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HK Piper Cub L-4 version
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kanga View Drop Down
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Posts: 355 		  Quote kanga Quote  Post ReplyReply Direct Link To This Post Posted: 16/Jun/2012 at 2:50pm
In my boats using a Zenoah 23 , I used to use a small amount of woven stainless steel the type you get for washing up
"scrub buds over here is the brand name " they are large strands of stainless steel about 2-3mm wide woven in a mass .

!!DO NOT USE STEEL WOOL !! .

I used to Tease the woven steel out loosley and pack the baffles with it.
I dont know if you could do that on an aircraft muffler though.
Small loss of power but a lot quieter in noise sensitive areas.

Edited by kanga - 16/Jun/2012 at 2:51pm
Helicopters Don't fly,
they just beat the air
into submission :)
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Dutko View Drop Down
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Posts: 69 		  Quote Dutko Quote  Post ReplyReply Direct Link To This Post Posted: 16/Jun/2012 at 4:10pm
Thanks guys,

i already used stainless steel wool in the muffler and it helps!!
Here in The Netherlands we are not allowed to make more noise as
80 dB.

Rgds
Theo

Edited by Dutko - 16/Jun/2012 at 5:03pm
Piper L-4, Piper Cherokee, Calmato Sports 40, Chipmunk, AT-6 Harvard.
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snappy View Drop Down
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Posts: 3293 		  Quote snappy Quote  Post ReplyReply Direct Link To This Post Posted: 16/Jun/2012 at 4:52pm
No more Focus concerts then?
   I'm as happy as a very happy sandboy.
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Posts: 69 		  Quote Dutko Quote  Post ReplyReply Direct Link To This Post Posted: 16/Jun/2012 at 4:56pm
Originally posted by snappy

No more Focus concerts then?


well...... "normal" sound is forbidden but "extreme" sound is allowed

Edited by Dutko - 16/Jun/2012 at 5:10pm
Piper L-4, Piper Cherokee, Calmato Sports 40, Chipmunk, AT-6 Harvard.
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Mustang Sally View Drop Down
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Posts: 1956 		  Quote Mustang Sally Quote  Post ReplyReply Direct Link To This Post Posted: 16/Jun/2012 at 5:22pm
It's when sound becomes noise, the people start to complain
A minimal technical knowledge is required for this hobby; please ensure you know the differences between up and down.
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Posts: 3 		  Quote ama1437 Quote  Post ReplyReply Direct Link To This Post Posted: 01/Jul/2012 at 11:42pm
My J3 seems to not have any instructions. Could be I lost them. (You would NOT believe my workshop.) NO... really, you wouldn't. Anyway, does anyone have them scanned? I tried looking on HK but didn't find anything. And I've read every post here and see no one else has said they didn't get them, so assume I must be at fault. They say, as you get older, that you start to forget things. I don't remember if that's true......

I've been building over 50 years and can do this without them, but I always like to at least see what the manufacturer recommended.

Thanks!

Scott
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Dutko View Drop Down
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Posts: 69 		  Quote Dutko Quote  Post ReplyReply Direct Link To This Post Posted: 01/Jul/2012 at 11:51pm
Hi Scott,

look to the J-3 of HK and scroll down to the price. A couple of lines under the price you see discusion/reviews/video's and then files.
Look in this file and you see the manual!!! It's free to download.

Rgds
Theo



Edited by Dutko - 01/Jul/2012 at 11:51pm
Piper L-4, Piper Cherokee, Calmato Sports 40, Chipmunk, AT-6 Harvard.
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ama1437 View Drop Down
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Posts: 3 		  Quote ama1437 Quote  Post ReplyReply Direct Link To This Post Posted: 02/Jul/2012 at 12:27am
Awesome! Thanks Theo. I never noticed that line of resources before. Much appreciated.

Scott
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Dutko View Drop Down
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Posts: 69 		  Quote Dutko Quote  Post ReplyReply Direct Link To This Post Posted: 02/Jul/2012 at 1:26am
You'r welcome.

Rgds
Theo

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Crashtruk View Drop Down
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Posts: 316 		  Quote Crashtruk Quote  Post ReplyReply Direct Link To This Post Posted: 18/Jul/2012 at 4:24pm
I have about 10 flights up on the L4 now. It's going really well with the exception of the landing gear. I is not very durable and breaks easily. I am a pretty good lander in case you think I have thrashed it. No hard landings and I need to get my welder out and fix it. Great flyer, very big and great fun. I did some side slip approaches on the weekend. Very scale performance. It loves 1/3rd throttle on a 20cc gasser.
www.rcmodelreviews.com
The only time you can have too much fuel is when you're on fire!
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