AE 2350 Design Project

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AE 2350 Design Project

• David Eger
• Peter Pociask

Pi - 42
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Design Requirements

• Crew - 2
• Engines - 2
• Payload - 10,000 Lbs.
• 1500 Mile Radius with 45 min. reserve
• Top speed - Mach 2.0 _at_ 30,000 ft.
• Take off and landing over a 35 foot obstacle -
  6000 Feet

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Design Influences

• Influences in the Design of the Pi -42

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SU -27

• General Planform

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F-15

• Similarity to design requirements

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F-16

• Bubble Cockpit

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YF -23

• Ruddervators

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Mig -29

• Upper Air Intakes

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Design Estimates From Homework 5

• Original Estimates

Engines 2 x EJ200
Gross Weight 40,000 lb Payload 10,000 lb Wing
Area 320 sq. ft. Aspect Ratio 3.2 Top
Speed Mach 2.3 Cruise Speed Mach 1.0
SFC .74-.81 (dry), 1.66-1.73 (wet)
We thought that we would model our plane after
the F-16, which was similar in weight and aspect
ratio to our original estimates.
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A Problem of Range
However, our flying radius was a mere 750 knots.
To increase our radius, we increased our weight
to allow for more fuel. While playing with
weight, however, we found ourselves swapping
formulas in an odd way.
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Landing Distance

• The landing distance was unable to be met without
  adversely effecting every other design parameter.

Attempts up Wing Area, up Aspect Ratio, decrease
Sweep
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Why Not Use a High Aspect Ratio?
From a pure drag standpoint, having a high aspect
ratio is good. The power needed to maintain
cruise is minimal with a high aspect ratio this
is the reason why gliders use such narrow, long
wings.
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Why Not Use a High Aspect Ratio?
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Solution to Landing Problem
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Final Numbers
Top Speed Mach 2.0 Cruise Speed Mach
0.8 Range 3,500 Statute Miles Takeoff
Distance 3700 ft. Landing Distance (extrapolated
from Fig 15.35) 7250 ft.
Gross Weight 45,000 lb Payload 10,000 lb Wing
Area 560 sq. ft. Aspect Ratio 3.5 Wing
Span 44 ft. Plane Length 63 ft.
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Pictures

• Some images of our aircraft.

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Pi-42 TOP VIEW
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Pi-42 SIDE FRONT VIEWS
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Pi-42 3D Model
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Pi-42 over Red Square
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Credits

• Macromedia Extreme 3d and 3D Studio Max
• Caffeine. Lots.
• Janes All the Worlds Aircraft.
• Douglas Adams comforting words

DONT PANIC
Special Thanks to Brian Dolan, Nick Ehret, and as
always, our roommates for not killing us in our
sleep.