Lincoln Airport Tie-Downs

No Thumbnail Available
Schwarz, Martha
Gallagher, Chloe
Breitmeyer, Ronald
Date of Issue
Subject Keywords
Series/Report No.
Lincoln Airport Tie-Downs
Other Titles
Abstract only.
The Montana Department of Transportation (MDT) Aeronautics Division brought an airport campground tie-down project to the Carroll College Engineering class, Senior Design Project. MDT Aeronautics was seeking assistance in the design of permanent tie-downs at the grass campground parking area at Lincoln Airport in Lincoln, MT. Within the project description, the team was tasked with determining the location to place tie-downs and quantity to include in the layout, if earthwork is required, and the type of tie-downs. There were two categories of alternatives evaluated by the team to meet the expectations of the project sponsor. The two categories are the method of laying concrete, pre-cast or on-site pour, and the anchor, mooring eye, D-ring, or cable. When determining the method of laying concrete the team looked at the feasibility and cost of both options and determined an on-site pour would be the suitable option for this project. This decision was made on the basis that the quantity of concrete needed per tie-down and the number of tie-downs was too small to justify the cost of custom precast blocks. A part of making the concrete method decision was deciding what style of anchor would be the most appropriate for the parking area. This was determined by cost, design life, and needed maintenance. After an analysis of the three anchors, it was determined that the mooring eye, although slightly more expensive, has the longest design life and the least amount of required maintenance. The mooring eye and on-site pour concrete are the most effective designs to fit the sponsors' needs. The mooring eye is the place for pilots to fasten straps to anchor the aircraft. There is a metal grove with a bar across, acting as a place to feed the tie-down straps through the groove and tie off to the metal bar. Mooring eyes are the most commonly used tie-down at airports. The mooring eyes will need to be purchased and brought to the site. During the time of construction, the mooring eyes will be embedded into the concrete during the on-site pour. The on-site pour of concrete is the most economically feasible option. The pour has less variability and can be customized to meet the needs of the project. The concrete mix and shape of the embedded block will be designed based on the forces the anchors are required to withstand from uplift on the aircraft. The final layout will include at most 6 parking spots, each with three anchoring points. Aircraft will be required to push the aircraft into or out of their respective parking space. The final design will be completed by May 2024. The final design report will include a site map, material quantities, cost evaluation, and design plans.
Degree Awarded