It’s Rocket Science! with Professor Chris Bishop

It’s Rocket Science! with Professor Chris Bishop


rocket science
Good Afternoon and welcome to the Department of Chemistry, Welcome to the Cambridge Science Festival,
And Welcome to this lecture on Rocket Science
Now, every Rocket that has ever flown,
whether its a small firework rocket,
or whether its a giant rocket carrying people to the moon
every rocket is based on one simple principle.
So i thought i’d begin this lecture by demonstrating that principle
So this a beautiful reproduction, in miniature
of a Napoleonic Canon. But its a working model
And its actually capable of firing a live round: A Half inch diameter Lead Cannon Ball
Today we wont fire a live round, but im going to fire a blank round
and when we do, i want you to observe what happens to the cannon
Now the cannon’s really just a tube thats closed on this end (left side) and open at this end (right side)
This is called a muzzle
and theres a small hole we call a “touch hole”
that we use to transmit fire to the main charge
So im going to begin by taking a small slow burning fuse
And placing that in the “touch hole”
Then were going to charge this with gunpowder
So the gunpowder is in this nice powder horn
the way this works is: I put my finger over the brass nozzle, I press the valve and tip it upside down
And powder trickles into that brass spout
So I’m measuring a precise quantity of gunpowder
And I release the valve and turn it upside… right way up again
and we have a measured quantity of gunpowder in the spout
So I’ll place that into the barrel of the cannon
and I thought is since its “Science Week” we’ll use a double dose
*audience laughs*
Here’s a double dose of gunpowder going into the cannon
So that’s the gunpowder,
In the barrel; I’ll put this safely out of the way
Now to keep the gunpowder in the barrel and against the fuse
were going to use a bit of wadding
so this is some fireproof wadding which I’m going to put into the, into the muzzle of the cannon
and then use this “Ram Rod” to pack the wadding and the gunpowder tight up against the fuse.
Now at this point we would put our cannon ball in but were not going to do that today
so instead, we’ll, we’ll simulate that by adding a bit more wadding
so I’m going to put some more wadding into the barrel
and again just pack that down
and then finally, to, uh, to stop the ball rolling out, as it were,
we’d use a bit more wadding. So, why not, lets do a bit more wadding.
*audience laughs*
It is the science festival after all.
Okay, so we’ve got this wadding nicely pack down.
Our cannon, uh will be loaded, and it’s now ready to fire.
So I’m going to light the fuse
from where I’m standing, it’s quite noisy, so I’m going to be covering my ears;
if you’re near the front, you may wish to do the same.

100 thoughts on “It’s Rocket Science! with Professor Chris Bishop”

  1. I wish I had you as my chemistry teacher here in the US, I would have properly understood the material and received a better grade!

  2. If you send a rocket up to near space on a balloon and then launch it if it has sufficient fuel will it reach low or even high orbit?
    If so why are we wasting everything building huge rockets that spend 90% of their fuel getting to near space?

  3. I shot off a few model rockets with a mixture of zinc and sulfur when I was young. I wonder what the oxidizer was in that mixture?

  4. I USED TO LOVE SCIENCE…ASTRONOMY, THEORETICAL PHYSICS, QUANTUM THEORY…JUST ANYTHING HEADY… I GRADUATED EARLY WITH A “TAP” FROM DUKE U… I ALWAYS FOUND IT TO LEAD INTO NOTHINGNESS… SADLY DEAD END AFTER DEAD END…. AS A KID, I WENT TO PROVE EARTHS CURVATURE AS A PROJECT…. 45 YEARS LATER, I HAVE YET TO FIND IT!… ROCKET SCIENCE IS A DEAD END AS IS ASTRONOMY AND NASA…ITS ALL SCIENCE FICTION … IT IS SAD AND SCARY, THE WORLD IS NOT WHAT WE HAVE BEEN TOLD TO THAT IT IS… WE HAVE BEEN LIED TO… QUESTION EVERYTHING FOR YOUR SELF AND THINK FOR YOURSELF. DO NOT BE A BIGOT NOR SUBSCRIBE TO THE DOGMA… QUESTION EVERYTHING AND EVERYONE… FIND THE CURVE FOR YOUR SELF USING SIMPLE TOOLS AND NO HELP FROM OTHERS, DO YOUR OWN EXPERIMENTS… (IT IS FLAT)

  5. This was more FUN than I've had with YouTube in a long time ! I remember learning all of this by exploration and experimentation, (minus some of the more exotic chemical stuff – WOW ! ) back when I was about 11 years old . It was so nice to see the excitement in the young faces as THEY experienced Rocket Science this way ! Chris Bishop – I am a FAN – THANKS !

  6. This man just made at least a dozen kids go into rocketry and avionics. Great lecture! I wish every lecture I had was as interesting as this one.

