Warp Reactor Concept
In the nacelles, I have a series of cylindrical reactors. You can see one of those pretty clearly, below.
Now, an in-universe explanation of what's going on here:
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The matter (in the form of simple hydrogen), superheated by a fusion device, slightly cooled as it leaves the "control reactor," and then flowed into a distribution manifold along the central axis, is injected into each of these reactor chambers, in a closely-controlled sequence. Note that each chamber is slightly smaller than the one forward of it... this is by design.
The antimatter is contained in a facility at the aftmost end of the nacelle (roughly "box" shaped, extending beyond either side of the nacelle body). From here, the antimatter is injected into one of four shielded antimatter transfer tubes, which are found in the four aft nacelle main structural channels. The antimatter is delivered to the reactor chambers via these manifolds.
There are four rows of reactor chambers, spaced 45 degrees apart. All four dump half of their output into the central "reactor core feed line" where some is channeled towards the secondary hull main energizer to produce usable power for the ship, while the majority is directed aft, towards the subspace field generation device ("the sphere").
Also found in the structural channels are two other major "plumbing" systems... a second reactor core feed line (each of which carries the other half of the individual reactor chamber row output, that which is not carried by the central core element) and a primary coolant system line.
This gives five channels, all carrying high-output matter/antimatter reaction products (not counting the tap to the main energizer) which are used to generate the subspace field.
The field is generated by focusing the five "streams" at the very center of the field generator sphere. The central "feed" is fixed, as are the lower two. However, the upper two can be "tweaked" by diverting a portion of their flow through an intercooler device.
Controlling the flow... the delivery of energy... from the outer four conduits results in an assymmetrical energy field, and thus a tendency for the ship to "turn" while at warp.
With two nacelles, the output of both nacelles can be adjusted to allow for a lateral turn. To allow for 3-dimensional manuevering, a set of intercoolers assist, allowing significantly higher energy-delivery-reduction for the upper channels. When primary m/am reaction product in these conduits is cooled significantlym, the energy flow in these upper pathways, is reduced. This causes the the effective energy field in the subspace field generators will be more significantly distorted, allowing for the ship to steer sharply upwards.
While any of the conduits can have their flow reduced, or can be diverted to the cooling devices, the most effective means of controlling directionality within a single nacelle is through directing the upper flows through the intercoolers. This explains why the ship tends to "bank" when turning when at warp... the ship turns upwards more easily than it does downwards. If the ship had only lower-mounted intercoolers, it would be easier to "nose down."
(The installation of additional "underside" intercoolers was "cost-reduced" out of the design, as under most circumstances this adds no additional performance yet imparts a significant mass penalty to the ship.)
The field tends to propagate directionally from the main field generator, with a slight forward distortion. By adjusting the focal point of the field convergence in the sphere, the overall distortion of the subspace field can be controlled, but only within certain practical limits.
Additional field stability is provided by the installation of fixed "subspace field generator coils" which are located in the gaps between m/am reactor chambers, and are charged by the adjacent two chambers. These coils do not generate a "warp" field, but support the primary field, increasing and amplifying its strength along the line-of-action of the vessel.
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That's all I've come up with so far...
Now I have to replicate the "reactor cores" another seven times. This is pretty simple, though, since I only had to model one, and then "pattern" it to create what you see here. I'll do the same for the "stabilizer coils" which I'm going to model as well.
In the nacelles, I have a series of cylindrical reactors. You can see one of those pretty clearly, below.

Now, an in-universe explanation of what's going on here:
********************
The matter (in the form of simple hydrogen), superheated by a fusion device, slightly cooled as it leaves the "control reactor," and then flowed into a distribution manifold along the central axis, is injected into each of these reactor chambers, in a closely-controlled sequence. Note that each chamber is slightly smaller than the one forward of it... this is by design.
The antimatter is contained in a facility at the aftmost end of the nacelle (roughly "box" shaped, extending beyond either side of the nacelle body). From here, the antimatter is injected into one of four shielded antimatter transfer tubes, which are found in the four aft nacelle main structural channels. The antimatter is delivered to the reactor chambers via these manifolds.
There are four rows of reactor chambers, spaced 45 degrees apart. All four dump half of their output into the central "reactor core feed line" where some is channeled towards the secondary hull main energizer to produce usable power for the ship, while the majority is directed aft, towards the subspace field generation device ("the sphere").
Also found in the structural channels are two other major "plumbing" systems... a second reactor core feed line (each of which carries the other half of the individual reactor chamber row output, that which is not carried by the central core element) and a primary coolant system line.
This gives five channels, all carrying high-output matter/antimatter reaction products (not counting the tap to the main energizer) which are used to generate the subspace field.
The field is generated by focusing the five "streams" at the very center of the field generator sphere. The central "feed" is fixed, as are the lower two. However, the upper two can be "tweaked" by diverting a portion of their flow through an intercooler device.
Controlling the flow... the delivery of energy... from the outer four conduits results in an assymmetrical energy field, and thus a tendency for the ship to "turn" while at warp.
With two nacelles, the output of both nacelles can be adjusted to allow for a lateral turn. To allow for 3-dimensional manuevering, a set of intercoolers assist, allowing significantly higher energy-delivery-reduction for the upper channels. When primary m/am reaction product in these conduits is cooled significantlym, the energy flow in these upper pathways, is reduced. This causes the the effective energy field in the subspace field generators will be more significantly distorted, allowing for the ship to steer sharply upwards.
While any of the conduits can have their flow reduced, or can be diverted to the cooling devices, the most effective means of controlling directionality within a single nacelle is through directing the upper flows through the intercoolers. This explains why the ship tends to "bank" when turning when at warp... the ship turns upwards more easily than it does downwards. If the ship had only lower-mounted intercoolers, it would be easier to "nose down."
(The installation of additional "underside" intercoolers was "cost-reduced" out of the design, as under most circumstances this adds no additional performance yet imparts a significant mass penalty to the ship.)
The field tends to propagate directionally from the main field generator, with a slight forward distortion. By adjusting the focal point of the field convergence in the sphere, the overall distortion of the subspace field can be controlled, but only within certain practical limits.
Additional field stability is provided by the installation of fixed "subspace field generator coils" which are located in the gaps between m/am reactor chambers, and are charged by the adjacent two chambers. These coils do not generate a "warp" field, but support the primary field, increasing and amplifying its strength along the line-of-action of the vessel.
*********************
That's all I've come up with so far...
Now I have to replicate the "reactor cores" another seven times. This is pretty simple, though, since I only had to model one, and then "pattern" it to create what you see here. I'll do the same for the "stabilizer coils" which I'm going to model as well.