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PlaywithLAMs
Capellan Confederation
Si-ben-bing
Joined: 08-Mar-2010 14:01
Posts: 98
Location: United States
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 Posted: 03-May-2010 20:49 Post subject: ? about gravity decks |
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| How do I determine the size of a gravity deck for a spacecraft? How far does the gravity deck's artificial gravity field extend?
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Stinger
The Knights of Chaos
General
Joined: 30-Apr-2002 00:00
Posts: 1833
Location: United States
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| Posted: 03-May-2010 21:50 Post subject: ? about gravity decks |
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From what I remember they come in 50, 100, 150 meter units.
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Stinger
If it's "creepy" to use the Internet, military satellites, and robot aircraft to find a house full of gorgeous young models so I can drop in on them unexpected, then FINE, I'm "creepy". Howard Wolowitz. BBT.
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Vagabond
Mercenary
Mr. Referee
Joined: 04-Feb-2002 00:00
Posts: 5791
Location: United States
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| Posted: 04-May-2010 03:39 Post subject: ? about gravity decks |
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The gravity is caused by motion not by a generated field.
see this article- rotation
en.wikipedia.org/wiki/Artificial_gravity
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Rudel Gurken
Allisters Light Thunder
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Joined: 15-Jun-2005 00:00
Posts: 1470
Location: Germany
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| Posted: 04-May-2010 10:26 Post subject: ? about gravity decks |
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You can choose the Diameter of your Grav Deck.
There are three categories for determining weight and costs (diameter each):
Small: < 100m
Medium: 100 - 250m
Heavy: > 250m (only allowed for Space Stations)
As Vagabond pointed out they don't produce gravity via a strange gravity field but by plain and simple centrifugal force.
So only things and persons on the Grav Deck itself experience gravity. The rest of the ship doesn't.
If the ship accelerates or deccelerates (or performs any maneuver at all) the Grav Deck has to be locked in place for that time.
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Reality is where the Pizza-man comes from!'Gucken, petzen, verpissen!' (Look at it, squeal it, get the hell away from it!) – Motto of the recon troops'Artillery doesn´t know friend or foe! They only know worthwhile targets!‘ – Kuritan Infantrist
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ralgith
Blighted Sun Battalion
1st Company
"Ralgith's Renegades"
Colonel
Joined: 18-Aug-2003 00:00
Posts: 2021
Location: United States
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| Posted: 07-May-2010 13:42 Post subject: Re: ? about gravity decks |
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| Rudel Gurken wrote: | You can choose the Diameter of your Grav Deck.
There are three categories for determining weight and costs (diameter each):
Small: < 100m
Medium: 100 - 250m
Heavy: > 250m (only allowed for Space Stations)
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Most Warship and Jumpship grav decks are 80 to 120 meters if you look at their specs (for canon units I mean). Though I think there are a few smaller than 80, I can't think of any larger than 120 right now.
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Colonel Ralgith t'Mayasara
Blighted Sun Battalion
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Rudel Gurken
Allisters Light Thunder
Major
Joined: 15-Jun-2005 00:00
Posts: 1470
Location: Germany
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| Posted: 08-May-2010 02:24 Post subject: Re: ? about gravity decks |
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Sure, you have to think a bit before choosing a diameter 
A 270 m long ship would look rather funny with a 250 m grav deck 
The smallest grav decks in official designs have 40 m diameter (Merchant jumpship) and the biggest have 210m (Avalon Cruiser).
A lot of the bigger ships have two or three grav decks and the Leviathan even 8.
The Olympus Recharge Station on the other side has an 1230 m grav deck.
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Reality is where the Pizza-man comes from!'Gucken, petzen, verpissen!' (Look at it, squeal it, get the hell away from it!) – Motto of the recon troops'Artillery doesn´t know friend or foe! They only know worthwhile targets!‘ – Kuritan Infantrist
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Sleeping Dragon
Draconis Combine
Tai-i
Joined: 06-Apr-2005 00:00
Posts: 4820
Location: Czech Republic
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| Posted: 08-May-2010 04:07 Post subject: Re: ? about gravity decks |
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Flying saucers anyone? 
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PlaywithLAMs
Capellan Confederation
Si-ben-bing
Joined: 08-Mar-2010 14:01
Posts: 98
Location: United States
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| Posted: 11-May-2010 10:15 Post subject: Re: ? about gravity decks |
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| Thanks everyone for your input. I guess I'll just choose the gravity deck sizes arbitrarily.
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Vagabond
Mercenary
Mr. Referee
Joined: 04-Feb-2002 00:00
Posts: 5791
Location: United States
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| Posted: 12-May-2010 08:58 Post subject: ? about gravity decks |
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or you could read a little and make an informed choice;
| wrote: | | To reduce Coriolis forces to livable levels, a rate of spin of 2 rpm or less would be needed. To produce 1g, the radius of rotation would have to be 224 m (735 ft) or greater, which would make for a very large spaceship. [snip] Artificial gravity at 0.1g would require a radius of only 22 m (74 ft). | - Wikipedia
So decide how much gravity you want the crew to experience, multiply the gravety by 10, and then multiply it by 22.4 to determine the radius needed.
0.1g of artificial gravity = 22.4m radius gravdeck
0.4g of artificial gravity = 89.6m radius gravdeck
0.5g of artificial gravity = 112m radius gravdeck
1.0g of artificial gravity = 224m radius gravdeck
so this is your choices:
small gravdeck (up to 99m) - weight 50 tons; max Gs generated 0.44g)
medium gravdeck (up to 250m) - weight 100 tons; max Gs generated 1.11g)
large gravdeck (up to 1500m) - weight 500 tons; max Gs generated 6.69g)
Note - you can have a number of gravdecks equal to 3 + 1 per 100,000 tons.
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one must work hard to cultivate the mind and body. and one must always cultivate the mind.
//^(^_^)^\\
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