  7. Ok first of all sorry for long comment but love this "lecture". I have two questions and the first is easy and the second is troubling me. The toast really opened my mind and I thought about the concentrations of elements . I was wondering where the bubbles come from when water boils. Not knowing I think it's because the expansion of the water when it changes states. ( releasing energy or absorbing it?). So it leads me to think back to school and all matter exist in three (or four) states. But I've never seen frozen oxygen. Or nitrogen or even propane. I've bought solid carbon dioxide ( dry ice). I'm just guessing now but I think solid oxygen or nitrogen would explode if brought into "room temperature ". Inverse square of the distance. Absorbing more energy than the environment can emit. Again thank you professor my mind is blown.

  8. Fascinating 58 minutes- every second of it is engrossing. Professor Bishop is fantastic in demonstrating the fantastic concepts of rocket science.

  9. Fantastic speech about rocketry!!
    How about an ion thruster that lifts it power supply from the ground vertically for several minutes! If you click on the purple icon the the left, you can see flight videos etc.. It can also carry a small propellant tank or fly using commercially available solar cells!

  10. Quite a lot of these demonstrations are expensive and hard to get a hold of without licensing. Great video to play during a class though.

  11. If you haven't been to such a lecture as you were a kid – I'm sorry it was not the fault of society or schools – it was the fault of your parents.
    Same with your kids today – if your kid is bored and only playing with his or hers cellphone – it is your fault not attending such type of lecture with your kid. Do something about it and don't wait until your boy or girl is an ignorant teenager. Go learn this stuff yourself – even if it is only on a kids level, but then you can encourage your kid to become a scientist or some other cool job in this field.

  12. I'm 58 years old, loved science my entire life and I must admit, even though this lecture is directed toward children; it was truly captivating! Mr. Chris Bishop breaks the mold of the 'Stuffy old Science Teacher" and delivers instruction with the stoic excitement you'd expect from a British Instructor from Cambridge. I would love to watch every one of his lectures. Brilliant Job Sir!!

  13. I googled his name , I find he is comp sci pro not physicist !!!!! and he is teaching us r s

  14. 👨‍💻🔦Rocket Science! 🚀with 🤵Professor Chris Bishop👍🛰One of the best learning experience i've seen Brillant science doco! 🚀⚡👍

  15. This guy is so inspiring, if i had this teacher on school i'd would end school cum laude, perfect preforming wich waked up my interest for sience again💪

  16. why not try to develop water as the fuel like the sumerians say the annunaki did it- seems like water has its own oxygen molecule as well why doesnt anyone ever believe what was written down so long ago, science has to prove itself and kind of turns into a dogmatic principle to do so…. you dont believe in a god but you have to believe in many other things no-one has or will ever see, whats the difference

  17. Smoke, fire and noise! What's not to like?

    I teach rocketry to middle and high school students and it takes me 3 to 4 hours (over 5 lectures) to cover all of this material, mostly because I have to do it with hand waives and static props. I've got to get some of these demos!

  18. Im studying aerospace engineering(at age 14. Im a nerd.) This helped my friends understand how rockets work a now we are currently working on a hybrid rocket engine.

  19. This is why you need educators that are passionate about their subject and about passing on that passion. Instead what we have are mainly people who see it as just another job where the kids are secondary to the almighty results tables. I was fortunate enough to have a maths teacher like this and is why I went down that route with my life. I would gladly pay an extra 1% income tax if that money went directly to recruiting and paying for people like this to teach children.

  20. 3:42 Cannon
    5:43 CO2 go-kart
    8:53 Full Power: 150,000RPM, 100N Thrust= 10KG 20kWatts power
    12:50 Charcoal, Sulfur , Potassium Nitrate (oxidizer)
    16:16 2 Oxygen molecules per Methane molecule
    18:05 Nitrocellulose
    26:19 Saturn 5
    30:20 Center of Mass vs Center of Pressure
    45:00 Liquid Nitrogen + Hot Water
    46:45 Liquid Oxygen
    48:24 Hypergolic rocket engine description
    49:46 Hypergolic demonstration
    53:40 "Barking Dog"
    56:21 Transparent rocket engine

  21. Been shooting off rockets for 40 years and learned more from this than anything else. Thanks for sharing this with us.

  22. A captivating lecture given by one who obviously knows what he's talking about. This video should excite kids to look deeper into rockets and rocket science.

