Eli Doggart

Bubble point test

I used bubble-point testing to characterize porous materials.

Capillary flow porometer

I used a capillary flow porometer to characterize pore sizes in porous materials.

Tensile tester

I used the tensile tester to compare adhesive bonds and welds in shear.

Hirox digital microscope KH-8700

I used the digital microscope for inspection, three-dimensional surface measurements, and porosity work. A screw served as a learning example for building an image from 136 slices.

Stereoscopes

I used Nikon Epiphot and Olympus microscopes to inspect parts and evaluate polished samples.

Permeability stand

I set up and ran nitrogen-flow and pressure measurements to characterize material permeability.

Download permeability data (CSV)

View the original published chart (opens in a new tab)

Flow stand

I used the flow stand to test porous materials.

High-performance liquid chromatography (HPLC)

I used the offset in UV-visible measurements together with flow rate to measure internal volume.

Cut/mount/polish

I prepared brittle porous-metal and ceramic samples by cutting, mounting, and polishing them for inspection.

Solidworks

I modeled fixtures and laboratory tools. The archive shows a grabber, a fixture, and a furnace holder; production CAD is not shown.

Metal 3D printer

I did not operate the metal printer. I studied printed-part density, porosity, and thermal expansion, and helped remove supports, clean parts, and prepare them for the furnace.

Light data analysis

I analyzed test data and made plots comparing ash measurements from two filter setups.

Equipment scheduling

I made a shared scheduling spreadsheet for frequently used bubble-point and flow equipment so people could plan their work around existing reservations.

Epoxy Project

I designed two experiments to test whether heating the existing epoxy could speed curing and reduce its viscosity.

Heating the epoxy to make it cure quicker

I tested warmer curing conditions and compared cure time and yellowing. The archived photographs show the test setup and resulting mounts.

Heating the epoxy to decrease viscosity for pouring

I warmed and mixed epoxy in a water bath before pouring it. It flowed more readily, although the additional steps made this approach less practical for routine use.

Data consolidation

I brought build variables and test results into one spreadsheet so related results could be found and compared more easily.

Fiber study

I tested adhesive bonding as an alternative to welding fibrous metal. After tensile tests under several curing conditions, I constructed a full-scale tube for further evaluation.

Component engineering

I worked with a group specializing in pumps and heat exchangers for the Columbia-class submarine. I reviewed vendor information requests against specifications, originated part numbers, and helped with training activities.

Workplace documentation

The archived description stays high-level because the work was partly confidential. The representative class rendering above is a public U.S. Navy illustration.

CNC Lathe

I operated CNC lathes, loaded and unloaded polymer parts, and inspected dimensions and finish. I used gauges and measuring tools to decide when work offsets needed adjustment.

CNC Mill

I operated CNC mills and checked polymer parts using calipers, micrometers, gauges, and a dial indicator.

Vapor polishing

I worked with vapor polishing. Process details are omitted because they were covered by a nondisclosure agreement. The archived example image came from the company website.

Deburring

I removed burrs from machined parts, including delicate features, and monitored tool wear and part finish.

3D printing

I used SLA printing for optical components and FDM printing for other parts. I also printed a fixture to hold a part at an angle while it was worked with hand tools.

3D Printer Maintenance

I maintained the resin printer, replacing its FEP film, LCD, and screen protector.

CAD

I used SOLIDWORKS and Onshape to prepare printable files, machining quotes, and customer drawings.

Lab Improvements

I arranged a dedicated printing workspace, made a resin-draining stand, assembled desks, and reorganized the office.

Density testing

I worked intermittently at the failure-analysis laboratory, learning density and hardness testing. I built and used a water-displacement density rig.

Sample preparation

I cut, mounted, and polished samples for analysis. The final photograph shows examples of prepared samples at the lab; the original page does not claim that I prepared those particular samples.

Bike builds

I progressed from washing bikes to builds, tune-ups, and repairs. Partly assembled bikes needed assembly and adjustment before they were ready to ride.

Repairs and shop responsibilities

I repaired bikes, including the classic Schwinn shown here, and assisted customers with sales. Later responsibilities included parts orders, website maintenance, and warranty claims.

2018 Season

I led the climbing-mechanism subgroup and served on the student leadership team.

Scissor Climber Prototype

We developed a scissor-climber prototype. It was not used in competition. The photograph shows the robot before its final climber.

Watch scissor climber prototype on YouTube (opens in a new tab)Original video · Eli Doggart

Final Telescoping Climber

The final mechanism used a telescoping design.

2019 Season

I led the hatch-placement subgroup, continued on the leadership team, and joined the drive team as the human player.

Our First Functional Prototype for Hatch Placement

We prototyped the mechanism used to pick up and place hatch panels.

Watch hatch placement prototype on YouTube (opens in a new tab)Original video · Eli Doggart

Final T Shaped Pneumatic Hatch Placement

We developed a pneumatic hatch mechanism, then redesigned it after encountering a competition-rule issue.

Watch T-shaped pneumatic hatch placement on YouTube (opens in a new tab)Original video · Eli Doggart

The Final Hatch Design We Went to World Competitions With

We took the final design to the world competition. I also worked as a robot mechanic, including repairs and troubleshooting at Hartford.

Watch final hatch design on YouTube (opens in a new tab)Original video · Eli Doggart

Fuel cell design and fabrication

Evenly distributed flow in two dimensions across the active area is extremely important for performance. Constrained by manufacturing limitations and legacy tooling, I reduced the maldistribution in reactants from over 40% to less than 2%. Properly loading flow fields in the active area of the hydrogen fuel cell leads to lower electrical resistance, but too much pressure can restrict fluid flow. I used flow and structural simulation to ensure acceptable levels of pressure and electrical resistance despite a reduction in landing area. After designing this fuel cell, I worked with component suppliers across the globe as well as scaled up in house procedures and facilities in order to produce an engine sized prototype.

Flow distribution optimization

Vacuum chuck and dust collection

Active-suspension longboard

Camper Van Build

It is modular and easily adaptable due to use of extruded aluminum profiles.

IQP · Interactive Qualifying Project

The proposal focused on analyzing those approaches for lessons relevant to the United States. The original proposal and report draft are linked below.

Project photographs and a summary of the final findings to come.

Work examples

Selected examples and photographs to come.

Certifications & training

Relevant certificate details and supporting documents to come.

Work examples

Selected examples and photographs to come.

Certifications & training

Relevant certificate details and supporting documents to come.

Work examples

Selected examples and photographs to come.

Certifications & training

Relevant certificate details and supporting documents to come.

Six Sigma Black Belt

TriMech SOLIDWORKS Flow Simulation

August 29, 2024

View certificate (PDF) (opens in a new tab)

Summit Toyota Lift — OSHA PIT Operator Safety Training

May 23, 2024

View certificate (PDF) (opens in a new tab)

Hiking

Biking

Rock climbing

Canoe camping

Backcountry skiing