how much electricity would be needed to produce a thrust of 253,000 lbs?
Q. i am asking this question in relation to an airplane (in this case Boeing 747-400). We are trying to find a way for B 747-400 to run on electricity rather than jet fuel) Sorry I forgot to mention that electricity to run a motor, not an engine.
Asked by ishan - Mon Jul 27 23:57:23 2009 - - 5 Answers - 2 Comments
A. I am sorry to have to tell you that what you are proposing is not possible. Existing technology does not allow the storage of electricity in a light weight and efficient form that would power an airplane. It's been done in a couple of very small experimental airplanes, but not for a practical transportation machine. The basic conversion rate is about 1.5 HP per pound of thrust. That is a very theoretical number, but it's better than no number at all. So at 38,000 feet at Mach .85, you would need about 380,000 HP. That will require 285 Megawatts, or about the amount consumed by a city the size of Austin Texas or Canterbury UK. So you see there is a tremendous amount of power in jet fuel. The batteries required to run that airplane… [cont.]
Answered by aviophage - Tue Jul 28 00:50:34 2009
Q. i am asking this question in relation to an airplane (in this case Boeing 747-400). We are trying to find a way for B 747-400 to run on electricity rather than jet fuel) Sorry I forgot to mention that electricity to run a motor, not an engine.
Asked by ishan - Mon Jul 27 23:57:23 2009 - - 5 Answers - 2 Comments
A. I am sorry to have to tell you that what you are proposing is not possible. Existing technology does not allow the storage of electricity in a light weight and efficient form that would power an airplane. It's been done in a couple of very small experimental airplanes, but not for a practical transportation machine. The basic conversion rate is about 1.5 HP per pound of thrust. That is a very theoretical number, but it's better than no number at all. So at 38,000 feet at Mach .85, you would need about 380,000 HP. That will require 285 Megawatts, or about the amount consumed by a city the size of Austin Texas or Canterbury UK. So you see there is a tremendous amount of power in jet fuel. The batteries required to run that airplane… [cont.]
Answered by aviophage - Tue Jul 28 00:50:34 2009
anyone know if it's possible to get 60 lbs thrust out of an electric turbofan engine 1' long and 6'' wide?
Q. i also need the engine to weigh under 40 lbs
Asked by Jon H - Mon May 5 12:50:33 2008 - - 1 Answers - 0 Comments
Q. i also need the engine to weigh under 40 lbs
Asked by Jon H - Mon May 5 12:50:33 2008 - - 1 Answers - 0 Comments
how many pouns(lbs.) does a A320 give out when reverse thrust? (with a IAE V2500 engine)?
Q. how many pouns(lbs.) does a A320 give out when reverse thrust? (with a IAE V2500 engine)?
Asked by sin03 - Fri Mar 7 05:55:06 2008 - - 2 Answers - 0 Comments
A. max reverse thrust usually represent 30-45% of engine's total thrust.
Answered by David S - Fri Mar 7 08:57:27 2008
Q. how many pouns(lbs.) does a A320 give out when reverse thrust? (with a IAE V2500 engine)?
Asked by sin03 - Fri Mar 7 05:55:06 2008 - - 2 Answers - 0 Comments
A. max reverse thrust usually represent 30-45% of engine's total thrust.
Answered by David S - Fri Mar 7 08:57:27 2008
I plan to mount a 34 lbs thrust electric trolling motor on my 15'6" long, 37" beam canoe?
Q. and I wonder if this is enough power? My friend has a 17'5" long, 38" beam canoe with a Minn Kota Endura 50. I have to say, this canoe moves fast, even set to 4 (out of 5) it is no problem covering what is known to be a mile, in about 15 minutes (4mph). I plan on using an Endura 34. Do you think I will be able to cruise anywhere near 4 mph? Even going against the wind or current, my friend can make 4 mph if he sets it to 5. Seems 4 mph is the maximum speed of the hull, maybe 4.5 mph. Thanks.
