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Medusa-C (The end of the SDP?)

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Re: Medusa-C (The end of the SDP?)
Post by Relax   » Fri Apr 15, 2016 8:18 pm

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Grayson Class BC'P, Courvoisar II has 360 pods per HoS using the old style giant capital 3 stage missiles. It is what the BC'P was designed around. Grayson did not have the Fusion powered 3 stage missiles till later due to Janacek Admiralty cutting off Grayson/Manticoran joint R&D in 1917. On top of this, the Grayson BC'P variant also keeps broadside missile tubes.

So, yes, the BC'P initial loadout of 360 pods is much greater now. At least the Grayson version.

From Storm From the Shadows we know conclusively, that Ajax, certainly did only have 360 pods. Of course that number is still slightly low as pods underwent one more change post early 1920.

We can infer the GSN BC'P must be very fragile in comparison to the RMN BC'P. Has larger pod core and it has broadside tubes as well. Keyhole? No, unless late versions added it... Otherwise identical mass.

Counter argument: 1920 HoS uses new pods instead of the pods it was designed with... If this is the case, why do all the ship classes reflect their initial acceleration, not their upgraded acceleration?
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Re: Medusa-C (The end of the SDP?)
Post by Theemile   » Fri Apr 15, 2016 8:51 pm

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Relax wrote:Grayson Class BC'P, Courvoisar II has 360 pods per HoS using the old style giant capital 3 stage missiles. It is what the BC'P was designed around. Grayson did not have the Fusion powered 3 stage missiles till later due to Janacek Admiralty cutting off Grayson/Manticoran joint R&D in 1917. On top of this, the Grayson BC'P variant also keeps broadside missile tubes.

So, yes, the BC'P initial loadout of 360 pods is much greater now. At least the Grayson version.

From Storm From the Shadows we know conclusively, that Ajax, certainly did only have 360 pods. Of course that number is still slightly low as pods underwent one more change post early 1920.

We can infer the GSN BC'P must be very fragile in comparison to the RMN BC'P. Has larger pod core and it has broadside tubes as well. Keyhole? No, unless late versions added it... Otherwise identical mass.

Counter argument: 1920 HoS uses new pods instead of the pods it was designed with... If this is the case, why do all the ship classes reflect their initial acceleration, not their upgraded acceleration?



I would say HoS reflects original loadout or last major refit loadout. The Medusa and Harrington have roughly the same pod loadout as they originally had - just a little over 500. But as with everything, that's just a guess.
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Re: Medusa-C (The end of the SDP?)
Post by Bill Woods   » Fri Apr 15, 2016 10:10 pm

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darrell wrote:DW has said that [BuShips] is rethinking the Harrington B on grounds of survivability, with off bore firing, delayed activation, and the technology found in the Roland missile tubes, you can get the same rate of fire and salvo density as you would get from a podnought without the pods.

The 6 missile tubes on the Roland take up no more space than two missile tubes that are the chase armament of the warrior heavy cruiser that is 20% larger.
By the way, how is that supposed to work? For the stern tubes, sure: just pump out the missiles and let the ship run away from them at x hundred gees before they launch. But the bow tubes have to throw the missiles far enough ahead that the ship won't eat them, and a CL is presumably accelerating faster than a CA.
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Re: Medusa-C (The end of the SDP?)
Post by darrell   » Sat Apr 16, 2016 1:37 am

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Bill Woods wrote:
darrell wrote:DW has said that [BuShips] is rethinking the Harrington B on grounds of survivability, with off bore firing, delayed activation, and the technology found in the Roland missile tubes, you can get the same rate of fire and salvo density as you would get from a podnought without the pods.

The 6 missile tubes on the Roland take up no more space than two missile tubes that are the chase armament of the warrior heavy cruiser that is 20% larger.
By the way, how is that supposed to work? For the stern tubes, sure: just pump out the missiles and let the ship run away from them at x hundred gees before they launch. But the bow tubes have to throw the missiles far enough ahead that the ship won't eat them, and a CL is presumably accelerating faster than a CA.


throw them out in a horizontal arc, but not directly ahead. That way as the ship accelerates past the missiles fall between the wedges and out kilt of the wedge.
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Re: Medusa-C (The end of the SDP?)
Post by darrell   » Sat Apr 16, 2016 2:07 am

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Theemile wrote:
Relax wrote:Grayson Class BC'P, Courvoisar II has 360 pods per HoS using the old style giant capital 3 stage missiles. It is what the BC'P was designed around. Grayson did not have the Fusion powered 3 stage missiles till later due to Janacek Admiralty cutting off Grayson/Manticoran joint R&D in 1917. On top of this, the Grayson BC'P variant also keeps broadside missile tubes.

So, yes, the BC'P initial loadout of 360 pods is much greater now. At least the Grayson version.

From Storm From the Shadows we know conclusively, that Ajax, certainly did only have 360 pods. Of course that number is still slightly low as pods underwent one more change post early 1920.

the change to the flat pack missile pods happened before 1920, as there is multiple references to the new flat pack p

We can infer the GSN BC'P must be very fragile in comparison to the RMN BC'P. Has larger pod core and it has broadside tubes as well. Keyhole? No, unless late versions added it... Otherwise identical mass.

