Back to browse
Hold.aero – Fly and Learn IFR flying in the browser

Hold.aero – Fly and Learn IFR flying in the browser

by jcchrrr·Apr 22, 2026·2 points·0 comments

AI Analysis

●●SolidNiche GemCozy

IFR procedure training in a browser when X-Plane costs $300 and requires downloads.

Strengths
  • Real nav data and procedure charts, not simplified approximations
  • Analog cockpit instruments (CDI, glideslope, DME) actually functional in browser
  • Keyboard-only controls make it accessible without joystick hardware
Weaknesses
  • Author admits not a licensed pilot — training validity is unverified
  • Narrow audience: only matters if you're actively studying for instrument rating
Category
Target Audience

Student pilots, aviation enthusiasts, flight training schools

Similar To

X-Plane · Microsoft Flight Simulator · FlightGear

Post Description

I've been building Hold, a web simulator focused on instrument flight procedures — holdings, approaches, radio navigation. The demo at /fly runs a demo PHNL ILS approach: analog cockpit instruments (CDI, glideslope, DME, chronometer), a real procedure chart, altitude, and timings.

I'm not a licensed pilot — I'm a software engineer with an aviation obsession. The idea sits between full-scale sims (X-Plane, MSFS) and static explanations: something amateurs can actually fly in a browser, and that I hope becomes useful for training schools and pilot selection down the line.

Stack is TypeScript (aircraft dynamics, navigation, scoring engine) and React. The charts and nav data are real.

Keyboard to fly — would love feedback on what's confusing, what's broken, and the feeling.

https://app.hold.aero/fly

Similar Projects

AI/MLPass

Paragliding RL

The post ties classic MacCready speed-to-fly theory to an RL framing and carefully walks through sink-vs-speed modeling instead of handwaving the physics. It's a thoughtful niche read, but the landing page is just an article — no simulator, no training curves, no agent demo or downloadable artifacts — so it's hard to judge any technical execution beyond the math.

Niche GemRabbit Hole
kozzion
104mo ago