Coy Kwan

Engineer, Tinkerer, Archer, Swordsman

Back in 2016 I wrote a Python program to do my calculus homework and now one CS degree later I still can't do calculus but I get to write more fun code.

When im not fighting the compiler or in CSS hell you can find me wrenching on my car, somewhere on a bicycle, practicing Chinese archery, fencing, or 3d modeling and printing my latest flying (or exploding) contraption. You can check out what else I've been up to below! Alternatively, if you think I can help you build something you can send me a message here!


If you wanna check out cool stuff I build you can check out all my projects below, check back often as I update with new stuff im building!

透甲錐箭 Armour-piercing awl arrowhead

Hand forged arrowhead based on historical designs from the Ming dynasty, designed for penetrating armor. Made from 1045 medium carbon steel and heat treated as was common in historical Ming arrowheads.

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Hypothetical Document Embed Retrieval augmented generation example

A small program I wrote as an example of retrieval augmented generation; a technique to improve LLM queries with access to large libraries of data. The goal of this research is to improve LLM output to reduce hallucination, overly general responses and to require less context in the user query.

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Fixed Wing FPV Drone

Currently developing a fixed wing FPV drone for long range FPV flights, I am using Solidworks to design the airframe and the internal components and 3D printing the parts using a Bambu lab X1C with CFRP filament

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Contra-rotating Gearbox

Prototype of a contra rotating gearbox for another fixed wing drone, designed in Solidworks. The gearbox is reminiscent of a car's differential. The gears parameters are as follows: 20 teeth, ~20mm pitch diameter, 1mm module and 20 degree pressure angle. There are two concentric output shafts.

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Titanium Gravel Bike

I designed and had this bike frame built by a specialty titanium frame builder in China, I designed it using a combination of online frame geometry tools and Autodesk inventor

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86/BRZ Intake duct

Printed my own intake duct for my 86/BRZ using a Bambu lab X1C with PA12-CF

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Archery Thumb Ring

Designed and printed an archery thumb ring based on historical translations from the book 'The Way of Archery' translated by Jie Tian and Justin Ma

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