 250 mi/hr No. of passengers : 5 (+pilot) Range : 1200 miles. Ceiling : 25,000 ft. Rate of Climb at sea level: 1,000 ft/min. Stalling speed : 70 mi/h. Landing distance (to clear 50 ft obstacle) : 2,200 ft. Takeoff distance (to clear 50 ft obstacle) : 2,500 ft.

~(2) Weight ~1st Estimation The takeoff gross weight, Wo; -------------------------(1) Wc : crew weight (pilots, cabin crews) Wp : payload weight. Passengers, luggage, freight, etc.. Wf : fuel weight. We : empty weight. Airframe, engines, avionics, systems, equipments, etc..

 (2.1) Estimation of We/Wo Evolutionary of previous existing airplanes  A New Airplane Needed : historical, statistical data of previous airplanes (parametric study) airplanes from 1930 - 2000

For our 1st estimate, we choose;

 (2.2) Estimation of Wf/Wo Statistics; Airplane (L/D)max Cessna 310 13 Beach Bonanza 13.8 Cessna Cardinal 14.2 Reasonable approx for our airplane  (L/D)max = 14 Use Brequet’s range eqn; Based on mission profile; -------------(2)

 (2.2) Calculation of Wo and Wf One-crew airplane  Wc = 170 lb Payload; 5 passengers + 20lb baggage per person + pilot baggage;  Wp = 5(170)+20(6) = 970 lb. From Eqn. (1) See the 4.525 amplification factor ! From eqn (2), Weight of avgas is 5.64 lb/gal. So the tank vol should be; Tank volume = 820 lb/5.64 = 145.4 gal = 661 litres ?

 TODAY’S ACTIVITY Group discussion Read the RFP, understand it.. Do the parametric study on airplane gross weight. AIRCRAFT ?? Light aircraft Regional Jet 070313 assigment: 2 bdm. Dateline for Wo estimation is next Thursday (14/3/13)