Asked by upwardly_mobile_home - Tue Nov 17 20:21:33 2009 - - 1 Answers - 0 Comments
Q. and I wonder if this is enough power? My friend has a 17'5" long, 38" beam canoe with a Minn Kota Endura 50. I have to say, this canoe moves fast, even set to 4 (out of 5) it is no problem covering what is known to be a mile, in about 15 minutes (4mph). I plan on using an Endura 34. Do you think I will be able to cruise anywhere near 4 mph? Even going against the wind or current, my friend can make 4 mph if he sets it to 5. Seems 4 mph is the maximum speed of the hull, maybe 4.5 mph. Thanks.
Asked by upwardly_mobile_home - Tue Nov 17 20:21:33 2009 - - 1 Answers - 0 Comments
looking for compact turbofan engine for homebuilt plane, w/ thrust between 150 & 300 lbs, any suggestion ??
Q. looking for compact turbofan engine for homebuilt plane, w/ thrust between 150 & 300 lbs, any suggestion ??
Asked by Si Valley - Sun Jul 23 03:05:02 2006 - - 3 Answers - 0 Comments
A. Can't think of any turbo-fan...but in turbo-jet there is the Solar Turbine..originally used as an APU source. There are also several aircraft APU's that are in that catagory. I have heard of a homebuilder who used a Allison C-18 (normally powering the 'A' model Jetaranger helicopter) in pure thrust mode. There is also the french TRS-114 originally used on the BD-5J. Also Williams made a small turbojet WR24-6 with 115lbs thrust Noel Penny 100 series as well...180 lbs thrust Hope this helps! With respect to DogZ ...yes.they do burn thru a heap of fuel. But it isn't always as it appears. For instance...a Allison C-18 will burn about 21-22 US gal/hr and output about 317 Shp. However unlike a recip of the same power, the turbine will… [cont.]
Answered by helipilot212 - Sun Jul 23 03:48:58 2006
Q. looking for compact turbofan engine for homebuilt plane, w/ thrust between 150 & 300 lbs, any suggestion ??
Asked by Si Valley - Sun Jul 23 03:05:02 2006 - - 3 Answers - 0 Comments
A. Can't think of any turbo-fan...but in turbo-jet there is the Solar Turbine..originally used as an APU source. There are also several aircraft APU's that are in that catagory. I have heard of a homebuilder who used a Allison C-18 (normally powering the 'A' model Jetaranger helicopter) in pure thrust mode. There is also the french TRS-114 originally used on the BD-5J. Also Williams made a small turbojet WR24-6 with 115lbs thrust Noel Penny 100 series as well...180 lbs thrust Hope this helps! With respect to DogZ ...yes.they do burn thru a heap of fuel. But it isn't always as it appears. For instance...a Allison C-18 will burn about 21-22 US gal/hr and output about 317 Shp. However unlike a recip of the same power, the turbine will… [cont.]
Answered by helipilot212 - Sun Jul 23 03:48:58 2006
how to calculate acceleration of my rocket?
Q. If i know the weight of my rocket, 5 lbs, and i know that it produces 8.3 lbs of thrust, how can i calculate the acceleration of my rocket? am i missing any needed info? also, if i figure out my acceleration, how do i rule in gravity, assuming no air resistance exists.
Asked by gocougars1992 - Wed Oct 1 00:40:59 2008 - - 1 Answers - 0 Comments
A. Assuming straight up! " j " g = 32 ft/s^2 -j Net force = thrust - weight of rocket Net force = F = 8.3 - 5 = 3.3 j pounds m = w/g = 5 /32 slug F = m * a a = F / m = 3.3 / (5/32) = 21.12 j ft/s^2 "vector" Note: The rocket's mass and weight will decrease as it's fuel is exhausted. In more formal terms: net force = m(dv/dt) = vr(dm/dt) - mg where vr(dm/dt) equals the upward thrust on the rocket
Answered by unknown - Wed Oct 1 01:03:35 2008
Q. If i know the weight of my rocket, 5 lbs, and i know that it produces 8.3 lbs of thrust, how can i calculate the acceleration of my rocket? am i missing any needed info? also, if i figure out my acceleration, how do i rule in gravity, assuming no air resistance exists.
