Traveller Store CotI Features New Posts Mark Forums Read Register


Go Back TravellerRPG.com > Citizens of the Imperium > Other Versions of Traveller > Mongoose Traveller

Mongoose Traveller Discussion forums for the Traveller rules from Mongoose Publishing.

Reply
 
Thread Tools Display Modes
  #1  
Old September 13th, 2011, 11:24 PM
cryingblackoil cryingblackoil is offline
Citizen: SOC-5
 
Join Date: Sep 2011
Posts: 12
Gallery : 0
cryingblackoil Citizen
Default Air/Raft

Ok. Quick question. There has been some discussion about whether grav technology, specifically air/rafts, can function in deep space without a sizable chunk of mass like a planet to push/pull against. Any thoughts?
Reply With Quote
  #2  
Old September 14th, 2011, 02:23 AM
kilmore kilmore is offline
Citizen: SOC-10
 
Join Date: Jul 2011
Posts: 72
Gallery : 0
kilmore Citizen
Default

I would say yes, as it appears that maneuver drives function without pushing against anything, and if I recall correctly, the maneuver drives work on grav principles. I'd say the gravitic energy is pushing against the ship / air-raft itself.
Reply With Quote
  #3  
Old September 14th, 2011, 03:39 AM
E.D.Quibell E.D.Quibell is offline
Citizen: SOC-13
 
Join Date: Sep 2002
Location: Worthing
Posts: 884
Gallery : 1
E.D.Quibell Citizen
Default

In MT Air Rafts use Standard Grav Drives that push against a gravity well. If you use these on a space craft you lose 50% of you drive potential past 10 diamiters of the planet.

Thruster on the other hand can fit into anything over 20 tons push on themselves, so never lose dirve potential.

In MgT I have no idea though.

Best regards,

Ewan
Reply With Quote
  #4  
Old September 14th, 2011, 05:45 AM
aramis's Avatar
aramis aramis is offline
Administrator
 
Join Date: May 2001
Location: Anchorage, AK, USofA
Posts: 29,057
Gallery : 53
Visit aramis's Blog
aramis has disabled reputation
Send a message via ICQ to aramis Send a message via AIM to aramis Send a message via Yahoo to aramis
Default

Note that T4 and T5, Thruster plates die at 1000 diameters...
__________________
~ Aramis
aramis.hostman.us /trav
Smith & Wesson: The Original Point and Click interface!

Archduke of Sylea (CORE 2118)
Duke of the Third Imperium (SPIN 0534)
Count Terra (SOLO 1827)
Count Gorod (REFT 1302)
Count of the Third Imperium (SPIN 2232)
Viscount of Adabicci (SPIN 1824)
Marquis of the Solomani Rim (SOLO 0606)
Marquis of the Third Imperium (SPIN 2410)
Baron of the Third Imperium (SPIN 2231)
Knight of the Iridium Throne (CORE 1434)
Sir William Hostman (OLDE 0512)
Sir William Hostman (DAGU 0622)
Knight of Deneb (REFT 2239)
Knight of Deneb (Spin 2532)
SEH w/Diamonds for Extreme Heroism - Battle of Boughene
MCG - Battle of Boughene
TAS: William Hostman (CORR 2506)
TAS: Bearer (DAIB 1326)
IMTU ct+ tm++ tne tg-- tt+ tmo+ t4- t20+ to ru+ ge+ 3i+ c+ jt au ls pi+ ta he+ st+
Wil Hostman 0602 C539857-9 S A724
OTU: 95% 3i an+ au+ br- cpu± dt± f+ fs++ ge± ih- inf± j± jf+ jm+ jt+ ls- n= nc+ pi+ pp-- tp+ tr+ tv- vi-- xb+-
Unless there is bold red text, presume my posts to be my personal material only.
Reply With Quote
  #5  
Old September 14th, 2011, 07:31 AM
BytePro BytePro is offline
Citizen: SOC-14
 
Join Date: Jan 2009
Posts: 1,711
Gallery : 0
BytePro Citizen
Default

MgT is based on CT, which, as far as I know, did not have this concept... certainly haven't come across it in any of the MgT books.

I think the authors intentionally left this vague in MgT - especially if one looks at air rafts.

IMTU, gravitic systems 'create gravity' as well as manipulate existing 'gravitic fields' - so no 'external' gravity is required. Of course, this seems less believable, especially for small devices like grav belts', which I suspect is one of the reasons for the other versions of Traveller to make a distinction. For myself, I make it simple and keep gravitics purely in a fictional realm, rather than trying to tie it to real life physics and perceptions - which just means more effort for no real gain, as it will utterly fail for those of us not more gifted than Einstein.

Like all handwaves, there comes the question of suspension of disbelief - but gravitics (gravity control, not gravity) is fantasy, not science.
Reply With Quote
  #6  
Old September 14th, 2011, 11:07 AM
samuelvss's Avatar
samuelvss samuelvss is offline
Citizen: SOC-14
 
Join Date: Jul 2007
Location: Blacksburg
Posts: 1,237
Gallery : 15
samuelvss Citizen
Default

IMTU, grav only works in a planet's gravity well.

A CT Air/Raft has a rather weak grav system, so is more closely tied to a planet.

IIRC correctly, there was something in the CT description of an Air/Raft as "a light duty grav vehicle that uses null-grav units to counteract gravity for lift and propulsion." If there is no gravity to counteract, there is no propulsion, but there is always some. I describe it to my players as being not enought to work with outside 100 diameters, and halved by 10 diameters.
__________________
Essayons!

SVSS


- - - - - - - - - - - - - - - - - - - - -

"Leave the gun; take the cannoli."
Reply With Quote
  #7  
Old September 14th, 2011, 11:57 AM
far-trader far-trader is offline
Noble
 
Join Date: Jul 2001
Location: Regina Subsector aka SK, Canada ;-)
Posts: 13,724
Gallery : 12
Visit far-trader's Blog
far-trader Citizen
Default

Quote:
Originally Posted by BytePro View Post
MgT is based on CT, which, as far as I know, did not have this concept...
Actually it does. As samuelvss notes, the CT grav vehicles can only make orbit, and only very slowly at that (except for the Speeder). Taking 1 hour per planet size digit. And orbit is as far as they can get before they are incapable of further thrust.

Ships and small craft on the other hand can make orbit in minutes and travel between planets at full thrust.

Two very different systems are evident and in use.

As you note, being based on CT, MgT should have similar notes and performance.

Quote:
Originally Posted by BytePro View Post
I think the authors intentionally left this vague in MgT...
That wouldn't be my first conclusion
__________________
Dan "far-trader" Burns

Original material in this post may be employed for personal non-profit use with the origin noted. Any other use is subject to permission from the author. Contact me through the private message feature of this board.

Fund Rare Bard Rants - Donate your unused rants today!

Musings of an old Trader... (my CotI Travellog) updated - May 3 2012
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Who needs an Air-Raft when you have one of these in the garage? Sifu Blackirish Random Static 14 May 7th, 2009 10:22 PM
tbeard's air/raft Mithras The Fleet 23 April 4th, 2009 02:54 PM
Air/raft views Trent The Lone Star 0 July 27th, 2008 06:43 PM
Air Raft Scarecrow The Lone Star 66 October 31st, 2004 02:02 PM
Air/raft size eclipse T20 - Traveller for the D20 System 3 April 5th, 2003 10:28 AM

This website and its contents are copyright ©2010- Far Future Enterprises. All rights reserved. Traveller is a registered trademark of Far Future Enterprises .
Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright (c) 2010-2013, Far Future Enterprises. All Rights Reserved.