Follow Slashdot blog updates by subscribing to our blog RSS feed

 



Forgot your password?
typodupeerror
×

Comment Re:Bless you. (Score 1) 126

Deep Space 1 uses NSTAR thrusters with specific impulse of 1,700 to 3,300s and up to 92mN of thrust; they last for just several weeks of operation.

LISA uses FEEP thrusters that produce between 0.001 and 1 mN of thrust at 6,000–10,000s specific impulse, and they are really not intended for travel, but instead for stabilization. (while LISA Pathfinder is merely to test the technology, the planned LISA mission will require three probes positioned in a triangle 5mln km apart with picometre precision.)

Comment Re:Bless you. (Score 1) 126

Fortunately, the Lisa Pathfinder project has already developed ion engines that would be helpful against that. While they generate very minuscule thrust, unsuitable for space travel purposes, they have enormous specific impulse, meaning they can go on for years stabilizing given object against solar wind, gravitational influences and the likes. Several such engines attached to the disk would easily keep it stabilized against solar wind, and another couple on the telescope part would keep it aligned.

Of course you'd need somewhat more powerful jets to turn it around aiming at a different part of the sky, and these would likely need periodic refuelling (note as the disk rotates towards another place in the sky, the telescope part needs to travel a couple thousand kilometers!) but we've got the stabilization covered.

Comment Re:Jackpot! (Score 1) 146

Yes; it was the US screwing up the endgame and treating their allies instrumentally - discarding them once they were no longer needed, leaving them to their own devices in the wrecked country. Still, it's not a huge leap of faith to imagine the indifference, callousness, shortsightedness were all a cover-up for more sinister motives. They say 'don't ascribe to malice what can be explained by stupidity', but it doesn't take a very crackpot mind to do that here. We're talking about the most powerful military in the world - it's difficult to accept such a collosal levels of incompetence instead of believing the apparent incompetence was just to hide the real intentions.

Comment Re:Will this scale? (Score 1) 146

It's unlikely to scale that much anytime soon. Battery size -> radio range; Battery size + motor size -> power -> ability to overcome wind. Mass -> stability -> ability to overcome wind. Add to that lifting power to carry any payload.

Yes, you'll be able to get very small indoor RC quadcopters with several meters of range. But if you want to fly it over GSM while streaming from internal camera, you're not getting it smaller than your palm anytime soon.

Comment Re:Quadcopter (Score 1) 146

Nowadays they detonate these in bomb chambers using an "initiating charge" (a small bomb of their own).
There was that guy who just stood for a couple hours in front of White House, with his briefcase.
They checked the briefcase with xray. They found clothes, essential business travel stuff, nothing suspicious. They detonated it anyway.

Comment Re:It Remains a Journalism Scandal. Deal With It. (Score 1) 693

"from day one, zoe quinn faced the nastiest of sexual and mysoginistic slurs and threats."

Could you substantiate this? I mean, specifically, the number (to prove it wasn't isolated incidents) and connection to GamerGate (as in specific instances was actively disproven).

Comment Re:Slashdot stance on #gamergate (Score 1) 693

I'm not sure you understand how Patreon works. It's not goal-oriented like Kickstarter. It's more of "Let people throw money monthly at a creator, and the creator promises to deliver something nebulous from time to time." While in Kickstarter you're interested to see a specific completed product, in Patreon you 'show support' letting the creator 'keep doing the good job'. As result, popularity - especially victim style or activist style popularity - yields very good results.

Slashdot Top Deals

1 + 1 = 3, for large values of 1.

Working...