Titus Ou

Just few weeks ago, we managed to produce our first multi-hexagons assembled surface. 100% ISRU! No additive been used. Just lunar regolith (as LHS-1 simulant) and electricity. I think we found the way to make moon surface more enjoyable for Anakin. Full article: titusou.substack.com/p/solid-surfac…

Good looking, dimension accurate, 3D printed parts always give me smile. PA6-GF30 from @3dxtech printed on @Prusa3D CORE One, ready to be assembled into new testing device for the lunar landing pad~ (Yes I know PA6 is no good for vacuum. It's "testing" device)

It’s a pleasure to pitch at ROCKET PITCH NIGHT TOKYO: Bloom 2026. It helps me connected with new partners, getting critical feedbacks to my moonshot plan. Major decision been made in last few days thanks to the event, to accelerate the progress of Project Paveway. Stay tuned for the news! #VenCafeTokyo #RPNBloom

Next Thursday, Apr23, I will be pitching [Building Landing Pad and Road on the Moon] at [ROCKET PITCH NIGHT TOKYO: Bloom 2026], under category #4 around 19:00 JST. If you are in Tokyo, come! Love to see you in-person. --- 📍 Event Details 【Date】April 23 【Time】2:00 pm - 9:00 pm (Doors open at 1:30 pm) 【Venue】Toranomon Hills Forum, Hall B (4F) 【Access】forum.academyhills.com/toranomon/acce… 【Format】In-person only (no online streaming) 【Co-hosted by】Venture Café Tokyo, CIC, Mori Building Co., Ltd. 📅 Pre-register here👇 community.venturecafetokyo.org/events/713

Taping Kapton tape, with gloves on, can be painful. You almost always need to use tweezer. So we print our owned tape dispenser designed to be used with tweezer... Full artlce: titusou.substack.com/p/make-kapton-…

Router free upgrade on my first generation Starlink. Thank you @Starlink !

IZUMI SPACE is focusing on lunar surface infrastructure, means we are finding way to build “big” things on the moon. Things use meter as size unit. A landing pad for SpaceX Starship derivative HLS (Human Landing System) is going to be at least 30x30m size. Now imaging doing laser with 0.5mm dot size for such big object. We should go bigger dot! Right? It turns out to be a bad idea. Full article on substack: open.substack.com/pub/titusou/p/…

@paulg @michael_nielsen Based on this, radiator as 1/4 size of solar panel... Radiator is probably operating at ~450K temperature range, ~176C or ~350F. Double or triple stages heatpump?

@michael_nielsen An infrared radiator, like the ISS uses, but more efficient. I believe the radiator has to be about a quarter the area of the solar panels.

I met today with the founder of Starcloud and I realized this is going to be one of the biggest engineering projects of our era. When you look at the tradeoffs, it seems inevitable that all the GPUs are going to live in space.

Lunar, a world without cement When I chat with my friends about what IZUMI SPACE is doing (lunar surface infrastructure), the usual first question they ask me is: why not using cement? The most common cement we use on Earth is Portland cement, which is primarily made by limestone, clay, and some other stuff. Limestone (CaCO3), which is main source of CaO needed in Portland cement, is not available on the moon. Full article: open.substack.com/pub/titusou/p/…

Year-end house cleaning always (re)discover somethings… 1983 “Life in Space” 1987 “F-19 Stealth Fighter” 2 most impactful things in my life. They practically defined who I’m. Full article: open.substack.com/pub/titusou/p/…

This was done over a year ago in 2024. 1085nm DPSSL 10mm dot with @SpaceResTech LHS-1 simulant. Learned lots from this.

@Xaraphim Initiative setup = company guidebook History context = adapting, fit-in process Since AI is dealing with non-standard human, it need history context to understand better what this poorly running bio machine want. At least you can hit delete and start over :)

i’ve realized the language models i rely on most are the ones that retain context about what i’m working on without that continuity, it’s increasingly difficult to assess a model’s true capability because it’s operating without critical information about my workflow, preferences, history , etc there’s also no real incentive for AI companies to adopt a shared user profile standard, which means context isn’t portable every model starts from zero. this limits cross-model evaluation and reinforces vendor loyalty thoughts?

@Xaraphim I’m doing something similar but instead of resin model with silcon mold, I use burnaway FDM mold directly.

PSA : if you didn’t know about this process, go and watch this video immediately linked under this post

@DrPhiltill @thesheetztweetz Blue Ghost's 8 landing thrusters seems making less dramatic effect, compare to single big engine at bottom?

@thesheetztweetz This is awesome. I see a lot of the same features seen in Apollo but now with calibrated cameras the analysis will be so much better, greatly reducing uncertainties. The blast at the end is particularly important to understand for when we start landing larger landers.

Paging @DrPhiltill, @DrPhiltill to the moon desk please.

@DJSnM Hi Scott, I made Taiwan mandarin subtitle for you to upload to YouTube. Please DM me.

Here's me doing orbital mechanics to figure out how to stop an asteroid hitting the earth when the obvious solution is to just ask the Eagles defense. youtu.be/kK5IXX4p2d0

@rocket_EE_okada herman miller aeron~ 20+yrs and counting, office and home, highly recommended.

ちょっとお高めのオフィスチェア、欲しくなる。（腰痛持ち）

やっぱりいい椅子だと腰が痛くならない。

@Xaraphim Is that ICF203 flange for the gun assembly? I'd previously test-design a vac chamber using ICF253 pipe, as using mass-manuf parts is cheaper than custom chamber. But it might not be big enough for you.

I've been working for a long time on creating an affordable electron beam gun for a 3D printer for printing metals at a sub 8K price point and have been stuck on making a vacuum chamber that doesn't break the bank. My solution so far is to use a 6061 aluminum outer shell with a thin layer of 304 stainless steel bonded inside using high-vacuum glue, then welding the corners of the chamber. However this still cannot be a final solution since electron beam printing is usually done at 600-1000C and and at that temperature , any adhesives I'm looking at would fail . When it comes to the electron gun , I am starting to see some issues that may necessitate a full redesign. This will be in another post at some point . To the shock of many (lol), I am not a billionaire , so I am going to have to scale it down a bit and run some experiments on the core parts of the build to validate some ideas. Hopefully @amishsolanki and @fabworks_guy are up to the manufacturing 😅

@3dxtech I'd learned from trial and error experience how to use PETG+CF, and internal reinforcement skeleton via purposely designed printing modifier really help to stiffen the part.

@titusou PETG +CF can do more than people think when properly applied, cool print!

XYZ gantry prototype printed with @3dxtech PETG+CF. XYZ carriers in simple plate geometry which was originally designed to be easily fabricated with aluminum, but now I feel I might get away with printed parts.