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HomeAircraftHelicopterHIROBOOther › A quick poll on how you have setup your Evo 50 cyclic rod links
02-06-2008 05:56 PM  10 years agoPost 1
Andy from Sandy

rrElite Veteran

Bedfordshire, UK

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Does it make a difference?

Option 1. In the manual it suggests a 2 degree angle behind the centre line is where the balls on the servo horn should be placed and the required distance from the centre. It then goes on about adjusting each rod to get them to fit. The symbol used in the manual is not the usual degree symbol. Do you think it suggests the angle will be approximately 2 degrees?

Option 2. Set both rods to the length from the centre of the X lever to the centre of the servo output shaft. With this length scribe a mark on the servo horn from the ball on the X lever and now measure out from the centre of the horn onto this scribe mark. This yeilds a different degree of angle behind the centre line. As a guess in option 1 the rods possibly end up slightly different lengths.

I did option 2 (but only after 20 months of flying when I thought I would go through the setup again). What have the rest of you done please?

02-06-2008 07:51 PM  10 years agoPost 2



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Hi Andy,

I did option 1 when I built mine. I used the Futaba servo wheel drilling template/jig. Frankly, I felt it was more of a "guess" on the 2 degrees as it was tough to hold perfectly and drill exactly. When I had done that I did still adjust the rods a bit as you've noted. I worked right out of the manual. It was the first heli I've ever built and did so alone so I'm not the best one to answer probably in terms of a difference between the two.


02-06-2008 08:38 PM  10 years agoPost 3


Gretton, Northants - England

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Recon I did option 1 but I use a little jig on the dremel type drill stand having a socket head screw through the servo wheel mounting hole. This is screwed into a plate held in the stand vice allowing me to rotate the wheel under the drill bit.

This guarantees both holes are equal distance from the centre and I judged the offset from the centre line to give the approx 2°. I doubt it is far out or that I would notice the difference if it was a bit out


02-06-2008 09:42 PM  10 years agoPost 4


Rhode Island, USA

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I did option #1 with my own drill guide.

02-07-2008 07:41 AM  10 years agoPost 5
naked painter


Mid glamorgan uk

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I followed option 1 and the manual.


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