Project number
26026
Organization
Honeywell Aerospace
Offering
ENGR498-F2025-S2026
Honeywell is interested in designing a Honeywell Turbo Fan engine to support the next generation of airframes in the aerospace business jet markets. The engine will be attached to the airframe with a forward and an aft mount system.
The forward mount system is comprised of a structural yoke attached to the airframe and to the engine. This project uses a soft mount system, which allows a small amount of relative motion between the engine and the airframe. This reduces cabin vibration which results in less noise and fatigue for the passengers.
Upper and lower arrangements are first attached to the engine front frame, allowing the coupling of the yoke to the engine. These arrangements use a cylinder housing with an internal piston. The piston is arranged to have resistive spring force in both the up and down directions. A fluid is then pumped from above the piston to below the piston and vice versa, providing dampening. This fluid flow rate can be modified throughout the flight envelope to allow active dampening of this mount system.
This project will have a focus on the proof of concept. 3D printing and plastics are encouraged.
Design and build a proof of concept prototype of a soft mount, piston driven, variable fluid flow control system that is optimized to be lightweight while meeting the following objectives.
• A piston cylinder housing and cylinder cover that have a total height of 2.625”
• A piston with an outside diameter of 4.800”, a portion of the piston protrudes through the cylinder cover. A piston travel distance of +/- .175”
• A force of 5 lbs. +/- 2 lbs. to fully bottom the piston (piston travel = .175”), in either direction, with the manually controlled valve fully open (valve_open_force)
• A resistance force capable of 10X valve_open_force with the manually controlled valve fully closed and where the piston has not bottomed out (piston travel < .175”)
• Various seals preventing fluid depressurization above and below the piston.
• A bypass circuit allowing fluid to move from the top of the piston to the bottom of the piston and vice versa.
• A manually controlled valve allowing adjustments from fully open to fully closed of the fluid flow rate in the bypass circuit.
• At least one stiff and one soft coaxial Belleville (conical) washer resisting motion in both the piston up and piston down directions. The stiff spring rate approximately 2X the soft spring rate.
The forward mount system is comprised of a structural yoke attached to the airframe and to the engine. This project uses a soft mount system, which allows a small amount of relative motion between the engine and the airframe. This reduces cabin vibration which results in less noise and fatigue for the passengers.
Upper and lower arrangements are first attached to the engine front frame, allowing the coupling of the yoke to the engine. These arrangements use a cylinder housing with an internal piston. The piston is arranged to have resistive spring force in both the up and down directions. A fluid is then pumped from above the piston to below the piston and vice versa, providing dampening. This fluid flow rate can be modified throughout the flight envelope to allow active dampening of this mount system.
This project will have a focus on the proof of concept. 3D printing and plastics are encouraged.
Design and build a proof of concept prototype of a soft mount, piston driven, variable fluid flow control system that is optimized to be lightweight while meeting the following objectives.
• A piston cylinder housing and cylinder cover that have a total height of 2.625”
• A piston with an outside diameter of 4.800”, a portion of the piston protrudes through the cylinder cover. A piston travel distance of +/- .175”
• A force of 5 lbs. +/- 2 lbs. to fully bottom the piston (piston travel = .175”), in either direction, with the manually controlled valve fully open (valve_open_force)
• A resistance force capable of 10X valve_open_force with the manually controlled valve fully closed and where the piston has not bottomed out (piston travel < .175”)
• Various seals preventing fluid depressurization above and below the piston.
• A bypass circuit allowing fluid to move from the top of the piston to the bottom of the piston and vice versa.
• A manually controlled valve allowing adjustments from fully open to fully closed of the fluid flow rate in the bypass circuit.
• At least one stiff and one soft coaxial Belleville (conical) washer resisting motion in both the piston up and piston down directions. The stiff spring rate approximately 2X the soft spring rate.