Counter argument: 1920 HoS uses new pods instead of the pods it was designed with... If this is the case, why do all the ship classes reflect their initial acceleration, not their upgraded acceleration?



I would say HoS reflects original loadout or last major refit loadout. The Medusa and Harrington have roughly the same pod loadout as they originally had - just a little over 500. But as with everything, that's just a guess.


First came the flat pack missile pod, which was in use prior to 1920

The first Agamemnon-class pod battlecruiser was commissioned in 1919 PD.

that means that for the BCP, it is 360 FLAT PACK missile pods, as the old style pods were being phased out as the argamemnon was being commissioned.

AAC says that in 1920 tractors were added to the flat pack missile pods.
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Re: Medusa-C (The end of the SDP?)
Post by Relax   » Sat Apr 16, 2016 2:36 am

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darrell wrote:throw them out in a horizontal arc, but not directly ahead. That way as the ship accelerates past the missiles fall between the wedges and out kilt of the wedge.


Don't even have to do that. If a ship has pressers/tractors, all you gotta do is nudge them out just far enough to clear your impeller ring. Off hand I would argue that the onboard RCS thrusters of the missile itself could do the job just fine. We are talking all of ~30m in regards to a ROLAND. ~100m for a nice wide clearance.
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Re: Medusa-C (The end of the SDP?)
Post by darrell   » Sat Apr 16, 2016 6:37 pm

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Relax wrote:
darrell wrote:throw them out in a horizontal arc, but not directly ahead. That way as the ship accelerates past the missiles fall between the wedges and out kilt of the wedge.


Don't even have to do that. If a ship has pressers/tractors, all you gotta do is nudge them out just far enough to clear your impeller ring. Off hand I would argue that the onboard RCS thrusters of the missile itself could do the job just fine. We are talking all of ~30m in regards to a ROLAND. ~100m for a nice wide clearance.


you need to spread them out with enough velocity that they can start their wedges without fracticide
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Re: Medusa-C (The end of the SDP?)
Post by Relax   » Sat Apr 16, 2016 9:34 pm

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darrell wrote:you need to spread them out with enough velocity that they can start their wedges without fracticide


Actually, you do not, as acceleration of the ship alone will spread them out. Also, a object in motion remains in motion is still valid. Just means initiation wedge time is dependent on the RCS thrusters dispersal velocity combined with the acceleration of the ship divided by number of missile wedge size when activated for total number allowed to be fired.

IE you ripple fire your missiles. Not group fire. Though even a tenth of a second difference quickly turns into kilometers of separation over a little time.
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Re: Medusa-C (The end of the SDP?)
Post by Jonathan_S   » Sun Apr 17, 2016 3:53 pm

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Relax wrote:
darrell wrote:throw them out in a horizontal arc, but not directly ahead. That way as the ship accelerates past the missiles fall between the wedges and out kilt of the wedge.


Don't even have to do that. If a ship has pressers/tractors, all you gotta do is nudge them out just far enough to clear your impeller ring. Off hand I would argue that the onboard RCS thrusters of the missile itself could do the job just fine. We are talking all of ~30m in regards to a ROLAND. ~100m for a nice wide clearance.

It's also possible that the compensator field stretches far enough out in front for bow fired missiles to remain I it until they can light their drive. While within the same compensation field as the ship they are a equivalent of zero g with respect to it. Don't want matter that the ship is pulling over 500 g; until the missile clears the field it continues moving away at th same rate it was launched at. Ships accel (or not) is irrelevant.

Although the zone you could light the drive in is pretty constrained if the sidewalls are up. The missile wedge is 10km wide and the sidewalls are only a hair over 20km apart; and extend to the forward edge of the wedge which can be up to 150km ahead of the ship. Fortunately you've got quite a bit more room vertically.
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Re: Medusa-C (The end of the SDP?)
Post by darrell   » Sun Apr 17, 2016 6:24 pm

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Jonathan_S wrote:
Relax wrote:Don't even have to do that. If a ship has pressers/tractors, all you gotta do is nudge them out just far enough to clear your impeller ring. Off hand I would argue that the onboard RCS thrusters of the missile itself could do the job just fine. We are talking all of ~30m in regards to a ROLAND. ~100m for a nice wide clearance.

It's also possible that the compensator field stretches far enough out in front for bow fired missiles to remain I it until they can light their drive. While within the same compensation field as the ship they are a equivalent of zero g with respect to it. Don't want matter that the ship is pulling over 500 g; until the missile clears the field it continues moving away at th same rate it was launched at. Ships accel (or not) is irrelevant.

Although the zone you could light the drive in is pretty constrained if the sidewalls are up. The missile wedge is 10km wide and the sidewalls are only a hair over 20km apart; and extend to the forward edge of the wedge which can be up to 150km ahead of the ship. Fortunately you've got quite a bit more room vertically.


the compensator field doesn't extend very far beyond the ship skin. the smaller the field is, the more efficient the compensation is and the faster the ship.

The ship is not in the center of the wedge but toward the back. Example on a 300KM wedge, there will be 200-250KM of wedge in front of the ship, only 50-100KM behind the ship.
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