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General Electric HTRE-3 Nuclear Jet Engine

planehistoria.com

41–50 of 71 posts

Re: General Electric HTRE-3 Nuclear Jet Engine

#41
post #3

I wonder if a RTG could produce enough to run an electric quad or optocopter? For certain applications if unmanned you wouldn’t really need to worry about shielding. I wonder how long those motors can run continuously?

Nuclear Stirling engines can run for a decade or more, but are still too heavy for a helicopter.

Re: General Electric HTRE-3 Nuclear Jet Engine

#42

I see your GE HTRE-3 and raise you a https://en.wikipedia.org/wiki/Ford_Nucleon

This was never serious. Technical writing e.g. in textbooks in the 1950s explain that a nuclear-power car is 'not within the bounds of reality'. https://babel.hathitrust.org/cgi/pt?id=mdp.39015003994194&vi...

Today, we have nuclear powered cars on Mars.

And with their amazingly powerful (checks notes) 0.13hp engine, you'll have plenty of time to admire the view.

Re: General Electric HTRE-3 Nuclear Jet Engine

#43
post #19

Earlier quoted context omitted.

I wish Toshiba would have actually sold that RTG laptop battery. Imagine never having to charge!

On the other hand, imagine carrying in your bag a heater you can never turn off.

Depends on where you live I guess! Maybe you could plug it in the feed the grid.

Re: General Electric HTRE-3 Nuclear Jet Engine

#44

I see your GE HTRE-3 and raise you a https://en.wikipedia.org/wiki/Ford_Nucleon

This was never serious. Technical writing e.g. in textbooks in the 1950s explain that a nuclear-power car is 'not within the bounds of reality'. https://babel.hathitrust.org/cgi/pt?id=mdp.39015003994194&vi...

Hmm, I don't know, it's a concept car, not a sci-fi car. Show me a big shot realist and I'll show you an even bigger dreamer.

Re: General Electric HTRE-3 Nuclear Jet Engine

#45
post #42

Earlier quoted context omitted.

This was never serious. Technical writing e.g. in textbooks in the 1950s explain that a nuclear-power car is 'not within the bounds of reality'. https://babel.hathitrust.org/cgi/pt?id=mdp.39015003994194&vi...

Today, we have nuclear powered cars on Mars. And with their amazingly powerful (checks notes) 0.13hp engine, you'll have plenty of time to admire the view.

Hey, don't knock it, the West was won on 1hp.

Re: General Electric HTRE-3 Nuclear Jet Engine

#46
post #42

Earlier quoted context omitted.

This was never serious. Technical writing e.g. in textbooks in the 1950s explain that a nuclear-power car is 'not within the bounds of reality'. https://babel.hathitrust.org/cgi/pt?id=mdp.39015003994194&vi...

Today, we have nuclear powered cars on Mars. And with their amazingly powerful (checks notes) 0.13hp engine, you'll have plenty of time to admire the view.

Today?, Curiosity landed 2012 in the Gale Crater on Mars: https://en.wikipedia.org/wiki/Multi-mission_radioisotope_the...

Re: General Electric HTRE-3 Nuclear Jet Engine

#47

Earlier quoted context omitted.

No. You're thinking of nuclear waste. Voyager's RTG lasted "only" a few decades.

Design choice, not an inherent constraint. Plutonium has a half life in excess of 25000 years

Long half life also means low energy output.

Re: General Electric HTRE-3 Nuclear Jet Engine

#48

Earlier quoted context omitted.

The correction for cruising height would be insignificant. A ram-jet is an air-breathing engine and would be confined to the atmosphere. Even a 60km cruising height (which is much higher than what would be used) would only correspond to a 1% increase in flight path circumference compared to the surface value of 40.000km.

I think the GP might have meant that Mach 3 at ground level is even more technically astonishing - a lot of the historial benchmarks for airspeed (mach 2 fighters and interceptors, the SR71's mach 3) were only valid at very high altitudes were the atmosphere is sufficiently thin to make the achivement teneable from a drag and heat-flux perspective. To cruise along at Mach 3 at sea level is a quite astonishing display…

I'm skeptical of such a capability. Even granting the engines the power and durability to do that, what about the rest of the airframe and avionics? How do they prevent those from being baked if not outright melted? The SR-71 required a substantial engineering effort to withstand the shock heating at that speed but the SR-71 flew very high in thinned air.

Re: General Electric HTRE-3 Nuclear Jet Engine

#49

They have also tried to use nuclear power for space propulsion. Here is a fun one: https://en.wikipedia.org/wiki/Project_Orion_(nuclear_propuls...

This is not just a curiosity though. Nuclear pulse propulsion like Orion is actually the most advanced form of space propulsion that is within technical reach and doesn't use science fiction ingredients like large amounts of antimatter. When you read the article, you see that Orion was considered quite doable even decades ago. There actually is one system that would be even more efficient than Orion, the Medusa:

https://en.wikipedia.org/wiki/Nuclear_pulse_propulsion#Medus...

Though the Medusa design is less fleshed out than Orion.

Re: General Electric HTRE-3 Nuclear Jet Engine

#50

I guess the author gets paid by word count. The piece could have been written in one third of the length.

The piece was definitely written by an AI. And a bad one at that. It is a redundancy nightmare. To save your time: "In 1951, the United States military initiated a program aimed at developing a nuclear-powered aircraft capable of unlimited range (ANP program). The program’s goal was to create a nuclear reactor small enough to fit into an aircraft yet powerful enough to provide the necessary thrust while ensuring the…

We've come a long way in material construction in the last 50 years, I wonder if this could now be built.
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