Best Way To Start A Flooded Engine 1998v70 (with slight diversion to quantum mechanics , relativity, dark matter states,

[MrAl]

Webb is on its way to Lagrange point 2. Text book launch.

Hi,

Yes temporary relief hope it lasts.
You can track the JW progress here:
https://www.jwst.nasa.gov/content/webbL ... sWebb.html
As of this writing, it still has half a million miles to go and is traveling at about 2000 miles per hour so it slowed down slightly. BTW they had to undershoot the launch a little because there is no way to correct the flight path if it is going too fast only if it is going too slow, i thought that was interesting. It's because they cant turn it around and backtrack.
But you know, they did a really good job with the Shuttle when it came to reentry and landing, they had to fly a zig zag pattern in order to lose enough energy to be able to land. That was pretty amazing i think.

Couple minor points:
As to my ECT, it is fixed now.
As to my Verizon cable TV, it's nutty i am paying for THEIR commercials too and they come on about once per hour. That's nuts.

Happy New Year everyone. Any new years resolutions?

[RickHaleParker]

As of this writing, it still has half a million miles to go and is traveling at about 2000 miles per hour so it slowed down slightly. BTW they had to undershoot the launch a little because there is no way to correct the flight path if it is going too fast only if it is going too slow, i thought that was interesting. It's because they cant turn it around and backtrack.

Kind of like designing a runaway ramp. It OK to stop short but if you overshoot the peak it is all over.
If they over shoot, the centrifugal force will be greater the the gravity of the sun and earth. It will keep on going.

A lot of people don't know that, for the most part, spacecrafts coast to their destitution. At our current level of technology, space travel has more in common with Soap Box Derby then it has with your car.

But you know, they did a really good job with the Shuttle when it came to reentry and landing, they had to fly a zig zag pattern in order to lose enough energy to be able to land. That was pretty amazing i think.

I discovered zigzag braking braking when I was 16. It saved me from crashing into an idiot more then once. I never did work out the physics of how it converts and discards Kinetic energy.

As to my ECT, it is fixed now.

Have you had a chance to cold start it yet?

As to my Verizon cable TV, it's nutty i am paying for THEIR commercials too and they come on about once per hour. That's nuts.

Man you already bought the thing .. what more do they want.

Any new years resolutions?

Make it to 2023.

[MrAl]

As of this writing, it still has half a million miles to go and is traveling at about 2000 miles per hour so it slowed down slightly. BTW they had to undershoot the launch a little because there is no way to correct the flight path if it is going too fast only if it is going too slow, i thought that was interesting. It's because they cant turn it around and backtrack.

Kind of like designing a runaway ramp. It OK to stop short but if you overshoot the peak it is all over.
If they over shoot, the centrifugal force will be greater the the gravity of the sun and earth. It will keep on going.

A lot of people don't know that, for the most part, spacecrafts coast to their destitution. At our current level of technology, space travel has more in common with Soap Box Derby then it has with your car.

But you know, they did a really good job with the Shuttle when it came to reentry and landing, they had to fly a zig zag pattern in order to lose enough energy to be able to land. That was pretty amazing i think.

I discovered zigzag braking braking when I was 16. It saved me from crashing into an idiot more then once. I never did work out the physics of how it converts and discards Kinetic energy.

Well you know, pushing a car in a zig zag pattern with zig and zag angles of 45 degrees with just one zig and one zag would incur 1.412 times as much total distance and thus friction and thus uses more total energy. With zig and zag angles of 60 degrees would incur 2 times as much distance and thus friction. So pushing a car 20 feet in a zig zag pattern with just one zig and one zag to reach the destination and angle of 45 degrees would cover a total travel distance of 28.28 feet, while one zig and one zag with 60 degree angles would cover a total travel distance of 40 feet. More distance equals more energy. It's like an accordion the bellows cross sectional length of material is much greater than the cross eaction from front to back when the instrument is compressed. We could of course easily develop a formula and include more than one zig and one zag.

Also along these lines the friction in Earth's atmosphere is of course significant for everyting within it, but interestingly for a craft going very fast in deep space there are still various drag forces that make a super fast craft even more difficult to design. Not only do we have the Einsteinian limitations we also have various factors relating to the density of particles of different kinds. Wouldnt normally think about this for the speed of our real crafts today, but for super duper fast ones it actually limits some types of theorectical interstellar vehicle engines. Who would have thunk it

As to my ECT, it is fixed now.

Have you had a chance to cold start it yet?

Yes it starts ok now just like everyone thought it would.

As to my Verizon cable TV, it's nutty i am paying for THEIR commercials too and they come on about once per hour. That's nuts.

Man you already bought the thing .. what more do they want.

Any new years resolutions?

Make it to 2023.

[volvolugnut]

So how do you do zig-zag braking? Use what ever road surface width and road friction you have to avoid hitting an object in front? I assume there is little chance of straight line braking to avoid the object.

This has become a very interesting thread.

volvolugnut

[BlackBart]

Zig zag braking on the ice isn’t working!

I learned that the Webb isn’t going to sit tight at position L2. It’s going to maneuver around that point over time so that it’s not in the shadow of the earth. Needs the sun for power - the solar array makes 2000 watts.

