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HomeRC & Power✈️Aircraft🚁HelicopterFlybarless Rotor Head SystemsFutaba CGY › FBL Head Blade Grip Control Rod
01-30-2016 07:54 PM  3 years ago
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JLF92677

rrApprentice

Southern California

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FBL Head Blade Grip Control Rod
How critical is to keep the control rod between swashplate and blade grip ball link centered in reference to the main shaft? Or is ok to be offset at an angle tilted toward the blade grip?

Thank you in advance for your input.
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01-30-2016 09:02 PM  3 years ago
Dr.Ben

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Richmond, VA, USA

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Do you mean keeping the rod parallel to the mainshaft?

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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01-31-2016 07:09 AM  3 years ago
JLF92677

rrApprentice

Southern California

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Yes, parallel and centered to the main rotor head shaft.
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01-31-2016 04:01 PM  3 years ago
Pistol Pete

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Seffner, FL

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Chances are Ben is flying today. Im heading out shortly but to get you going in the meantime...

When those rods are angled, that is considered mechanical phasing.

Some models require this due to design. (Multiblades)

Some FBLs have this feature to compensate what cant be done mechanically.

Test by setting blades at zero pitch and facing 12 and 6 o'clock (nose to boom).
Push ELEvator stick full travel in both directions and observe for any pitch change.

It must remain at zero pitch.

Repeat test by facing blades to 9 and 3 o'clock position.
Push AILeron stick full travel.

Same thing, pitch must remain at zero.

IF not, visit swash expert menu (line item 16 in manual, pg24)
"Swash rotation".

You "may" need to make some adjustment in the linkage compensation menu as well. Also in Pg 24 of manual.
~~Enjoying the hobby one flight at a time~~
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01-31-2016 06:37 PM  3 years ago
JLF92677

rrApprentice

Southern California

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Thank you Pistol Pete.

That makes perfect sense. I am modifying a SSR-IV and V from FB to FBL and on both the blade grip ball link is offset toward the blade grip. So I will follow your suggestion to test it and if needed I will get longer pivot balls to align it with the main shaft, but I don't think I will need them. Thank you again for your help and input.

Joe
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02-01-2016 02:21 AM  3 years ago
Dr.Ben

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Richmond, VA, USA

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Nice reply Pete.

The closer you are as well to parallel to the mainshaft, the more even the pitch range above and below half stick and linear input for the cyclic. Before you concentrate so much on that angle, take some collective and cyclic pitch range measurements and confirm pitch rate stays above 45-50% and swash rate is between 50 and 70% for 9 degrees of cyclic. Those numbers are the most important factors in how the 750 will work.

Ben Minor
Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA
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02-01-2016 04:22 AM  3 years ago
JLF92677

rrApprentice

Southern California

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Very helpful info. Thank you Dr. Ben.
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