#s-iv

"The second stage, S-IV, is 41 feet 5 inches high and 18 feet 4 inches in diameter. It weighs 13,678 pounds dry and 114,178 pounds loaded. The 100,500 pounds propellant load consists of 16,916 pounds of liquid hydrogen and 83,584 pounds of liquid oxygen.

The stage develops 90,000 pounds thrust from six Pratt & Whitney RL-10A3 engines, rated at 15,000 pounds each. Total burning time is 483 seconds. The oxidizer to fuel ratio is about 5 to 1. The engines, canted six degrees, can swivel four de-grees in a square pattern for control.

To insure proper propellant positioning at separation, the S-IV uses four Thiokol TX 280 ullage rockets which develop 4,800 pounds of thrust each and burn for 3.9 seconds. These ullage rockets are jettisoned after S-IV engine start.

The S-IV structure is an insulated aluminum cylinder closed forward and aft by hemispheric domes and divided by a bulk-head, also a dome, attached near the periphery of the aft dome and roughly parallel to the forward dome. This bulkhead is a fiberglass core bonded between one-eighth inch sheets of alum-inum. The forward tank holds 28,000 gallons of liquid hydrogen and the aft tank holds 8,750 gallons of liquid oxygen.

Both tanks are pressurized with helium gas on the ground and during the boost phase, the hydrogen tank to about 35 psia and the oxygen tank to about 45 psia. After S-IV engine ignition, hydrogen gas is used to pressurize the hydrogen tank."

Oh my god I love them already. I actually have an AU where Lasky is a S-IV...........

Another thing I love about Lasky: he has the respect and loyalty of his crew for cometely different reasons than Del Rio or most other fictional military captains. He doesn't have much in the way of a commanding presence or way of speaking, and he's not a real hard-ass. He's friendly and just. Good.

I also headcanon that he has a particular affinity for Spartans of any variety, because of his encounter with John and Blue Team at such a young age. He saw John in combat AND experienced his humanity firsthand when Chyler died, and he also saw Fred and Kelly (at least) with their helmets off, so he KNOWS they're people. And treats them accordingly.

Looks like S256 took a wrong turn somewhere.

That’s what she gets for always striking out on her own. 

This was a study initiated in 1962 for space stations designs using the Gemini Spacecraft and later on the Apollo CSM. Boeing and Douglas received Phase I contracts in June 1964.

MORL/S-IVB Concept

"A 5 metric ton 'dry' space station, launched by Saturn IB, with Gemini or Apollo being used for crew rotation. The 6.5 meter diameter and 12.6 meter long station included a docking adapter, hangar section, airlock, and a dual-place centrifuge. Douglas was selected by NASA LaRC for further Phase 2 and 3 studies in 1963 to 1966. Although MORL was NASA's 'baseline station' during this period, it was dropped by the late 1960's in preference to the more capable station that would become Skylab.

Different docking concepts studied.

The Manned Orbital Research Laboratory was the brainchild of Carl M Houson and Allen C. Gilbert, two engineers at Douglas. In 1963 they proposed a Mini Space Station using existing hardware, to be launched by 1965. A Titan II or Atlas would be launched with a payload of control system, docking adapter and hangar module. The visiting crew would use the payload to transform the empty fuel tank of the last stage of the rocket into pressurized habitat (a so-called 'wet' space station). Provisions were available for 4 astronauts for a 100 day stay. Crew members would arrive two at a time aboard Gemini spacecraft. Equipment included a two-place centrifuge for the astronauts to readapt to gravity before their return to earth.

An early MORL concert. Artwork by Gordon Phillips.

In June 1964 Boeing and Douglas received Phase I contracts for further refinement of MORL station designs. The recommended concept was now for a 13.5 metric ton 'dry' space station, launched by Saturn IB, with Gemini or Apollo being used for crew rotation. The 6.5 meter diameter and 12.6 meter long station included a docking adapter, Hangar section, airlock, and a dual-place centrifuge.

"Medium-sized orbiting lab is this Manned Orbital Research Laboratory (MORL) developed for NASA's Langley Lab by Douglas Missiles & Spacecraft Division. The lab which weighs about 35,000 pounds, could maintain 3 to 6 men in orbit for a year.

Orbiting Stations: Stopovers to Space Travel by Irwin Stambler, G.P. Putnam's Sons, 1965."

Douglas was selected by NASA LaRC for further Phase 2 and 3 studies in 1963 to 1966. The major system elements of the baseline that emerged included:

A 660-cm-diameter laboratory launched by the Saturn IB into a 370-km orbit inclined at 28.72 degrees to the equator

A Saturn IB launched Apollo logistics vehicle, consisting of a modified Apollo command module, a service pack for rendezvous and re-entry propulsion, and a multi-mission module for cargo, experiments, laboratory facility modification, or a spacecraft excursion propulsion system.

Supporting ground systems.

MORL Phase IIb examined the utilization of the MORL for space research in the 1970s. Subcontractors included:

Eclipse-Pioneer Division of Bendix, stabilization and control

Federal Systems Division of IBM, communications, data management, and ground support systems

Hamilton Standard Division of the United Aircraft Corporation, environmental control/life support

Stanford Research Institute, priority analysis of space- related objectives

Bissett-Berman, oceanography

Marine Advisors, oceanography

Aero Services, cartography and photogrammetry

Marquardt, orientation propulsion

TRW, main engine propulsion.

The original MORL program envisioned one or two Saturn IB and three Titan II launches. Crew would be 6 to 9 Astronauts. After each Gemini docked to the MORL at the nose of the adapter, the crew would shut down the Gemini systems, put the spacecraft into hibernation, and transfer by EVA to the MORL airlock. The Gemini would then be moved by a small manipulator to side of the station to clear docking adapter for arrival of the next crew."

"Docking was to have 3 ports, all Nose Dock config, with spacecraft modifications totaling +405 lbs over the baseline Gemini spacecraft (structure beef-up, dock provisions, added retro-rockets, batteries, a data link for rendezvous, temp. control equip. for long-term, unoccupied Gemini storage on-orbit and removal of R&D instruments)."

"Later concepts including docking a Saturn-IB launched space telescope to MORL. At 4 meter diameter and 15 meter long, this would be the same size as the later Hubble Space Telescope. The crew would have to make EVA's to recover the film from the camera.

In 1965 Robert Sohn, head of the Technical Requirements Staff, TRW Space Technology Laboratories, proposed a detailed plan for early manned flight to Mars using MORL. The enlarged MORL-derived mission module would house six to eight men and be hurled on a Mars flyby by a single Saturn MLV-V-1 launch. MORL-derived Mars mission modules cropped up in other Douglas Mars studies until superseded by the 10-m diameter Planetary Mission Module in 1969.

MORL/Space Telescope

Why was MORL never launched ?

NASA had a need for a Space Station and MORL was little, easy and cheap. But NASA had more ambitious plans, embodied in the Apollo Applications Orbital Workshop (later called Skylab)."

-information from astronautix.com: link

source, source, source

NARA: 6375661, S66-17592

"The S-IV-9, the second stage of SA-9 Saturn I Block II, is loaded into a cargo transport aircraft at Mather Air Force Base, California. The second stage was manufactured by Douglas in Seal Beach, California."

Date: October 1964