Clem Tillier

@ctillier.bsky.social

840 Followers 498 Following

eclectic interests - space science & tech, SF Bay Area transit, HSR, anything on rails 🚄 or on a rocket 🚀

Close up photo of my 1/100 scale model of a tower of the Golden Gate Bridge, with a new girder and truss assembly added at road deck level. A bus is also shown for scale.
Making little trusses out of strip styrene on a sticky pattern
Close up of 1/100 Golden Gate Bridge with new girders attached
1/100 scale model of the girders that interface the main span to the tower of the Golden Gate Bridge, freshly painted. There are four bearing surfaces that allow the deck to move longitudinally.
Fit check of some new girders made from styrene strip on my 1/100 scale Golden Gate Bridge tower. Main structure is pine, with various 3D printed fiddly bits.
Model of a tower of the Golden Gate Bridge with new roadway lateral joint truss assembly being checked for fit.
Part of my scale model of the Golden Gate Bridge tower that sits just below the roadway and restrains lateral motion of the bridge deck using pinned joints
Cross section of new Transbay Tube with standard gauge BART train and electric Amtrak
A bicycle being carried in the Caltrain bike car, with another train whizzing by the window
Tunnel cross sections showing BART, regional rail, and both (standard gauge BART line)
Caltrain passenger information screen, with a bathroom direction sticker next to it that should really be information on the screen
A wall at Aldgate Station of the London Underground covered with a busy maze of cables, conduit and junction boxes
Caltrain ridership bar graph showing a strong increase in June 2025
A protest sign that looks like a no parking sign but says no king
Video of the Golden Gate Bridge making dissonant tones, arising from aeroelastic flutter of the new handrails recently added on the windward side.
Photo taken out of airplane window, showing a bit of the old abandoned Bayshore Highway remaining by the runway.
Vegetated hillside under a cloudy sky, with the towers of the Golden Gate Bridge peeking behind
An electric scooter photographed on a station platform with an electric Caltrain pulling into the station in the background, bathed in the orange light of sunrise
A somewhat busy street scene in Chinatown on a sunny fall day in San Francisco
Rendering of a Stadler KISS bilevel EMU, altered with blue BART livery
A cross section diagram of a second Transbay tube, with a single bore, two standard gauge tracks, and a dividing wall and evacuation gallery for fire safety. On the left track is an Amtrak electric regional train hauled by a Siemens ALC-42E. On the right is a Stadler KISS in BART livery.
Photo of a Caltrain diesel locomotive producing a spectacular emission of black exhaust smoke, obviously from some sort of maintenance defect
Photo of a Caltrain gallery car on a funeral train leaving the peninsula corridor. The car has graffiti and open doors.
A Caltrain EMU with a heavily damaged pantograph