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HelicopterCentury Radikal G20-30 N640 Hawk Predator › RADIKAL Tail Hub Loose - Check This!
12-30-2009 11:13 PM  7 years agoPost 61
crash n' burn99

rrApprentice

ottawa, canada

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I know who steve 500 is, we have all seen his posts befor, he is not new just hiding under a new name to come back and stir. He knows nowbody with a radical nor has he ever seen one.

Do proctologists chew there finger nails when there nervouse?

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12-30-2009 11:53 PM  7 years agoPost 62
curtgra

rrNovice

Corona, CA USA

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Guess I oughta chime in here since I opened this hornets nest.

Personally, I just thought there was too much slop in the shaft to hub clearance. The Spectra G uses two set screws (drawing 8C-1), and my Raptor uses two long set screws that drive into the shaft from each side of the hub. Never even touched that assy in about two years now...

All things considered, seems to me the purpose of the set screw (being one or two) serves two purposes; A) to hold the hub onto the shaft, and B) its the "drive pin" if you will, that drives the tail rotor. I don't think its alternative purpose was to be a "slop" taker upper. And if I ruined the purpose of the assy by adding that second screw intially seems to prove that maybe there is a little to much play in there. I didn't "misinterpet" the directions, I just thought I would add it for good measure. Seems for some reason NOT the thing to do...

All is good now with using some red loctite, one screw, and tightening it up real good. I do keep an eye on it after every flight.
So if she loosens up again, I'll get a replacement shaft and hub but till then I'll just go by the "if it ain't broke don't touch it" philosophy..

Besides, I thought the purpose of all of us relating our experiences here is what makes for a good quality heli. As with any new product that hits the market, we the consumers do the real testing, no matter how good a job the mfg's do in engineering and prelim testing. And if the end result is an even better heli, then I'll drink to that!!

This is an awesome heli right out of the box, and I've grown to like gassers better than nitro's (I'm not an electric guy anyway)..This Radikal will most likely end up my favorite machine in the stable!!

Anyone thats been following this thread or others thinking about getting a Radikal should go for it. As far as gassers go, this new 50 size machine comes #1 on cost, quality, and cost of replacement parts..

Cheers Everyone..

Can I try yours.............No, get your own!

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12-31-2009 12:09 AM  7 years agoPost 63
crash n' burn99

rrApprentice

ottawa, canada

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Good point, However if you have any more trouble with that tail hub, try the raven tail hub, it has been working perfect for me, I have never retightened it.

Do proctologists chew there finger nails when there nervouse?

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12-31-2009 05:18 AM  7 years agoPost 64
curtgra

rrNovice

Corona, CA USA

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CNB'99

I liked your metal tail setup in the pics you posted. Century seems to be out of stock for now. When they come in I think I'll order that metal set-up. Can't have too much alum.....I noticed that hub in your pics does not have one side machined flat, I like that.

Can I try yours.............No, get your own!

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12-31-2009 06:15 AM  7 years agoPost 65
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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if you have any more trouble with that tail hub, try the raven tail hub,
the raven hub is the same hub used on the radikal, as well as the swift, as well as the predator machines....every century heli 50 size and up uses the same hub that has been running flawless for eons.

go check the part numbers.

Shawn
Team Leisure-Tech
Team HelixRC

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12-31-2009 07:07 AM  7 years agoPost 66
curtgra

rrNovice

Corona, CA USA

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Your right about the part numbers. But now I'm more confused. If its been the same hub they've been using for eons, why does the Radikal hub have one side milled flat and CNB's Raven metal setup (shown in the pics) does not??? At least from the pics it look like it does not. And same part numbers??? Are they now mixing stock, or is this the newer version of hub??
What am I missing here...

Can I try yours.............No, get your own!

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12-31-2009 07:14 AM  7 years agoPost 67
curtgra

rrNovice

Corona, CA USA

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Ya, I just stared at the pics again, no flat on Raven hub. And CNB'99 even mentioned it doesn't. So it can't be the same part even though the part numbers claim it to be. Seems there may a p/n goof on Century's end. Different looking parts, same part number. Like I mentioned ealier, maybe new style? I don't know.
(Must mention I do not own any other Century helis, just going by pics and other advise here)

Can I try yours.............No, get your own!

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12-31-2009 02:38 PM  7 years agoPost 68
rbort

rrProfessor

Franklin, MA - USA

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Hub

Someone mentioned that they milled the hub flat on the Radikal to increase tail rotor throw.

