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Home✈️Aircraft🚁HelicopterBeginners Corner › T-rex 450 seesaw play
09-07-2006 01:02 PM  14 years ago
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Antlers

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UK

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T-rex 450 seesaw play
Hi

Having almost completed my first heli (450xl hde) but as yet not fired her up (and wont until I understand this problem) there is one question I have.

The seesaw has about 2-3 mm play along the flybar between the seesaw and the control arms (hope this makes sense) I cannot see any washers or spacers that must be fitted in the manual and the 4 seesaw end screws are as tight as can be?

I do not think this can be correct as the seesaw would be moving back and forth with every revolution of the rotor would it not?

I have other issues with canopy quality and no doubt more questions at a later date but for now any help on this would be most welcome.

Thanks in advance.
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09-07-2006 05:02 PM  14 years ago
wuzofoz

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Brisbane,Queensland- Australia

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i assume your talking about the Flybar Control Set.
2 / 3 mm is alot of play and i think you need to atleast reduce this to less then a 1 mm. i prefer no play but have heard a small amount is no problem.
if you have an XL kit then the ends are plastic and you could flex the ends in to remove the play. if yo do this then be careful to keep the flybar lengh on each side even.
if you have an SE or metal upgrade then you have to shim the play out. make sure you add the same size / number of shims to each side.
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09-07-2006 05:26 PM  14 years ago
Antlers

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Yes thats the part, its an XL so its plastic.
Thanks for the info I will have a closer look and see if I can add a couple of shims as I dont fancy bending the plastic in.
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09-11-2006 01:16 PM  14 years ago
gkoutsis

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Athens Greece

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Its normal. And its going to get even worse.

The heli does fly but it would be best to invest in a ball bearing seesaw.
George
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09-11-2006 04:49 PM  14 years ago
Antlers

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"The heli does fly but it would be best to invest in a ball bearing seesaw."

This T-rex is one with bearings (XL) but I do not know ones with ball bearings, are these the ali upgrade parts that are available and is it just a matter of replacing the flybar control set or would the seesaw need upgrading as well.

I was hoping to eventually fly it for a while and then upgrade some parts?
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09-11-2006 06:06 PM  14 years ago
gkoutsis

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Athens Greece

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Your current plastic seesaw doesn't have ball bearing. it has two bushes.

DEFINITELY get the alloy flybar cage. The little grub screws in the plastic strip so easy and cannot hold the flybar anymore.
George
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09-12-2006 08:49 AM  14 years ago
Antlers

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UK

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Thanks for the info George.
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