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Old 25.01.03, 23:57
Chris True Chris True is offline
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Join Date: Jun 2001
Location: St. Mary\'s City, Maryland, USA
Posts: 172
Default Mixer arm choices?

What/how are you guys running your mixer arms? I have the metal head and had been flying with the mixer arms arranged so the short side connected to the flybar. The flybar tilts more that way and the rods which drop down to the swash clear the flybar carrier better.

Here's why I ask. A long time ago before my Eco's crash I had rocket like climbs, once it crashed and I put it back together the climb power is good but not in the WOW category. I discovered the probable reason last night, I probably had the mixers the other way before the crash. The chage dramatically effects the amount of pitch range available. With the long side connected to the flybar I can get -14 to +15 which of course needs to be reduced some on each end to avoid binding when you add swash movement to the picture. I measured it connected the other way and my top end pitch was only about 9.5 degrees.

After swapping so the long end is connected to the flybar and adjusting pitch curves for -9 to +12 I flew it today. Climbs are now SNAPPY . It seems to be better behaved around center too which I'm not sure makes sense. Anyway, how are other metal head flyers running the mixer to flybar connection? The little aluminum levers the mixers attach to do need to be angled inward a bit to avoid interfereance with the swash rods and flyber carrier.
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Old 26.01.03, 00:34
Luxor Luxor is offline
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Join Date: Sep 2000
Location: Olympia, Washington, USA
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Default Re: Mixer arm choices?

Hi Chris.
I have the short side connected to the flybar. After looking at it closely, I can understand why your climbouts are rocket like.
But, I also use the Precision models CNC levers. Precison has added two more holes so you can change the position of the levers, I run mine in the stock location.
Look at the attachment for a pic.
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File Type: jpg 131143-Mvc-346s.jpg (37.2 KB, 52 views)
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  #3  
Old 26.01.03, 03:32
Chris True Chris True is offline
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Join Date: Jun 2001
Location: St. Mary\'s City, Maryland, USA
Posts: 172
Default Re: Mixer arm choices?

Thanks, I looked at mine compared with yours. As you say, the point of rotation is in about the same spot - offset a bit to the right compared to the centerline of the flybar. I also noticed you've got the balls on opposite sides of the arm. Mine are both on the outside - not sure why I did it that way! I can't remember which way the directions showed, your placement matches the stock plastic head parts...

The climb performance is just related to pitch. I could get + 12 with them connected the other way, I just wouldn't get more than -4 or 5 on the bottom end. I'm not necessarily recommending +12 . It is close to running out of the tail rotors ability to hold the nose straight. Guess that is what the tail speedup gear is for...
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