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Home✈️Aircraft🚁Helicoptere-Elec-Helicopters New or Limited ActivityNext-D › Problem w/ setup (specifically linkage lengths)
04-25-2009 07:32 PM  10 years ago
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reiserrob2003

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Brockton, MA.

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Problem w/ setup (specifically linkage lengths)
My Rave build went absolutely smooth, possibly the smoothest heli I've ever built, except for when I got to the final electronic installation. The linkage lengths given in the book do not even come close to where they nee to be. Does anyone know the real measurements to get a +12,-12 or so pitch range
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04-25-2009 07:37 PM  10 years ago
Awesome

rrApprentice

Ireland

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My linkage lenghts were exactly as recommended in the manual and I ended up at +-12Deg without any further adjustments.

I know it's probably not what you want to hear

What servos are you using?

Kieran
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04-25-2009 07:40 PM  10 years ago
Heli Joc

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Atlanta, GA

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Buzzin Brian
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Location: College Station, Texas

My Posts This: Topic Forum Ok guys here was what I found. Without modifying the rods I was able to get +-12 degrees. This was achieved by setting the rods to the stock length and then going through the proceedure used to zero out the blades and level the swashplate. On mine the long rod on the swash wound up being 46mm. To get the desired 14 degrees pitch we did discover that the elevator pushrod is indeed about 1.5mm to long and needed to have 0.75mm of material trimed off of either end. I did this with a belt sander, but a Dremel tool would work just as well. It took all of 2 minutes to do the mod. Also I did increase the pitch travel in the transmitter to 75%, lengthened the long swashplate pushrod to 48mm. I then shortened the length of the rods from the servos to the swash by about 1.5mm as was stated in the last post (I did not trim the metal rod! I turned the ball links in until the length was shorter over all. It was 15mm, I shortened the length to 13mm). After looking at one of Curtis's machines we discovered that the reason we didn't think the elevator pushrod was to long was because his was threading to far into the link. This did work but is not recommended as you might damage the link if you go too far. The modification is very easy, and at some point this will be addressed in the kit. Thank you guys very much for pointing this out to us. Let me be clear here, the only actual rod I shortened was the elevator servo pushrod. The other length adjustments I was able to achieve by threading the links on a little more.

Brian
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04-26-2009 06:47 AM  10 years ago
JSX

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France

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hi
-RODS LENGHT

TO HAVE +/- 14° >>
1. Grind away 1mm from each end of each rod going from servo horn to swash rod correct?

2. Rods from swash to top mixer are to be 46.5mm in distance apart, link to link as shown in manual, correct?

3. 28 and 13mm for measurements for the finals as horns to swash for those specific measurements correct?
>> from Hootool topic
Jsx
~¤°Rave~4S/350¤Trex250°¤~
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04-27-2009 02:12 AM  10 years ago
mystar60

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Clifton, NJ

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You can also find the latest addendum on Buzzin Brians Gallery
http://runryder.com/gallery/732/
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04-29-2009 12:48 AM  10 years ago
reiserrob2003

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Brockton, MA.

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thanks guys, i took a little material off the ends and the rest is easy
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