Engineer Mechanical Design

WILLIAM R. WILSON

- resume –

Objective; Mechanical Design Engineering

Special talents:

Accomplished CadKey operator. I can 3-D wireframe and create large complicated assembly drawings. I can solve mechanism and motion clearance problems. I understand the capabilities and limitations of most modern machining techniques. I redesigned parts to suit new machining techniques and for workstations. I understand the value of choosing compatible materials to avoid galvanic corrosion and material processes to avoid corrosion. I am aware of FAA requirements for fasteners, linkages, and rotating members and reasoning for safe operation.

Experience:11/1995 to 01/2000 Retired (See cover letter for work since retirement)

Pacific Aviation Composites (became Lancair Aircraft.2000, bought by Cessna 2008 and moved to Mexico)

Bend, Oregon 97701

Senior Design Engineer – Mechanical (my purpose was to help start up an aircraft co.)

I hired 3 Aeronautical Engineers, 4 Draftsmen and supervised 4 Project Engineers.

I developed the flap actuating system, aileron differential, rudder/brake controls, engine mounting to composite structure. I developed the door latching mechanism. Reshaped the door to fit the fuselage. I developed specifications for all materials and material processes. Checked all drawings and manuals, developed the drawing change system to suit future replacement part integration and created the master parts list on Excell. All drawings and assemblies are on CadKey. The first production Lancair Columbia 300 was delivered Feb. 2000.

05/1968 to 11/1995

McCauley Accessory Div., Cessna Aircraft, Vandalia, Ohio 45377 (Company moved to GA 2003)

Design Engineer – Mechanical

I designed controllable aircraft propellers for single and twin engine aircraft. Supervised cycle tests, fatigue tests, and load tests. Supervised draftsmen, manufacturing, vendors, and quality control for parts prior to production. I designed tooling for service use and some for shop use.

Accomplishments: I converted all major line drawings and assemblies to CadKey. I developed computer programs and charts to aid design of springs, counterweights, airfoil dimensions, and screw thread designs. I designed the first 3-blade threadless propellers, the first 5-blade turboprop propellers and a larger capacity 4-blade turboprop propeller. I designed a direct reading blade moment arbor determining lead vs. trail edge moments and overall moment to match blades for a propeller assembly; it replaced a time-consuming crude system. I developed a computer program to determine the length of thread engagement required to avoid stripping internal threads and load that external threads fail when using materials of different strengths. I developed a technical report for determining load on the attaching screw(s) of a counterweight in motion at operating speeds and angles. I developed a computer program that combined twisting moments of blade + counterweight + actuating pin to determine the oil pressure equivalent for any operating blade angle. This program each year saved hundreds of hours of design time, testing time, thousands of dollars in prototype parts of not the best design, and saved the company the embarrassment of not creating the best design for the first trial.

I developed dimension locations of pitch control range of all propellers, which was useful in determining power-on or power-off conditions in aircraft accidents. I designed apparatus for courtroom demonstration of centrifugal twisting moments.

My record of safety in aviation has been exceptional.

Education:

Sinclair College – Unigraphics NX4, Solid Works, and Solid Edge v19

Miami University – completed all calculus courses.

Ohio State University – Mechanical Engineering one year.

Activites: Home improvement projects, gardening, alpine skiing and creating engineering design studies.

Address: 2412 N. Aragon Ave.

Kettering, Ohio 45420

Phone: 937-***-**** E-mail: *********@*******.***

Cover letter by William R. Wilson

The job I enjoy most is solving mechanical design problems with proven engineering principles. I reduced weight while maintaining strength, increase strength by reducing stress concentrations, improved production by simplifying parts and assembly procedures. When possible I make right-hand and left-hand parts ambidextrous. When I started to use CAD, I developed and maintained a library of wire-framed parts and fasteners which could be modified for use in an assembly position. These were my modeling tools for converting all major line drawings to CAD.

I do stress analysis with calculations. When I removed a third of a one pound part, my goal was to reduce weight and maintain strength. A simple load test on both parts showed their deflections were alike and the function was improved. When approval was shy for a new application, I studied our fatigue test specimens and noticed a stress concentration in the blade shank fillet area. I redesigned the fillet which increased strength 17% without changing any adjacent parts and was enough for approval. I designed a direct reading blade balance arbor which produced lead vs. trail edge moments and overall moment that continues to aid matching blades for a propeller assembly. This eliminated assembly down-time when a mismatched blade was discovered during balancing.

I designed a controllable propeller for a motored glider used to monitor the US/Mexico border. It was to fly quietly at idle power. My supervisor’s comment to the chief engineer was I had a nearly perfect chance for failure to make this propeller work. My design required a few special parts easy to manufacture and was a success. I designed a larger capacity turbo-prop propeller assembly that is used on an unmanned aircraft for the military. My design study started with a larger bearing ball size, number of balls, and modifications for all mating parts of the assembly including complimentary load capacities for each.

Since retiring, I worked for a small company that designs and manufactures commercial elevator-type ovens. Ovens for GM included a round robin conveyor system for loading and unloading parts with a balanced gate for maintenance access.

At another company, I upgraded a composite winding machine to add more capabilities with a quicker change over time and allowed the possibility of increasing speed.

I had training in Unigraphics NX4, SolidWorks, and Solid Edge. These 3D programs were capable of much more than the student version, and our text was not up to the software’s annual revision. I never had the opportunity the use any of their 3D programs, but I excelled with CadKey 3D wire framing. Lately, I’ve been working with Autocad and Autocad Light.

Recently, I have been working on robot tooling for a patent application that does something that a robot has never accomplished. Times got tough recently and this project is on hold for now. Robot companies did not want to touch such a complicated operation.

I want to learn some of the FEA (finite element analysis) programs, knowing these are an art form of engineering that can lead to erroneous results when stress concentrations can be missed. Multi-physics FEA programs tackle the other what if’s in a products environment and include a library of material specifications with S/N curve data for determining fatigue analysis, information which would be quite valuable.

If your company needs a 3D CadKey wireframe solid modeler, I’m your man. If your company needs a Mechanical Design Engineer, call me at 937-***-**** for an interview. I would prefer working within 30 miles of Dayton, Ohio.

Sincerely,

William R. Wilson

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