466 



Popular Science Monthly 



An Exhaust Pipe Heater for a 

 Motorcycle Sidecar 



THE motorcycle sidecar can be made 

 quite comfortable in winter if the ex- 

 haust is extended and a coil placed in the 



A pipe with a coil inside the car body is mn 

 from the exhaust of the engine to the sidecar 



front of the car. It requires only a piece 

 of pipe or tubing that can be easily bent 

 into the shape desired. The size will de- 



pend on the exhaust opening. A pipe 

 should be secured with an inside diameter 

 the same as the outside diameter of the 

 exhaust. It is then run to the front of the 

 car where it enters. On the inside it forms 

 a coil, the end running through the bottom 

 to the outside. — Fritz M. Meyer. 



Right Pressure for Bead Molds in 

 Making Tire Repairs 



IN making sectional repairs, bead molds 

 should be tightened until the cavity is 

 the exact size of the tire. Then an added 

 quarter turn of the clamp gcrew will give 

 just enough pressure to insure the proper 

 flow of the gum. This turn saves the air- 

 bag considerable strain. However, if much 

 more pressure is exerted there is danger 

 that the fabric or the inside surface of the 

 repaired section will buckle or bulge. 



Our Prize Motorcycle Contest 



THE Motorcycle Contest has been a brilliant success. It brought from all parts 

 of the country the most interesting practical suggestions from enthusiastic 

 motorcycle readers that we have ever seen. While the Mechanical Editor of the 

 Popular Science Monthly had anticipated a stirring contest, he was by no 

 means prepared for the scores of striking suggestions which he has received. As a 

 result, he has decided to keep and pay for a far larger number of articles than he 

 had planned. The prize winning article will appear in the next issue of the 

 Popular Science Monthly. 



The following are the names of the prize winners and the names of those 

 whose articles were considered of such merit that they have been bought: 



The Three Grand Prizes were Awarded to : 



First Prize of $25 — B. M. Ikert — How to Build 

 a Motorcycle Garage. 



Second Prize of $15 — Edwin C. Schurch — Re- 

 Modeling the Motorcycle. 



Third Prize of $10 — David W. Freye — Dynamo 

 Lighting System for the Motorcycle. 



The following articles that did not win a prize 

 but were of sufficient merit to be used in the 

 Practical Workers department: 



W. G. Paulson— Things to Know About Motor- 

 cycle Clutches. 



W. A. Jones — Brake for a Belt Drive Tank 

 Pump. 



John F. Fetterlt — A Motorcycle Jack. 



Paul Justus — Troubles with the Safety Spark 

 Gap. 



William H. Smith — A Spark Plug Lock for a 

 Motorcycle. 



George Stoneham — A Motorcycle Wind Shield. 



W. H. Sargeant — Repairing a Broken Motor- 

 cycle Frame. 



J. R. Schultz — Repair Link Made of Cotters. 



Harold E. Page — Temporary Repair on a 

 Broken Valve Spring. 



W. Drynan — Holding Lock on Motorcycle to 



Prevent Rattle — Sidecar Heater. 

 Joseph F. Sylvia — Extension Axle for a Sidecar. 

 Ray E. Stewart — Combination Tandem Seat and 



Tool Box. 

 Duncan Dillon — Repairing Gasoline Pipe with 



Oiled Paper. 

 Oscar B. Becker — Coin Used to Close Hole of 



Broken Oil Window. 

 George Thornton Morris — Detecting Leaks in 



Inner Tubes with Smoke. 

 Chas. A. Speer — How to Patch an Aluminum 



Crankcase. 

 H. E. Fitzer — Keeping Oil from the V-belt. 

 Joseph Schmelzeis — Running Home Without a 



Carburetor. 

 Roy K. Taylor — Sidecar Wheel Stand. 

 B. Husmann — Substitute for a Broken Valve 



Spring. 

 John E. Hogg — Road Repair for Broken Cones 



and Bearings — -Temporary Repair on a 



Clutch Pedal Stand. 

 N. Winderlich— A Valve Tool. 

 Ernest Ofeldt — Taking Up Wear in Pitman 



Bearings. 

 R. W. Jamison — Substitute for a Lost Bronze 



Bearing. 

 William F. Bacchus — Repairing Crankshaft. 



