pedrocr

92 ms·

811.
by pedrocr 8y ago
According to a reddit thread they've saltwater hardened the fairings and now they can reuse them: https://www.reddit.com/r/spacex/comments/bc8105/arabsat6a_el... The first reuse mission seems to be
812.
by pedrocr 8y ago
That part of the comment was about the second sentence, that if we just assume everything is fine there's no point in the discussion. F-117 instability would be a ridiculous level though. That we can safely assume. My conjecture from w
813.
by pedrocr 8y ago
> I'm quite sure Boeing knows the answer to these questions. I suspect the FAA knows the answer to these questions. And when you say "we don't know" I think you mean HNer's engaged in discussion, who maybe aren&
814.
by pedrocr 8y ago
Well, quote the whole thing then: Hopefully yes, but we don't know how much instability there is. If you assume the answer there's no point having the discussion. I was making the point that we don't know what was actually
815.
by pedrocr 8y ago
I agree with everything you mention here. There just seems to be a disconnect here: > Since there is no evidence the problems you are bringing up are actually problems I didn't bring up any problems. I just said that the things yo
816.
by pedrocr 8y ago
>You keep insisting that we don’t know if this airplane is unstable. Because we don't. You've only corrected a strawman, that we know this plane isn't a fully aerodynamic unstable design like an F-16. No one thought that
817.
by pedrocr 8y ago
How does that change anything? If the instability is not aerodynamic and instead is runaway pitch up on power, how is that any different?
818.
by pedrocr 8y ago
That's pithy. MCAS is definitely fixing something.
819.
by pedrocr 8y ago
If you read my post I was only explaining how the OP didn't actually know the things he was claiming. We just don't know how much inherent instability there is in the airframe that then needs to be fixed by fly-by-wire. It's
820.
by pedrocr 8y ago
You're having a completely different discussion unrelated to what I wrote. Fly-by-wire doesn't imply an inherently unstable airframe.
821.
by pedrocr 8y ago
> It'd approach criminal liability if the FAA certified a plane they didn't know the level of instability of. The question isn't if they didn't know, it's if this is an unusual level of instability for an airli
822.
by pedrocr 8y ago
We are analyzing accidents that killed hundreds of people and most people are skeptical of Boeing and the FAA for the engineering and certification decisions they took. Saying "I don't know but surely better informed people were o
823.
by pedrocr 8y ago
> All high performance aircraft are, by definition, unstable. This doesn't follow. Not even fighter jets were inherently unstable before modern control electronics. Using the electronics to make the flight characteristics better is
824.
by pedrocr 8y ago
You are very certain of your conclusion while not knowing the answers to all the fundamental questions to make that conclusion. > I don't see why it matters if they are airliners as long as instability does not translate to a highe
825.
by pedrocr 8y ago
I can see plenty of reasons to change behavior for the test. But that's not the question. The question is why infer you are being tested through the ECU inputs? Setting a flag manually seems like a much better solution for all those ob
826.
by pedrocr 8y ago
> There can be quite reasonable use cases for that information What reasonable use case is there for a detection of the test cycle just from ECU information? If you're just testing stuff surely you have access to the ECU to just s
827.
by pedrocr 8y ago
> This turned out to be because the rounding behavior on the 360 was different and the algorithm is fundamentally unstable using floats. That sounds like a bug though but I guess that's the point. Unless you're bug for bug comp
828.
by pedrocr 8y ago
Do games really rely on the rounding behaviors of floats to not break? Seems like there should always be plenty of margin around that. But maybe something does a loop with these instructions over and over and the error compounds? And wouldn
829.
by pedrocr 8y ago
That's also what I mean of course. All modern AWD systems and even just FWD/RWD cars use the ABS to do traction control with open-diffs. The base AWD system in a Subaru is three open-diffs and then ABS braking is used on any wheel
830.
by pedrocr 8y ago
Thinking about it some more, maybe in a mass produced ICE AWD can indeed be a cheaper add-on. Something like a Subaru that does AWD for all cars. I was thinking more of the direct Tesla competitors that tend to charge quite a bit for AWD as
831.
by pedrocr 8y ago
That's how every other open-diff car already works. Everyone does that. EVs just have the extra advantage that they're much more precise at applying power so the traction control can be much better.
832.
by pedrocr 8y ago
> On an ICE vehicle the only difference between rear and all wheel drive is a differential and a drive shaft. You need three differentials for AWD as you first need to split the power front/back and then right/left in each axle
833.
by pedrocr 8y ago
What is inaccurate? The accident happened in 2000 and the last flights were in 2003 by both airlines. What do you mean by one fleet being grounded quickly? The exact motives for retiring the plane are hard to know. Safety almost surely play
834.
by pedrocr 8y ago
The Concorde was not retired directly after the crash. It flew for three more years and was retired for financial reasons. The crash probably reduced the demand though and thus contributed.
835.
by pedrocr 8y ago
I think you're overthinking this. I'm planning on adding a charging point to my parking space. The building's shared garage already has power everywhere so I just need to install a meter and a standard power socket. The actua
836.
by pedrocr 8y ago
The fact that you will be subsidizing other people's transportation costs in the future is little consolation for the loss. Particularly when you're subsidizing pollution.
837.
by pedrocr 8y ago
Plenty of people have parking spots even if they don't have garages. Adding a charger to those is easy. Street parking does need many more chargers.
838.
by pedrocr 8y ago
That doesn't mean they don't have a parking spot. Most flats include them and states are passing laws that say you can install chargers in your space. Street parking does need more chargers as well and cities are adding them.
839.
by pedrocr 8y ago
This seems pointless but I'll clarify the main thing in case you really haven't understood my point. > You've failed to show that receipt freeness introduces something else that fundamentally "breaks" which wasn
840.
by pedrocr 8y ago
Eliminating exit polls seems like a really bad idea. They're one of the only ways to validate an election system that doesn't depend on the system itself. When you have wild discrepancies, particularly in some precincts, you know

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