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HIROBO Turbulence - SDX - Freya - Sceadu > Hirobo SDX 0412-306 question ?

Alpine
Veteran
Location: Lexington, Ky

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Is the SDX auto-rotation drive shaft suppose to be a two piece assy ?

Roberto.

Roberto Munoz
IRCHA #344

11-07-2009 01:40 AM

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S76 Mech
Elite Veteran
Location: Hatboro, Pa.

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I don't believe so. Did the top piece (looks like a hat) seperate from the shaft? Got pics?

Rick Cotte
Team MRC Hirobo

11-07-2009 02:27 AM

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Lewd Skywalker
Senior Heliman
Location: Manila, Philippines

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I got one of the first release SDXs and mine is 2-piece assembly unlike those from the Sceadu. And yes the top piece looks like a hat.

Team Hirobo | Futaba | Cosmo
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11-07-2009 04:45 AM

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Alpine
Veteran
Location: Lexington, Ky

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So the piece comes apart .Never had that in the sceadus or freyas . I had played on the main gear and decided to order a new shaft assy thinking it was brokenned . Well, the second one had the hat come loose , I was advised to use more of the thin washers (the ones next to the big brass spacer ) to adjust the play . How much play do you all have when you move the main gear up and down ? and yes, the collar is well adjusted on the mainshaft .
Thanks,
Roberto.

Roberto Munoz
IRCHA #344

11-07-2009 02:05 PM

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S76 Mech
Elite Veteran
Location: Hatboro, Pa.

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Robert, I'll have to double check but I thought that it was a one piece unit. The area were the (hat) connects to the drive shaft is really thin. I thought when I removed mine for the first time that it had broke and seperated.

I have just reinstalled it on the shaft and ran it like that with no problems. As far as the play goes, I had none. By leaving the mainshaft locking collar loose, pulling up on the rotor head, then tightening the locking collar, you should elimate the up/down play. The parts breakdown shows it as a one-piece unit. I'll double check for you though.

Rick Cotte
Team MRC Hirobo

11-07-2009 03:38 PM

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S76 Mech
Elite Veteran
Location: Hatboro, Pa.

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one-piece

Found a pic of it.

http://www.heliproz.com/prodinfo.asp?number=412306

Rick Cotte
Team MRC Hirobo

11-07-2009 03:44 PM

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Alpine
Veteran
Location: Lexington, Ky

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I am not talking about play pulling the head up and down , the collar has ben properly adjusted , but when you hold the main gear and push-pull up and down there is more than a mm vertical play on the auto assy . I took my auto assy out after a half a tank and my new auto shaft came out in two pieces so I assume that is the way they are now- Two pieces - I spoke to Greg about this and he suggested adding washers to take up the slack . I just wanted to know what other flyers have in their machines as I have yet to find this in any other Hirobo heli I have owned . My Turbulance barely has any play a all .
Thanks for all the replies,
Roberto.

Roberto Munoz
IRCHA #344

11-07-2009 10:57 PM

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S76 Mech
Elite Veteran
Location: Hatboro, Pa.

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Im running the sprague so I can't comment on the assy play, as I remember though, there was a little.

Rick Cotte
Team MRC Hirobo

11-07-2009 11:22 PM

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Lewd Skywalker
Senior Heliman
Location: Manila, Philippines

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Wow. And I thought it was 2-piece all along when I assembled mine. So probably I had 2 broken piece when I got my kit

Anyway, I don't have problems with the 2-pc now. I don't have slack and up/down play as I pull on the head and tighten the collar on the shaft.

Would the piece from the Sceadu unit fit?

Team Hirobo | Futaba | Cosmo
facebook: lbllanora@yahoo.com

11-08-2009 01:09 PM

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rexxigpilot
Key Veteran
Location: florida

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Mine is two piece. Correct me if I'm wrong, but isn't the top part a brass bushing/spacer that press fits over the steel auto-rotation drive sleeve. When I changed to the Delrin main gear I just pressed the bushing back on and all was good.

I have no detectable up and down play in my main gear.

11-08-2009 04:10 PM

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Tomas Ahl
Senior Heliman
Location: Linköping, Sweden

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I have had at least one on a Sceadu come apart at the flanged end. I think it is made as two pieces but supposed to be handled as one piece by us users.

11-08-2009 05:46 PM

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Alpine
Veteran
Location: Lexington, Ky

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It is definitivelly a two piece as I have learned in the SDX . I guess the gap should be OK but as I have extra washers coming I will shim for the gap .

Roberto.

Roberto Munoz
IRCHA #344

11-09-2009 12:25 AM

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Alpine
Veteran
Location: Lexington, Ky

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Added one washer to assy now is just about perfect . No play .

Roberto.

Roberto Munoz
IRCHA #344

11-17-2009 01:59 PM

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HIROBO Turbulence - SDX - Freya - Sceadu > Hirobo SDX 0412-306 question ?

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