  23. In the first 100 meters, we saw the distortion caused by the Goo-Pro cameras and we believed that we live on a highly rotating 71% water ball – Globe Earth with a 100 km atmosphere at 1013.25 hPa, together and in the same place in the celestial suction vacuum with a force of 10 to a minus 17 degrees of suction, which completely destroys and completely contradicts the second law of thermodynamics or the so-called natural law of entropy in one system. Only a childish mind with childish, non-logical thinking can still believe we live on a heavily rotating 1666km / h ball at the equator ignoring and totally denying the centrifugal forces on the equator with three quite different densities as one density we have on the water, a second different density we have on land on Earth that is on a level and equal to the density of water and a third density we have on atmospheric gas, which the HelioCentric Theory preaches and inserts that it has been glued to the Earth's surface thanks to our sold "Gravity" Newton's Venture, and that this same "Gravity" holds the oceans, seas 71% water glued, agglutinative motionless to a revolving 1666km / h, at the same time alone circling the Sun with 107,000km / h, at the same time circling spiraling about 112 times big Sun from Earth, Sun – moving like a comet in the middle at a speed of 804,670km / h driven by inexhaustible energy from nowhere, like this absurd Earth Ball – Globus travels with these crazy speeds along with all the other "planets" of the Solar our system, along with all Moons, satellites satellites – 20,000 in number and together with all the absurd cosmic garbage generated by the last 60 years of "Space Programs", which is generated and driven by the same "Gravity" that makes the planets rotate in strict synchronicity with perfect ecliptics and constantly offset orbits to milliseconds? This far outweighs even the boldest fantasy of psycho-asthmatic, psychosomatic, theoretical metaphysics man with a sickly unhealthy phantasmagoric consciousness fiction. Atmospheric internal pressure, which serves to ignite the rocket at the last attempt, comes from behind plus the added internal pressure generated by the system we know from the first law of thermodynamics, which pressure actually quickly fills this little funny vacuum chamber, which pressure is formed from the burnt and ejected gases in vacuum and form a small gas-pressure space that in fact displaces the vacuum and fills with exhaust gases and unburned gases this little space – in this absurd funny – little "vacuum" chamber. Imagine a suction vacuum with a force of 10 to a minus 17 degree suction force plus an external pressure of 1013.25 hPa atmospheric pressure suction vacuum which has a reverse force of 10 to 17 degree of atmospheric gas under pressure, that is suction suction with power 10 to 17 degree, and atmospheric gas pressure, pushing 1013.25 hPa. When they lifted the upper plane of this funny "vacuum" camera, this platform plastic board bent only by the power of its own weight, making us feel like fools to believe that these funny plastic board would withstand the suction vacuum that is a reverse force of 10 to minus 17 degrees without bending inward, plus the force of atmospheric gas that pushes externally with a force of 1013.25 hPa. Each rocket engineer can confirm that there is no rocket engine running at the same time in atmospheric gas and the engine running in a vacuum environment because the rocket gases will be scattered for only a fraction of a second in the vast vacuum space, have nothing to push and have nothing to push in the vacuum to get some boost on this rocket, because the vacuum is nothing, the vacuum has no density. Fire on the rocket can be secured with additional atmospheric pressure, as did this ridiculous, conspiratorial, stupid man after many failed tests, that this rocket will ignite and burn very well in a vacuum if it is secured on that rocket oxygen, .. but this missile has nothing to push, nothing to pushed or propel into the vacuum, because vacuum is nothing, no density, unlike atmospheric gases, which gases will be scattered only in the nano-second in the infinite and vast vacuum space , … but the gases in in this little one funny – small "vacuum" chamber will immediately fill this small space and this small space will no longer be a vacuum and under this condition can now get some impetus to this racket. Why does this a crook – conspiratorial man not use NASA's vacuum chambers, which are a few meters thick and to do this experiment again? We, the well-meaning people with proper logical and critical thinking, know why this conspiratorial man would not do such a test. Because we know it will fail!

