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[SG] Nuclear-powered aircraft so large other aircraft can land on them in our future? - Page 19

post #181 of 250
Being an Aviation major, it really pains me to see the closet physicists in this thread that have no idea what they are talking about.

Besides the obvious construction and power issues, the things I see needing to be overcome:

1. Wake turbulence: Major issue, they need to most likely direct a portion of the thrust downward to make it even possible to land on without flipping. Airfoil turbulence should not be too much of an issue, since it should be straight and level while landing on it.

2. Take off: If you try and take off the opposite direction on this thing, you immediately stall unless you can get a ground speed greater than the airspeed of the craft, even then you would need to greatly exceed that. One solution would be to attach a tow rope and drag the plane behind the craft for a short while, then release. Seems like the most practical method. Again the issue of wake turbulence applies.

3. Altitude: If anything above 12k feet, all of the aircraft would need to be parked in a pressurized hanger before anyone could get out due to lack of oxygen. No commercial craft is built to maintain pressurization while attached to any sort of docking station. This can obviously be fixed fairly easily by modifying current aircraft, but still an issue no less. Also its 2 degrees Celsius colder per 1000 ft you go up (standard), so obvious air temperature issues arise if you are aiming for much higher altitudes.

Couple other things to address:

Your landing gear would NOT rip off landing on this. Lets say the craft is moving at 200kt, and you are moving at 230kt coming in for a landing. You are landing at 30kt. Simple as that. Everything is relative here guys.

That windscreen shielding the aircraft landing is more than enough to completely negate relative wind on the runway. Looking at that design, once you've passed the first quarter of the runway, the relative wind will be completely gone since it is being directed OVER the runway. Look up how air flows over an airfoil and it becomes clear very quickly. Crosswinds, wind shear, and micro-bursts will be as they are landing at any other runway.

Lots of other things to address but I won't get into it. Physically possible. In a perfect world, practical. In our world, a huge target. I don't see it ever making production, as much as I would LOVE to land on one.

And guys, its 2011. Get off that nuclear fear that people have been riding for so many years. An extremely viable technology is hampered by people like you.
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post #182 of 250
So all it takes to drag a post out of you is an aircraft large enough to land other aircraft on.
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post #183 of 250
Quote:
Originally Posted by CyberDruid View Post
So all it takes to drag a post out of you is an aircraft large enough to land other aircraft on.
Haha yep it hit a nerve for me reading these posts. My sig says it all man, I love me some forum lurking
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post #184 of 250
cold fusion...hmm dare i say Ion powered engines? built in space, built for constant flight. some ion motors just enough it keep it airborne in strong front wind. naturally a couple of extra ones just in case one or two failed.

If we have the technology to build it, we ought to have those pretty well mastered.

Since we are talking about future endeavors.

but, talking about huge terrorist target. it will have to have point defense lasers.


And, naturally I though of laputa castle in the sky when i saw this.
post #185 of 250
Quote:
Originally Posted by Crackheadkid View Post
cold fusion...hmm dare i say Ion powered engines? built in space, built for constant flight. some ion motors just enough it keep it airborne in strong front wind. naturally a couple of extra ones just in case one or two failed.

If we have the technology to build it, we ought to have those pretty well mastered.

Since we are talking about future endeavors.

but, talking about huge terrorist target. it will have to have point defense lasers.


And, naturally I though of laputa castle in the sky when i saw this.
Unfortunately, Ion propulsion systems would never produce enough power to maintain flight. The thrust from Ion engines are intended for spaceflight in a near frictionless environment. Overcoming wind resistance, atmospheric resistance etc would be impossible for those, at least in it's current application.

I do like the idea of the electrically powered low-bypass turbojet. Seems like it would be viable. A lot more work needs to be done on that subject though, since the only real application of electrically powered aircraft are all prop engines.
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post #186 of 250
Quote:
Originally Posted by slipstream808 View Post
While a TON of questions and concerns come to my mind...

I can't stop thinking about this thing taking off or landing. And how big would it'd runway have to be??
the new spaceport big enough?
post #187 of 250
would be impossible to get something like that off the ground. You see how much fuel it takes just to get a rocket into orbit? yea thats a relatively short(but intense) journey compared to sustained flight.Switching it all out for Nuclear powered isnt gonna fix it overnight. Also the larger the control surfaces the more that can go wrong, and my god you dont want to be under that thing when it all goes wrong.
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post #188 of 250
Quote:
Originally Posted by SpartanVXL View Post
pulling up physics from my dulled mem, but woulden't the mass of this thing be problematic? from an engineering point of view they'd need to make sure this thing is structurally sound or the momentum of different parts of the craft would tear it apart from it just trying to make a left turn (propulsion turning? or banking, would be o.O to see that massive thing bank)
Since theres someone who knows his stuff here could they answer this? would be interesting
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post #189 of 250
Quote:
Originally Posted by Oupavoc View Post
lol i never taught about that...the sheer size of it, it will take out many city blocks!!!
probobly half a state

yyyyAwr a Popup from ocn interrupted my life just now and i Rawr3d at it
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post #190 of 250
Quote:
Originally Posted by SpartanVXL View Post
Since theres someone who knows his stuff here could they answer this? would be interesting
Very simply put, yes if you tried to bank this craft too much it would tear apart in an instant. It's called the maneuvering speed, each aircraft has a different number based on its construction and weight.

Seeing as this thing would weigh quite a bit, its maneuvering speed would be extremely low, meaning any sort of banking would have to be very slight and over a long distance to achieve.

Hope that answers your question
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