Solid Rocket Booster Promontory UT 11-01

[djinstructor]

Our exploration of space will now come to a virtual standstill until someone invents a new technique for getting into orbit!

[maverick18765378]

I was about 1.5 miles. I forgot the exact calculations but my wife who works there would know. I am fairly certain I wasnt 13 miles however :). I figure it was a 8-9 second sound delay from ignition to when the sound reached us. My favorite is the gal in the truck @ 13 seconds

[Unabomber2]

13.7 miles????? LOL you're crazy!

[ChuckyYeager]

The person filming was standing 8 x 343m/s = 2744 metres away or 1,715 miles ;)

[cory8791]

how do they hold it down ?

[babiker2468]

I was bored so i thought i would share this:

Air temperature in Promontory, UT on Thursday, September 10, 2009 during this test was 73F. At this air temperature sound travels at 1131.95 feet/sec it takes 8 seconds from 0:06 to 0:14 to hear the sound of the rocket. The person filming was standing 8 x 1131.95 = 72444.8 feet away or 13.7206 miles.

[cory8791]

nice

[jarwz]

How fast is the space shuttle travelling by the time the bottom of it has left the launch pad?

[Whitburnbear]

@jarwz

120mph

[AtlantisB737]

@babiker2468 it doesn´t look like 13 miles AT ALL buddy....that´s the length of a small town...I am sure those 8 seconds this guy mentions must have been 2 or 3, that´s where the mistake is...your calcs seem right. C=661.5 kts at sea level (59ºF)

[babiker2468]

@AtlantisB737 I dont know what makes the sound delay for about 8 seconds but if you get the sound delay and plug in the calculation were 8 seconds you should get the correct answer

[helicoastie]

Don't be a douche... you people and your stupid theories...

[SuperPipebomb]

what do they use to hold that back?

[markiloth92]

they have a huge concrete slab that extends far into ground to stop the booster taking off.

[malcolmyoungrocks]

how much thrust does that produce? and how loud is it from that distance?

[alanmac106]

I believe it's around 44 million horse power. Pounds of thrust - not too sure. You can bet it's a lot!

[HaloNoobAlert]

sweet - now all i need is 88 million horses to gallop me into space :D

[maverick18765378]

Its pretty loud although I dont know a specific db level. If you notice from the video the vertical streaks of light, its also pretty bright and somewhat difficult to stare at from where we were. From the sound delay we were a little over a mile away

[HNDNV07]

@malcolmyoungrocks Each SRB has a combined thrust of approximately 2,800,000 lbs at liftoff and 3,100,000 after liftoff. I believe it's 180 Dbs. I heard it on an episode of NASA Edge.

[Kellnersfireworks]

I wonder if that would be hot enough to feel it 500 yards away....?

[SoaringEagle2005]

They say you can feel the heat from the launch over 10 miles away.

[almostlasse123]

*cough cough*

kinda dusty over here

[Parubhi]

Man that is awesome! I wonder if the any of the dirt/sand/rocks in the immediate vicinity of the rocket exhaust turned into silica.

[RocketScienceBooks]

In general, they will. Depends upon the site, what's available to the exhaust. Very few rocket engines ever burn this long in contact with earth, nor were the designed to do so. This is IIRC, the 2nd largest solid engine ever built (in terms of thrust, and total impulse -- measured in pound/seconds, rather similar to MPG with your car). Folks here very fortunate to see such an incredible invention up close and personal, face to face, as here. This is IIRC the Alliant-ne-Thiokol factory.

[maverick18765378]

There is. My wife has some from another test. Its in clumps of green glass, pretty cool

[thedoorsbiggestfan]

I farted

[jingels72]

Wow! Dirt.

[diadora16]

Hey, I guess they're right. Utah, although boring and desolate, can still serve a purpose. Don't you go dyin on me!!

[tjl7321]

Hahaha.

[MrFireAss]

LOL! nice.