It's not a question of YTU or MTU & I never, ever said that NO fuel is needed at all.

The question is HOW MUCH fuel does a starship need to have avail AFTER it enters J-space.

The whole idea of d-tanks indicates that it isn't very much at all.

You seem to be saying that IF the capacitors were charged w/o using fuel, then it needs a full load of fuel in order to make a jump.
OTOH, if the ship uses a whole lot of fuel before the jump then it doesn't need as much.

It just doesn't make any sense to require the same amount of fuel in both instances.

Now, to answer your statement "in mine the jump drive needs fuel to make a jump";
You are correct but I note that the AMOUNT of fuel has NOT been specified.
Therefore;
A starship's J-drive needs enough fuel to maintain routine ops while transiting j-space or it cannot jump.
Note that that amount is a very far cry from the amount required to initiate jump under routine circumstances.

Captain; "Are the capacitors charged enough for us to jump?"
XO; "Aye, sir."
Captain, "Do we have enough fuel? We've taken quite a beating."
XO, Aye, sir. Not much fuel is needed once we use the capacitors to enter J-space."

------------------------------------------------------------------------------------------------------------

On Saturday, June 27, 2020, 04:11:44 PM MST, Thomas RUX <xxxxxx@comcast.net> wrote:



On 06/27/2020 3:02 PM Phil Pugliese - philpugliese at yahoo.com <xxxxxx@simplelists.com> wrote:

On Friday, June 26, 2020, 02:16:47 PM MST, Thomas RUX <xxxxxx@comcast.net> wrote:

Hello Phil,
On 06/26/2020 9:05 AM Phil Pugliese - philpugliese at yahoo.com <xxxxxx@simplelists.com> wrote:

On Thursday, June 25, 2020, 07:03:05 PM MST, Thomas RUX <xxxxxx@comcast.net> wrote:

Hello again Phil,
On 06/25/2020 6:33 PM Phil Pugliese - philpugliese at yahoo.com <xxxxxx@simplelists.com> wrote:

On Thursday, June 25, 2020, 01:16:51 PM MST, Thomas RUX <xxxxxx@comcast.net> wrote:

Hello Kelly,

> On 06/24/2020 8:21 PM Kelly St. Clair < xxxxxx@efn.org> wrote:
>

> On 6/24/2020 7:36 PM, Rupert Boleyn wrote:
>
> > Gah. What a mess.
>
> Yyyyup.
>
> My take on that is that someone thought that a ship with a black globe
> being able to soak up hits and then jump out with that stored energy was
> Cool(tm), and then someone(s) else looked at that and realized it opened
> the door for "battle rider"-style starships being charged up by
> tanker-tenders rigged to fast-disconnect their cables while one or both
> move to minimum-safe-distance.

In MT "If a ship absorbs enough energy to make a jump and is supplied with sufficient fuel, it may jump at the end of the turn."

The battle rider would have to have fuel to make the jump.

Using the CT Annic Nova's jump drive you can probably put jump drives on battle riders. One negative is that once in system the battle rider is not capable of charging the jump drive to leave if things go south. Another negative is that the space devoted to the jump drive takes away weapons and armor.

Tom Rux
--------------------------------------------------------------------------------------

But exactly what does 'sufficient fuel' mean?
If it means the normal amount of fuel required to make a jump then nothing is gained from the external 'charging'.
Or does it mean enough fuel to provide a weeks worth of power to the ship while it transits thru j-space?
My interpretation is that when the diverted energy from a black globe has charged the capacitors and there is the correct amount of fuel, (sufficient fuel) for the selected jump the ship can make the jump. The only question I've had is has the navigator/astrogator plotted a jump destination and is the ship outside the 100D limit?

Tom Rux

----------------------------------------------------------------------------

But, but, that really doesn't make any sense as, if the ship had enough fuel to jump already that means that black globe charging of the capacitors is irrelevant, doesn't it?
If the ship already had enough fuel to jump what difference does it make if the capacitors were or were not charged at all? Or even partially charged?
I guess I don't see why all that fuel has to be present if the capacitors are fully charged. 
After all, in the usual routine operation, when the capacitors are fully charged, all the fuel is essentially gone, isn't it?
There has been a number of comments that do not make sense to me in the past, presently here and other sites, and there are going to be more in the future.

The only time a black globe charges the capacitors is when the ship is fending off attacks and during routine operations the black globe is either turned off or in stand-by.

From the rules when a ship's jump using it's maximum rating ends the jump tanks are empty. Some of the fuel is converted to energy to do the initial charging of the capacitors which under computer control forms a field that opens entry into jump space around the ship and apparently closes that entry point in the system departed from. When the ship arrives another point opens and closes in the destination system.

My guess is that the fuel between entry and exit is being used to maintain the capacitors energy level during transit keeping the hull in jump space and, depending on the added details incorporated. is used as a coolant and ejected around the hull.

From the black globe details the capacitors can store a certain amount of energy and if the energy exceeds that value the capacitors blow-up.

There is information that if the capacitors are not properly charged the jump does not happen and there is damage to the jump drive, the ship miss jumps, the ship is destroyed.

If the jump fuel tanks have sufficient fuel to make a normal jump with the capacitors charged then when the capacitors are charged by the black globe under combat conditions the ship can make a jump, which I would not call normal.

Unless of course one uses the precedence set by the Annic Nova which does not use any jump fuel at all.

Tom Rux

----------------------------------------------------------------------------------------

It's not just 'some' of the fuel that is consumed prior to jump initiation.

For d-tanks to work it HAS to be potentially almost ALL the fuel.
Otherwise, once the d-tanks are gone, whatever fuel was still in them is gone too.
Darn it, I saw the text a couple of days ago the stated that the jump fuel tankage was used first and then the internal fuel tankage.

The 300-ton Close Escort has 60 tons of fuel that allows the ship to jump two parsecs using its J-5 Drive. To make a five parsec jump the ship needs 150 tons. Two drop tanks carry 100-tons of fuel. To achieve J5 the 100 tons is drawn from the drop tanks which are jettisoned, hopefully, after they are empty by the computer. Fifty tons of the fuel is used to push the ship into and  maintain it in jump space for 168 plus/minus 16.8 hours at which time, again hopefully, popping out at the plotted destination.
I say that once the capacitors are charged enough then you can jump.
I can accept that in YTU that is how a jump drive works, in mine the jump drive needs fuel to make a jump.
BTW, black globes can be used to charge w/o combat by just coming close enough to a star.
Yes, I found that reference in the at least one of the books, unfortunately I can not remember which one.


Tom Rux

-----
The Traveller Mailing List
Archives at http://archives.simplelists.com/tml
Report problems to xxxxxx@simplelists.com
To unsubscribe from this list please go to
http://www.simplelists.com/confirm.php?u=ckeZ4SpMkTqj0RuowdhoVbpeCyPfxFia