Asked by gocougars1992 - Wed Oct 1 00:40:59 2008 - - 1 Answers - 0 Comments
A. Assuming straight up! " j " g = 32 ft/s^2 -j Net force = thrust - weight of rocket Net force = F = 8.3 - 5 = 3.3 j pounds m = w/g = 5 /32 slug F = m * a a = F / m = 3.3 / (5/32) = 21.12 j ft/s^2 "vector" Note: The rocket's mass and weight will decrease as it's fuel is exhausted. In more formal terms: net force = m(dv/dt) = vr(dm/dt) - mg where vr(dm/dt) equals the upward thrust on the rocket
Answered by unknown - Wed Oct 1 01:03:35 2008
What are the best exercises to do to get more stamina during sex?
Q. I am not talking about ejaculation here people - I just get tired thrusting and being on top, especially if I'm expected to get my 180 lbs fully off my lady. I'm in typical computer geek shape, so no exercise beyond long walks at the moment, and this is my only real motivation to exercise further than that, really. I'm 24 and have no health problems other than being out of shape.
Asked by pliong2000 - Wed Jul 30 23:17:38 2008 - - 8 Answers - 0 Comments
A. you have to have good vascular health which equals better blood flowing through it
Answered by crazysk8tr15 - Wed Jul 30 23:23:35 2008
Q. I am not talking about ejaculation here people - I just get tired thrusting and being on top, especially if I'm expected to get my 180 lbs fully off my lady. I'm in typical computer geek shape, so no exercise beyond long walks at the moment, and this is my only real motivation to exercise further than that, really. I'm 24 and have no health problems other than being out of shape.
Asked by pliong2000 - Wed Jul 30 23:17:38 2008 - - 8 Answers - 0 Comments
A. you have to have good vascular health which equals better blood flowing through it
Answered by crazysk8tr15 - Wed Jul 30 23:23:35 2008
torque/horsepower help must figure out thrust?
Q. First, if i have an engine with 6.5 horsepower at 3600 rpm, the torque is measured from the outside of the crankshaft of diameter 3/4", right? so if i put a sprocket on to drive a chain i have to divide my torque of 9.48 ft-lbs by the ratio between 3/4 and the diameter of the sprocket? does this affect horsepower AND torque or does the hp stay the same due to the increased linear speed? Also, if i am supplying a certain amount of torque and hp to the rear drive sprocket, how do i figure out how much "thrust" i am supplying to the ground, say if its 40 ft-lbs on the sprocket and the wheel is 2 times bigger, do i divide 40 ft-lbs by 2 and get 40 pounds force, or what? Ive been trying to figure this out for awhile so the more detailed the… [cont.]
Asked by Jesse C - Sun Nov 18 02:38:04 2007 - - 1 Answers - 0 Comments
A. Well, I'll start with the easiest part: "does the hp stay the same due to the increased linear speed?" Yes it does. "the torque is measured from the outside of the crankshaft of diameter 3/4", right?" No, not really, if your torque is 9,48ft-lbs, it is being measured (in effect) at a 1ft radius, not a 3/8" radius. At the 3/8" radius the force would 303.36lbs Therefor the answer to: "so if i put a sprocket on to drive a chain i have to divide my torque of 9.48 ft-lbs by the ratio between 3/4 and the diameter of the sprocket?" is No, but if you want to know the force tangent to the sprocket, you'd multiply the 9.48lbs at 1ft radius by 1/(radius of sprocket in feet), "say if its 40 ft-lbs on the sprocket and the wheel is 2 times bigger, [cont.]
Answered by tinkertailorcandlestickmaker - Sun Nov 18 04:10:42 2007
Q. First, if i have an engine with 6.5 horsepower at 3600 rpm, the torque is measured from the outside of the crankshaft of diameter 3/4", right? so if i put a sprocket on to drive a chain i have to divide my torque of 9.48 ft-lbs by the ratio between 3/4 and the diameter of the sprocket? does this affect horsepower AND torque or does the hp stay the same due to the increased linear speed? Also, if i am supplying a certain amount of torque and hp to the rear drive sprocket, how do i figure out how much "thrust" i am supplying to the ground, say if its 40 ft-lbs on the sprocket and the wheel is 2 times bigger, do i divide 40 ft-lbs by 2 and get 40 pounds force, or what? Ive been trying to figure this out for awhile so the more detailed the… [cont.]