I'm sure it was the same part number as the raven, they just reused it in the Radikal and then for some reason decided they needed more pitch there so they chopped a chunk off the side of it.

While that increases the pitch throw, it also reduced the contact area on the output shaft and weakened the assembly. Combined with heavy platic tail blades and a gasser with more vibrations than a nitro or an electric, the hub's chances of getting loose got increased.

Using a wider hub and losing some pitch, or using lighter tail blades and/or filling the gap solid with epoxy all help to prevent this from happening.

I don't think that machining these hubs changed, 1000's have been done for a while and Century just used existing stock to make the Radikal.

Anyway its been discussed enough, and all the solutions suggested so just fix it the way you want and go fly! Its not such a big deal.

-=>Raja.

MA 1005 Hanson 280, 4142 flts
Spectra 27 3DMax, 3210 flts
Whiplash V1 Hanson 300, 1440 flts
Whiplash V2 Hanson 300, 207 flts

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12-31-2009 06:46 PM  7 years agoPost 69
curtgra

rrNovice

Corona, CA USA

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Amen to that!!

Can I try yours.............No, get your own!

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12-31-2009 06:50 PM  7 years agoPost 70
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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if you mill a flat on the hub like i did, then dont use the metal slider, as you will get so much throw that the slider will pop out of the lever....a vertical uncontrolled pirouette into the ground taught me that one.

the metal slider gives plenty of throw.

Shawn
Team Leisure-Tech
Team HelixRC

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12-31-2009 07:00 PM  7 years agoPost 71
curtgra

rrNovice

Corona, CA USA

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Now thats interesting.

Ok, not to whip a dead horse but if I ordered p/n HW3098A, which would I receive in the mail? One with or without flat. I have the metal slider. I would just like the one CNB has just to make myself feel better thats all.

Can I try yours.............No, get your own!

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12-31-2009 08:01 PM  7 years agoPost 72
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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that is the one you should already have with your kit, being the same one i mentioned that is used on the 50-90-gassers. it does not have the flat, as far as i know, it is not offered.

here is a picture of a hub i modded myself on my mill to allow for more throw. i would only recommend this if you keep the plastic pitch slider.

Shawn
Team Leisure-Tech
Team HelixRC

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12-31-2009 08:20 PM  7 years agoPost 73
crash n' burn99

rrApprentice

ottawa, canada

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furiouse predator, the radical comes with a hub that is already milled flat on one side, I think he wants one that is not. Like mine, The one I used is an old spare hub I hade from my Hawk Days. It will never come loose or atleast I have never seen one come loose.

I think if you order the hawk or rraven or kinetic 50 hub, you will get one that is not milled flat.

Side note: With the aluminum slider, even with the non milled hub there is a crazy amount of throw, enough to pop the links out, so you must set it up mechanically so this cannot happen in flight.

I Run the ball on my tail servo 7-8 mm out from center, this does the job and allows the limits on the gyro to be set to maximum for best resolution.

By the way, Have a happy new year furiouse predator, if your having another funfly this year I would like to go. If you can let me know.

Do proctologists chew there finger nails when there nervouse?

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12-31-2009 08:57 PM  7 years agoPost 74
Furious Predator

rrProfessor

Kitchener, Ontario, Canada

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strange, the part numbers on the century site for the radikal and NX50 are the same. i wonder if they have made a change to them...

ah well.

happy new years to you guys too.

I should be able to make it to the Stetson fun fly again next year

Shawn
Team Leisure-Tech
Team HelixRC

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12-31-2009 09:20 PM  7 years agoPost 75
rkeith2

rrVeteran

Norco, CA

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Hope they are stronger than the Vibe 90


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01-01-2010 12:18 AM  7 years agoPost 76
Dilbeck

rrElite Veteran

Springdale Arkansas

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Ive been told that chasing TAIL is bad for you. Some of you seem to have tail problems and continue to chase it. (A joke to ease some frustrations).

Clint

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01-01-2010 01:25 AM  7 years agoPost 77
oldfart

rrProfessor

Vancouver, Canada

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LOL - you certainly would not want anyone to shave your hub if you were.

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01-01-2010 01:34 AM  7 years agoPost 78
Gearhead

rrMaster

Vt

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LOL

I have been chasing a funny sound in my tail, it sounds like "Headache got a Headache, Headache got a Headache"

Jim
Buzz Buzz Buzz

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HelicopterCentury Radikal G20-30 N640 Hawk Predator › RADIKAL Tail Hub Loose - Check This!
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