  24. In the first 100 meters, we saw the distortion caused by the Goo-Pro cameras and we believed that we live on a highly rotating 71% water ball – Globe Earth with a 100 km atmosphere at 1013.25 hPa, together and in the same place in the celestial suction vacuum with a force of 10 to a minus 17 degrees of suction, which completely destroys and completely contradicts the second law of thermodynamics or the so-called natural law of entropy in one system. Only a childish mind with childish, non-logical thinking can still believe we live on a heavily rotating 1666km / h ball at the equator ignoring and totally denying the centrifugal forces on the equator with three quite different densities as one density we have on the water, a second different density we have on land on Earth that is on a level and equal to the density of water and a third density we have on atmospheric gas, which the HelioCentric Theory preaches and inserts that it has been glued to the Earth's surface thanks to our sold "Gravity" Newton's Venture, and that this same "Gravity" holds the oceans, seas 71% water glued, agglutinative motionless to a revolving 1666km / h, at the same time alone circling the Sun with 107,000km / h, at the same time circling spiraling about 112 times big Sun from Earth, Sun – moving like a comet in the middle at a speed of 804,670km / h driven by inexhaustible energy from nowhere, like this absurd Earth Ball – Globus travels with these crazy speeds along with all the other "planets" of the Solar our system, along with all Moons, satellites satellites – 20,000 in number and together with all the absurd cosmic garbage generated by the last 60 years of "Space Programs", which is generated and driven by the same "Gravity" that makes the planets rotate in strict synchronicity with perfect ecliptics and constantly offset orbits to milliseconds? This far outweighs even the boldest fantasy of psycho-asthmatic, psychosomatic, theoretical metaphysics man with a sickly unhealthy phantasmagoric consciousness fiction. Atmospheric internal pressure, which serves to ignite the rocket at the last attempt, comes from behind plus the added internal pressure generated by the system we know from the first law of thermodynamics, which pressure actually quickly fills this little funny vacuum chamber, which pressure is formed from the burnt and ejected gases in vacuum and form a small gas-pressure space that in fact displaces the vacuum and fills with exhaust gases and unburned gases this little space – in this absurd funny – little "vacuum" chamber. Imagine a suction vacuum with a force of 10 to a minus 17 degree suction force plus an external pressure of 1013.25 hPa atmospheric pressure suction vacuum which has a reverse force of 10 to 17 degree of atmospheric gas under pressure, that is suction suction with power 10 to 17 degree, and atmospheric gas pressure, pushing 1013.25 hPa. When they lifted the upper plane of this funny "vacuum" camera, this platform plastic board bent only by the power of its own weight, making us feel like fools to believe that these funny plastic board would withstand the suction vacuum that is a reverse force of 10 to minus 17 degrees without bending inward, plus the force of atmospheric gas that pushes externally with a force of 1013.25 hPa. Each rocket engineer can confirm that there is no rocket engine running at the same time in atmospheric gas and the engine running in a vacuum environment because the rocket gases will be scattered for only a fraction of a second in the vast vacuum space, have nothing to push and have nothing to push in the vacuum to get some boost on this rocket, because the vacuum is nothing, the vacuum has no density. Fire on the rocket can be secured with additional atmospheric pressure, as did this ridiculous, conspiratorial, stupid man after many failed tests, that this rocket will ignite and burn very well in a vacuum if it is secured on that rocket oxygen, .. but this missile has nothing to push, nothing to pushed or propel into the vacuum, because vacuum is nothing, no density, unlike atmospheric gases, which gases will be scattered only in the nano-second in the infinite and vast vacuum space , … but the gases in in this little one funny – small "vacuum" chamber will immediately fill this small space and this small space will no longer be a vacuum and under this condition can now get some impetus to this racket. Why does this a crook – conspiratorial man not use NASA's vacuum chambers, which are a few meters thick and to do this experiment again? We, the well-meaning people with proper logical and critical thinking, know why this conspiratorial man would not do such a test. Because we know it will fail!

  25. Throwing paper airplanes with a bunsen burner going off is a bad Idea. Pretty sure they could have flaming paper airplanse flying towards tha back😂

  26. This is a fantastically entertaining and informative lecture about rockets. If I may be permitted to be critical about just one thing, it's that the editor of the video keeps cutting away from the action of the experiments, during the experiments, to show us the faces of the lovely people in the audience in the lecture hall. I find this to be INFURIATING. If I wanted to see children and adults be fascinated about various wonderous things, I can search for one of the billions of videos on Youtube exhibiting these looks of joy and surprise and watch them until my heart is content. I don't need to see them during the experiments. Apart from that, I absolutely loved the lecture. 10/10.

  27. 277 people who still beleive rockets can't work in space were not happy with these practical demonstrations.

  28. The last example, the hybrid engine, had just a hint of the "Starfighter howl" produced by the J79 engine in an F104. The 104 maxed out around 1400 mph as the inlet vanes would begin to melt. I wonder what kind of rocket was in the NF104.

  29. These lectures are absolutely amazing. How many more scientists and engineers would there be if all the kids could attend these…

  30. Newton's laws of motion do not work in the vacuum of outer space. When a flare explodes on the sun, it does not send the sun in an opposite direction due to the space vacuum annihilating the energy of the flare. This is a nice show about rockets in close earth atmosphere.

  31. Not what I expected it to be when I clicked the video, however I must say this was excellent. It was presented in a way that young children are likely able to understand some parts of it but most importantly also enjoyed it. It can be hard to keep their short attention spans on complicated subjects at times. So while I was hoping for something more in depth initially I honestly can't say I was disappointed, yes most of the demonstrations were very obvious and predictable but I enjoyed watching it.

    Just one thing I'd have to look up, at 5:10 is the CO2 in a fire extinguisher solid or liquid? Can't remember at which pressure it can be liquid at room temperature nor did I ever actually look up what pressures those extinguishers hold, but I'm guessing Chris Bishop is probably right. But even if it is solid in there, it honestly didn't matter at all for the lecture as a whole.

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