Shipbucket
http://www.shipbucket.com/forums/

Rockets for a Sci-Fi Setting
http://www.shipbucket.com/forums/viewtopic.php?f=19&t=6509		 Page 2 of 2
Author:  citizen lambda [ March 8th, 2016, 1:16 pm ]
Post subject:  Re: Rockets for a Sci-Fi Setting
Re. the last comment on vernier thrusters and your explanation on thrust simulating gravity, I concur that you will have to look heavily into maneuver engines.
No complete flight is going to happen under constant acceleration; you might even want to consider decreasing velocity before arrival, if possible without everyone in your ship getting stuck to the "ceilings".
Basically, the simplest solution would be to turn around and use your engines to decelerate, and for that you will certainly need thrusters somewhere above the rockets to turn the whole ship around.
Author:  apdsmith [ March 8th, 2016, 3:18 pm ]
Post subject:  Re: Rockets for a Sci-Fi Setting
True, should be relatively easy to have a rotation \ transverse block between each landing leg \ radiator vane and a similar set up front for pitch and yaw control, it'd be, what? 8 sets of five thrusters, I think?
Author:  ezgo394 [ March 8th, 2016, 11:01 pm ]
Post subject:  Re: Rockets for a Sci-Fi Setting
There will be a set of 4 thrusters at the nose, and a set of 4 at the very bottom, just before the engine exhaust opening.
The plan is to have the rocket accelerate up to ~0.15c for about 5 days at 1g force, coast for 5 days (or whatever is required), turn towards the opposite direction and decelerate for 5 days until the ship stops. In that 5 day segment of coasting, there is no 'gravity' so that is where the artificial gravity comes into play. Actually, it's always on, and it compensates for whatever gravity forces that the engine is not producing.
Author:  ezgo394 [ August 22nd, 2016, 3:54 am ]
Post subject:  Re: Rockets for a Sci-Fi Setting
I've finally finished the main ship, the Appollo. I've made many changes from the original design and refined the detail. The major changes I made are: added a radio antenna on the systems deck and raised the deck. Removed half a floor of accommodations (which is now partial commons and the Captain and Chief Engineer's cabins); removed the CELSS and replaced it with two levels of storage, with the lower level being mostly for water storage; added radiators to the fins and showed a partial cutaway; moved external fuel tanks to above the landing legs, making the design sleeker; added a ladder access just beside the engine; and added the missing FTL level. I decided not to complete the interior design as, again, it wasn't really that necessary.

Now, looking at the ship, it's easy to identify the sections. Starting just below the nose is ship control and navigation, then accommodations (with flight computers and instruments between), food/water storage (windowless), cargo area and engineering level, with FTL, internal fuel, and the engine at the very base.

[ img ]


Engine: Single Lo-Hi Deuterium-Tritium (Lo)/Helium3-Deuterium (Hi) Rocket
Lo Gear: Exhaust Velocity - 22,000m/s, Thrust - 52,385,500N
Hi Gear: Exhaust Velocity - 7,840,000m/s, Thrust - 147,000N
MTOW @ 1.0g body: 4023 tonne
MTOW @ 2.0g body: 1967 tonne
Accommodations and stores: 14 people for 380 days. 16 berths (2x in Captain and Chief Engineer's Cabins, 2x in two cabins, 4x in two cabins).
SlipDrive Main: 0.817ly/h average. Also equipped with SlipGate unit
Slipdrive Backup: 0.18ly/h, one time use for 20 lightyear.

That's basically all that's important.
Thoughts, ideas, comments?
The next project is another ship that will be a part of the main story, a spherical ship.

-Ethan
Author:  Thiel [ August 22nd, 2016, 5:13 am ]
Post subject:  Re: Rockets for a Sci-Fi Setting
Hergé called, he wants his rocket back :P
Page 2 of 2 All times are UTC
Powered by phpBB® Forum Software © phpBB Limited
https://www.phpbb.com/