* Posts by Dorobuta

18 publicly visible posts • joined 19 Jul 2011

Help the Macless: Apple’s iPadOS is a huge update that will enable more people to do without a Mac... or a PC


Re: We've seen it all before

I would think that using the iPad as a secondary display opens up the use of a stylus (apple pencil) as a pointing device for the Mac. This may not be initially available, but I could see this as a natural growth of this capability. I also see it as something useful.

But that's me, as always, your mileage may vary.

US Navy blasts drones with ship-mounted LASER CANNON


cost of projectiles

high rate of fire

when I can shoot hundreds of rail gun projectiles for less than the cost of a single missile.

guided munitions from rail guns are within the realm of possibility. but a frangible projectile that became hundreds of hypersonic pellets after being fired would do massive damage on an air craft - sort of a super phallanx. or CiWS


Re: Missing the point: SOLID STATE!

The location of the artillery is known the instant the first round leaves the barrel. Answering fire is on its way before the first round strikes.

This is not even considering air strikes and/or cruise missiles.


Re: Demonstrators.

but then again, ships operate in a giant heat-sink known as the ocean...so cooling is not as big a problem as you might think once it goes beyond a technology demonstrator...

Study: The more science you know, the less worried you are about climate


Re: Makes sense

"the US government should seek to fund a communication strategy on climate change which is not focused on sound scientific information."

Politicians on both sides of the Atlantic make all their decisions on the assumption that THEY're NOT stupid anyway.

Fixed it for you..

Amazon boss finds Apollo 11 engines on seabed

Thumb Up

They were impressive to see, hear, and feel in action too

Though young at the time, I was fortunate enough to be at the Apollo 8 launch. This is something that will will stay with me my entire life. I've also been at a shuttle launch - while impressive, still not the same as a Saturn V liftoff.

GPS glitch leads perp-pursuing cops to wrong house



They failed to shoot his dog. Shooting the dog is customary when you raid the wrong house.

US Navy preps railgun for tests


Sectional density and Ballistic coefficients come in to play. The sectional density of the projectile will be extremely high. There probably isn't enough density in the missile to vaporize the projectile. A missile has a very low sectional density and is not designed to hit the target head on. That is very difficult to do.

The missile works by getting close enough to detonate and send a clod of shrapnel into the target. When dealing with other missiles or aircraft, this is more then enough to cause them to stop working. With a projectile like this, the best you'll do is alter its course.


wrong Unit of measure

Nautical Mile.

Steerable bullet aims for mass army deployment


Just like laser designators for other guided munitions, the beam is invisible to the naked eye. You'd have to know you're being lased, know the color of the laser, and know where the shot was coming from.

The seeker on the bullet is going to have a limited field of vision.The bullet would not be able to see a target 180 from the point of aim. The amount of correction available is dependent on the speed of the projectile and the distance to the target. Gross corrections will drastically slow the bullet down, as it is not traveling under power. I suspect that there is a narrow field of vision, 24 - 30 degrees at most, that it has.

It will have nowhere the same kinetic energy that a conventional .50 caliber has using a 600 - 750 gr bullet at around 3,000 fps vs this much lighter, slower round.

Good anti-personnel round. Probably very useful against someone who is going to shoot at you with an RPG.

Results in on why life, the universe and everything exists


of course, we could be in the middle of a huge annihilation event, that to an observer outside of out universe would maybe be a few nano-seconds in duration. While to us, inside the event, it is taking so long we aren't aware of it. (Along the lines of what happens when you cross the event horizon of a black hole.)

the theorists could be correct and not have any means to see the proof.


US doctors demand right to advise on gun ownership


You should be banned for injecting logic and reason into this discussion.

Russian probe engines crap out on way to Mars


Studying rocket engines - hmm, thermodynamics and Mechanical Engineering - maybe some fluid dynamics as well. Still engineering disciplines...

'Puzzling structures on surface' of YU55 spaceball


They're using 8 bit technology, renewing my faith that unix can be used to overcome any alien technology - after all, AT&T derived it from code recovered from the crash at Roswell.

Japan develops powered armour suit for nuke workers


Either Cybermen or Daleks, in any event, this will prove to be the downfall of mankind. Unless the Dr shows up.....

Colossal dead black neo-sphere approaching Earth



Truck nuts swing onto US freedom of speech agenda

Thumb Down

destruction of property is not free speech

The box cutter idea is a bad one, and if caught can put you on the wrong side of the law.

iPhone plunges 13,500 ft from skydiver's pocket - and lives


Can you cite the relevant FARs?

Can you cite the relevant FARs on anything other than sand or water?

Having been involved in a number of rescue drops of food, clothing, radios, first aid gear, as well as a few flour bombing competitions, I'd like to hear about this absolute set of rules.