Morning atpollard,
If I install a MD-0 (0 cr, 0 dT), then I need a PP-0 (0 cr, 0 dT) ... problem solved.
I disagree based the first sentence of "The Engineering Section" rule in Book 2 1977 1st edition on page 11.
Each starship is fitted with
a power plant (to provide internal power and power for the maneuver drive), a maneuver drive (for interplanetary travel), and a jump drive (for interstellar jumps).
The way I understand the underlined material a power plant is installed to provides energy for non-jump drive systems that require power to operate systems. Internal systems include the computer, life support, and any electrical or electronic equipment other than the jump drive and/or maneuver drive. The power plant provides the energy that the maneuver drive somehow converts to thrust allowing the ship to move from location to location in normal space.
On page 13 Book 2 1977 1st edition provides the following additional relationship between a power plant and a maneuver drive.
The installed power plant must be of a letter at least equal to the drive letter of the installed maneuver drive (the power plant letter may be higher than the maneuver drive letter)."
Combining the two rules my understanding is that a power plant is needed to provide ship's internal power regardless of having or not having a maneuver installed. If a maneuver drive is installed the power plants rating letter must be equal to or more than that of the maneuver drive rating letter.
Following the checklist on Book 2 1st edition 1977 page 21
1. Select hull size: 100-tons
2. Select drives and power plant
A. Jump Drive provides interstellar movement - 4 parsecs
B. Maneuver Drive provides interplanetary movement- Not installed rating of 0
C. Power Plant provides internal power and power for the maneuver drive. At this point nothing has be installed that needs internal power and the maneuver drive has been omitted resulting in a power plant rating of 0.
3. Bridge. Select (basic) controls, computer, and fire control equipment. I could be wrong but the computer is using the power plant's internal power output to operate.
4. Life Support is contained in staterooms and low passage berths. My guess is that a stateroom has electric lights which requires a source of energy which is drawn from a power plants internal power feed.
Line items 3 and 4 indicate that a power plant is needed with or without a maneuver drive. When a maneuver drive is installed the power plant type letter must be equal or be higher than the maneuver drive's letter.
Exception Processing:
Rules are meant to deal with the majority of normal, reasonable cases.
Normal and Reasonable ships have a Hull, PP, MD and may or may not have a JD.
The RAW work just fine for normal and reasonable ships.
The X-Boat is not a 'normal and reasonable' ship.
Setting aside the question of whether or not there is an error in the design, a ship that Jumps and then floats unable to maneuver is conceptually abnormal and unreasonable (by warship and merchant trader standards).
Per the rules a maneuver drive's primary function gives a ship the ability for interplanetary travel. Unfortunately, CT Book 2 and CT Book 5 don't provide any details on how the ship changes course or maintains its attitude in flight. Reasonably one concludes there is some such system that allows the ship to change course and maintain attitude independent of the main drive.
Is it possible to build a JD with a small power pack that is quick charged during the jump drive initiation sequence (when the JD - a LBB2 1ed PP in its own right) and provides battery support for ship's systems (life support and electronics) for two weeks?
Clearly such a unique set of circumstances do not need a rule published in the core book to allow players to create their own JD-but-no-MD ships.
It is not like there will be a huge demand for multiple classes of such ships.
On more than one occasion I have been informed that unless a design rule explicitly allows for the circumstance then that circumstance is not valid. Now I am being informed that there is are exceptions. No wonder I'm not able to get a handle on the design and construction rules.
I agree that the X-boat can't be built 100% under RAW, but I don't see the lack of PP under the LBB2-1ed rules as a very big issue, just a trivial handwave for a very unique ship.
... why anyone would build a non-MD X-boat in the first place, is a better question, but not relevant to this topic and already debated elsewhere.
Just my 2 cents.
Hand waves, trivial or otherwise, does not help me in verifying a published design. Worse yet when I attempted to use hand waves to explain the design at least one, usually more, let me know I was out to lunch.
I guess I shouldn't even try to support Donald McKinney's efforts to clean-up or fix the published designs. What a bummer
