Editors Note project advanced modelers Only Extreme caution must constructing device type particularly relieving pressure mousse can certain have thorough under standing assembly procedure before attempting build Mousseler engines compared stock mufflers versions mousse-can mufflers use especially Competition Fun-Fly planes design three-stage unit can expected add about 1000 rpm maintaining noise levels between 89 95 dB depending propeller rpm See Sound Measurements table performance data Mousseler attached engine standard tuned-pipe header already have header can build install Mousseler under $4 cant get free empty mousse can home should able find new buck two discount store Construction First study drawing cut 48-inch piece 5/s-inch OD brass tubing telescoping piece 19A2-inch OD brass tubing 55 inches long Fabricate middle cap piece /si sheet brass Bend petals snug fit 19A2 tube Silver-solder braze cap flush front l9/Q tube solder rear cap time Braze tubes together 3-inch overlap gives tube 10 inches long cap plug near middle Mark 60 hole locations areas B well 36 hole locations area C exhaust three rows holes area C 2 inches apart holes 2-inch centers well row holes staggered respect adjacent rows Drill holesall 156 themwith sharp #48 drill works better about /s inch drill protrudes drillpress chuck Deburr holes running large rat-tail file around inside tube redrill holes deburr final time absolutely certain pressure removed mousse can before drilling holes end Gradually enlarge hole sizes larger drills files tapered reamer until front hole 5/ inch rear 9A2 inch should snug slip-fit Braze Y6I plate rear tube cap off back end does have have interior petals like middle cap Trim edges flush OD 9A2 tube sandpaper smooth circle will slide through mousse can holes Clean outside brass tube first sandpaper alcohol especially areas tube exits mousse can Clean ends can assemble unit end time using high-temperature automotive epoxy called J-B Weld use pressure tap K&B installed 4 inch front mousse can shown Tap mousse can screw pressure tap using liberal amounts J-B Weld Temporarily position Mousseler airplane exhaust holes direct exhaust away plane Note side bottom File notch drill 1As oil-drain holes bottom rear mousse can 9A2 tubes cap Mousseler mounted tunedpipe header silicone tube attached airplane manner similar used tuned pipe Since Mousseler weighs 25 ounces mounting can very light use two #64 rubber bands friend used A2 wire standoff wrapped around exhaust tube rear cap reduces sound about dB measured sideand several dB rearwith no power loss want convince yourself rear cap doesnt rob power leave off temporarily cover uncover open tube thumb engine running rpm being measured Dont worry wont get burned exhaust will relatively cool compared stock muffler odel Aviation few dollars bit time can build effective muffler 32-40 engines U Dick Allen HE MOUSSELER inexpensive mousse-can 1 muffler will add power reduce noise 32- 40-size