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HomeAircraftHelicopterFlybarless Rotor Head SystemsOther › flybarless head assembly
10-27-2011 12:00 PM  6 years agoPost 1
shaiko

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Chicago, IL - US

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Hello guys,

Please help me understand how a flybrarless head is assembled.
My question is general...the following schematics is just an example:

http://www.completeheli.com/T-Rex-4...-Assembly-Parts

1.Is there usually a rigid connection between the main hub and the
spindle (parts #1 and #14)? Does bolt #3 connect them?

2.If there's no rigid connection between the spindle and the hub is the spindle fully floated and sits only on the dampers? Or the hub has some kind of a ball joint inside it that the spindle slides through?

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10-27-2011 12:03 PM  6 years agoPost 2
Ronald Thomas

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Gainesville, Fl, USA

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Parts 5 and 6 are dampeners that ft around the spindle. The FBL head assembles exactly like a FB head, the difference is in how the grip linkages are attached to the swash..........Ron

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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10-27-2011 03:47 PM  6 years agoPost 3
shaiko

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Chicago, IL - US

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This doesn't answer my questions...

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10-27-2011 03:59 PM  6 years agoPost 4
shaiko

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Hi Ron,

Can you please answer my 2 questions as I asked them?
this would help me understand...

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10-27-2011 04:23 PM  6 years agoPost 5
ddavison

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Brownsville, Pennsylvania

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Bolt #3 only holds the head button on.
The axle floats in the dampeners, no rigid connection

DaveDavison,GasGob,WhiplashGas,Spectra,JRXG11MV,12X

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10-27-2011 05:20 PM  6 years agoPost 6
shaiko

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Chicago, IL - US

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Thanks ddavison,

Would your prefer a split spindle or a single spindle?

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10-27-2011 07:45 PM  6 years agoPost 7
rcflyerheli

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Granbury, TX USA

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In your diagram, item 14 is either the feathering shaft sleeve or the feathering shaft itself. All the Align heads (both FBL and FB) I have assembled have some sort of sleeve that centers the feathering shaft in the main head and then uses the dampers for rigidity. As has already been indicated bolt 3 does not touch the feathering shaft, all it does is hold the head button on.

Hope this adds some useful info.

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10-27-2011 10:00 PM  6 years agoPost 8
shaiko

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Chicago, IL - US

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That's what I also thought...

The reason I asked this is because I've seen a heli head with a different configuration...

In addition to the dampers, it has a polymer ball inside the main hub that the spindle slides through.

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10-28-2011 01:14 AM  6 years agoPost 9
rcflyerheli

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Granbury, TX USA

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Logically, I would think the polymer ball is the same function as the sleeve on the Align head, that is to just keep the spindle or feathering shaft centered inside the head block. The dampers that fit in the end of the head on each side make the system more or less rigid, depending on the hardness of the dampers. Their function damps out vibration from the blades to the main head and to the heli as well as makes the heli more or less responsive.

I have never seen a 2 blade system not have a full solid feathering shaft. When you get into multi bladed heads, they will have a separate feathering shaft for each blade, but I have not ever seen one in person. Is that possibly what you are referring to?

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10-28-2011 04:53 PM  6 years agoPost 10
shaiko

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Chicago, IL - US

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No...the one I've seen is a dual blade. not a multi...

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10-28-2011 05:52 PM  6 years agoPost 11
cudaboy_71

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sacramento, ca, u.s.

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1.Is there usually a rigid connection between the main hub and the
spindle (parts #1 and #14)? Does bolt #3 connect them?
no and no.
2.If there's no rigid connection between the spindle and the hub is the spindle fully floated and sits only on the dampers? Or the hub has some kind of a ball joint inside it that the spindle slides through?
floated, sitting on the dampers.

if it ain't broke, break it.

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10-28-2011 08:12 PM  6 years agoPost 12
Maxime30

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Quebec City, Canada

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If my memory is right, The Gaui 200 fbl head has no spindle. The grips are bolted directly to the main rotor hub.

Max

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10-29-2011 07:04 AM  6 years agoPost 13
shaiko

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Chicago, IL - US

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Thanks cudaboy_71

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10-29-2011 02:04 PM  6 years agoPost 14
cudaboy_71

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sacramento, ca, u.s.

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you're welcome.

if it ain't broke, break it.

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