The flying wheel
Media
Part of The Young Citizen: The Magazine for Young People
- Title
- The flying wheel
- Language
- English
- Source
- Young Citizen, 7 (9) September 1941
- Year
- 1941
- Subject
- Do-it-yourself work
- Flywheels
- Rights
-
- Fulltext
- 332 THE YOUNG CITIZEN SEPTEMBER, 1941 WORK AND PLAY SECTION THE FLYING WHEEL THIS is a simple little toy which can be made at no cost at all out of a post-card or a piece of light weight cardboard. On the cardboard draw a circle about three inches 'in'diameter. To do this easily you can draw around a tea cup which is turned upside down. When the circle is well draw~, cut it out with a pair of scissors. Inside of this draw another circle about two inches in diameter. To do this ea.sily draw arOUIJd a glass tumbler which is turned upside down. Across the smaller circle draw a line through the center of the circle. Draw another line at right angles to the first. (Plense turn to page· 339.) THE WIND-BALL GET a piece of thin carllboard or stiff paper. Cut out of it three discs, each about three inches in diameter. Or aw straight lines upon them as shown in the picture. Then cut along these lines with a sharp penknife, taking care that .the various lines correspond in length. Now slip the .second disc over the first, so that you get a double disc as shown in the picture. Over this arrange ihe third disc, which gives the complete wind-ball. Be careful in putting the discs together. Place.the wind-ball on a smooth walk on a windy day, and it will race along quite .fast. · Or you can blow it across a table from one side to the other. A boy can stand (Pleau turn to page 339.) · HOW TO MEASURE THE DIAMETER OF A BALL You may have learned in school that the diameter of a ball is the distance through it, passing_ through the center. To measure the diameter of a ball exactly may not seem a very easy task, but there is a way of doing this which is quite simple. Take two blocks of wood, or two boxes, a little higher and wider than the ball, stand these on a table with their sides touching a wall or a larger box which is on the table. Bet"ween the two boxes or blocks place the ball as shown in the picture. Still keeping the sides against the wall, or large box, bring the two blocks or small boxes together until they touch the ball. Now take a ruler and measure the distance between the two boxes, taking care to keep everything quite still and level. Thus, in a very simple manner, you have found out the distance through the ball at its· center. If you want to .find the distance around the tlall (the circumference) multiply the diameter by 3.1416, or, roughly, by 3 and 117. SEPTEMBER, 19+1 THE YOUNG CITIZEN 339 A FRIDAY PROGRAM FLYING WHEEL MAKING A SCRAP BOOK (Continued from page 337) (Continued from page 332) (Continued from "page 337) very much, ·tor the magi- Then between these draw side of it also. Then I loosecian did many marvellous two more lines, and then ly tie all the sheets and the things. He taught us all four more, so there are cover together with a fancy how to do one trick, but eight lines crossing the cen- ribbon which. I ·save from there· is no fun in a trick ter at equal distances apart a bqx of candy. after you understand how as shown in the first picture. I find great pleasure in it is done. With a sharp penknife making a scrap book in_ this The program committee cut along these straight way,. and the scrap books never tells what is going to Jines and then turn the which I have made seem to ?e. given at the program- poin;s upward and down- give pleasure to my classit is always ,kept secret un- ward alternately, as shown mates. Mother is glad to til the thime comes: 1 And in the second. picture. The have me make su. ch scrap then-w at a surprise. · · b k · W II . 1 . flying wheel 1s now com1 oo s, for she thinks I learn e a enioy p anning 1 S . II' h · · h A the programs, getting them p ete. et 1t ro .mg out- t ,mgs mt at way. ny way d d . . th doors during a windy day 1t s lots of fun to make one. rea y, an giving em. . T . · Our teacher thinks this is on a smooth walk, .and 1t ry 1t. an incentive to cause us to will whirl along at a great ----------read stories' and poems in speed. BALANCING ZOO search of program mate- (Conti11ued from page 333) rial, and teaches us to have WIND-BALL well. The reason is that by initiative and executi,·e (Contiliued frorfl page 332 ) curling the tail and curving abil_ity. on one side of the table, the body the center of WINDOW BOXES another boy on' the other gravity of the whole object . side, and the two boys can is kept down towards the ( (iontlnu•d from page 337 ) blow it backwards and for- lower half and under the slope; I washed the earth wards. projecting claw, so that the from it and dried it. After the six boxes were Y o.u can make a game by animal is not top heavy. filled with soil and were in drawing a chalk mark The same principle apthe windows, my problem across the - center -of the plies to each of the. toyswas to find suitable flower- table. One boy tries to blow the shaping and curving ing plants. I planted some the wind-ball across the keeps the center of gravity wdena-de-amor in each box line. The other tries to just where it should be to' and some nasturtiums. prevent him from doing preserve the balance. This got some petunias also, and this and at the same time is often done by means of some small sized mari- tries to blow it acros& the a lead weight. If these cardgolds. After a few months line. When a boy succeeds, board animals are well my plants began to bloom. he scores one point. The made, no. lead weight is How pretty they looked, boy scoring five points first needed. and how attractive· they wins the game. Don't you So these interesting toys made the windows appear! 1 want' to make a wind-ball?, are quite scientific.