Asked by Jesse C - Sun Nov 18 02:38:04 2007 - - 1 Answers - 0 Comments
A. Well, I'll start with the easiest part: "does the hp stay the same due to the increased linear speed?" Yes it does. "the torque is measured from the outside of the crankshaft of diameter 3/4", right?" No, not really, if your torque is 9,48ft-lbs, it is being measured (in effect) at a 1ft radius, not a 3/8" radius. At the 3/8" radius the force would 303.36lbs Therefor the answer to: "so if i put a sprocket on to drive a chain i have to divide my torque of 9.48 ft-lbs by the ratio between 3/4 and the diameter of the sprocket?" is No, but if you want to know the force tangent to the sprocket, you'd multiply the 9.48lbs at 1ft radius by 1/(radius of sprocket in feet), "say if its 40 ft-lbs on the sprocket and the wheel is 2 times bigger, [cont.]
Answered by tinkertailorcandlestickmaker - Sun Nov 18 04:10:42 2007
Trolling motor battery ?
Q. i have a 24 lbs thrust minn kota model 35. i got it at a garage sale with no box. i've hooked it up to our tractor so i know it works, but i don't know what amperage or type of battery i should buy for it.
Asked by Greyhound95 - Sat Jun 30 13:25:03 2007 - - 6 Answers - 0 Comments
A. Just get a deep cycle battery for marine use.
Answered by Fordman - Sat Jun 30 13:28:48 2007
Q. i have a 24 lbs thrust minn kota model 35. i got it at a garage sale with no box. i've hooked it up to our tractor so i know it works, but i don't know what amperage or type of battery i should buy for it.
Asked by Greyhound95 - Sat Jun 30 13:25:03 2007 - - 6 Answers - 0 Comments
A. Just get a deep cycle battery for marine use.
Answered by Fordman - Sat Jun 30 13:28:48 2007
2 lbs a week is a sensible goal, if you ask me. So I need some tips and opinions, please?
Q. Ok, I wanna try to lose 2 lbs a week, I think that' reasonable. I'm a 16 year old girl, I'm 5'2" and I want to be 110 lbs instead, which is a healthy weight for my size, considering that I have a very small frame. Now, I do alot of weight lifting and DDR, so I have quite a bit of muscle in my arms and legs, which might be part of why my weight is such a large number, but I still want to lose about 15 lbs. So, I'm going to eat 1200 calories daily because any less then you won't lose weight. Also, this is what I usually do for a work out: 60 jumping jacks 30 push-ups 30 - 45 crunches 60 seconds of butt-kicks 30 lunges 30 hip thrusts 60 seconds of punching 30 squats 30 bicycle crunches And then repeat all of those again. That works… [cont.]
Asked by Mama, we all go to hell - Mon Nov 9 20:18:17 2009 - - 2 Answers - 0 Comments
A. Exercise..make a chart and run around your house everyday in it or on the outside while drinking water... --- -replace coke with water or juice -replace junk food with fruits and veggies -use fresh instead of frozen or canned -eat 1800-2000 calories a day or LESS -try to get some of your friends to help -its hard doing it on your own -exercise by doing something fun like dancing or taking a bike ride -during tv commercials, do 10 jumping jacks..just 10 each break and you can loose alot! -DIETS will not help you loose weight..they will just maintain the weight..they are half of the "Loose Weight Plan" You have to exercise for the other half..so every time you eat..wait 30 minutes then run or exercise! -make sure you stick to this plan… [cont.]
Answered by P3@CE - Mon Nov 9 20:27:30 2009
Q. Ok, I wanna try to lose 2 lbs a week, I think that' reasonable. I'm a 16 year old girl, I'm 5'2" and I want to be 110 lbs instead, which is a healthy weight for my size, considering that I have a very small frame. Now, I do alot of weight lifting and DDR, so I have quite a bit of muscle in my arms and legs, which might be part of why my weight is such a large number, but I still want to lose about 15 lbs. So, I'm going to eat 1200 calories daily because any less then you won't lose weight. Also, this is what I usually do for a work out: 60 jumping jacks 30 push-ups 30 - 45 crunches 60 seconds of butt-kicks 30 lunges 30 hip thrusts 60 seconds of punching 30 squats 30 bicycle crunches And then repeat all of those again. That works… [cont.]
