Haven1 is a LIFE-SHIP. It is also a Habitube, a gravsat and a hamlet.
At the moment NOBODY has one. (Www.HaveNone.com = www.HavenOne.com)
It is over 100 years since “The Titanic” sank, with not enough lifeboats. it took 90 years to find out why, and perhaps the only early lesson (partially) learnt from that is to carry sufficient lifeboats for people who don't think they need one. And a means of finding and rescuing them, from boats to ships, Reasonably quickly.
The Haven1 habitat is constructed of pressure tube tank sections about 10 metres in diameter and about 6 metres long screwed bolted or clipped into a tube more than 100metres long. Three such tubes are tied in parallel and spun up to 1RPM on a 200metre diameter, creating an effective “Gravity” 1/10 of Earth normal on the two outer habitat tubes. The 4 storied deck capacity of these 2 outer tubes provides housing, farming, working and leisure space for about 100 persons. In a craft of about 3,000 tonnes mass.
This structure could have been built 40 years ago, should have been built 20 years ago, and is not yet under construction. It is not “an hotel” though it can also be used as such. The construction and laboring tasks are mostly achieved by Spidermen
Constructing Haven1 is the SECOND use of these tanks, which were first used as propellant fuel (kerosene and liquid oxygen containment on AscentCraft which are delivered to the construction site at LEO-PORT at a 200Km Equatorial orbit before being moved to a 900Km final parking orbit. Many other options, orbits and travels are possible for LEO-PORT, Haven1 and similar craft.
AscentCraft (www.AscentCraft.com) normally arrive at Leo once per day from a single equatorial stratospheric earth fleet launch point. They are of course rocket craft, and 6 kerosene rocket engines (1 tonne mass, 100 tonne thrust) and (about 400 cubic metres /tonnes) of propellants are contained in each allows this 30 tonne ($10M) craft to achieve orbit without throwing any parts away. The fuel tank (15 tonnes) is most of our payload, but we adapt the 6 tonnes of rocket motors and other hardware, along with the reserve of 3 tonnes propellants (that ensures that even with several failures, the craft can achieve the desired orbit and docking).
Excess fuels are stabilized (burnt) to produce water and CO2, which can be solidified easily for storage and use as mass shielding.
Operation of LEO-PORT and Haven1 is globally international under UnitedSpaceAgency www.UnitedSpaceAgency.com
UnitedSpaceAgency's mission (as an NPO) is to safely open a “doorway” to orbit for all good people.
Who goes should not depend on how much money you can spend …. but we will be able to supply facilities to wealthy or worthwhile tourists as work progresses.
Initially, only spidermen.CO ( www.SpiderMen.Co ) inhabit the workplace. There are typically 3 SpiderMen on each ascent craft.
That can tirelessly do the work of a man or more.
The first human E.T. Crew (12) is selected by UnitedSpaceAgency, and these people may (never) return to Earth.
Such a return is a very expensive trip, particularly in the early days.
Those going to live in space should not be young adventurers who want to climb earth's mountains or otherwise enjoy the risks of living in Earth's high gravity environment. They should have done and “be over” that.
Seniors or elderly would benefit more from low gravity mobility, and live longer. Eventual natural pre-death or death in Haven1's low gravity is expected, and one's body mass is neither returned to Earth or “chucked out of the door” it becomes “processed” to be part of the mass shielding. At least until a burial (if required) is arranged on Deimos (where lots of other mass shielding material is abundant)
The flight of people (and livestock) from Earth to Orbit is done in TheSpa – a water submersion tank with breathing appuratus – that effectively negates high G forces otherwise requiring strength. The craft's initial accelerations are all quite low, but on the “main burn” 3G or more will be attained. This method is far less applicable in descent – we WANT the water, and a passenger's mass is about the same as water – no special suits or “gravity couches” are needed. You can breath (scuba) normally, supported in that water even at considerably higher acceleration gravities
Safe Effectiveness is a lot more important than efficiency, and “weight penalties” for more sturdy construction are worthwhile. The principles of “Triple Use” ( www.TripleUse.com ) are applied to almost everything – articles produced should be reconfigurable to a second and a third use before recycling.
The habitubes we live in were AscentCraft fuel tanks, used perhaps several times for other non-orbital operations, and also perform as radiation shielding in Haven1 / LEO-Port
The rocket engines can be used again, initially as mass shielding, but their high temperature characteristics also allow them to be heat shields in a re-entry Descent craft fabricated in LEO-Port. Other AscentCraft components are also used in new modes as components of Haven1.
End of update 1209-013, Oxford, Pai, TH.
1412-009 Haven1 is a GRAVSAT - an orbital living and Farming environment, in LOW GRAVITY (1/10 of Earths gravity) in its living and working environment, fully pressurised, solar powered and fully shielded from solar flares. and a big zero gravity sports volume
Haven1 is the first 1/10 gravity living environment, where "falling" is no longer deadly, and with a farm next door, good chefs, and there are useful things for you to do. At this stage, 1412-009 - a KeroseneRocket remains the best way to get cargo and passengers to orbit, and we plan for a series of 10 ships that are tanks 8m diameter, 12mm thick walled aluminium tube, It is, I believe, the smallest diameter that a permanent crew and farm can live in PERMANENTLY and where visitors can fit in too.
