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Sep 13, 2011, 07:41 AM
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Still constructing ICON A5:D

Still constructing ICON A5
The second big challenge is to refine propeller position.
When I saw my friendís DZ ICON A5, its noise was heavy like a nitro plane.
He suggested that noise is generated when a rotating propeller in high speed closes to tailing edge of a main wing, and a share stress of the air between a propeller and the tailing edge causes pressure gradient.
He moved back the motor 20mm using spacers. He succeeded a good result. The noise was reduced significantly.
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Sep 13, 2011, 08:39 AM
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To make new motor mount, I took every size. Then I cut out every piece.
While I wait glue firmed up, I hooked up a propeller, a spinner and a collet.
There are few type for three-blade spinner. I couldn't find it. So I decided to use a FSK spinner that has not been cut around.
Latest blog entry: My Macchi-M67 oing on!
Sep 30, 2011, 08:34 AM
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Now, there is a little advantage.
This time, I tried to waterproof around the rudder shaft.
From a junk, I saw the rudder shaft is only supported by two plywood boards.
These boards are only put in dual-partitioning fuselages.
There is no glue around these boards.
This means water can easily get through between dual-partitioning fuselages.
I decided to glue around between the boards and fuselages.
Not to stick the rudder shaft, I made two brass pipes.
And I had finished. I expect this process will be effectual to waterproof.
Latest blog entry: My Macchi-M67 oing on!

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