Asked by Mama, we all go to hell - Mon Nov 9 20:18:17 2009 - - 2 Answers - 0 Comments
A. Exercise..make a chart and run around your house everyday in it or on the outside while drinking water... --- -replace coke with water or juice -replace junk food with fruits and veggies -use fresh instead of frozen or canned -eat 1800-2000 calories a day or LESS -try to get some of your friends to help -its hard doing it on your own -exercise by doing something fun like dancing or taking a bike ride -during tv commercials, do 10 jumping jacks..just 10 each break and you can loose alot! -DIETS will not help you loose weight..they will just maintain the weight..they are half of the "Loose Weight Plan" You have to exercise for the other half..so every time you eat..wait 30 minutes then run or exercise! -make sure you stick to this plan… [cont.]
Answered by P3@CE - Mon Nov 9 20:27:30 2009
minnn kota endura transom mount set up?
Q. I just bough a minn kota endura 50 lbs. thrust trolling motor, I have a 19 ft. four winns i/o 170 hp fiber glass open bow boat, there is not too much room to install a trolling motor without removing the chrome rails from bow...I have n't installed my new trolling motor and my question is, will I have any problems by rotating the controll lever on this particular model 180 degrees and home make a mounting bracket so I can steer the trolling motor from my open bow while is pushing forward?... will it work this way ? , I'm aware that this minn kota trolling motor was design to be a transon mount...any tips and answers are highly apreciated
Asked by hector596 - Sun Mar 2 23:06:30 2008 - - 2 Answers - 0 Comments
A. The motor doesn't care where it's mounted. If you can mount it so it reaches the water go ahead. Being electric it can run in either direction.
Answered by tronary - Sun Mar 2 23:21:14 2008
Q. I just bough a minn kota endura 50 lbs. thrust trolling motor, I have a 19 ft. four winns i/o 170 hp fiber glass open bow boat, there is not too much room to install a trolling motor without removing the chrome rails from bow...I have n't installed my new trolling motor and my question is, will I have any problems by rotating the controll lever on this particular model 180 degrees and home make a mounting bracket so I can steer the trolling motor from my open bow while is pushing forward?... will it work this way ? , I'm aware that this minn kota trolling motor was design to be a transon mount...any tips and answers are highly apreciated
Asked by hector596 - Sun Mar 2 23:06:30 2008 - - 2 Answers - 0 Comments
A. The motor doesn't care where it's mounted. If you can mount it so it reaches the water go ahead. Being electric it can run in either direction.
Answered by tronary - Sun Mar 2 23:21:14 2008
Deep Cycle Marine Battery Question?
Q. I need a battery for a new 2008 Motorguide trolling motor. I have no idea what to look for. Do you mind naming some brands or tell me what I need to look for. It is a 72 lbs of thrust and i want to know what would the appropriate size battery. Thanks
Asked by JamO.G - Thu Apr 23 10:53:13 2009 - - 6 Answers - 0 Comments
A. Die hard deep cycle battery,your manual,or the dealer will tell how big but with 72 lbs thrust you will need a big one. You should get two one for backup. I don't know about how new designs on deep cycle battery work but old design if you didn't almost drain the battery of charge it would get what's called a memory and only recharge to that point you starting charging from
Answered by Larry m - Thu Apr 23 11:42:18 2009
Q. I need a battery for a new 2008 Motorguide trolling motor. I have no idea what to look for. Do you mind naming some brands or tell me what I need to look for. It is a 72 lbs of thrust and i want to know what would the appropriate size battery. Thanks
Asked by JamO.G - Thu Apr 23 10:53:13 2009 - - 6 Answers - 0 Comments
A. Die hard deep cycle battery,your manual,or the dealer will tell how big but with 72 lbs thrust you will need a big one. You should get two one for backup. I don't know about how new designs on deep cycle battery work but old design if you didn't almost drain the battery of charge it would get what's called a memory and only recharge to that point you starting charging from
Answered by Larry m - Thu Apr 23 11:42:18 2009
Small motor for Sea Eagle 9 inflatable raft?
Q. I bought this last year. The maximum weight of the motor can be 45 lbs. The maximum hp can be 4 or if it is electric, 74 lbs of thrust. These are my choices, which would you choose and why?
