MH 



Popular Scienre Monthly 



When this fifty-six-thousand-pound flywheel is spin- 

 ning in the hold of a ship seasickness is prevented 



Preventing Ships from Rolling by 

 the Use of Giant Flywheels 



TO travel over the roughest seas or 

 through the most varying winds 

 with no rolling or rocking of the craft 

 is believed to be a coming possibility — 

 if it has not already been achic\cci. The 

 new principle has been a[)plied to some ot 

 the smallest yachts and to aeroplanes and 

 is now being extended to larger 

 vessels. 



The accompanying illustration 

 shows the largest steel casting 

 ever made for this new purpose. 

 It weighs 56,000 poiuids and is 

 10 feet in flianu'ter and 2~ inches 

 thick on its face. Two of these 

 are now being installed on a 

 United States army transjiort. 

 They constitute the principal 

 part of what is termed a gjTO- 

 scopic stabilizer. 



The mechanism depends for 

 its success on the fact that 

 when revolving at a high rate of 

 speed, the usual motion im- 

 parted to a vessel b\' tin- wa\es 

 is offset b\- this res'oUing mass. 

 Thifi particular casting revolves 

 1 1 50 times per minute. 



The Sidewalk Coaster Becomes 

 an Automobile 



A MECHANICAL cross-brt^ 

 between the motorcycle and 

 I he boy's sidewalk coaster, is the 

 (inc-passenger motor vehicle 

 practically a motor-driven plat- 

 form, illustrated below. Its 

 pressed steel platform 

 suspended four inches 

 from the ground between 

 wheels is fitted with pneu- 

 matic tires. The motor 

 is attached to the front 

 wheel and provides ample 

 power to meet all road 

 conditions. 



The fact that you stand 

 in driving the vehicle and 

 the further fact that your 

 weight is carried between 

 the wheel centers, makes 

 it very easy to balance 

 the machine. There is 

 practically nothing to 

 watch but the handlebar 

 which supports the rider 

 and steers and controls the operation 

 and speed of the machine. Both brake 

 and clutch are operated by moving the 

 handlebar forward or backward. 



The machine is intended primarily for 

 short distances but enough gasoline can 

 be carried in the tank for a tri|) of one 

 hundred miles. The speed can be in- 

 creased to tweiU\-fi\e miles an hour. 



The handlebar controls the speed of the machine, 

 steers it and operates the brake and the clutch 



