HG 2008 Reaction Drive p. 42

[snrdg121408]

Hello all,

Until the new edition of HG is published, and I missed out on the beta copy, I am using Core Rulebook 2008 and HG 2008 to get a handle on spacecraft design.

HG 2008 p. 42 Spacecraft Options Drives: Reaction Drive; The reaction drive takes the same space as a Gravitic drive, and costs less, but this is off-set by the large fuel requirements in addition to fuel used for the jump drive and power plant.

I may have missed the reference of where to look for or calculate the reduced price for a reaction drive so I checked the HG Errata and came up with nothing. Going to the forums my search criteria of reaction drive cost returned a number posts, unfortunately I did not find an answer.

Can anyone please direct me to the source that details the reaction drive cost?

 

[AndrewW]

Can anyone please direct me to the source that details the reaction drive cost?

Only covered for small craft... (High Guard page: 58).

This is covered in the new version: "Reaction drives cost MCr0.2 per ton." (1/10 the cost of a manoeuvre drive).

 

[snrdg121408]

Can anyone please direct me to the source that details the reaction drive cost?

Only covered for small craft... (High Guard page: 58).

This is covered in the new version: "Reaction drives cost MCr0.2 per ton." (1/10 the cost of a manoeuvre drive).

Thank you AndrewW for the reply.

That throws a wrench into my working through the 2008 Traveller Core Rulebook and HG material on spacecraft design.

Since I do not have access to HG Beta would the above information be considered an addition to the HG 2008 Errata document and be acceptable to use until the new HG edition of the Spacecraft Design chapter is available for purchase?

 

[ShawnDriscoll]

High Guard for MgT 2nd Edition is a whole other ruleset for ship design, and other things.

 

[snrdg121408]

Hello ShawnDriscoll,

High Guard for MgT 2nd Edition is a whole other ruleset for ship design, and other things.

Thank you for the information, which means I needed to look for a different solution. I hope that what I have been told on the HG Playtest board about the published designs being redone using the new design system is true. If the designs are not redone then in my opinion the new edition the HG design systems are following in the foot steps of CT. One of the reasons I came back to MgT is that when CT Book 5 HG2 1980 and CT Book 2 1977/1981 came out none of the CT Book 2 1977 were reworked.
Under CT book 5 1980 and CT Book 2 1977/1981 rules the Express Boat can not be built and the Express Boat tender's mobile and pop-up turrets are an unresolved design issue.

The only design system I have access to is from Traveller Core Rule Book 2008 and HG 2008. Somehow the missing cost of the HG 2008 Reaction Drive on p. 42 has been overlooked for a very long time. Until the new HG is available all I have to design space vehicles are the first editions.

Per HG 2008 Spacecraft Options a reaction maneuver drive takes up the same space as a Gravitic drive and cost less.

Using the MCr0.2 per ton or 1/10th of a gravitic/reactionless maneuver drive that AndrewW provided in the post time stamped Mon Jan 25, 2016 12:10 am would make a spacecraft's reaction drive cheaper than the HG 2008 small craft.

Looking at how the HG 2008 edition Small Craft Design chapter a reaction maneuver drive is half the tonnage and cost of a Gravitic/reactionless maneuver drive.

Since a spacecraft's reaction maneuver drive occupies the same space as a gravitic/reactionless maneuver drive and the method provided from the new HG edition does not appear to be a good fit another solution may work until I have access to the new system.

My solution is that a reaction maneuver drive's cost is half of gravitic/reactionless drive cost of the same code letter.
In other words a Type-A reaction drive has a cost of MCr2 which is half the cost of the reactionless/gravitic Type-A drive.

Thank you again for the information.

 

[ShawnDriscoll]

I think I just had reaction drives cost the same back then (since they drank more fuel).

 

[AndrewW]

Thank you for the information, which means I needed to look for a different solution. I hope that what I have been told on the HG Playtest board about the published designs being redone using the new design system is true. If the designs are not redone then in my opinion the new edition the HG design systems are following in the foot steps of CT. One of the reasons I came back to MgT is that when CT Book 5 HG2 1980 and CT Book 2 1977/1981 came out none of the CT Book 2 1977 were reworked.

All ships starting from the new Core Rulebook should be built with the new system, all those in the new Core Rulebook where and the additional ships that will be in High Guard are being built with the new system. Don't know what the plans are as far as previously published ship books though. This doesn't make the old ships completely useless though, old ship designs can still be used, the new system while different still retains a lot of the old system. You wouldn't want to take one of the old designs and use it in combat using the new system but other then something like that you should be able to use them ok.

Looking at how the HG 2008 edition Small Craft Design chapter a reaction maneuver drive is half the tonnage and cost of a Gravitic/reactionless maneuver drive.

Half for the first part of the table, for the last part of the table it varies.

 

[snrdg121408]

Hi ShawnDriscoll,

I think I just had reaction drives cost the same back then (since they drank more fuel).

Having the cost the same is a good solution, unfortunately the solution is different from the text shown below.

HG 2008 p. 42:
"The reaction drive takes the same space as a gravitic drive, and costs less, but this is off-set by the large fuel requirements in addition to the fuel used for the jump drive power plant."

"Fuel requirement = 2.5% x Maximum Thrust x hours of Maximum Thrust required"

"For example, if a thrust of 4G for two hours is required, then 4 x 2 x 2.5 = 20% of the ship's tonnage must be dedicated to fuel."

Anyone know of a published system craft, not small craft, example that shows how to design a reaction drive ship?