S-IV

The S-IV was the second stage of the Saturn I rocket used by NASA for early flights in the Apollo program.

The S-IV was manufactured by the Douglas Aircraft Company and later modified by them to the S-IVB, a similar but distinct stage used on the Saturn IB and Saturn V rockets.

The S-IV stage was a large LOX/LH2-fueled rocket stage used for the early test flights of the Saturn I rocket. It formed the second stage of the Saturn I and was powered by a cluster of six RL-10A-3 engines. Each one of the engines supplied 66.7 kilonewtons (15,000 lbf) of thrust for a total of about 400 kilonewtons (90,000 lbf). The cryogenic LH2 (liquid hydrogen) and LOX (liquid oxygen) tanks were separated by a common bulkhead. The forward bulkhead of the LOX tank formed the aft bulkhead of the LH2 tank. This saved about ten tons of structural weight.

References

S-IVB

The S-IVB (sometimes S4b, always pronounced "ess four bee") was built by the Douglas Aircraft Company and served as the third stage on the Saturn V and second stage on the Saturn IB. It had one J-2 engine. For lunar missions it was fired twice: first for the orbit insertion after second stage cutoff, and then for translunar injection (TLI).

History

The S-IVB evolved from the upper stage of the Saturn I rocket, the S-IV, and was the first stage of the Saturn V to be designed. The S-IV used a cluster of six engines but used the same fuels as the S-IVB liquid hydrogen and liquid oxygen. It was also originally meant to be the fourth stage of a planned rocket called the C-4, hence the name S-IV.

Eleven companies submitted proposals for being the lead contractor on the stage by the deadline of 29 February 1960. NASA administrator T. Keith Glennan decided on 19 April that Douglas Aircraft Company would be awarded the contract. Convair had come a close second but Glennan did not want to monopolize the liquid hydrogen-fueled rocket market as Convair was already building the Centaur rocket stage.

Samsung Galaxy S4

The Samsung Galaxy S4 is an Android smartphone produced by Samsung Electronics and was first shown publicly on March 14, 2013 at Samsung Mobile Unpacked in New York City. It is the successor to the Galaxy S III which maintains a similar design, but with upgraded hardware and an increased focus on software features that take advantage of its hardware capabilities—such as the ability to detect when a finger is hovered over the screen, and expanded eye tracking functionality. A hardware variant of the S4 became the first smartphone to support the emerging LTE Advanced mobile network standard.

The S4 was made available in late April 2013 on 327 carriers in 155 countries. It became Samsung's fastest selling smartphone, with 20 million sold worldwide in the first two months, and 40 million in the first six months.

Specifications

Hardware

Podcasts:

PLAYLIST TIME:

See Saw

by: Graham Coxon

See saw - up and down - around and round we go
Too late - we're out on the brink
Our love's in the sink - washed up
And when I'm walking down a rainy street
I think I hear you calling out to me
But it's just an echo I've arranged to meet
Free fall - we're out of control -
We never will know what went wrong
Too bad - what we had for a while
Has gone out of style this year
Your friends told me you moved out of town
I got your address and I wrote it down
I used the pen that you bought for my birthday
And every stroke, you know, reminded me of you
I realize that we'll never be together again
Wait a while - reclaim your loss
But it costs alot - you'll learn
Take five - it heals in time
You'll feel just fine - they say
But I feel it
See saw - in a way I'm glad
Though I still feel sad about you
I know it's too late for changing minds
And I'm still not sure I want to change mine
It's just a tiny part that says that this ain't right
See saw - up and down - around and round
They say it heals in time - they say you'll feel just
fine
In a way I'm glad -
Though I still feel sad about losing you




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