White bushings in 2010/2011 head

[bob00]

For those using the 2009 white rigid head bushings, do you still pin the spindle to the spindle seesaw with the 5mm grub screw (0140d)?

Thanks,
- Rob

[DT75]

I do.

[jointer]

I do not.

[Danny_Swe]

I do!!

[ZuvieleTeile]

I do after careful measuring the distances!

[bob00]

Thanks for the info guys.

[marcosp]

I do and am having a bobble at spool up and lower revs. Wasn't there when new. I was about to try not pin the spindle. I put new bushings and dampers yesterday and it is a little better, have new main shaft, spindle, the whole tail is brand new including TT and took the chance to put 3 bearings on it. It flies good anyway, but I don't like the bobble.

[Danny_Swe]

same here actually, I think yesterday was much more bobblier than before. Strange, will see in next flight (yesterday I made the spool up a little slower)

[ZuvieleTeile]

Got used to the bobble at spool-up.
She is dancing a quick step. . .

[mkovalcson]

So I guess the black dampers don't have a bobble since I've never seen it.

[Danny_Swe]

ZT: haha, quick step! well. The latest vbar software has option to change spool up speed so a few clicks there and the dance will be as near as lost I hope.

[ZuvieleTeile]

Originally Posted by mkovalcson

So I guess the black dampers don't have a bobble since I've never seen it.

There is some with the black bushings, when the blades are not straight and the pitch is not at zero on spool-up.
Occurs around 800 RpM.

[marcosp]

Mine does it with the whites and at whichever pitch. It's not a thing about blade centering, it happens well up until the head speed is almost 1300 or 1400, still a bit visible at 1500. The second TDR with black bushings almost doesn't do it.

I am afraid of having a bent hub or something, since everything else is straight and true, and specially since it wasn't there when new. Even the main shaft bearings were replaced 3 weeks ago. Could the hub bearings be wearing? I mean the ones that support the pivot ball.

[bob00]

Jan advises that the spindle should be pinned in the same way as with the black bushings. He also recommends using a black O-ring at the outside and a red O-ring at the inside for the white bushings.

Thanks for all responses.

[Danny_Swe]

Originally Posted by bob00

He also recommends using a black O-ring at the outside and a red O-ring at the inside for the white bushings.

but wasn't that just as a "standard setup" that will fit most. In the 2009 manual he writes about these three different combinations. I think "as stiff as you can have" is best, try black/black, fly at your lowest HS and if you have no vobble (or resonance in the canopy) then it should be good. That's what I think, maybe different if you do extreme FFF, don't know.

[bob00]

Ive got black/black installed now. Hope the weather will be nice this weekend.

[jointer]

Originally Posted by bob00

Jan advises that the spindle should be pinned in the same way as with the black bushings. He also recommends using a black O-ring at the outside and a red O-ring at the inside for the white bushings.

Thanks for all responses.

The first guide here, from someone who done it, was not to put the grub screw in and use black/black.
Working well for me, except sometimes resonation during first spoolup.

[helicraze]

White inserts, black and black oring, no set screw holding spindle

[mkovalcson]

So I'm finally ordering my crash parts from a little while ago.

I've added white bushings, red O-rings, frame stiffeners, and the heat resistant intermediate gear. I already have the Gauro motor mount.

I'm re-evaluating building up my second TDR later on in the year with a 4525 ultimate.
It seems to have most of the punch of a 4530 in a lighter form factor.

Am I missing anything?

[marcosp]

You are missing that you'll have an egg boiler too!!!

On the custom winding sub forum I read the Xera is cooler because it has air channels that help in refrigeration, so the better efficiency is a myth. However, it pulls the same power and comes down cooler. I like it a lot.