Popular Science Monthly 



137 



so that when the lever is in a vertical 

 position the drive wheel will be raised 

 3 in. from the ground. The brake pedal 

 is shown in Fig. 11. Its position de- 

 pends upon the side of the wheel hub 

 chosen for the location of the brake lever. 

 It is connected with the brake lever with 

 the No. 6 wire. 



The engine can now be placed and 

 lined up. This must be done carefully, 

 as a very slight error may be the cause 

 of a broken chain. As no two types of 

 engines are mounted exactly alike, it will 

 be necessary for the builder to devise 

 a mounting for the particular kind at 

 hand. One form of support, with per- 

 haps a few alterations, should fit any 

 ordinary engine, as shown in Fig. 12. 

 The exhaust pipes may need to be bent 

 to clear the engine supports. If there is 

 no objection to noise they can be cut 

 off to a length of 6 in. and the muffler 

 discarded. 



One way to arrange the engine controls 

 is to run wires or rods from the throttle 

 and magneto to small levers placed at the 

 side of the seat. Means must be pro- 

 vided to keep the levers in position when 

 once set. If the engine is equipped with 

 battery ignition a box for the cells can be 

 constructed under the seat. 



Almost any kind of a tank may be used 

 for the gasoline. The one shown was a 

 motorcycle tank 6 in. in diameter and 20 

 in. long with compartments for both gaso- 

 line and oil. If one of this type is not 

 obtainable, a two-quart can fastened to 

 the seat back and connected with the 

 engine by brass tubing can be used for 

 the oil. 



With some types of engines it may be 

 possible to provide a crank for starting 

 purposes, otherwise it will be necessary 

 to turn the drive wheel over. If desired, 

 the seat can be made wider to accommo- 

 date two passengers, although this will 

 mean changing the position of the steer- 

 ing wheel and lever, and making the seat 

 higher so that the rod from the lever 

 will pass underneath. 



While the plans show an open sled, 

 a hood for the front may be attached in 

 order to avoid possible discomfort on a 

 long drive. Such a hood can be made 

 from sheet metal in any desired shape 

 and attached, so that it will protect the 

 rider. The hood may be given a form 

 similar to the ones used on automobiles, 

 so that it will come up well over the 

 driver's legs, and should have a wind- 

 shield at the top to protect the face. 



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Details of all the parts entering into the construction of a motor sled to be driven 

 by a motorcycle engine of nine horsepower mounted on the rear part of the frame 



