stunthanger.com
Engine basics => Engine set up tips => Topic started by: GonzoBonzo on September 20, 2014, 02:50:41 PM
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Just received an os 25 la. Looking at the muffler, there is a removable cone in the middle where the muffler separates. Is this cone "tuned", anti-reversion, or is it just a restrictive piece to turn down the dB's? What's the best way to use it? Looks like I could go three ways.
TIA
Gonzo
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If it's the E2030 muffler, then whatever OS's intention may have been, it's tuned. At least on the FP 20 (which uses the same muffler) the Brett-Buck recommended set up is to leave it as it is. I suspect that he feels the same way on the LA 25.
I use stock E2030 mufflers on both my LA 25 and my FP 20, and I couldn't be happier.
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Just received an os 25 la. Looking at the muffler, there is a removable cone in the middle where the muffler separates. Is this cone "tuned", anti-reversion, or is it just a restrictive piece to turn down the dB's? What's the best way to use it? Looks like I could go three ways.
I don't know what the intent might have been but leave it as it is, with the cone pointing aft. Do not modify the muffler in any way.
Brett
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my friend (rc flyer, not CL) noticed i was having issues with power on a small plane. he tuned the engine his way, and no difference. he said my muffler was too restrictive. so we took it apart and drilled out that cone. the next two runs were useless. terrible power. i replaced the muffler and the next week my CL friend pointed out my lines were way wrong for that size plane.
moral... don't mess with the cone! lol. i like that muffler. if you want something different, just buy an aftermarket muffler.it's so much nicer than chasing an engine problem.
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Ok, thanks guys. I will leave in as is.