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Vote Your Canon #5: Fusion Rockets / HEPlaR (consensus: Yes)

Are fusion rockets and/or HEPlaR canon?


  • Total voters
    27
  • Poll closed .
Accelerate - coast - decelerate. You can get anywhere in the solar system with a 1g drive, it just takes a bit longer.
Yep, speed comes down to how long you can burn before coasting. A one gee ship with lots of fuel it just as fast as high gee ship with little fuel.

I always have been a fan of time on the float between destinations.
 
You can usually do the 100D thing on departure and arrival, though, and you might have a bit spare for some zipping around dodging pirate missiles.
Interstellar only, 1-2G is perfectly fine (2G is better for VTOL on high gravity worlds for wilderness refueling).
Interplanetary though, 1-2G for 48 hours tops is way too limiting for being able to get to places in a hurry (think Search & Rescue).
 
1-2G for 48 hours tops is way too limiting for being able to get to places in a hurry (think Search & Rescue).
That depends on other assumptions in your game universe. Is space combat with the death of all hands relatively common? Then even 1-2hr will be too late, like that line in Commando. "Did you leave anything for us?" "Only bodies." How common are ship accidents, and what's the standard procedure on (for example) a major venting of the ship? If everyone gets into the coldsleep tubes to keep themselves alive until rescue, then S&R times of months are okay.

That's the more interesting thing to me, less these individual elements in a set of game rules, or a game universe, but how they work together.

As well, the fact that certain assumptions make certain outcomes unlikely or impossible doesn't necessarily mean we shouldn't make those assumptions. Maybe that's just the way the (game) universe is, and people get by somehow. In the real world, space travel being insanely expensive has created business opportunities for billionaires to try to make it merely very expensive. In a game universe, perhaps (for example) S&R being slow creates an opportunity for a band of hearty adventurers with a heavily modified ship...
 
That's the more interesting thing to me, less these individual elements in a set of game rules, or a game universe, but how they work together.

As well, the fact that certain assumptions make certain outcomes unlikely or impossible doesn't necessarily mean we shouldn't make those assumptions.
This. It might not be quite the OTU, but it could be an interesting ATU to play in.

That's also a rules artifact. RAW (in most versions other than CT'77 and TNE) mandate enough power plant fuel to enable brachistochrone transits. Unless you bend the minimum power plant fuel requirement rules, it seldom comes up.
 
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No, the quantity of reaction mass in Traveller ships make fusion rocketry impossible. Or at least impossible for days of multi-G thrust. If you swapped jump fuel requirement for maneuver, it still wouldn't be days of fuel.
 
Are they canon? Yes, for TNE and T4....
No for CT, MT, 2300, T20...
Don't care enough about MGT to worry about it.
 
And also canon in CT77/HG79, T5, and MT since the Hard Times rules include them.
Pretty sure you can have reaction drives in 2300 too for getting to and from planets.
 
When doing canon isn’t T5 the final word?
Not if one is publishing through Mongoose, nor if one is doing non-OTU materials using CE.
Many people restrict what is canonical for their games to one or two editions.

There are 4 layers of canon...
  • Creator's view of what is or isn't canon for the game/setting. In this case, Marc.
  • Editor's view of what is canon - that which the editor in charge will or will not accept. For MgT, that's what Mongoose will accept. For T5, what Marc will accept. For CE, whatever the individual publisher accepts. For anything else, nothing; there's no ongoing editorial acceptance for CT, MT, TNE, T20, T4, GT, GTIW, HT/TfH.
  • What was published for a given edition - a subtly different meaning, as it's reflective not prescriptive. May have been modified by publisher/editor by proclimation to exclude certain works in whole or part.
  • What the GM allows for their game.
Canon literally means "list".
THe oldest use I'm familiar with is the use of the term for the list of promulgations by the Ecumenical counils. One of which also is the "Canon of the Bible" at Nicea, a derivation of the Canon of St Basil of Alexandria, which was the list of books to be used. Basil's canon is longer than nicea's, but the Byzantines and Copts still use the books on Basil's canon; the ones not on both are not used in the Divine Liturgies. One is a list of "Allowed scripture for Christian Teaching" and the other a list of "Allowed for use in the Divine Liturgies" (The communion services, for those unfamiliar.)
It has become a staple of media franchises to describe canonicity of licensed third party items; mostly to let other third parties know what is and is not allowed for them to use.

(The use of the term Canon for a churchman refers to the bishop having listed them as having faculties- rights to perform their duties - in the diocese... and the canon was posted on the wall of the cathedral.)

Marc maintains a canon list of books for every edition separately; every edition disk lists what is core to that edition.
 
1. Reactionary rockets don't really make (ingame) commercial sense any more in Mongoose Second, and military only in the sense that you leverage that extra acceleration into short term manoeuvre advantage.

2. In Mongoose First, they were smaller and cheap enough to have a go at least time to and from the jump limit boundary, in an attempt to minimize operating costs and capital outlay.

3. It's actually worthwhile trying to get a prototype thruster if you're doing extensive manoeuvring once you hit technological level eight.

4. So far, intercontinental and orbital point to point is still worthwhile.
 
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