Asked by never_vote_democrat - Tue Mar 27 20:51:46 2007 - - 5 Answers - 0 Comments
A. I like mercury outboards my self
Answered by roderickgoddard - Wed Mar 28 01:42:17 2007
Q. I bought this last year. The maximum weight of the motor can be 45 lbs. The maximum hp can be 4 or if it is electric, 74 lbs of thrust. These are my choices, which would you choose and why?
Asked by never_vote_democrat - Tue Mar 27 20:51:46 2007 - - 5 Answers - 0 Comments
A. I like mercury outboards my self
Answered by roderickgoddard - Wed Mar 28 01:42:17 2007
jet engine terms?
Q. what does it mean when it says the jet engine gets lets say 17 lb thrust at whatever rpm's. does that mean it can only lift 17 lbs? so if i wanted to lift something weighing 50 lbs into the air i would need 3 jet engines? thanks
Asked by James M - Sat May 17 10:20:19 2008 - - 4 Answers - 1 Comments
A. Theoretically yes. If you point an airplane straight up and it has more thrust than it weighs it will climb. Called thrust/weight ratio. A Harrier hovering is producing exactly the same thrust in lbs. as the aircraft weight. And no, lift is not 100% generated by the wings. If that were true, how does an airplane fly on knife edge? And folks, a saturn V rocket has many pounds of thrust and no wings. Hmmm. Were talking engine power here folks, not aerodynamics. He wants to know if thrust can lift things. You bet it can. No wings required.
Answered by John B - Sat May 17 12:56:55 2008
Q. what does it mean when it says the jet engine gets lets say 17 lb thrust at whatever rpm's. does that mean it can only lift 17 lbs? so if i wanted to lift something weighing 50 lbs into the air i would need 3 jet engines? thanks
Asked by James M - Sat May 17 10:20:19 2008 - - 4 Answers - 1 Comments
A. Theoretically yes. If you point an airplane straight up and it has more thrust than it weighs it will climb. Called thrust/weight ratio. A Harrier hovering is producing exactly the same thrust in lbs. as the aircraft weight. And no, lift is not 100% generated by the wings. If that were true, how does an airplane fly on knife edge? And folks, a saturn V rocket has many pounds of thrust and no wings. Hmmm. Were talking engine power here folks, not aerodynamics. He wants to know if thrust can lift things. You bet it can. No wings required.
Answered by John B - Sat May 17 12:56:55 2008
Is this a decent exercise routine?
Q. Im 14 years old about 5'2. 103 lbs. I am starting to devolpe a routine for some muscle work and growth. (By the way doing this won't effect my growth will it because i need some height??) It consist of about 50 push ups, squat thrust, using a eliptical for 5 min, doing about 60 crunches (with chin up, hands on ears), doing some mountain climbers and squating with dumbells? is this decent if I increase it in a few weeks?
Asked by hockeyman07 - Wed Feb 20 21:36:05 2008 - - 4 Answers - 0 Comments
A. yep..
Answered by chase. - Wed Feb 20 21:40:36 2008
Q. Im 14 years old about 5'2. 103 lbs. I am starting to devolpe a routine for some muscle work and growth. (By the way doing this won't effect my growth will it because i need some height??) It consist of about 50 push ups, squat thrust, using a eliptical for 5 min, doing about 60 crunches (with chin up, hands on ears), doing some mountain climbers and squating with dumbells? is this decent if I increase it in a few weeks?
Asked by hockeyman07 - Wed Feb 20 21:36:05 2008 - - 4 Answers - 0 Comments
A. yep..
Answered by chase. - Wed Feb 20 21:40:36 2008
Looking for ultralight weight turbjet engines...for sale...any good manufacturers out there?
Q. hopeful specifications are 22-30 inch diameter, 150-200 lbs and 900 lbf of thrust.
Asked by Nate B - Tue Feb 17 11:40:10 2009 - - 2 Answers - 0 Comments
Q. hopeful specifications are 22-30 inch diameter, 150-200 lbs and 900 lbf of thrust.
Asked by Nate B - Tue Feb 17 11:40:10 2009 - - 2 Answers - 0 Comments
can someone help me with this math problem? I came up with 2.88 for the answer but im not sure that its right.?
