1. Congratulations…Welcome to UTHM PARIT RAJA….A Place To Be..
DR. ZAMRI BIN OMAR Department of Aeronautical Engineering Faculty of Mechanical & Manufacturing Eng. Phone : /7711 Room: C & A4, 2nd Floor

2. ~Conceptual Design basic configuration ? basic size & weight ?
basic performance ?
involves various design alternatives & trade studies
involves continuous/iterative changes/improvement
Can any affordable aircraft be built that meets the requirements ?
Design requirements to guide & evaluate the overall config.
Interactions among all components are crucial !
Practically, it takes years to create a good conceptual design !

3. ~Extreme !

4. ~Conceptual Design 7 Pivot Points in Conceptual Design 1. Requirements
2. Sizing : Airplane weight (First estimation)
3. Critical performance parameters
4. Configuration layout
5. Sizing : Airplane weight (2nd estimation)
6. Performance analysis
7. Optimization

6. Conceptual Design ~1) Requirements
Requirements for a new airplane are unique.
Generally, for any new airplane design;
motivated by some established requirements
RFPs by stakeholders, govts, military, etc..
Customer request.
Most GAs ~new design set by manufacturers.
GAs ~ manufactures really studied their
customer needs.
You, as the potential aircraft designer &
manufacturer ~ is given with the Request For Proposal  RFP

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

8. ~(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.

9. ~(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..

10.  (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

11. For our 1st estimate, we choose;

12.  (2.2) Estimation of Wf/Wo
Statistics;
Airplane (L/D)max
Cessna
Beach Bonanza
Cessna Cardinal
Reasonable approx for our airplane  (L/D)max = 14
Use Brequet’s range eqn;
Based on mission profile;
(2)

13.  (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 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 = gal = 661 litres ?

14.  TODAY’S ACTIVITY Group discussion Read the RFP, understand it..
Do the parametric study on airplane gross weight.
AIRCRAFT TYES
Business jet (passengers<10)~Hazman, azizan
Wide-body aircraft (passengers <200, jetliner)~Hafiz, amal
Light aircraft (passenger > 4, MTOW<5670 kg)~Arif,hendra
Mircolight/Ultralight aircraft (2 passengers, MTOW<500kg)~Fikri, ruzaini
Amphibian aircraft (MTOW<5670 kg)~Raudhah, wan syahmi
Fighter Aircraft (2 passengers) ~ Jaswant, wan ahmad