Aircraft Design Process

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Presentation transcript:

Aircraft Design Process

Overview Design process Design reasoning Problems solving construction methods and specifications Flight test DESIGN BUILD FLY WWW.KAASHIVINFOTECH.COM

Design Process DESIGN Conceptual Design Preliminary Design Mission Requirements Computational estimation Conceptual Design Computational estimation Preliminary Design Rebuild Detailed design & construction WWW.KAASHIVINFOTECH.COM Flight-testing

Critical Specifications DESIGN Critical Specifications Blended wing/body aircraft 10 cc engine Remote controlled by human pilot Must carry payload of four Dick Smith Gravy packets (1.6kg total weight) Aspect ratio ≥ 2.0 Project cost ≤ $1000 WWW.KAASHIVINFOTECH.COM

Desirable Specifications DESIGN Desirable Specifications Highest possible wing loading Minimum take-off weight Minimum planform area Stable flight in all conditions WWW.KAASHIVINFOTECH.COM

Configuration studied Standard boxwing C-wing Closed box-wing DESIGN Configuration studied Standard boxwing C-wing Closed box-wing WWW.KAASHIVINFOTECH.COM

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Computational Design Solid Works – airframe design, weight and balance Desktop Aerodynamics – aerodynamic prediction Flight Sim – flight simulation and performance estimation WWW.KAASHIVINFOTECH.COM

Box-wing configuration advantages DESIGN Box-wing configuration advantages Minimal planform area End caps improve wing strength Fully effective upper wing surface less run way area WWW.KAASHIVINFOTECH.COM

Tractor configuration Move C.G forward DESIGN V-tail selected Ease of construction Comparatively light Tractor configuration Move C.G forward Propeller intake clear of wing interference WWW.KAASHIVINFOTECH.COM

DESIGN INITIAL DESIGN Upper wing constructed from ply spar and balsa ribs, surfaced with solar film Foam core lower wing surfaced with balsa sheet an solar film V-tail made up from balsa sticks and fibre-glassed to 12mm diameter carbon boom WWW.KAASHIVINFOTECH.COM

DESIGN INITIAL DESIGN Bulkheads fore and aft of payload made from light ply Firewall located and set at specific angle relative to wings Steel wire (3mm) folded and cut for undercarriage WWW.KAASHIVINFOTECH.COM

Detailed design and construction Detailed calculations were completed BUILD Detailed design and construction Detailed calculations were completed Design continually modified as practical problems arose during construction WWW.KAASHIVINFOTECH.COM

BUILD WWW.KAASHIVINFOTECH.COM

Problems Faced and Fixed DESIGN Problems Faced and Fixed PROBLEM Structural joints introduced weak points SOLUTION Structure rebuilt with 6:1 ratio joints WWW.KAASHIVINFOTECH.COM

Tail boom replaced, aluminium plate DESIGN PROBLEM Weak materials SOLUTION Tail boom replaced, aluminium plate undercarriage WWW.KAASHIVINFOTECH.COM

Rebuilt fuselage with more efficient payload DESIGN PROBLEM Too large frontal area SOLUTION Rebuilt fuselage with more efficient payload configuration front WWW.KAASHIVINFOTECH.COM

Chord and span increased DESIGN PROBLEM Wing area too small SOLUTION Chord and span increased WWW.KAASHIVINFOTECH.COM

Fuselage not strong enough DESIGN PROBLEM Fuselage not strong enough SOLUTION Fibre-glassed fuselage surfaces WWW.KAASHIVINFOTECH.COM

BUILD REVISED DESIGN Wings constructed by a hot-wire cut foam core, surrounded with balsa sheeting Spar laminated from 2 pieces of 3mm birch ply wood with carbon fibre between them V-tail of slightly increased area was fibre-glassed to a 7/8” diameter carbon tube WWW.KAASHIVINFOTECH.COM

BUILD REVISED DESIGN Wing/Body fillets sculpted from foam and fibre-glassed for strength and durability 1.5o right side thrust and 1.5o down thrust were built into the engine mount 4mm Aluminium undercarriage bought-off-shelf and re- shaped to suit aircraft WWW.KAASHIVINFOTECH.COM

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Specifications Span: 1.4m Length:1.5 Area: ~ 0.58m2 (900in2) Mass:4 Kg BUILD Specifications Span: 1.4m Length:1.5 Area: ~ 0.58m2 (900in2) Mass:4 Kg Engine: Thunder Tiger 61 Pro (10c.c.) Servos: 5 Channels: 5 WWW.KAASHIVINFOTECH.COM

Test flight FLY Pre-flight Ground Run Engine Adjust mixture First Flight Zero payload flight Adjust trim for straight flight WWW.KAASHIVINFOTECH.COM

Test flight FLY Second Flight Confirm trimming Third Flight Confirm flight characteristics with payload Fuel consumption check Fly actual circuit WWW.KAASHIVINFOTECH.COM

Thankyou WWW.KAASHIVINFOTECH.COM