Q. Using the change (delta) in velocity that must be used to lower the perigee to a 60-mile altitude (This was your answer to the Shuttle math question for Lesson 1) and assuming the Orbiter's OMS engines have a combined force (thrust) of 12,000 lbs and the Shuttle has a weight of 250,000 lbs (with a full cargo bay), use the equations below to compute the length (or time) of the burn necessary in minutes. f = ma force equals mass times acceleration and t = v/a time equals velocity divided by acceleration Your acceleration will be in G's, where 1 G = 32 feet per second per second (this is how far an object travels due to the force of gravity in a vacuum
Asked by red_movies_mall - Mon Jan 26 15:01:34 2009 - - 1 Answers - 0 Comments
Q. Using the change (delta) in velocity that must be used to lower the perigee to a 60-mile altitude (This was your answer to the Shuttle math question for Lesson 1) and assuming the Orbiter's OMS engines have a combined force (thrust) of 12,000 lbs and the Shuttle has a weight of 250,000 lbs (with a full cargo bay), use the equations below to compute the length (or time) of the burn necessary in minutes. f = ma force equals mass times acceleration and t = v/a time equals velocity divided by acceleration Your acceleration will be in G's, where 1 G = 32 feet per second per second (this is how far an object travels due to the force of gravity in a vacuum
Asked by red_movies_mall - Mon Jan 26 15:01:34 2009 - - 1 Answers - 0 Comments
Rocket POWER question... HELP!!!?
Q. What is the maximum power of a rocket with 3 parallel J2-X engines? What is the total thrust of the engines configured in this way? I need this in order to find the cost for launch. total thrust: total wet mass: 1,244,000~1,300,000 lbs *air-launched Isp= 465
Asked by Nick K - Sat Apr 4 17:33:15 2009 - - 1 Answers - 1 Comments
A. From the ref., vacuum thrust will be 294,000 pounds, and specific impulse will be 448 seconds. The sea-level thrust will be less, depending on the nozzle expansion ratio. A parallel trio will have 3 times the single-engine thrust. The idea of specifying the power of a rocket engine is difficult, since power = thrust * current velocity. So power is zero at the moment of liftoff (if the engine we're talking about is first-stage) and increases during acceleration. Low earth orbit velocity is about 7000 m/s, so a tiny 1-N thrust provides 7 kW of power!
Answered by kirchwey - Sat Apr 4 18:26:28 2009
Q. What is the maximum power of a rocket with 3 parallel J2-X engines? What is the total thrust of the engines configured in this way? I need this in order to find the cost for launch. total thrust: total wet mass: 1,244,000~1,300,000 lbs *air-launched Isp= 465
Asked by Nick K - Sat Apr 4 17:33:15 2009 - - 1 Answers - 1 Comments
A. From the ref., vacuum thrust will be 294,000 pounds, and specific impulse will be 448 seconds. The sea-level thrust will be less, depending on the nozzle expansion ratio. A parallel trio will have 3 times the single-engine thrust. The idea of specifying the power of a rocket engine is difficult, since power = thrust * current velocity. So power is zero at the moment of liftoff (if the engine we're talking about is first-stage) and increases during acceleration. Low earth orbit velocity is about 7000 m/s, so a tiny 1-N thrust provides 7 kW of power!
Answered by kirchwey - Sat Apr 4 18:26:28 2009
LIGHTLEGACYIVELY PARISHILTON-ANNPRESSLY,ho w is this for a Ninjutsu Bodybuilding Program?
Q. Shoulders Clean and presses: 2 sets, 8 repsLats Barbell pullovers: 2 sets, 8 repsBiceps Barbell curls: 2 sets, 8 reps Chest Bench-presses: 2 sets, 6 reps Lower Back/Glutes/Hams Good mornings: 2 sets, 8 reps Quads Squats: 2 sets, 12 reps Abs Waist Twists: 4 sets, 90 repetitions Sit up Twist: 4 sets, 20 repetitions Leg Raises: 4 sets, 20 repetitions Leaning Twist: 4 sets, 50 repetitions Bruce Lee s training focused on toning and compound exercises rather than concentration and mass. Bodybuilding played only a small part in his physical conditioning, with stretching and aerobics taking up the rest of his exercise cycle. He would perform this weight-lifting routine every other day. Bruce Lee s Beginning Bodybuilding Routine: Squat: 3 set… [cont.]