These 8m diameter 30m long tanks are built and tested on Earth, then filled with kerosene and LOX to about 10m deep each, and are the 2x500t reactant mass, that fuel the insertion into orbit of the tank plus its small pointed payload under a pointed cone, and, underneath, the 49 rocket motors in a 7 x 7 point array. It's an SSTO most of the payload IS the tank and its ascent engines (which will be recycled in orbit) a soyez return capsule would make a good tools chest for the point and that part IS already human rated and would become one of Haven1's lifeboat fleet.
50 tonnes of water or other mass shielding has to be supplied on the sun pointing end of each of the 2 or 3 paralell tubes that rotate around each other, with axis at the sun. ie up to 150 tonnes for all 3 shields, but only one is essential
A small amount of reaction mass timed in the 12 seconds of a revolution both maintains alignment and boosts the orbit or changes the spin rate and/or axis by about 1 degree per day
(normally connected by pressure tubes in tension, cable backed. though at the shadow end of each shielded tube, other tubes may be added axially, and still be fully shielded from the sun
The first and main component launched for the first 10 trips consists of an 8m diameter 12mm thick Duralumin tank, about 30m long. (or high) divided to hold 500 tonnes LOX, 500 tonnes kerosene and general cargo. The expected launch cost is $120m per launch at $3m/tonne
4% of 1000 tonnes is 40 tonnes can be got up. Tank weighs 900kg/m plus ends etc. 30 tonnes? 35 tonnes? 25 tonnes?
for shielding we need 50 tonnes of water., etc, for each of the 1,2 or 3 sunward ends. As our "payload" may be only 5-10 tonnes, plus the 35 tonne tank, it's possible tank #5 (or different) may be dismantled to be part of that shielding.
Up to 5 twin habitube ships can be built from 10 launchings - or just one.
"Gravity" is longitudinal - Spinning around the central axis of the tube wastes a lot of agricultural space, so generally a SECOND mission launched tank (and/or some waste mass on a 200metre tether?) becomes a zero-g pressurised area, with shielding (by Earth's mass) for 40 minutes, and "exposed to solar flares" 50 minutes (daylight side of orbit) until it has enough mass shielding
agricultural station, it is the first to provide GRAVITY in an orbital environment, suitable for humans, livestock and plants. In 50 years of access to space, nobody has "bothered" to provide this, yet it is the first step for survival beyond earth's atmosphere. It is part of the larger plan described in UnitedSpaceAgency.com
The FULL SIZE GRAVSATS are much bigger, multi-decked and more substantial, and requires lunar resources to build both its shield 120m x 50m x 1 tonne/square metre = 6000 tonnes and the aluminium for the 4 disks showm.
Because, at the distance that the Earth and moon are from the sun, the sun occupies 1/2 a degree of arc, and there is a square pyramid shadow from the shield. the disks will either need to be smaller as they get further from the shield, or some intermediate "tip shielding" may be required. the configuration of 4 large disks, as shown may need slight size or shielding adjustment. and their direction and/or speed of spin may vary from the 5RPM of the prototype - that would give about standard earth gravity at the rim, but still have a fairly high corriolis force at 30 degrees per second.
2 = 300 acres of variable gravity space
a slower spin would reduce corriolis , allowing about 15 degrees per second and 1/4 G (2.5 Metres per second, per second) for greater comfort. rather than the "single deck" (plus hub) of the proto, up to 30 decks could give a considerable "acreage" (up to 4 acres per deck) for agriculture, plus a large low gravity hub area in each of the disks. the two 6M diameter (zero gravity) connecting tubes may be fully shielded or used only in planetary shadow. the extra mass for shielding is probably worthwhile though, and a good idea as with 4 or more disks, and hundreds of people on 300 acres of "land", and possibly livestock full shielding is preferred
Construction of gravsat 2 starts with a smaller disk (or contra-rotating pair of disks, better for stability) behind a smaller shield, and when another is built (constructed in shadow but zero gravity at the right) it is bigger, but initially not fully shielded, then the shield is extended, and the new disk mounted behind it - moving very heavy structures in orbit is EASY!.
"Parking" for transit craft or constructions can be had in the shadow to the right. or "teed off" from the connection tubes /"axles" for ease of access. Power generation is from an aluminium parabolic reflector (not shown) on the LHS that concentrates a LOT of solar energy to a focus for THERMAL collection to run a "conventional" steam turbine generator, with cooling finsin the shadow behind it. many megawatts of power are available, without having orbit-hazardous fragile ceramics exposed to space as in P.V. Photo-Voltaic collectors
Gravsat 2 is a stage towards a rural township - holding many skills, spaces and amenities, and a low G (and zero G) environment ideal for paraplegic and elderly people nursing, as well as "the hardy outgoing" types one usually associates with space fiction - though, of course, GETTING to LEO is (at present) not a trip for the feeble, or frail. It will get better though, with the demand (and funding) for it to do so. this will be expanded on a link from UnitedSpaceAgency.com shortly
Lord Oxford 0109-2008