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T4 - Marc Miller's Traveller Discussion of T4 - Marc Miller's Traveller from Imperium Games and the Milieu 0 setting.

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Old March 21st, 2009, 04:17 PM
warwizard warwizard is offline
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Default Missile designs from T4 FF&S

Greetings all this thread is for presenting and discussing space combat missiles designed using Marc miller's traveller Fire Fusion and Steel as well as house rules to deal with situations not covered in the official rules.

Maneuver drives for missiles:
Available for use in small missiles are chemical, Heplar, Fusion Rocket, and exotic drives (daedaelus, nuclear rocket, ion drive) Thruster plates and contragrav

The drives that do not require a seperate power system are the nuclear and fusion rockets, chemical rockets, and daedalus, all the other drives require electrical input requiring a power system

Each drive has a maximum acceleration it is capable of, as well as a fuel usage rate.

Chemical solid propellant can have over 300G's acceleration, however fuel rates makes these drives unsuitable for any but short range applications. Chemical liquid propellant drives have a lower maximum acceleration 132G's and a better fuel rate compared to the solid propellent rockets. For space combat missions the job of point defense seems the only suitable missions for chemical propellant drives perhaps also dogfighting missiles for fighters/small craft.

Fusion rockets have a maximum acceleration of 9 G's but are truly misers with the fuel making long duration missions the forte of the fusion rocket. Minimum size requirements makes for minimum of 1 Dt for missiles using this thruster.

Daedalus drives have 1.5 G max acceleration but are the best fuel use at 1/7th the rate of the fusion rocket, and can be used in smaller installations useful for long duration cruise missions sub micro sized drones and the such, hower the fusion pellet detonations make it less stealthy than an Ion drive for the stealth missions.

Other nuclear rockets can obtain maximum of 12G's but have very high fuel usage rates producing missiles that might have somewhat limited endurance, but quite suitable otherwize.

For the drives that require electrical input we have Heplar, Ion drive, Thruster plate, and contragravity.

Maximum Heplar G's is 200 G's but as you also must supply 1 M/W minimum electrical power per 200 KN so performance of Heplar systems are highly dependant on the power systems installed with higher power densities producing corespondingly better performance. long endurance Heplar systems are possiable with fusion power systems.

Ion drives are unsuitable for combat missions. Maximum G's are fractional and power needed is enormous. Used for extreame endurance missions utilizing solar panel power systems or nuclear/fusion power systems. very small systems using sub 1Kw power can be used for stealth approaches for intellegence gathering missions.

Thruster plates may not be used in some hard science campaigns but have a maximum G's of 20 G's No fuel needed and half the input power/Kn of the Heplar. Minimum thrust requirements make for fairly large missiles, however endurance is determined by that of the power system. With a fusion power plant a thruster plate missile is able to reach speed of light.

Contragravity drives are useful only within ten diamaters of a large mass. Applications that come to mind are gas giant area denial systems able to dive deep into the atomsphere and attack lurking SDBs. Within their area of use contragravity missiles can provide decent MW/Kn rates and require no fuel. Endurance is that of the power systems installed. Maximum G's are generally much less than one G and get better the stronger the grav field they are deployed in.

I'll continue this in another post if there is interest.

Last edited by warwizard; March 26th, 2009 at 11:34 PM.. Reason: remove batteries as option for Heplar
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