Darn good question, and now you have me pondering too...
Grav Modules
- Thread starter gchuck
- Start date
Darn good question, and now you have me pondering too...
More information: http://wiki.travellerrpg.com/Grav_Plate
Please feel free to add to article, make edits, etc.
Shalom,
M.
Please feel free to add to article, make edits, etc.
Shalom,
M.
mike wightman
SOC-14 10K
Grav plates are part of a ship artificial gravity system.
Grav modules - or null grav modules to give them their full CT name - are what provides lift and propulsion in CT/Striker/MT...
Grav modules - or null grav modules to give them their full CT name - are what provides lift and propulsion in CT/Striker/MT...
And one that is easily answered.
Chromatic aberration comes from moving through a medium. Materials bend different light frequencies different amounts; bluer is more bend, redder is less, as a generality.
Gravitic lensing is bending spacetime, not refracting the wave; the light is still moving a line that appears straight at the level of the photon.
Gravitic aberration has a different result - all the waves from a given point bend the same amount, but the ones from a bit to the right/left/above/below bend a different amount, possibly in a different direction.
kilemall
SOC-14 5K
MT mentions a minimum size of grav drives:
MT RM, p66.
This would indicate a minimum size of 20 litres (40 kg), unless you use the very expensive TL-12 low power version with a minimum of 3 litres (2 kg) giving 0.1 tons of thrust for Cr30,000 requiring 0.001 MW power.
Being CT, I use the precursor to this for small grav designs, the grav modules from LBB8 Robots.
MT Ref's Manual predates LBB8. And was written by the same guy: joe Fugate.
mike wightman
SOC-14 10K
Are you sure MT RM predates LBB:8?
LBB:8 copyright 1986 with some material originating in Digest 1-3
MT RM copyright 1987
LBB:8 copyright 1986 with some material originating in Digest 1-3
MT RM copyright 1987
OK.
http://wiki.travellerrpg.com/Null_Grav_Module
*** Where can I read more about Grav Modules? ***
Books and pages, please, if possible.
Shalom,
M.
http://wiki.travellerrpg.com/Null_Grav_Module
*** Where can I read more about Grav Modules? ***
Books and pages, please, if possible.
Shalom,
M.
mike wightman
SOC-14 10K
The original grav vehicle entries in CT LBB:3 mention them, then there is the Adventure 12 Secret of the Ancients, Double Adventure 6 Divine Intervention, and Striker has this to say:
SotA mentions standard grav modules and heavy duty grav modules, while Striker only has the stats for what I am assuming are the heavy duty vehicle grav modules.
I'll edit in page numbers later.
SotA mentions standard grav modules and heavy duty grav modules, while Striker only has the stats for what I am assuming are the heavy duty vehicle grav modules.
I'll edit in page numbers later.
Last edited:
AnotherDilbert
SOC-14 1K
They are more or less the same, but LBB8 does not explicitly mention a minimum size.
AnotherDilbert
SOC-14 1K
LBB3'77, p17: "air/raft relies on solid state null gravity modules for lift and propulsion."
LBB3'81, p23: "null-grav modules to counteract gravity for lift and propulsion"
Design Sequences:
JTAS#3, p11
LBB8, p27
Striker, Book3, p8
Striker, Book3, p23
MT RM, p58
MT RM, p65
Tech Description:
CT Striker, Book 3, p5
MT RM, p56
MgT also uses anti-grav, but does not really define it.
Other editions seem to use contra-grav (lifters) that does not provide propulsion.
E.g.:
TNE Core, p332
FFS, p75
Thank you.
mike wightman
SOC-14 10K
Adventure 12 Secret of the Ancients pages 16-18
Double Adventure 6 Divine Intervention pages 7, 8, 10, 12.
Double Adventure 6 Divine Intervention pages 7, 8, 10, 12.
kilemall
SOC-14 5K
Hmm, while technically true, there are limiting factors of power required, volume used and relative thrust.
The logical choice for a grav belt type conveyance would be the LT grav module type. That is listed as Cr100000 10kg and TL12 in LBB3. Ten weeks range is a bit tough to swallow, but the rest works out fairly logically. 4kg worth of LT grav module comes in at Cr60000, that gets 200kg of 'thrust', figure 1kg of harness and controls, leaving 5kg for the power.
The battery tech doesn't work out, so I'd extrapolate the fuel cell into a mini version that produces 2 output for 1/5 the size. That's 4kg, leaving us just 1 kg for the fuel. .02 fuel use against 1kg gets us 50 hours. Ta-da! sorta a validation for grav belting, and a system to make more custom ones.
What IS missing from that table and commentary is what TL is each grav module type is available. I would houserule that each one comes available every 2 TL, so the UH ones are the original modules at TL8, HV at TL10 and LT at TL12- just in time for gravbelts.
Guess these aren't relevant for robot building as robot tech takes off at TL12 anyway.
AnotherDilbert
SOC-14 1K
Quite, but if we allow fractional power plants, we can equally well allow fractional grav modules.
So, if the OP wants to build a tiny grav drone, that is doable with LBB8 and CT Striker Book 3, but not with MT RM.
kilemall
SOC-14 5K
The LBB8 doesn't say what the minimum is for the modules, just sort of implied by the minimums and chassis weight. But ya if you extrapolate like I am, that would be a logical assumption.
Start by imagining a grav drone smaller than a matchbox car, with hi-def camera and probably equivalent sound sensor, cheap enough to be built by a player, being purchased in the hundreds of thousands and put to use by a planetary government likewise equipped with computers able to monitor them in real-time. There's not a lot of room left for the players to play in. I would think carefully about the full ramifications of that kind of tech available in the game universe. Whatever a player can build can also be used against him or her.
