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  #41  
Old December 2nd, 2017, 05:59 PM
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Quote:
Originally Posted by whulorigan View Post
Correct. This is a change from the original published description of the Annic Nova In Journal #1 / Double Adventure #1.

I do not believe that the "sail" is active/deployed during Jump. It is only to collect the particles to power the Jump Drive in a "burst" prior to insertion into Jumpspace. Accroding to the description, a Collector is one-half external canopy (when deployed), and one-half internal mechanism to store the exotic particles.
Yes, it has to be retracted for Jump, if for no reason than that a 1km diameter flat-circle Jump field with a 300Td hull bulging out of the middle of it seems implausible. But as implemented on AN, the retracted canopy is exposed to space. This means either there's a Jump Bubble kept inflated by some inert gas, or the canopy itself becomes an extension of the Jump Grid. The canopy thus conducts the jump field, but does not generate it. I may not have made that distinction clear though in my post.
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  #42  
Old December 2nd, 2017, 06:53 PM
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Once again the term jump bubble is causing confusion.

The jump bubble is not a bubble of gas, it is a bubble of our universe spacetime maintained by the hull grid generated jump field. Between the hull and the boundary of this field there is a normal spacetime vacuum, beyond the field there is jump space.

Think of it like the lines of magnetic force around a magnet that you can show with iron filings.
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  #43  
Old December 2nd, 2017, 07:18 PM
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Originally Posted by Grav_Moped View Post
True, and if so a properly directed exhaust port ought to let the helium bleed off into Jumpspace without contacting the sail. We already knew that AN didn't use the Jump Bubble concept because it doesn't use hydrogen at all.
I've never known a canonical source for the "Hydrogen/Helium filled bubble"... I know several TNE fans of note adopted it, and the TML was pretty fond of it... but I'd like a canon source for it..
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  #44  
Old December 2nd, 2017, 07:23 PM
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There isn't one I can find - until Mongoose Traveller.

The wording 'jump bubble' was used in the MT SSOM but referred to the normal spacetime bubble I mentioned in my last post - nowhere does it mention using hydrogen from the ship to 'fill up the bubble'. Until MgT that is.

Either this is a deliberate retcon, authorised by MWM (and is broken by their own collector rules in MgT HG2e), or it is a result of the MgT authors not doing their research and going with the fanon error.
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  #45  
Old December 3rd, 2017, 06:21 AM
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Quote:
Originally Posted by mike wightman View Post
There isn't one I can find - until Mongoose Traveller.

The wording 'jump bubble' was used in the MT SSOM but referred to the normal spacetime bubble I mentioned in my last post - nowhere does it mention using hydrogen from the ship to 'fill up the bubble'. Until MgT that is.

Either this is a deliberate retcon, authorised by MWM (and is broken by their own collector rules in MgT HG2e), or it is a result of the MgT authors not doing their research and going with the fanon error.
The latter.
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  #46  
Old December 3rd, 2017, 10:55 AM
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I hate to disagree, but an old post on COTI indicates that FF&S2* states...

"The Fuel remaining in the Jump Drive's surge tank is used to create a thin hydrogen atmosphere around the ship during jump, which helps delay the collapse of the Jump Bubble."

so it can be considered canon as far back as T4.
Apparently the idea follows from book5 rules where jump fuel is needed even if jump capacitors are fully charged.

* I'll check my books in tomorrow to be certain. I don't use that imtu.
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  #47  
Old December 3rd, 2017, 11:15 AM
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That sounds familiar - need to check TNE FF&S and T4 FF&S...

Ok - TNE doesn't mention hydrogen being used to make a jump bubble.

T4 states that the hull grid makes a bubble of normal space and that a small amount of surge tank hydrogen provides a thin atmosphere around the hull - but crucially doesn't say it fills the bubble of normal space.

It looks like the T4 authors were the first to get it wrong...

It is worth pointing out that T5 doesn't mention using hydrogen in this way, which is just as well since collectors and antimatter powered jump drives do not have 'hydrogen in surge tanks' to do this.
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Last edited by mike wightman; December 3rd, 2017 at 11:32 AM..
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