Maybe I missed it, but why does converting waste heat into gravity waves require ejected mass?
But be aware that there is a second parallel discussion going on in the thread concerning the idea of using vented waste helium from the reactor as a medium to use as an expelled coolant to carry away waste heat.
This is entirely unrelated to the gravitic cooling proposal.
Venting helium would leave an exhaust trail or cloud of hot gas, making stealth impossible. Now maybe that is used for normal non-stealth civilian travel, but the gravitic cooling by dumping the heat into other celestial bodies is a way to explain how there can be stealth in space.
It doesn't.Maybe I missed it, but why does converting waste heat into gravity waves require ejected mass?
I think it is likely to be a combination of both of those.I don't think it necessarily does. The handwavium "proposal", to my understanding is either that:
Perhaps Sigtrygg has some additional details that he thinks might be important.
- Waste heat is transferred off the ship via a process similar to the one used in the M-Drive Reaction with the local G-Field: The heat dissipator mutually interacts with the local gravitational field and spreads the heat via the gravitational interaction across other bodies in the system (which increase in temperature an infinitesimal amount relative to mass and distance, while the ship decreases in heat by an equivalent amount).
- Dissipation by conversion to direct gravitational radiation is also another related possibility (though this would theoretically be detectable by Grav-Sensors or GravComm, or possibly Densitometers).
Yes I think this is exactly how I'm going to address this, and how I see it working as well. Thanks for the detailed breakdown.I think it is likely to be a combination of both of those.
The coupling between the gravitics on a ship (grav plates, lifter, acceleration compensation, and the m-drive) will allow waste heat to be dumped into the body the ship's gravitics are coupled with, and this will necessitate gravitational radiation/waves.
And yes these could be detected, but here are the potential gaming benefits:
-stealth coatings and EM masking can now make ships very difficult to detect, the sub hunt becomes possible in setting
-gravitic sensors and neutrino sensors have a hard time picking the ship's signature gravitaional and neutrino emissions from the background
-a whole JTAS or companion article could be written to detail this (or referee's can make it up)
-battle damage, sabotage, or malfunction could affect the heat removal system so the crew must find a way to deal with the problem or be cooked inside their own ship
-or don't include it in your universe
Theoretically, less net. more garbage bag, that allows an extension of the hydrogen bubble beyond the immediate influence of the jump drive.
You quoted my explanation as to how this happens. Granted, it was a brief explanation that you had a quibble with (thus why you quoted it), but I answered this question before you asked it.So you are taking waste plasma at 200,000K say and transferring heat to it? How?
Yeah, pretty much - as far as absolute "indefinitely not detectable to sensors under any circumstances" stealth goes. There are other ways to achieve the same result. We had a section on Stealth in Space that addressed this; it got cut, but I'm told it's under consideration for a JTAS article.You would be venting huge amounts of very hot gas, say goodbye to any pretense at stealth.
Agreed. It is expelling heat. Likewise, spaceships expelling very hot gas/plasma would show up on infrared like beacons.What happens to the back of a refrigerator? It gets very hot.
In terms of scale and application, sure. I meant the basic concept of how the technology works.Not even remotely close to real world application of heat pumps to move heat around ie central heating system heat pumps, air conditioners and refrigerators.
So...I'm not sure how much I'm allowed to quote right now from that under-review-for-JTAS Stealth in Space bit, but I will say that, from the goal you appear to be going for: yes, you would be.As it stands if a ship is venting red hot plasma continuously then you re wasting Cr on stealth coatings and all that guff.
I believe this is part of the point of doing PDF months before print: any significant errata, generated by people reviewing the PDF, can be incorporated before the book goes to print.If the book hasn't gone to print then there is still time to make it "official", as far as I am concerned if I post it on the interwebs it is free to all to use.
That ship would alter its jump field (grid/bubble) to contain the net and its contents.This particular ship could not jump if you need a hydrogen bubble around that which is jumping. T5 goes into detail regarding whether a jump field conforms to the shape of the ship, or is generated as a globe (of sorts) generated by a central Jump drive generator.
Giving people adventure hooks was one of our goals in writing this book.As for myself on why I like this book? Ever wonder what to throw at your player characters for when things go wrong aboard a ship?
Thank you.In all, SOM for Mongoose Traveller is a winner. I don't have the time to read it from cover to cover, and I get caught up in other things, but I get to reading the book when and where I can from time to time.