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HelicopterMain Discussion › Auto Hub nearly cost me my heli
10-07-2005 04:48 PM  12 years agoPost 1
Yug

rrMaster

UK. Herts

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Yesterday, I was practising some tic tocs when the engine just died. Unfortunately, my new auto hub was again locked so by the time I got it horizontal, the blades had nearly stopped. I suppose that was an advantage because it allowed the clutch to disengage which in turn allowed me to get some head speed and auto down by the skin of my teeth. The engine stopped cos of a split clunk, this was only replaced 3 months ago !.
Anyhow, never mind all that, I have now tried every possible form of lubrication (& none) on the hub and have tried several hubs, and it ALLWAYS locks up. I have only used TT hubs so far. Does anyone know of any other hubs I could use ? It is a shame the new one from QuickUK is only for the 90. I'm looking for one for the R50.

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10-07-2005 04:58 PM  12 years agoPost 2
Wa11banger

rrElite Veteran

Huntsville, Al

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Guy,
First off good save... Glad your heli survived! Secondly I replace my clunk lines every 90 days regardless. I use the hayes black neoprene lines and they are usually still very healthy at 90 days but its a habbit I got into when using the standard stuff. I use a program called Flight Log to automatically keep track of when I need to change them on all the models.. Now for the good news... QUK is looking into making a 50 sized one as well.. Nothing concrete yet but it is being discussed, and will probably be available in the near future as much as it has been talked about

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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10-07-2005 05:11 PM  12 years agoPost 3
Yug

rrMaster

UK. Herts

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Splendid news. Any idea of timescales ?
Actually, I'l give them a ring right now.
I'm trying a different clunk line now. It has a slightly larger bore and I didn't have to strain to get it over the clunk and inlet nipple whatnot. Wouldn't it be nice not to pressurise the tanks with those nasty exhaust gasses.

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10-07-2005 05:22 PM  12 years agoPost 4
Wa11banger

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Huntsville, Al

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Wouldn't it be nice not to pressurise the tanks with those nasty exhaust gasses.
HEHE I don't I run YS 91's or OS pumped... no exhaust gasses in my fuel tanks

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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10-07-2005 05:32 PM  12 years agoPost 5
Yug

rrMaster

UK. Herts

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I don't know what make it WAS, it was just clunk line from a local model shop. I'll give this new one a run and see, I think its some sort of surgical quality silicone.
Can't wait for the QUK hub.

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10-07-2005 05:57 PM  12 years agoPost 6
damaen

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Umeå, Sweden

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the blades had nearly stopped. I suppose that was an advantage because it allowed the clutch to disengage
Huh??

Henrik

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10-07-2005 06:08 PM  12 years agoPost 7
Yug

rrMaster

UK. Herts

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Well, it was vertical when the engine died so because the auto hub didn't work, the combination of the engine bogging down the blades and me trying to get the thing horizontal, bled all the head speed off.
With such a low rpm, the clutch could release.

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10-07-2005 07:07 PM  12 years agoPost 8
MicroDOC

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Goleta, CA

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I've had problems with my auto hub locking up as well. I have found that a little TriFlow on the bearing and working the hub freed it up. I've gotton into the habit of checking it before a flight, but I'd also like to see a better hub. It seems that those pilots that do a lot of autos don't have the problem. Guess that's the solution for keeping it freed up.

Experience is something you don't get until just after you need it!

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10-07-2005 07:17 PM  12 years agoPost 9
Wa11banger

rrElite Veteran

Huntsville, Al

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I do alot of autos with my 90 birds... I end every flight with no less than 3, I can lock one up on command now and it seems to matter not whether the bolt is loose tight, clamp on, clamp off, etc etc etc... It has everything to do with brute force lol...

One easy way is to have a TJ, YS 91 tuned well, and a liquid fast Throttle servo... Go into throttle hold get HS low and bail out.. bam locked autohub almost everytime. another way is same setup doing hard tic tocs with poor collective management (such as me). The TJ kicks in gear so hard and the 91's have so much power it almost a guaranteed lock up for me anyway. I should be receiving one of the proto type QUK auto hubs today or early next week and after updating the boss about its characteristics will be able to post some of my findings

Rick

Proud member of the Quick UK, Duralite Flight Systems, V-Blade, & KBDD team

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10-07-2005 07:21 PM  12 years agoPost 10
Real Raptors

rrApprentice

UK

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Quick Uk are going to look at the R50 auto unit, but not this side of christmas, this is due to the R90 hub being a lot easier to put togeather, the new unit is larger/wider than the TT one so the new one way bearings can be used.

But with the R50 auto unit there is no room to make a larger unit due to the white auto gear sliding over the auto unit, so if Quick do it, it means machining a new auto unit and white auto gear, a lot more work than the R90 one

Andy

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10-07-2005 10:52 PM  12 years agoPost 11
Yug

rrMaster

UK. Herts

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This is nearly funny. My 90 hub as been OK until today. Its now locked up. I think it must have been aware of this thread a needed to join in the debate.
Come on QuickUK, we're all getting short of auto practice.


Wa11banger
I agree with you. As soon as you start putting plenty of load through the hub, it locks godd and solid. It is interesting in that my old R50 only has an OS50SXH and dosent deliver anywhere near the power of the Hyper and certainly the Cspec. The hub on this R50 is still nice and free - kind of makes sence doesn't it.

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10-07-2005 11:08 PM  12 years agoPost 12
MicroDOC

rrVeteran

Goleta, CA

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Guess that's just another reason for holding off on my getting a 90. Think I'll stay with the 50 til things get worked out. I'd kind of like to stay with TT because of the availability and price of parts. I've plenty of spares for the 50 and Murphy says you'll never need a part that you have or is readily available.
Ron…

Experience is something you don't get until just after you need it!

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10-08-2005 12:53 AM  12 years agoPost 13
Yug

rrMaster

UK. Herts

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MicroDOC

Funny that; I have loads of raptor spares and I bet that when I get round to putting my next heli together, a 600e, I will get all new parts plus extras.

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HelicopterMain Discussion › Auto Hub nearly cost me my heli
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