Mark Lorenz Yamanaka Get in touch
01 — AERONAUTICAL ENGINEERING PORTFOLIO

Every project here is one I'd still revise.

I'm Mark Lorenz Yamanaka, a PRC-licensed Professional Aeronautical Engineer working across CFD, FEA and GD&T drawing sets. Seven projects below: six taken far enough that someone could build them, and one still under analysis. Two are published as failures, because the numbers came back short. The full working is in the repositories.

See the seven projects ↓
PRC Professional AE · 2024 ASME Y14.5-2018 FAR Part 23 / 27 / 29
Open to aerospace / mechanical roles
Six of them, in the round Hover to identifyDrag to identify
Interactive view unavailable — the six projects
CD Nozzle Propellant Tank MK-10 PANO-VISTA Rotor Wing rig
Hangar time

Internships

Dornier Technology Inc.
Aircraft maintenance engineer intern · May–Jul 2023

Fifteen-plus pre- and post-flight inspections across A320, ATR-72 and B737 during line maintenance, then an A320 engine overhaul in base maintenance, including a torque-controlled fastener installation on a wing leading-edge de-icing boot under a licensed mechanic's sign-off. The last rotation was technical records: reviewing NRC, service-bulletin and airworthiness-directive compliance.

Also where I learned to safety-wire properly. It is a small, unglamorous detail, but it tells you whether a job was done by someone paying attention.

Alpha Aviation Group Philippines
Ground Support Group intern · Feb 2023

Flight simulation sessions on a Cessna 172 and an A320, trainer aircraft external inspection and cockpit prep, and one supervised engine run-up and taxi on the Cessna, working through the function checks and fault indications that go with it.

A fault indication reads differently once you have sat in the seat that shows it to you.

Seated in an A320 full-flight simulator flight deck
A320 full-flight simulator
Seated at the controls of a light single-engine aircraft
Light single flight deck
mark@portfolio—~/about

The best I could do that week. Not yet the best I'll do.

Mark Lorenz Yamanaka
01 — Self-assessment
// strengths
Will re-run a mesh four times to earn one number. Asks why the spec says what it says. First fix is the weird one. Still the working one. Writes down every mistake before it repeats.
// weaknesses
Same habit, wrong week: will re-run a mesh four times to earn one number. Three backups of the backup. Learned that one the hard way. Will watch the same result five times before trusting the trend. Explains the failed gate first, at parties.
02 — Tools
03 — Background

I studied aeronautical engineering at Holy Angel University from 2020 to 2024, graduating on the Dean's List with a GPA of 1.58, where 1.00 is the highest mark, or about 3.6 out of 4.0. My coursework spanned aircraft structures, aircraft/helicopter/UAV design and systems, aerodynamics, powerplant, and reliability engineering, and I was licensed as a PRC Professional Aeronautical Engineer that same year. Somewhere between a hangar internship and a mesh study I worked out what I actually enjoy: taking an analysis far enough that it turns into a toleranced drawing someone can quote, machine and inspect.

The hangar came first, though. It is hard to over-report a factor of safety once you have seen what an aircraft actually looks like at 40,000 cycles.

I am based in Tsukuba, Japan. I'm happy to walk through any of these end to end, including the two that failed.

04 — Beyond the desk Hover to nudgeDrag to nudge