Dartboardferret - The Ferret & Dartboard

Teaching my compressible flow course online is giving me the opportunity to answer some long-standing questions, such as: Just how fast *is* that eagle in the @USPS logo going? Turns out, about Mach 4.9... pic.twitter.com/bICR7BUItb

— Andrew Higgins (@A_J_Higgins) April 3, 2020

More Posts from Dartboardferret and Others

1 week ago

80080 Hammersmith running round por Nigel Por Flickr: Over the weekend of 3rd, 4th, 5th May the Midland Railway centre at Butterley held their spring 2025 Victorian weekend. Alongside resident Jinty 16440 at the ehad of the vintage set Princess Royal Locomotive trust standard tank 80080 was also running on the line , first time since feb 2019. Along with staff looking resplendent as Victorians some Steam Punks also visited the event . All photos taken 3rd may 2025

1 week ago
2 weeks ago

7029 - Barton-under-Needwood por Andrew Edkins Por Flickr: 7029 “Clun Castle” pictured at Barton-under-Needwood hauling the Shakespeare express.

3 weeks ago
What If A Suburban Tank Engine Was Nuclear Powered?

What if a suburban tank engine was nuclear powered?

The class UT5 is a concept for what that might look like, with a heaping influence of slightly Americanized British motive power. Brownie points to anyone who can guess the three IRL locos I used as reference!

The size reference is Bob Hannigan, who drove 6110 on commuter service around the northern suburbs of Capital on the Imperial homeworld, out of the Wolton Green depot.


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2 weeks ago

I used to be mad about "whole language" reading approaches in theory but now I work with school-age kids and I am mad about it in practice.


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2 weeks ago

Fantasy setting with magic neatly organised into elemental spheres, except each magic-using culture disagrees with all the others about what the primordial elements are, what their associations and correspondences are, and even how many of them there are. Spells always interact with other spells from the same magic system as though its elemental theory is complete, consistent, and correct, but when spells from two different magic systems come into contact it all goes a bit sideways, often in ways that require flowcharts to explain. Like, you think Ground Type vs. Rock Type is bad? There are five separate, mutually exclusive spheres of magic all called "Fire". The Sylvan Confederacy's "Water" magic explodes on contact with the Empire of the Five Pillars' "Water" magic and nobody knows why.

1 week ago
We Love Making Up Fantasy Railways. Wizard Towers Need Rail Access Too. How Else Do They Get All Those

We love making up fantasy railways. Wizard towers need rail access too. How else do they get all those reagents?

I wonder if anyone has ever informed Tumblr about the concept of the "Freelance" in model railroading?

It's basically OCs but for railroads. If you don't have a specific prototype that really does it for you, it's a time honored tradition in the hobby to go off and make up your own, oftentimes with *elaborate* lore. They can run the gamut from extremely serious, plausible, extremely well researched railroads with routes mapped out on Google Earth, to the John Allen school of "that's a fun idea, ship it" (see also: Emma the Organic Switcher)

It's a really fun little corner of the hobby

2 weeks ago
Hop On Buster

Hop on buster

I like Trains


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3 weeks ago
Here To Report American Trains Are More Like The Finns Than The French.

Here to report American trains are more like the Finns than the French.

Language Is Universal

Language is universal

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dartboardferret - The Ferret & Dartboard
The Ferret & Dartboard

Possessed of a normal number of facts about railways. Aviation and robotics are likewiese held in entirely average levels of regard.

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