Why is there a Jump Fuel requirement?

Discuss the Traveller RPG and its many settings
Reynard
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Re: Why is there a Jump Fuel requirement?

Postby Reynard » Wed May 16, 2018 11:33 am

Back to the original topic.

" I don't know why the jump drive required fuel to do that and not just energy from the power plant, and why does the Maneuver drive require only an energy input, I would thing this arrangement would be the opposite. Why not?"

Depending on the Traveller version, the energy is either generated by the power plant and sent to the jump drive or the jump drive itself has the power conversion capacity. Either way fuel is needed to create energy to create a jump effect.

Again, there are different descriptions as to what the maneuver drive is but all have it as a reactionless event, no mass needed to create movement. Energy is used to create the field or force, whether gravitic and/or interaction with universal quantum forces, to push and pull. There is no hydrogen expelled out the back no matter what the imaginative illustrations show nor is the energy converted to ions or photons for thrust.

Mongoose is interesting that its system requires both power from a source outside the drive AND 'fuel' directly consumed by the drive itself. Just in case I missed it, is there an actual reference that this 'fuel' is used in the bubble? Is this fuel actually used as a really big energy burst needed to create the jump rift and the power plant energy is needed to power the drive's fuel to energy conversion? I think they created the power points game mechanic for 2e but still wanted to retain the classic jump drive fuel requirement. Hey, as long as the ship jumps.
Tom Kalbfus
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Re: Why is there a Jump Fuel requirement?

Postby Tom Kalbfus » Wed May 16, 2018 3:15 pm

Reynard wrote:
Wed May 16, 2018 11:33 am
Back to the original topic.

" I don't know why the jump drive required fuel to do that and not just energy from the power plant, and why does the Maneuver drive require only an energy input, I would thing this arrangement would be the opposite. Why not?"

Depending on the Traveller version, the energy is either generated by the power plant and sent to the jump drive or the jump drive itself has the power conversion capacity. Either way fuel is needed to create energy to create a jump effect.

Again, there are different descriptions as to what the maneuver drive is but all have it as a reactionless event, no mass needed to create movement. Energy is used to create the field or force, whether gravitic and/or interaction with universal quantum forces, to push and pull. There is no hydrogen expelled out the back no matter what the imaginative illustrations show nor is the energy converted to ions or photons for thrust.

Mongoose is interesting that its system requires both power from a source outside the drive AND 'fuel' directly consumed by the drive itself. Just in case I missed it, is there an actual reference that this 'fuel' is used in the bubble? Is this fuel actually used as a really big energy burst needed to create the jump rift and the power plant energy is needed to power the drive's fuel to energy conversion? I think they created the power points game mechanic for 2e but still wanted to retain the classic jump drive fuel requirement. Hey, as long as the ship jumps.
That would be more energy released than from a thermos nuclear explosion, imagine a nuclear bomb exploding that is in the gigaton range! A little bit of hydrogen goes a long way with fusion. Seems to me that by having a reactionless drive, Traveller was eliminating the fuel requirement for the rocket and then replacing that requirement for Jump fuel, seems to me they could have just left it as a conventional fusion rocket and then added on a Jump Drive with a capacitor that needed charging from the main drive. the 2300 game has a different sort of FTL engine that doesn't require a prodigious amount of fuel, unlike the Jump Drive.
Reynard
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Re: Why is there a Jump Fuel requirement?

Postby Reynard » Wed May 16, 2018 8:36 pm

MegaTraveller used capacitors to charge the jump drive. Mongoose used a different physics as many versions have to create a particular game mechanic but most assume tearing a hole in the fabric of reality costs energy and that energy is generated by the futuristic technology of fusion and that needs a lot of fuel. I like the fact they have, over time, included other alternative sources to power the reaction for a jump (as well as alterative means of FTL travel).
Tom Kalbfus
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Re: Why is there a Jump Fuel requirement?

Postby Tom Kalbfus » Thu May 17, 2018 5:32 am

Reynard wrote:
Wed May 16, 2018 8:36 pm
MegaTraveller used capacitors to charge the jump drive. Mongoose used a different physics as many versions have to create a particular game mechanic but most assume tearing a hole in the fabric of reality costs energy and that energy is generated by the futuristic technology of fusion and that needs a lot of fuel. I like the fact they have, over time, included other alternative sources to power the reaction for a jump (as well as alterative means of FTL travel).
How about ANNIC NOVA? That ship used a solar powered Jump Drive, it used no Jump Fuel at all.
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Reynard
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Re: Why is there a Jump Fuel requirement?

Postby Reynard » Thu May 17, 2018 10:40 am

The jump drive is normal. It uses a Collector system to gather and store the exotic particles needed for jump. You can use a fission power plant for power if big enough.
Condottiere
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Re: Why is there a Jump Fuel requirement?

Postby Condottiere » Mon May 21, 2018 7:38 am

It's a magic bubble.

But to be fair, what happened to all that hydrogen when you used a lanthanum grid?
Reynard
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Re: Why is there a Jump Fuel requirement?

Postby Reynard » Mon May 21, 2018 10:18 am

Just becomes part of the energy to power the drive. I don't believe the two systems exist in the same universe for whatever version of Traveller being used. I think T5 gives the option to use either/or but a gaming group will have to explain to themselves why both systems would exist at the same time.
baithammer
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Re: Why is there a Jump Fuel requirement?

Postby baithammer » Tue May 22, 2018 1:37 am

T5 allows for both to exist at the same time.

The bubble is simpler in design and allows for variable displacement hulls, such as external cargo, ect.

The disadvantage is due to the debris near a bubble can push the displacement to overload the bubble and misjump or fail.

The grid systems is more complex but allows for closer operation to the d limit and eliminates the debris issue.

It however doesn't work so well with variable displacement hulls.

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