bernulli

9 ms·

91.
by bernulli 5y ago
I did miss the part where the original comment was restricted to JT. Thanks!
92.
by bernulli 5y ago
Why wouldn't there be any temperature change in ideal gases? When I compress an ideal gas in a bike pump, it heats up; when I expand it through a nozzle, it cools down. Often I can approximate these processes as isentropic, and then th
93.
by bernulli 5y ago
Also try to read my other comment, the difficulty is precisely my point. I don't see how 'laser in the study is moving with the projectile' is in any way, form, or shape ambiguous. And the $2000 price point is not from the pa
94.
by bernulli 5y ago
Try to read my comment, I never 'assumed otherwise', the difficulty of having the laser as payload is exactly my point.
95.
by bernulli 5y ago
Yes, it's 'moving with the projectile'. How does that make it easier?
96.
by bernulli 5y ago
The laser in the study is moving with the projectile, so I guess even for $2000 you won’t be able to have a 30 km altitude, Mach 6 flying object with perfectly controlled laser launched from a trebuchet.
97.
by bernulli 5y ago
It absolutely is, and will then drive differences in reference area, thus affecting the drag of the object.
98.
by bernulli 5y ago
You’re missing nothing, you’re correct.
99.
by bernulli 5y ago
But very much in inertia, which is acting against the drag, trying to sustain its initial velocity. https://en.wikipedia.org/wiki/Ballistic_coefficient
100.
by bernulli 5y ago
Thanks for contributing to the discussion!
101.
by bernulli 5y ago
I think you have entirely missed the topic of this thread: the comfort of obtaining the book. The list of steps addresses exactly that, whereas reading the book has nothing to do with it.
102.
by bernulli 5y ago
Couldn't agree more. For me certainly not worth the hassle to save $3 on a reduced book that will magically appear on my kindle after I clicked 1-click-buy, compared to pirating it. I remember how upon Radiohead's release of &#x27
103.
by bernulli 5y ago
I'd say prison is pretty low on the 'comfort' scale, certainly lower than '1 click buy'.
104.
by bernulli 5y ago
What's the legal side of this?
105.
by bernulli 5y ago
That one https://en.m.wikipedia.org/wiki/Tatra_77 also doesn’t look like either Tropfenwagen or Schlörwagen. I don’t doubt there are many cases of blatant copying in technology, but I am having trouble to see any conne
106.
by bernulli 5y ago
I don’t understand your comment. Neither the Tropfenwagen nor the Schlörwagen look anything like the Tatra you linked to.
107.
by bernulli 5y ago
I don’t understand your comment. What does Raptor have to do with CFD method developments? What is the frontier? What does it mean to run out of frontiers? Shouldn’t there be more resources rather than fewer?
108.
by bernulli 5y ago
A bit big for a thruster, no? https://en.m.wikipedia.org/wiki/NERVA
109.
by bernulli 5y ago
I don't see that as a reasonable constraint - nuclear propulsion does not need combustion, thermo electric does not need combustion, and there's also things like cold gas thrusters, laser ablation etc. etc. etc.
110.
by bernulli 5y ago
That was 6 years ago, hard to say what remained of that ambitious goal. Also, these guys aren’t with SpaceX anymore.
111.
by bernulli 5y ago
Sure, and an engine that wouldn't need any fuel/power at all would be even better - the question is, what is practically/theoretically achievable. But I guess the fact that everyone is avoiding the elementary question of &#x2
112.
by bernulli 5y ago
In addition to calling my question 'wrong' - can you also answer it? Also, if your 'correct' metric were right, then everyone would walk. Does that solve the problems flying does? I don't think so. [edit]: Also, I g
113.
by bernulli 5y ago
Range is one thing - what is the passenger capacity of these planes?
114.
by bernulli 5y ago
What can I say. Maybe drawing that flow chart really would be helpful for you. It's a valuable skill, being able to follow a thread or a conversation, and trying to understand the back and forth between statements and arguments may com
115.
by bernulli 5y ago
That's true, I hope you're not waiting anymore. If you want to understand this thread, I suggest you start at the start. Hint 1: I gave you the name of the person I answered to. Hint 2: No matter how often you repeat it, it wasn&#
116.
by bernulli 5y ago
One day you'll understand how a thread works! Don't give up hope!
117.
by bernulli 5y ago
I didn’t realize you were daniel-cussen - but it looks like you’re merely overwhelmed by how a forum works. That’s fine, but maybe dial down the smugness.
118.
by bernulli 5y ago
No, but the post I replied to, and apparently you felt the urge to reply to my comment. But I now understand that you did not intend to contribute to the discussion, thanks for the clarification!
119.
by bernulli 5y ago
Sure. And none of this prevents hydrogen from escaping.
120.
by bernulli 5y ago
Have you worked with hydrogen? Being less prone to leaving than He is an extremely low bar and very far away from the claim that it doesn’t ever diffuse through anything.

More ›