Project 2.1.4 Frame Design of Engine Mount Introduction Frame construction is used throughout the aerospace industry in the creation of welded steel-tube fuselages, piston-engine motor mounts, ribs, and landing gear. In this activity you will design a frame assembly for a motor mount structure for a to be installed in a light aircraft. Equipment Computer with Autodesk® Inventor® installed and access to the internet. Procedure Your frame must meet the constraints shown below. The large plate represents the aircraft firewall as shown in the image below. This must be grounded as the stable part of the frame. Use fixed constraints on the six firewall to structural member attachment point. The structure will support one Lycoming O-300 engine (250 lb) attached at the three points indicated. The structure will be loaded with negative 3 G and positive 6 G which is simulated by exaggerated engine weight. The structural members will be 1 ½ in. ANSI pipe. Frame members should be mitered as necessary Calculate the forces that must be simulated with the positive and negative G loads. Label the frames below with the forces that will be modeled for each loading condition. Also label the structural members below as compression or tension. Predict where the critical point will be for each loading condition. Negative 3 G Positive 6 G
Project 2.1.4 Frame Design of Engine Mount Introduction Frame construction is used throughout the aerospace industry in the creation of welded steel-tube fuselages, piston-engine motor mounts, ribs, and landing gear. In this activity you will design a frame assembly for a motor mount structure for a to be installed in a light aircraft. Equipment Computer with Autodesk® Inventor® installed and access to the internet. Procedure Your frame must meet the constraints shown below. The large plate represents the aircraft firewall as shown in the image below. This must be grounded as the stable part of the frame. Use fixed constraints on the six firewall to structural member attachment point. The structure will support one Lycoming O-300 engine (250 lb) attached at the three points indicated. The structure will be loaded with negative 3 G and positive 6 G which is simulated by exaggerated engine weight. The structural members will be 1 ½ in. ANSI pipe. Frame members should be mitered as necessary Calculate the forces that must be simulated with the positive and negative G loads. Label the frames below with the forces that will be modeled for each loading condition. Also label the structural members below as compression or tension. Predict where the critical point will be for each loading condition. Negative 3 G Positive 6 G
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