The ' BIG ART ' toungue mufflers , are Ex. Dubro Exhaust Extension ( stack ) material .
HERE is a rip off , but bigger ( LONGER ) AS its a RINGED ENGINE . And I dont like lawnmower mufflers ( weedeater etc ) direct on the port , so we try to let it all out ! .
You can see where sombodys laid it on the bench , put pen lines along it , got masking tape there , held it in a vice , ands used a panel file to bevel the edges .
Then carefully drawn it oveer Wet & Dry sandpaper . AND on the ends to get it dead vertical - Ends TRUE .
Real ones the end plates held with C'sunk head machine screws . Ya wanna be CAREFULL . Clamp Securely . Use Lube ,lots . Or the mount holes ( threaded ) will WANDER .
https://www.worthpoint.com/worthopedia/big-art-tongue-muffler-supertigre-46-117912313Now I cant guess what this might be .
RUNNING IN . I do in COOL WEATHER . Carefully , unmuffled initially or LARGE muffler . AVOID picking up . Short bursts , lengthening . No Nitro .
Freezing , bitch to start . use 10 % fuel as PRIME .
Theres some Eather 11 1/4 x 4 1/2 or somesuch three blade carbon , for more relaxed 4 strokey run .For Switch half way up top or bottom loops of Vertical 8 , cording to kneedle ,
The Black 10 x 6 3 Bl Tornados are excellent up to 2 kilo .
Theres 3/4 turn full 4 to full two . Allways , from scratch , go up ( warm Up ) into the steady 2 stroke , then back out 1/4 turn . And YOURE THERE . Miniscule for fine toon .
the CLAMP NUT so needles not stubborn , on spec. Get it Down CLINCHED so as theres no air bleed , needle'l be Just moveable . As you dont want it to .
( make a lump & rubber band or why for Transport , if your not perfect . 20 % oil 18 after a few hours . Will run on any fuel . 0, 5 , 10 % . A extra gasket ( or two ) with the 10% , if desired .
comment from Bill Bell . " Thats as good an engine run as Ive seen " ( At world chumps etc . ) so We'll picture the Tango Rip Off . 71 Oz . Usually a .46 muffler sans rear tube , sometimes .
WINDY used to ( get ) that machined down to THIS profile . P.S.P. stunt tounge muffler . About 1 1/2 long .
Dubro with edges whacked / routed . 8 or 10 2 mm to 2.4 mm holes .
USE MUFFLER PRESSURE IN ROUGH BUMPY AIR .
The Big Quite Mufflers work really well . With Tissue over silk detroit wing thrumming in the mist on a damp sunday morning everyone lying in bed thinks theres a U.F.O. in the Valley .