MT: RM Open Frame Hull Configuration (again)

[snrdg082102]

Per MT: RM p. 63

Spacecraft and starships require a minimum armor value of 40 for protection against micrometeorites and radiation

Does the above mean that any craft designed to operate in space with an open frame hull configuration the structure has value of 40?

Sorry to be dense.

 

[aramis]

Per MT: RM p. 63


Does the above mean that any craft designed to operate in space with an open frame hull configuration the structure has value of 40?

Sorry to be dense.

yep.

Only 8 if disposable.

 

[Swiftbrook]

Only 8 if disposable.

Reference on this? I'm assuming your saying fuel drop tanks only need an armor value of 8 instead of 40.

-Swiftbrook

 

[snrdg082102]

yep.

Only 8 if disposable.

Hello aramis,

Thanks for the yep that I got the open frame hull as having a structure rated at 40.

Next a silly question or two.

Question 2: Would I use Armor Steps 1 - 7 to 1 - 10 to calculate hull weight and cost?

Question 3. What is the reference source indicating that a disposable frame can have a value of 8?

 

[shield]

Think the disposable value of 8 came from the primitive spaceship rules. They were in the 2 small steps article in Challange and then in Hard Times.

 

[snrdg082102]

Think the disposable value of 8 came from the primitive spaceship rules. They were in the 2 small steps article in Challenge and then in Hard Times.

Thanks shield I have a electronic copy of Hard Times that I can look at.

 

[snrdg082102]

Reference on this? I'm assuming your saying fuel drop tanks only need an armor value of 8 instead of 40.

-Swiftbrook

Hello Swiftbrook,

I missed your post and got shields answered first. Anyway shield pointed me toward Hard Times which on page 83

Step 8: Minimum Armor
Certain vehicles designed in this sequence may be disposables they are not expected to be reclaimed and used again. One example would be any rockets which provide initial liftoff thrust and are then jettisoned to bum up in the atmosphere.
A disposable component that is not intended to leave the atmosphere must have a hull armor rating of 4 or more. A disposable component leaving the atmosphere must have a hull armor rating of 8 or more.

Of course I haven't really had time to really check out the entire section yet.

 

[aramis]

Reference on this? I'm assuming your saying fuel drop tanks only need an armor value of 8 instead of 40.

-Swiftbrook

Depends on how long you expect to have those drop tanks on...

MT Hard Times, page 83, RC:

Step 8: Minimum Armor
Certain vehicles designed in this sequence may be disposables — they
are not expected to be reclaimed and used again. One example would be any rockets which provide initial lift-off thrust and are then jettisoned to bum up in the atmosphere.
A disposable component that is not intended to leave the atmosphere must have a hull armor rating of 4 or more. A disposable component leaving the atmosphere must have a hull armor rating of 8 or more.​

 

[Swiftbrook]

Thanks.

The only thing I currently can think of as disposable for starships is drop tanks. They don't have a minimum armor value, just simple rules on page 83:

Drop Tanks: Disposable tanks which provide fuel while reducing ship tonnage. Tanks are mounted only when needed and dropped away prior to jump. They do not affect the routine performance of the ship. Cost is Cr 10,000 plus Cr 75 per kiloliter of drop tank.

Nice and simple.

-Swiftbrook

 

[snrdg082102]

Depends on how long you expect to have those drop tanks on...

MT Hard Times, page 83, RC:

Step 8: Minimum Armor
Certain vehicles designed in this sequence may be disposables — they
are not expected to be reclaimed and used again. One example would be any rockets which provide initial lift-off thrust and are then jettisoned to bum up in the atmosphere.
A disposable component that is not intended to leave the atmosphere must have a hull armor rating of 4 or more. A disposable component leaving the atmosphere must have a hull armor rating of 8 or more.
​

The quoted material looks very familiar

 

[snrdg082102]

Thanks.

The only thing I currently can think of as disposable for starships is drop tanks. They don't have a minimum armor value, just simple rules on page 83:



Nice and simple.

-Swiftbrook

Yes, nice and simple however Hard Times, from what shield recalls, consolidated two Challenge articles that expanded the basic system in the Referee's Manual. COACC and the three part article Wet Navy ship design (Challenge 53, 54, and 60) has added more detail. COACC allows more detail in aircraft design while Wet Navy allows you to do the same for water craft. MT: Robots has added another way to create more items for MT.

Do I use the Armor modifiers when calculating an open frame space hull's weight and cost since a space vessel has to have a minimum protection value of 40?