dúnadan: It's the weekend, I'm in Dorset and that can only mean one thing - I am with Gerrie, the inquisitive cow! Hiya Gerrie.
inq. cow: Good day, dúnadan!
dúnadan: Well, there is only subject that we can start with today because we are standing in the shadow of a very large rocket that has a wicker basket tied to it about half way down. What on earth is it doing here?!
inq. cow: 'What on earth' indeed. This is a Solid Rocket Booster that Bertie Pig has acquired to send him into space. His mission is to escape from the earth!
dúnadan: Goodness me. Don't tell me he is going to sit in the wicker basket-!
inq. cow: Don't worry, it is well padded and has a very comfortable chair. Oh, and you can see the windshield to protect against the G-Forces.
dúnadan: Hmm... How did Bertie come by the rocket?
inq. cow: Ah, well, that I don't know, although I can tell you that it comes from the ATK company of America. I know he wrote to them asking to borrow it, so I suppose they obliged. SRBs - Solid Rocket Boosters - are reusable. Did you know that ATK used to be called Thiokol which comes from the Greek for sulfur - Θειο "theio" - and glue - κολλα "kolla". It is always very nice when you hear of companies who are attentive to history!
dúnadan: Indeed. How tall is the rocket? What kind of fuel does it use?
inq. cow: Well, as to its height, the rocket is nearly 150 feet long and 12 feet in diameter. It uses a mixture of fuels. There is ammonium perclorate, aluminum and iron oxide. A polymer called PBAN holds it all together. The short name for the fuel is APCP - Ammonium Perchlorate Composite Propellant. Unfortunately, not all of these are readily obtainable in Dorset, so I did some research into rocket science this week and have borrowed a few barrels of Dorchester Best Bitter from Publican Will with a topping of curdled milk and poured that in instead. Oh, look, Tecumseh's Legion is waving everyone away from the field. It looks like they are about to launch!
bertie's rocket dúnadan: While we dash behind the hedgerow, tell me how the little red baron's battle on the Frome with Hannibal Rabbit went last week!
inq. cow: They continued trading cannonballs until they came in sight of Augustine Squirrel's palafitta. Quite understandably, he did not want his project destroyed by them, so he blew them out of the river with cannonball shots of nuts and pips!
dúnadan: Wonderful! Right, here we are on the verge. I can see Learned Owl and Learning Owlet further on. Horace the Monet loving horse is painting the scene already. The Tercel Triplets are sitting on the field gate... smoke is now coming from the rocket. We are two fields away from Farmer Bill's house. What does he make of all this?
bertie pig: He has been away with relatives in northern Dorset this week. We picked this week for the launch just in case he thought it an escape too far!
dúnadan: The rocket has exploded into life! It is starting to rise. What a noise it is making! Hello Bertie... Bertie! Shouldn't you be in your wicker basket?!
bertie pig: Should I? Yippee!
dúnadan: Oh dear.
inq. cow: There goes the rocket, leaving a trail of thick white smoke behind it. Bertie, we have to recover the rocket from the Severn river and give it back to the nice man from ATK by next Monday so I fear you won't get a second chance to go into outer space... although I think if your astronaut uniform consisted of only those flying goggles that you are wearing, may be that would be a good thing.
dúnadan: The rocket has disappeared. The smoke over the field is clearing and, goodness me, there is a big hole in the middle of it now.
inq. cow: Hmm. That is going to be tricky to hide. Moooh! Still, even if today's launch was not quite so successful, at least we have had the opportunity of seeing Isaac Newton's third law of motion in action.
Mr. Newton's book on motion dúnadan: What is that?
inq. cow: "Actioni contrariam semper et æqualem esse reactionem: sive corporum duorum actiones in se mutuo semper esse æquales et in partes contrarias dirigi." In short, "To every action force there is an equal, but opposite, reaction force". Bertie's rocket was launched by the mass flow rate of the fuel multiplied by its exhaust velocity.
dúnadan: You mean, how fast the fuel was burning?
inq. cow: Mooooo... something like that!
dúnadan: Where is the opposite force, then?
inq. cow: That, I think, is the ground, which it is pushing against. As the rocket has less mass than the ground, it is the object that is pushed away. With that said, rockets work in space where they meet no resistance, so I wonder what is the opposite force there. I suppose it must be the chemical reactions that are taking place in the rocket itself. Humm.
dúnadan: It's all a bit high powered for me. I need to sit down for a bit. .. hullo, here is an abandoned teddy bear.
inq. cow: Are you not an arctophile, dúnadan?
dúnadan: An arctophile?
inq. cow: From the Greek. 'Arcto' meaning bear and 'phile' for lover.
dúnadan: I have a few at home, yes!
inq. cow: When I was a calf, I had many! This one looks like an artist's bear.
dúnadan: ?
inq. cow: Look, it has a movable head and limbs... using disks and cotter pins. I can see the artist's monogram - D. N. - on the bear's paw as well. A commercially made teddy bear would not have any of these things. The movable parts would be dangerous to small children. And, if anything, it would have the company name, not an individual's initials.
dúnadan: How interesting. Well, the poor thing looks very mangy. His fur is matted and in parts he is wholly bald. He must have been here a long time. Hallo, Bertie, I thought you had gone. Would you like a bear?
Bertie's bear! bertie pig: Won't he try to eat me?
dúnadan: No, he is already stuffed!
inq. cow: *groan!* And on that awful note, why don't we end today's interview!
dúnadan: Very well. Cheerio, everyone. See you again next week!