FUEL CRASH SHUTOFF Team: Abdul Alghamdi, Tyler Bendele, Dawson Hicks, Dean Johnson, and Andrea Tomchak WING MOCKUP
SECTION OF PLANE
1.Kodiak's Current Fittings in the Plane 2.Wing Bracing 3.Our 5/8" Barb to Flange Fitting 4. Kodiak's Mechanical Shutoff 5. Fuel Tank for Aircraft 6. Two Fuel lines in which we will attach our devices to.
Front of Plane
Outer Tip of Wing
Fuselage
Rear of Plane
OBJECTIVE To automatically shut off fuel in an aircraft right when a crash happens to minimize the severity of post-crash fires and help save lives.
VALUE PROPOSITION
DESIGN VALIDATION VALVE
VALVE TO SERVO COUPLER
CAD BOX DESIGN
PROGRAM OUTLINE
Oftentimes otherwise survivable crashes have deadly post-crash fires. Preventing fuel flow can help better control post-crash fires.
DEFINITION OF A CRASH NORMAL ACCELERATION*FACTOR OF SAFETY = MAX ACCELERATION MAX-ACCEL FORWARD = 2*1.5 = 3G MAX-ACCEL SIDEWARD = 2*1.5 = 3G MAX-ACCEL DOWN = 5.4*1.5 = 8.1G
KEY REQUIREMENTS •Box smaller than 6"x6"x6" •Hold 30 psi of pressure •Leak no more than 1 qt/hr per wing •Max of 4 lbs total 1 lb per unit/ wing •Mount in line with existing 5/8" fuel line •Corrosion Resistant, Waterproof, Vibration Resistant •Operate from 24-28 VDC •Self-powered for an hour •Pilot Reset Button •Communicate with other device in wing
ELECTRONIC COMPONENTS
Four Main Tasks: Control Task • Receive Values from other tasks to determine crash • Set the new valve status • Send new conditions to other tasks Acceleration Task • Read/Check Accelerometer Data • Send Status to control task Valve Task • Receive new valve position • Set New valve position Comm Task • Read signal from second device • Send device 2 status to Control Task • Receive Crash Status
Space Constraints: Our Valve, fittings, and box fit within the 4.7" fuel line restriction. The current dimensions of the box are 4 5/8" x 2 3/8" x 1 15/16", validating our space and mounting constraints. Weight Constraints: Estimated total weight of one unit is 0.767 lbs. Power Constraints: Device was calibrated and tested to run with a 24Vdc supply connected. Self-Powered Operation: Validated by leaving Device running for 8 hours with only the rechargeable battery connected. Accelerometer Testing: We have been able to simulate up 4.5G and have the microcontroller still close the valve using the servo. Pressure Constraint: Using pressurized test tank and fluid system to ensure valve has desired outcome at required pressure.
ACKNOWLEDGEMENTS •Sponsor: Kodiak •Client: Jamie Slippy •Lead Instructor: Dr. Swenson •Grad Student Mentor: Zane (Doc) Holliday
2023 Capstone Project