Asked by BATMAN - Fri Nov 28 13:49:39 2008 - - 3 Answers - 0 Comments
A. Excellent question! What does Bruce Lee have to do with Ninjutsu?
Answered by Bujinkan Ninja - Sat Nov 29 02:02:56 2008
Q. Shoulders Clean and presses: 2 sets, 8 repsLats Barbell pullovers: 2 sets, 8 repsBiceps Barbell curls: 2 sets, 8 reps Chest Bench-presses: 2 sets, 6 reps Lower Back/Glutes/Hams Good mornings: 2 sets, 8 reps Quads Squats: 2 sets, 12 reps Abs Waist Twists: 4 sets, 90 repetitions Sit up Twist: 4 sets, 20 repetitions Leg Raises: 4 sets, 20 repetitions Leaning Twist: 4 sets, 50 repetitions Bruce Lee s training focused on toning and compound exercises rather than concentration and mass. Bodybuilding played only a small part in his physical conditioning, with stretching and aerobics taking up the rest of his exercise cycle. He would perform this weight-lifting routine every other day. Bruce Lee s Beginning Bodybuilding Routine: Squat: 3 set… [cont.]
Asked by BATMAN - Fri Nov 28 13:49:39 2008 - - 3 Answers - 0 Comments
A. Excellent question! What does Bruce Lee have to do with Ninjutsu?
Answered by Bujinkan Ninja - Sat Nov 29 02:02:56 2008
I need your opinions, Ladies.?
Q. My gf is always complaint about my freakiestly large size, 12" inches in length & almost 2.5" inches in diameter. She said it hurts so bad if I thrust in a rapid motion and plus I'm muscularly built and stand at 7'2" & weigh about 450 lbs. When I was on top and go all the way inside it would penetrate into her uterus, dat even cause more painful for her and would leave a bruise mark on the outside. Then she suggest dat she wanna be on top from now on, but it still hurt and my gf is not a small size lady at all, she's almost 6 feet tall. The weird thing is dat after I pull out of her, her down-stair open up very wide and seems to have some kinda muscle contractile moments. So, ladies do u have any suggestions to help my gf ease the… [cont.]
Asked by BIG ANACONDA - Sat May 13 21:19:26 2006 - - 10 Answers - 0 Comments
A. Gosh, your'e such a big guy I don't know who can help you except for that sex doctor on t.v. that comes on late at night. I think her name is Dr.Johanson and the show is called "Talk Sex". She answers all kinds of sex questions on the air and you don't have to give your name. She's really good too. You can also find that answer on her website. I think its talksex.com or just put her name in your search engine. I'm sure something will pop up for her.
Answered by Common_Sense2 - Sat May 13 21:25:45 2006
Q. My gf is always complaint about my freakiestly large size, 12" inches in length & almost 2.5" inches in diameter. She said it hurts so bad if I thrust in a rapid motion and plus I'm muscularly built and stand at 7'2" & weigh about 450 lbs. When I was on top and go all the way inside it would penetrate into her uterus, dat even cause more painful for her and would leave a bruise mark on the outside. Then she suggest dat she wanna be on top from now on, but it still hurt and my gf is not a small size lady at all, she's almost 6 feet tall. The weird thing is dat after I pull out of her, her down-stair open up very wide and seems to have some kinda muscle contractile moments. So, ladies do u have any suggestions to help my gf ease the… [cont.]
Asked by BIG ANACONDA - Sat May 13 21:19:26 2006 - - 10 Answers - 0 Comments
A. Gosh, your'e such a big guy I don't know who can help you except for that sex doctor on t.v. that comes on late at night. I think her name is Dr.Johanson and the show is called "Talk Sex". She answers all kinds of sex questions on the air and you don't have to give your name. She's really good too. You can also find that answer on her website. I think its talksex.com or just put her name in your search engine. I'm sure something will pop up for her.
Answered by Common_Sense2 - Sat May 13 21:25:45 2006
From Yahoo Answer Search: 'lbs thrust'
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