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Engine Mount
Project Description
In this project we were tasked at designing a frame assembly for a motor mount for a Lycoming 0-300 on an aircraft. The aircraft firewall had to be grounded as the stable part of the frame using fixed constraints. The structure had to be able to support the engine across the three smaller plates. Using 1.5 inch ANSI pipe, mitered as necessary, we designed the frame assembly to where it could be loaded with negative 3 G and positive 6 G. These values simulate the exaggerated engine weight due to sudden acceleration and changes in altitude.
Procedure
In order to prepare for this project, we did a materials investigation in which we studied a number of different materials and their ability to handle stress, tension, torsion, and compression. We also went through a few tutorials in Inventor with which we learned lots of new inventor skills. We learned more about mitering, pinning, trimming, and framing. Using this new knowledge of materials, and experience with inventor we created a frame that met all constraints and got the job done. We picked a strong, well suited, and inexpensive material for the pipes frame. Then we mitered all of the joints to make it more realistic and appealing. Following this we trimmed the excess pipes so that they were even across all faces. Finally came the testing. We pinned the frame member to the firewall and added the different loads to see the stress and deformation. Thanks to the great teaching of Mrs. Gallo, everything went well.
Solution
Above you see the effect of positive 6 G on the engine mount.
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Above you see the effect of negative 3 G on the engine mount.
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After creating the engine mount, we had to test it. In order to do so, we had to simulate the effect of different loads on the frame. Thus we applied negative 3 G and positive 6 G to see what effect it would have on the mount. Our design meets the constraints because it can support the Lycoming 0-300 engine in multiple different cases. We used mild steel as our material. Steel is very strong, heat resistant, has great tensile strength, and has a higher elastic modulus compared to other materials which are great qualities for an engine mount. Therefore, it was just the better candidate for the task at hand.
Conclusion
Thanks to this project, I learned a lot more about Inventor and designing frame assemblies. I also learned a lot about different materials and their properties. Me and my partner Drew worked pretty collectively. We didn't really divide up the work, we just worked everything out together. All in all, I think that the frame generator is a very useful tool for aerospace engineers. With this software they can save themselves lots of time and money due to its testing capabilities.