iiinova — where your digital self keeps evolving

The OP contemplates 1.5 mile stop spacing.

Would not wipe the floor at all with frequent stops, 79 mph MAS, and long consist. Only EMU wipes that floor.

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Yes I should have qualified my statement with the word “almost.” With frequent stops, low maximum speed and long consists such as Toronto’s, it’s basically a wash.

(ballast weight = prime mover, generator, fuel tank)

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Barely any faster, unless there are few stops and high speeds. Ballast weight is what NJT does with ALP45, brute force.

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Okay I forgot to include the word “almost”

Clem Tillier @ctillier.bsky.social · 17/09/2026

Excellent point. Locomotive-hauled electric is as slow as diesel (higher power is offset by lower tractive effort)

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Oh no they inserted one of the batteries backwards, if my toothbrush is anything to go by

Clem Tillier @ctillier.bsky.social · 16/09/2026

Have you looked at FOS Scale Models?

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Clem Tillier @ctillier.bsky.social · 12/09/2026

Wouldn’t have expected Metrolink had fastest trains in the U.S.?!?

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Clem Tillier @ctillier.bsky.social · 12/09/2026

But staffing up would starve the consultant pork trough, sooo…

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Clem Tillier @ctillier.bsky.social · 12/09/2026

Caltrain is so good at this that VTA wrested control of the Rengstorff project in Mountain View

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Clem Tillier @ctillier.bsky.social · 05/09/2026

I have some (paper) docs. With 5% ruling grade thru Tejon, iirc

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Clem Tillier @ctillier.bsky.social · 04/09/2026

There’s only two ways for this situation to become legal, and I like one of them better

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Clem Tillier @ctillier.bsky.social · 14/08/2026

I dunno just a hunch 2226 will be different

Clem Tillier @ctillier.bsky.social · 14/08/2026

Infrastructure is good for centuries: in 200 years trains may be obsolete but the laws of physics (curvature, speed) will still hold.

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Clem Tillier @ctillier.bsky.social · 13/08/2026

I think it might be a spiral thing, Richard Mlynarik would know more

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Clem Tillier @ctillier.bsky.social · 09/08/2026

Extreme dahlia today

$Close up photo of a red-orange dahlia flower with densely packed fractal petals, taken at the Dahlia Dell garden near San Francisco’s Conservatory of Flowers$

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Clem Tillier @ctillier.bsky.social · 07/08/2026

In thermodynamics this is known as the caltrain cycle

Clem Tillier @ctillier.bsky.social · 01/08/2026

I hope GeoXO won’t mask off the limb like this anymore

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Clem Tillier @ctillier.bsky.social · 31/07/2026

They don’t call ‘em Ram for nothing

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Clem Tillier @ctillier.bsky.social · 31/07/2026

4. Regen on downhills 5. Less wear and tear on prime mover (more consistent thermal environment) since battery absorbs throttle variations

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Clem Tillier @ctillier.bsky.social · 28/07/2026

I experienced this in Neuromancer, where a character carried a corded phone onto a balcony

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Clem Tillier @ctillier.bsky.social · 26/07/2026

Nobody is immune to propaganda, least of all the people who believe they are. Don’t cook your brain on what’s left of Twitter.

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Clem Tillier @ctillier.bsky.social · 25/07/2026

“Reviens en marchant” “Rien en mouvement” 🔥

Infrastructure Weak @infrastructureweak.bsky.social · 22/07/2026

Reposted by Clem Tillier

Now out! Part 2 on the Geary metro, discussing its East Bay connection, downtown alignment, and yard location.

medium.com

Geary metro, purpose-built for SF

Part 2: East Bay connection, downtown alignment, and the yard

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Clem Tillier @ctillier.bsky.social · 23/07/2026

A major cost saving measure is to build cut-and-cover with little or no overburden and especially importantly NO cost-maximizing station mezzanines. Mezzanine bloat is one of the top causes of the astronomical cost of U.S. transit infrastructure.

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Clem Tillier @ctillier.bsky.social · 16/07/2026

Calculating clearance time for given platform dimensions, obstacles, VCE, train, etc. and having it match stopwatch reality

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Clem Tillier @ctillier.bsky.social · 16/07/2026

Neato. Dumb question, did you validate your passenger flow model parameters against existing conditions, prior to calculating with changed conditions?

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Clem Tillier @ctillier.bsky.social · 15/07/2026

If the street lights don’t come on at noon, then you haven’t reached California 2020 levels

Clem Tillier @ctillier.bsky.social · 11/07/2026

Looks fancy, call it a motor court