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HelicopterScale Model RC Helicopters › multi blade problems
08-13-2010 05:19 AM  7 years agoPost 1
binsonc

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houston tx usa

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hi guy i am putting a trex 600 in to a md500 fuse,i have align flybar less system and century 5 blade head and follower will it work or not.thanks.

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08-13-2010 10:45 AM  7 years agoPost 2
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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i see no reason why that shouldnt work. the align system works well and so does the century multi bladed heads

drive a rotary, fly a rotorcraft

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08-13-2010 01:35 PM  7 years agoPost 3
Rodan

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Prescott Valley, AZ

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The only thing that may be a problem, and I'm not sure 'cause I could never get the question answered, is that the Align FBL system, as far as I know, does not have a swash rotation feature. You would be stuck with a mechanical setup, which is not ideal on a 5 blade head. Other FBL systems allow you to electronically adjust the swash rotation making setup quite a bit easier.

Can someone please confirm whether the Align does or does not have this feature?

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08-13-2010 01:53 PM  7 years agoPost 4
iHover

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Berne , NY

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The 3G does not do the phasing. You will have to do the phasing mech.

You had me at Hover

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08-13-2010 02:28 PM  7 years agoPost 5
Rodan

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Prescott Valley, AZ

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Thanks! I didn't think the Align had that feature.

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08-13-2010 03:17 PM  7 years agoPost 6
iHover

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Berne , NY

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No problem, You can only expect so much in that price range. I'm going to use one on an upcoming project with a 4 bladed head. I'll be using the pnp head that has the phasing set via the link arm location. So its Mech. set.

You had me at Hover

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08-13-2010 07:40 PM  7 years agoPost 7
binsonc

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houston tx usa

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but the mechanic phasing put the control rod at an angle that it look like its going to pop out??

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08-13-2010 07:52 PM  7 years agoPost 8
Sidneyw

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Huntersville, NC

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but the mechanic phasing put the control rod at an angle that it look like its going to pop out??
Why the "look like" going to pop out impression? It won't.

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08-13-2010 11:19 PM  7 years agoPost 9
binsonc

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houston tx usa

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thanks guy for help,will give it a try this weekend.

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08-14-2010 12:19 AM  7 years agoPost 10
Daniel Reese

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Urbana OH

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without going into exhaustive detail, you can plug the aileron and elevator servos into different channels and achieve a nearly perfectly straight linkage between swash and bladegrips- mechanical phasing without having angled pushrods.

Besides looking like they're gonna "pop off", having that angle creates rotational torque on the swash that usually introduces some measure of "slop" in the controls. Having the pushrods straight (vertical) makes the direct linkage work more efficiently.

With that technique (Thanks Super Hornet) you dont need any electrical gizmos to set things right and with a 600 sized bird it's stable enough you dont really need any electronic stabilization either!

A win-win situation for us budget minded nerds! LOL

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08-14-2010 01:32 AM  7 years agoPost 11
iHover

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Berne , NY

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Daniel,
Will that work for a 5 bladed head? the phasing on a 5 bladed head is around 45 deg. Not the 90 deg. like a 2 bladed head.

You had me at Hover

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08-14-2010 02:15 AM  7 years agoPost 12
Daniel Reese

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Urbana OH

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did it (doing it) with a TRex450 & 5-blade head and with a TRex600E & 5-blade head.

I've set them both for Clockwise rotation (advancing blade on the right side) to replicate the real thing. (if you've kept the standard RC rotation (clocwise with the advancing blade on the left) then what Im about to say will be "reversed" for you (confused yet? just wait!)

the front left servo becomes "Elevator", the front right servo becomes "Left Aileron" and the rear servo becomes "Right Aileron". Now, when you give "forward cyclic" the swash actually tilts toward the right front. Now, starting with the pitch links at "90*" you only need to adjust them about 3* to get the phasing lined up perfectly. Make what small adjustments you need so that with the advancing blade at the 3 o'clock position, give "forward cyclic" and the blade should decrease pitch. To confirm you've got it right, move the blade to the 12 o'clock position and give "forward cyclic" again- it should not move.

Ok, so if your heli is still rotating in RC direction then the left servo becomes right aileron, right servo becomes elevator and rear servo becomes left aileron (I think LOL). With your advancing blade at 9 o'clock, give forward cyclic and it should decrease pitch, move it to 12 o'clock and give forward cyclic again and it shouldnt move.

As akward as it sounds, this works REALLY well.

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08-14-2010 04:23 AM  7 years agoPost 13
Copter Doctor

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Enterprise/ft.rucker ,al- home of army aviation

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Daniel is correct. i have been phasing the last few heads that way. basically, you are reassigning the servos to get the phasing correct. this way, your rods are vertical and you dont have to use any mixing in the radio. you are rotating the input to the swash for phasing. works very well.

drive a rotary, fly a rotorcraft

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