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HelicopterHIROBOOther › Are there wider sets of skids for an X-spec ?
01-23-2007 11:33 PM  10 years agoPost 1
Rod H

rrApprentice

Gold Coast Queensland Australia

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I find that my Hirobo X-Spec 90 is very unstable on the ground . With such a high mast and only 200mm (8" wide skids it gets a wobble up very easily and I have now had 2 cases of dynamic rollover . Dynamic Rollover post at # (http://www.runryder.com/helicopter/t315758p1/) I feel that a wider set of skids might be of a great help .
Any thoughts or suggestions ?
Rod H

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01-23-2007 11:46 PM  10 years agoPost 2
ErichF

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Sutton, NH

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How bout you tighten up them blades a little bit more. That, and don't gun the throttle so bad on spool up.

I fly my X-Specs off pavement regularly, and have no idea what your talking about.

If you still have a need to spend money, people use the MA Tuff Struts (training wheels) with success.

I'm not trying to be a dick...it just came naturally in this case

Erich

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01-24-2007 12:20 AM  10 years agoPost 3
UCGC

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Colorado

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Not sure which MA Tufstrutts but they are wider. I believe the Quick UK skids are wider too.

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01-24-2007 02:40 AM  10 years agoPost 4
Rod H

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Gold Coast Queensland Australia

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Erichf

The blades are correctly tightened according to one of this countries top flyers so thats not a problem . A slower spool up will certainly help thats for sure . Where I fly is a grass area with a grass strip so the surface is not all that level nor smooth in places and sometimes the heli is on a slight sideways slope and the skid can get stuck in some grass runners very easily which I now realise is not a good thing . You probably would not see Dynamic Rollover as you fly off a sealed surface but if you follow the link I included in this post to the post in " main discussion " and have a look at the Dynamic Rollover link you will understand what I am talking about .
I will look into the " quick " skids and see how that goes or maybe make some up myself .
Rod H

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01-24-2007 02:54 AM  10 years agoPost 5
ErichF

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Sutton, NH

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I's just messing with you, man...

I prefer to fly off carpet on grass. