Inside a muffler

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Have you ever wondered how a muffler works, and how it looks inside?

Well I have, first I look on the internet to find some information on how it works, I found this useful information How a muffler works
. Then I thought! how about a muffler for my nitro engine how does that looked like inside. Luck has it that I had an old Funtech muffler that I did throw in the garbage can, and now I could find out how it looked inside.

Here is a RC Helicopter muffler cut right over. You can see how the air is traveling in the muffler.

Inside a muffler
Inside a muffler
Inside a muffler
Inside a muffler
Inside a muffler

That is how a muffler looks like inside.

I was out flying with my new Hatori muffler the other day. There is a better noise reduction compare to the Funtech muffler, The Hatori is a bit longer then Funtech.
The construction of the Hatori seem better, I did not even have to tighten the mount screws after my flights with a newly mounted Hatori muffler. That’s a first.

Then I removed some weights from my paddles, it is amazing how responsive a Freya 90 Evo can be. :)


Got me a Hatori muffler 938

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After long time of waiting I finally got around to buy a new muffler for my Freya 90, I have heard many good things about the Hatori, and that is what I will try out now. I just got the time to mount it and did not get around flying: I am waiting for better weather and better health, right now I am on medication.

However, the Hatori muffler is bigger compared to the Funtech I had on before. See picture

My new hatori muffler on my Freya 90

For the first time I ordered my RC Helicopter stuff from outside Denmark I only did that because the “local” hobby shop didn’t have the Hatori on stock and then I tried www.world-of-heli.de I am very happy with them good service and quick delivery, and a small chocolate. However, it wasn’t cheaper than my Danish shop sorry to say.

Here is a small warning I have bought some fuel shutoff clamp and they just do not work if you consider buying them DO NOT. The construction is too cheap and I would not consider using them on any helicopter. See picture. It was not a big investment but why sell/produce something that is just not working, or working badly any way.

A defect Fuel clamp from K&S