1. Charlie Rush Zheng Wang Brandon Wedde Greg Wilson
System Definition Review
AAE 451 Team V
Stephen Beirne
Miles Hatem
Chris Kester
Jim Radtke
Charlie Rush
Zheng Wang
Brandon Wedde
Greg Wilson
The Flying V Barn Owl

2. Outline Target Market Current Design Requirements Trade Studies
Sizing
Cost
Concept Development
Current Design
Alternative Fuel
Concept Evaluation
13 May 2019
AAE 451 Team V

3. General Aviation Market Review
Product
4 Seat Single Engine Piston Aircraft for Hobbyists, Training Fleets, and Fixed Base Operators
Powered by an Alternate Fuel
Customer Needs
100LL Replacement
Current staple fuel for GA piston engines
Production uncertain after 2015
Provides opportunity to be first to market
Petroleum fuel alternative for post peak oil
13 May 2019
AAE 451 Team V

4. Current Design Requirements
≤ 1500 ft takeoff distance to clear a 50 ft obstacle
600 lb payload with max fuel
150 kts max cruise speed
600 nm range
≥ 48”x46” cabin height x width
Estimated GTOW of 2780 lbs
Estimated base price of ~$316,000 ($2006)
13 May 2019
AAE 451 Team V

5. Trade Studies
All trade studies were done assuming by varying one of the following and keeping the remainder at the base value shown
Range (600nmi)
Cruise Speed (150 kts)
L/D (12)
Payload weight (450 lbs, +150 for pilot)
Prop efficiency (0.9)
bhpSFC (0.42)
Empty weight fraction was based on a nonlinear regression curve fit of a database of similar aircraft
Fuel fraction was calculated from a series of weight fractions for our design mission
13 May 2019
AAE 451 Team V

6. Trade Studies (cont.)
13 May 2019
AAE 451 Team V

7. Trade Studies (cont.)
13 May 2019
AAE 451 Team V

8. Trade Studies (cont.)
13 May 2019
AAE 451 Team V

9. Acquisition Cost Trade Study
Three cost estimating relationships:
GA Plane Library
Modified DAPCA
Airframe Weight Relationship.
Average yields purchase price of ~$316,000.00
13 May 2019
AAE 451 Team V

10. Acquisition Cost
13 May 2019
AAE 451 Team V

11. Concept Generation and selection
Pugh’s method
List criteria
Brainstorm concepts
Evaluate and iterate
Criteria:
Engine Power
GTOW
Cruise Speed
Safety
Airport Compatibility
Price
Payload
Pizzazz™
Stability
Fuel Consumption
Aesthetically Pleasing
13 May 2019
AAE 451 Team V

12. A Few Initial Concepts
13 May 2019
AAE 451 Team V

13. Concepts Generated after two Pugh Iterations
Concept A
Concept B
Landing Gear
Fixed Gear/Faring
Tricycle Gear
Wing
Low Wing
Low Wing with Winglets
Straight Wing
Tail
Conventional Tail
Cockpit Avionics
Analog Cockpit
Glass Cockpit
Construction Al
Al frame composite skin
Propeller
Fixed Pitch
Variable Pitch
Fuel
Bio Diesel
13 May 2019
AAE 451 Team V

14. Current Main Concept Three View
13 May 2019
AAE 451 Team V

15. Cabin Three View
13 May 2019
AAE 451 Team V

16. Fuel Choice SFC Numbers for selected Alternative Fuels
Bio-Diesel is our fuel of choice!!
Fuel
SFC (lbs/hp*hour)
Diesel #2
Bio-Diesel B100
Ethanol
Methanol
0.7067
Liquid Hydrogen
0.1269
13 May 2019
AAE 451 Team V

17. Information From Existing Diesel Engines
Range of Brake Specific Fuel Consumption: 0.36 – 0.40 lbs/hp*hr
Weights range from 185 lbs – 350 lbs
Power ranges from 135 hp – 300 hp
13 May 2019
AAE 451 Team V

18. Relationship between Engine Weight and Power
13 May 2019
AAE 451 Team V

19. Design Space Determination
Design Point
13 May 2019
AAE 451 Team V

20. Current Design GTOW (lbs) 2780 LOA (ft) 26 Wingspan (ft) 36
Swing (ft^2)
115
W/S (lb/ft^2)
24.1
P/W (ft/s)
0.0706
sTO (ft)
740
Vcruise (kts)
150
horsepower
~200
Acquisition Cost
$316,000
Bio-diesel powered
Low tapered wing with winglets
Conventional tail
5 deg tail upsweep
13 May 2019
AAE 451 Team V

21. Concept Evaluation Design Requirements Concept A Concept B
Cirrus SR 22
 T/O Distance <1500 + -
600 lb Payload 
150 kts cruise speed 
600 nm range 
48”x46” cabin dim.
 <2800 lb GTOW
Acq. Cost <$300k  -   -
13 May 2019
AAE 451 Team V

22. Synopsis Four-Seat Single-Engine Piston Prop GA Aircraft
Bio-Diesel Fueled
Low Wing (Possibly With Winglets)
Conventional Tail
Fixed Tricycle Gear
13 May 2019
AAE 451 Team V

23. Charlie Rush Zheng Wang Brandon Wedde Greg Wilson
This Concludes Our System Definition Review
AAE 451 Team V
Stephen Beirne
Miles Hatem
Chris Kester
Jim Radtke
Charlie Rush
Zheng Wang
Brandon Wedde
Greg Wilson
The Flying V Barn Owl

24. slide left intentionally blank
13 May 2019
AAE 451 Team V

25. 3 View of Diesel Engine
13 May 2019
AAE 451 Team V

26. Diesel Cycle vs. Otto Cycle Engines
13 May 2019
AAE 451 Team V