07-26-2018, 09:47 AM | #11 | |
Join Date: Aug 2004
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Re: Collapsibles and Drop Tanks
Unfortunately for those who just wish to ignore them the use of drop tanks is one of the earliest bits of setting fluff we ever got for the 3I setting.
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Canonically drop tanks can be used to provide all the fuel needed for a jump and then they are dropped, not carried through jump. In the destination system a new set of tanks will be needed for subsequent jumps. Hence the setting description of them being used on the high capacity trade routes of the interior sectors. Last edited by Mike Wightman; 09-04-2018 at 12:03 PM. |
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07-26-2018, 10:44 AM | #12 | |
Join Date: Aug 2005
Location: Portland, Oregon
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Re: Collapsibles and Drop Tanks
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"The navy could probably win a war without coffee but would prefer not to try"-Samuel Eliot Morrison |
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07-26-2018, 10:49 AM | #13 |
Join Date: Aug 2004
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Re: Collapsibles and Drop Tanks
I build a 1000t jump 6 ship. 60% is fuel.
I use drop tanks for the fuel, I can now transport 600t of cargo instead of empty fuel tank. Downside is I need drop tank manufacture at both systems. |
07-27-2018, 10:31 PM | #14 | ||
Join Date: Feb 2005
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Re: Collapsibles and Drop Tanks
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The Gazelle being discussed effectively has 100dt of fuel its 300dt hull doesn’t have to contain... and when it jumps it does do as a 300dt ship, not a 400dt ship. For commercial ships maybe, military ships have more options. Quote:
A Gazelle can make J2 on internal fuel and J5 with drop tanks if they are dropped pre jump. ...not a J2 then a J3. Last edited by tanksoldier; 07-27-2018 at 10:38 PM. |
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07-28-2018, 07:55 AM | #15 | |
Join Date: Aug 2007
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Re: Collapsibles and Drop Tanks
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Also, even for the military tank retention is probably more common due to budgetary reasons.
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Fred Brackin |
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07-28-2018, 05:26 PM | #16 |
Join Date: Feb 2005
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Re: Collapsibles and Drop Tanks
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07-28-2018, 07:00 PM | #17 | |
Join Date: Jun 2006
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Re: Collapsibles and Drop Tanks
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-- MA Lloyd |
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07-29-2018, 07:22 AM | #18 | |
Join Date: Jul 2007
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Re: Collapsibles and Drop Tanks
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As I recently posted, IMTU most jump fuels is really protection from hyperspace, there are no jump capacitors, and drop tanks are much more expensive, require a ship with an overly large jump drive, and have to be retained throughout jump. But that clearly breaks with canon.
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07-30-2018, 06:12 PM | #19 | |
Join Date: Sep 2007
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Re: Collapsibles and Drop Tanks
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The "overly large jump drive" suggests that you have to equip the ship as if the tankage were part of the hull. So why not just build the ship that way with the regular design sequence, and say there are no such things as "drop tanks"? There has to be some practical difference for the naval architects to have a different bit of jargon. Do you ignore the volume of drop tanks for purposes of ship displacement for performance? "Overly large drives" suggests not, but perhaps you have lesser fuel use, even though the drive is sized for the full displacement including the drop tanks? |
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07-30-2018, 09:37 PM | #20 | |
Join Date: Jul 2007
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Re: Collapsibles and Drop Tanks
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With full tanks attached, as a 400dton ship, I jump 3 parsecs, using 120 dtons of fuel. I detach the empty tanks, leaving me with a 300 dton ship with 160 dtons of fuel. I can now jump 3 more parsecs (90 dtons of fuel), and then 2 more parsecs (60 dtons of fuel). I end up dry 8 parsecs from home. If I built a straight 400 dton J3 ship with 280 dtons of internal tanks, I could only do two 3 parsec jumps (120 dtons each) and a 1 parsec jump (40 dtons), ending up dry 7 parsecs from home. So this ship can go 1 parsec farther without refueling. This might be useful in special situations. (But it has left the tanks behind, which is either a loss or must be recovered somehow.) (I assume jump drives can be run at lower settings with lower fuel use, which may not be clear canonically.) (I haven't actually run the numbers for such a ship design, sorry.)
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