22 million horsepower

[FENZO]

That test was for the Ares version of the SRB, 5 segments. DM-3, if I remember correctly.

Some fascinating facts from an ATK-Thiokol pitch from 2004 about the Shuttle's Reusable Solid Rocket Motors (RSRMs):
Horsepower generated by RSRM: 48,269,283
Megawatts generated by RSRM: 35,994
Hoover dam peak power capability in megawatts: 2,000
Number of homes powered by an RSSRM: 11,998,000
20,000 gallon swimming pools vaporized per motor: 23
Contains 1,106,000 lbs of solid propellant
Total weight prior to launch is 1,255,000 lbs
Burns 123 seconds
Separates from Shuttle vehicle at 150,000 ft at a velocity of 4,500 ft/sec
Splashes down in the Atlantic 122 nautical miles down range

It's unusual to see a conversion to HP since the ballistic requirement for the solid motor performance in the CEI spec is a vacuum thrust profile. Let's just hope some young enthusiast isn't going around repeating that since the motor did not move it did not generate power (horse or otherwise). :frown

 

[Wwabbit]

That test was for the Ares version of the SRB, 5 segments. DM-3, if I remember correctly.

Some fascinating facts from an ATK-Thiokol pitch from 2004 about the Shuttle's Reusable Solid Rocket Motors (RSRMs):
Horsepower generated by RSRM: 48,269,283
Megawatts generated by RSRM: 35,994
Hoover dam peak power capability in megawatts: 2,000
Number of homes powered by an RSSRM: 11,998,000
20,000 gallon swimming pools vaporized per motor: 23
Contains 1,106,000 lbs of solid propellant
Total weight prior to launch is 1,255,000 lbs
Burns 123 seconds
Separates from Shuttle vehicle at 150,000 ft at a velocity of 4,500 ft/sec
Splashes down in the Atlantic 122 nautical miles down range

It's unusual to see a conversion to HP since the ballistic requirement for the solid motor performance in the CEI spec is a vacuum thrust profile. Let's just hope some young enthusiast isn't going around repeating that since the motor did not move it did not generate power (horse or otherwise). :frown

So you don't think the engine stand flexed at all? Not even a micro millimeter's worth? The fixture would have been engineered to a given stiffness factor, so even the teeniest flex would result in work having been done.

 

[Thugboat]

Wow,

This thread makes me feel really "DUMB" Good thing I still have my looks! hahahahaha

Thugboat

Question; Why would I read every word of this thread while not understanding any of it?

 

[FENZO]

So you don't think the engine stand flexed at all? Not even a micro millimeter's worth? The fixture would have been engineered to a given stiffness factor, so even the teeniest flex would result in work having been done.

Whether or not the motor moved is irrelevant to the power it produced. The motor produces the same power affixed to the earth, orbiter, moon... etc. Power is the rate at which energy is transferred, period. Force x velocity is just one way to determine the quantity of energy transfer. That mechanical method is a subset, it does not indicate that if there is no velocity (no distance travelled) that there is no energy transfer and therefore no work or power.

 

[Wwabbit]

it does not indicate that if there is no velocity (no distance travelled) that there is no energy transfer and therefore no work or power.

Yes, of course, energy can be exchanged and power produced with no work performed. The sun converts tremendous amounts of energy resulting in lots of power but does little actual work (other than propel photons and other particles at us). The energy exchange within the rocket motor and the force of its resulting thrust was absorbed by the test stand and then the earth. If the test stand moved or flexed at all within the limits of its designed load bearing capacity then some work was done, (now that's a pissy little argument mainly because the work was not productive - BUT because it was a huge force acting on a huge resistance, even a little movement could be a measurable amount of work). An example would be the space shuttle solid rocket booster system. You likely know this; the development engineers accounted for a 'twang' at launch which was the bending moment of the booster body immediately post ignition as the force of momentum moved vertically along the booster shell during acceleration. The work done in this phase was accounted for as fatigue stress by virtue of the working loads. Are we slicing this thing fine enough yet??

 

[AJB]

We saw this test site and at least one test during the SaltLake City Rally if I recall.
ajb

 

[FENZO]

Yes, of course, energy can be exchanged and power produced with no work performed. The sun converts tremendous amounts of energy resulting in lots of power but does little actual work (other than propel photons and other particles at us). The energy exchange within the rocket motor and the force of its resulting thrust was absorbed by the test stand and then the earth. If the test stand moved or flexed at all within the limits of its designed load bearing capacity then some work was done, (now that's a pissy little argument mainly because the work was not productive - BUT because it was a huge force acting on a huge resistance, even a little movement could be a measurable amount of work). An example would be the space shuttle solid rocket booster system. You likely know this; the development engineers accounted for a 'twang' at launch which was the bending moment of the booster body immediately post ignition as the force of momentum moved vertically along the booster shell during acceleration. The work done in this phase was accounted for as fatigue stress by virtue of the working loads. Are we slicing this thing fine enough yet??

I'm just trying to point out as delicately and non-technically as I can that the statements about work and power being null because it did not move are completely false and nonsensical.... violates the 1st law of thermodynamics. The motor does not know what it is connected to, and the physics don't care.. the power and work would always be the same with the same motor. In this case the work is done on the surroundings. It's like stating a GT has zero horsepower on a dyno because it does not move.

 

[Sinovac]

Have you guys found all the fly crap in the pepper? :lol

 

[soroush]

No work being done? did you guys check your watches? there was only 23 hours in that day! :rofl

 

[RALPHIE]

One of the 2 Remaining Saturn V Launch Vehicles

Click on any of the following links and walk around a bit - use arrow keys and Page UP/Page Down

1st Stage: S-1C, 5 F1 engines, 7,600,000 lbs of thrust (34 meganewtons) - Originally 7,500,000 but uprated on Apollo 15

http://maps.google.com/maps?q=Satur...id=gwy466tKPN9VzV2weGdOQQ&cbp=12,273.1,,0,-25

2nd Stage: S-II, 5 J2 Engines, 1,100,000 lbs of thrust (5.1 meganewtons)

http://maps.google.com/maps?q=Satur...d=3lezT4jIcfjnvu4T1_8SUQ&cbp=12,293.03,,0,-55

3rd Stage: S-IVB, 1 J2 Engine, 220,000 lbs of thrust (1.02 meganewtons)

http://maps.google.com/maps?q=Satur...kKG60OajpJ4sizUr3Zw&cbp=12,278.03,,0,-25&z=20

 

[Sinovac]

That is a great display Ralphie. I saw the last nighttime shuttle launch there. They had on display a C3 'Vette owned by one of the astronauts back in the day.