[RickHaleParker]

Well you know, pushing a car in a zig zag pattern with zig and zag angles of 45 degrees with just one zig and one zag would incur 1.412 times as much total distance and thus friction and thus uses more total energy. With zig and zag angles of 60 degrees would incur 2 times as much distance and thus friction. So pushing a car 20 feet in a zig zag pattern with just one zig and one zag to reach the destination and angle of 45 degrees would cover a total travel distance of 28.28 feet, while one zig and one zag with 60 degree angles would cover a total travel distance of 40 feet. More distance equals more energy. It's like an accordion the bellows cross sectional length of material is much greater than the cross reaction from front to back when the instrument is compressed. We could of course easily develop a formula and include more than one zig and one zag.

Increased distance was my first idea. That did not work so well. Almost lost control. What I found was that you don't need to zigzag the car. You just zigzag the force vector. Turn left as soon as you feel the vector change ,turn right, back and forth maybe 10 - 20° each way. I think it "throws off" Kinetic energy. For the same reason a dropped ball does not return to the same height it was dropped from. I speculate the sideways force compress the air in the tires. Compressed air efficiency is only 10 - 15% efficient. Which means 85 - 90 % of the energy that goes into compressing the air is converted to heat. Brakes work by converting Ke to Te. ( Ke. = 1/2 m V² ) => ( V= √ ( 2Ke/m) ) . The mass stays the same But the Kinetic energy is converted to Thermal energy and discarded. The velocity changes to keep the equation in balance.

Also along these lines the friction in Earth's atmosphere is of course significant for everyting within it, but interestingly for a craft going very fast in deep space there are still various drag forces that make a super fast craft even more difficult to design. Not only do we have the Einsteinian limitations we also have various factors relating to the density of particles of different kinds. Wouldnt normally think about this for the speed of our real crafts today, but for super duper fast ones it actually limits some types of theorectical interstellar vehicle engines. Who would have thunk it

Absolutely! A photon travels at the speed of light .. more precisely the speed of causality, which is the universes speed limit, because it has no mass. The wimpy neutrino maximum speed is a little less then the speed of causality because it does have a little mass. A space ship has got to have mass. I wondered if the maximum speed of a spacecraft will be limited by the mass of it's most massive particles. If you exceed the maximum speed of the most massive particles, the massive particles will lag the lighter particles and the spaceship will come apart at either the atomic or the quantum level.

[abscate]

What did the Higgs Boson say when he got thrown out of Church?

[RickHaleParker]

What did the Higgs Boson say when he got thrown out of Church?

Without me, you cannot have mass.

[BlackBart]

HA!!

V good.

[MrAl]

Well you know, pushing a car in a zig zag pattern with zig and zag angles of 45 degrees with just one zig and one zag would incur 1.412 times as much total distance and thus friction and thus uses more total energy. With zig and zag angles of 60 degrees would incur 2 times as much distance and thus friction. So pushing a car 20 feet in a zig zag pattern with just one zig and one zag to reach the destination and angle of 45 degrees would cover a total travel distance of 28.28 feet, while one zig and one zag with 60 degree angles would cover a total travel distance of 40 feet. More distance equals more energy. It's like an accordion the bellows cross sectional length of material is much greater than the cross reaction from front to back when the instrument is compressed. We could of course easily develop a formula and include more than one zig and one zag.

Increased distance was my first idea. That did not work so well. Almost lost control. What I found was that you don't need to zigzag the car. You just zigzag the force vector. Turn left as soon as you feel the vector change ,turn right, back and forth maybe 10 - 20° each way. I think it "throws off" Kinetic energy. For the same reason a dropped ball does not return to the same height it was dropped from. I speculate the sideways force compress the air in the tires. Compressed air efficiency is only 10 - 15% efficient. Which means 85 - 90 % of the energy that goes into compressing the air is converted to heat. Brakes work by converting Ke to Te. ( Ke. = 1/2 m V² ) => ( V= √ ( 2Ke/m) ) . The mass stays the same But the Kinetic energy is converted to Thermal energy and discarded. The velocity changes to keep the equation in balance.

Also along these lines the friction in Earth's atmosphere is of course significant for everyting within it, but interestingly for a craft going very fast in deep space there are still various drag forces that make a super fast craft even more difficult to design. Not only do we have the Einsteinian limitations we also have various factors relating to the density of particles of different kinds. Wouldnt normally think about this for the speed of our real crafts today, but for super duper fast ones it actually limits some types of theorectical interstellar vehicle engines. Who would have thunk it

Absolutely! A photon travels at the speed of light .. more precisely the speed of causality, which is the universes speed limit, because it has no mass. The wimpy neutrino maximum speed is a little less then the speed of causality because it does have a little mass. A space ship has got to have mass. I wondered if the maximum speed of a spacecraft will be limited by the mass of it's most massive particles. If you exceed the maximum speed of the most massive particles, the massive particles will lag the lighter particles and the spaceship will come apart at either the atomic or the quantum level.

Hi,

Not sure what you mean, increased distance is the whole point because that increases the time the Shuttle spends racing trhough the atmosphere and thus losing energy while not increasing the linear distance. The friction as you know, is a major source of energy dissipation, It's like resistance in an electrical circuit. Increase the conductor length and you increase resistance. Even the symbol for the resistor suggests that as it is a zig zag symbol