Trex 500 main hub on hurricane 550?

[sp00fman]

I dont like the narrow hub the hurricane has, and i can't find a FBL-head that works with 12mm thick blade roots together with a 8mm mainshaft.

I have a spare Trex500 center-hub i bought just to see if i could make it work instead of the Gaui part.
The extra width is a plus for me. It will space the grips further apart, but it is only adding a slight delta. The grips are actually too close together now and not lining up perfectly.

I want to use the stock plastic grips, but need to find a shaft and bearing combination to make it all work together.

I have not owned a trex500 and now finding out the strange way they put the head together with stepped feathering shafts and fs sleeve. I wonder what the benefits are of this design.

I have no additional parts except the hub. So would need a shaft and dampners, perhaps change the bearing size in the grips to accept a different diameter fs.


Anyone know a combination of parts that is close or would work fro me?

[PTcaflyer]

...how about X5 head parts....I have a Hybrid X5 Flybar head with stock 550 washout /arms/swash....I seem to remember other peeps using them for FBL

[sp00fman]

Its a shame X5 bits are so expensive. I got this RJX 500 FBL hub for $8.
The X5 does have a 6mm feathering shaft like the trex500, and uses and bigger bearings in the grips than the hurricane. So would need the grips also,

I thought for a moment the trex500 has a 8mm thick feathering shaft in the middle, but i was mistaken. seems to be 6mm

The X5 featheringshaft could bring me pretty close to fitting it. Ill try to fins some reasonable priced grips.

[PTcaflyer]

...All the ones I have are 8mm....All Flybar stuff though
The center hub is 34mm and 12mm bore for the feathering shaft
T Rex 500 feathering shaft is 6mm x 68mm between the thrust Brgs.

[SQRT(-2)]

Don't know how to help you, But if you can't get this to work the Stock FB head can be made FBL easily.


http://www.empirerc.com/fes-upper-sw...st-p-3981.html

Plus


http://www.empirerc.com/fes-main-gri...ps-p-3980.html

and you get a good FBL head with Gaui parts.

Sorry, for the US web sites, but I don't know of any local to you, but I assume you can find something like these near you.

[sp00fman]

Thanks, but I already have those parts fitted. It works but i found the stock hurricane hubs to bend easily, and new ones not spinning 100% true. The plastic hub ends are slightly flexible. Together with the silly small dampner O-rings and the way they are spaced so close together makes the whole assembly so flexible. If i grab both blades and rock them a bit they flex quite a bit. Making the pressure higher on the damponers fixes it a bit for one flight, than back to sloppy. Im afraid i start to deform things.
A lower hub will also make the heli look much better.

[PTcaflyer]

...You are welcome to any of the X5 head parts I have....Let me know

[sp00fman]

Sweet. Will do if i get stuck.

I'm going over several manuals of different brands. Logo500 maingrips might work, but will need an odd size 6x14x4 bearings set to get it to work.
RJX X-Tron 500 manual is next.

edit:
RJX has smaller grips.
Trex550 & 600 will need the 6x14x4 bearings.

[Jerrymac]

X4 rotor yoke with X5 grips might just do the trick.

[Mikej]

Originally Posted by Jerrymac

X4 rotor yoke with X5 grips might just do the trick.

Someone did that years ago - I can't remember his name now (aussie guy) should be inhere somewhere if you search ...

[sp00fman]

I read that thread. Together with the chopped down main mast topic it was sort of my inspiration. I have a Hurri425 with a 500 FBL head on it and its so nice, but the thicker 520mm blades wont fit the grips.

Getting all the X5/X4 parts would be for another months budget. Just got a nice metal tail suffs to sort out the problem that has been haunting this heli for over a year.
Tried about anything to get rid of the vibe: https://www.helifreak.com/showthread.php?t=557594

Im off for some tinkering on it now, Hope to get it ready for a test run tomorrow.