Popular Science Monthly 



931 



hole in the center of each. Fasten these 

 two pieces together with the grain running 

 in cross directions or at right angles to each 

 other. Get a piece of iron pipe i]/i in. in 

 diameter for the steering wheel shaft. It 

 should be 27 in. long and drilled with two 

 holes ]/2 in. in diameter, one to be 2 in. 

 from the end and 

 the other at right 

 angles to it, and z /i 

 in. from the end. 

 Fit a piece of rod or 

 pipe with an out- 

 side diameter of Y2 

 in. in the lower hole. 

 The rod or pipe is to 

 be about 9 in. in 

 length. Now place 

 the steering wheel 

 over the pipe shaft 

 and resting on the 

 cross J^-in. pipe. 

 Fasten the wheel to 

 this cross pipe with 

 four eyebolts as in- 

 dicated in the detail 

 drawing. Now slide 

 in the other cross 

 pipe which will just 

 come on the op- 

 posite side of the wheel and fasten that with 

 four eyebolts, also as indicated. This 

 method gives a very solid and strong con- 

 nection between the shaft and wheel. 

 Smooth up the wheel with a file and sand- 

 paper. The 

 wooden wheel 

 will be found eas- 

 ier and warmer 

 to handle in cold 

 weather than a 

 metal one. Now 

 drill the two cot- 

 ter, and the J^-in. 

 holes in the shaft 

 as called for in 

 the illustration. 

 Make two 

 plates and drill 

 them to make a 

 hole \% in. in 

 diameter for the 

 1 34-in. pipe to 

 pass through. 

 Bolt the plates 

 to the upper and 

 lower cross boards of the frame and then 

 place the steering wheel shaft in place. Put 

 on a sufficient number of washers to take 



Wear elate 



fPipe 



Plate 



Brake lever 



iLever bearinq 



Details of the brake lever and the steering 

 wheel and post with cross-bar for the ropes 



up any play and insert two heavy cotter or 

 taper pins — either will answer very well. 

 This is clearly shown in the sectional draw- 

 ing of the steering wheel and detailed at A. 

 The steering motion is carried from the 

 shaft to the sled through a cable of either 

 bronze or other 

 metal — a flexible 

 woven or stranded 

 wire cable of 34 in. 

 diameter will an- 

 swer the purpose 

 very well. A length 

 of the cable is 

 passed through the 

 hole in the lower 

 part of the shaft 

 and a knot tied 

 in either side so 

 as to prevent 

 the cable from 

 slipping through 

 the hole. Make 

 five turns of the 

 cable around the 

 shaft below the 

 hole, from left 

 to right and take 

 five turns from 

 right to left 

 above the hole. Fasten the two ends to the 

 rings on the rear of the sled, being sure to 

 draw the wire tight before fastening. 



The sled should be covered or floored 

 from end to end with some light weight ma- 

 terial, the planks 

 being nailed 

 crosswise. Each 

 plank length, or 

 the width of the 

 flooring on the 

 sled, should be 

 about 20 in. Nail 

 on cross foot- 

 rests or cleats as 

 desired. 



The brake box 

 is supposed to be 

 filled with some 

 heavy stuff so 

 that its own 

 weight willsufhce 

 when only a 

 slight drag or 

 braking is 

 wanted. Fix up 

 a hook and chain so that the brake handle 

 can be held down when not in use. A strong 

 pull on the handle will stop the sled. 



Pipe bearing 



Plate A Plate B Section at brake lever 



Details of the mechanism for operating the 

 brake, the steering wheel and the front 

 bob, all hung to the underside of the frame 



Eye 

 bolts 



1 i" Pipe 

 {'Drilf 



Steering wheel 



