ACOA 



A SPEEDY coasting bob which is 

 large enough to accommodate 

 several passengers has ever been a 

 favorite with boys wherever snow falls. 

 The sled illustrated is an especially good 

 design in that it is a fast, smooth runner, 

 strong and serviceable but not too heavy 

 to be pulled up grade. A careful study 

 of the drawings will make it clear 

 just how the runner is made. 



The seat should be made from some 

 light but strong wood, spruce being the 

 first choice. Cedar, pine and hemlock 

 are also good, the preference being in 

 the order named. As shown in the 

 profile sketch and in the scale drawing, 

 the seat is 14 ft. long and 12 in. wide. 

 It should be of 

 selected stock, 

 l^ in. thick, 

 without large 

 knots or other 

 defects. The 

 cross - pieces 

 which form the 

 foot-rests are 

 sawed from 

 %-in. oak, and 

 should be 22 in. 

 long and 3 in. 

 wide. These 

 cross sticks are 

 solidly screwed 



C 



S 



=r 



:j\ 



t: 



The profile of bob and plan of seat board with 

 crossbars for foot-rests and tie-strips at the irends 



The rear sled is 4 ft. long and 18 in. 

 wide. The sides are made of oak ij^ in. 

 thick, and should be 4 ft. long and 5 in. 

 wide. The two cross-pieces are of 

 1 34 in. oak, mortised into the sides and 

 firmly fastened with 3-in. flat-headed 

 screws. The rear rocker-blocks are shaped 

 as shown at A and B in the drawing on 

 the following page. These should be of 

 1 34 or 1 3^ in. oak of the dimensions 

 given. Two pairs will be needed, 

 each pair being mounted to a flat base 

 of oak 1 3^ or 2 in. thick, 12 in. long and 

 the width of the sled. These curved 



rocker-blocks 

 are solidly 

 bolted to the 

 base and the lat- 

 ter is mortised 

 into the top sides 

 of the runners 

 and screwed to 

 them, as shown 

 at C. 



Through the 

 curved cheeks of 

 the rockers a hole 

 is bored and a 



5%. 



14 



C 



^ 



H16--HI 

 ^1 



,6-^ 



^-in. iron bolt 



to the under side of the seat plank, 

 16 in. apart, as shown. On the upper 

 side of these rests, a strip of oak i in. 

 square is solidly screwed to the foot-rests 

 flush with the ends. This serves to 

 strengthen them and also adds to the 

 appearance. At 18 in. from the end 

 selected for the forward end of the 

 sled, bore a hole in the center to admit 

 the steering post, as shown. 



is run through. 

 This "teeter bolt" construction is the 

 very best method of fastening the rear 

 sled, and is much superior to the usual 

 rigid crossbar type commonly used. 

 The illustration D is a kind of X-Ray 

 sketch showing how the two pairs of 

 rockers are assembled — the top pair 

 being bolted to the under side of the seat. 

 The runners are shod with \}/i-\x\. half- 

 round iron, which is solidly attached to 



139 



