ORIGINAL: papaone
Hello
Did anybody use the muffler GSA 30 for OS GT 33 ?
On Hatori page it's written ''Mufflers for Gas Engines targeted to reduce noise without sacrificing performance''
I think tuned pipe (as ES 30 G or 40 G ES Composite) gives better rpm ?
Claude
http://www.hatori-models.co.jp/HP3/k...air/2300e.html
I have not used any muffler on any of my gasoline engines so I don't have a first hand comparison. But judging from power/rpm numbers people are quoting for specific props on muffler, a pipe gives considerable boost in output over the quoted numbers. A pipe enables higher pitches to be used for the same rpm and diameter. OR larger diameter for the same pitch and rpm, but you will have to be careful with larger diameters because noise can increase fast.
A pipe also significantly reduces the noise footprint over mufflers. Expect to be drowned out by any muffled engine flying. Couple a pipe with a 3 bladed prop and a soft mount and you will hear even a larger difference in noise footprint.
I promised photos but just couldn't get to it last night. I may get to it tonight