Viewing profile — jeffrey_t_b

Well, maybe I should have said "made proposals, research projects, and demos". It takes a lot of time and money to bring an actual product to market through flight qualification, a…

Sorry, thought that was in the story: Environmental Control System, which is the aircraft subsystem responsible for pressurizing and cooling/heating the cabin.

I wouldn't say "designed to avoid this problem", because I'm pretty sure that cabin air quality didn't play much of a role in the engineering trades regarding ECS architecture. The…

Having children has always been a choice, e.g. historical birthrates are closely coupled to harvest success. So people are choosing to have fewer children now, and most of that has…

That stuff _is_ ridiculous. I don't know if the human bladder is sized for that level of tea. On the other hand, it looks like an infographic-style addition, added by the newspaper…

While I agree on your main point, I think that you are confusing marginal tax rate with average tax rate. E.g. the 2017 federal income tax for a single making $300k is in the "$46.…

Perhaps it meant to say that one needs a $303k/yr salary to support a $1.2M mortgage (i.e. the loan on a $1.5M house after a 20% downpayment). At an interest rate of 3.5%, that's a…

Well, even if you say that capital expenses are irrelevant considering the very long time frame, you still have to make the argument that operating expenses of the rail are smaller…

> I guess the Airbus/Boeing duopoly is here to stay. Comac is a promising competitor, too, and are explicitly targeting the bread-and-butter size classes of Airbus/Boeing.

It seems like Airbus paid nothing for this (maybe taking on some of the manufacturing expenses?). See: https://www.cnbc.com/2017/10/16/airbus-teams-up-with-bombard... It certainly …

A better, bigger, perspective: http://slatestarcodex.com/2017/05/11/silicon-valley-a-realit...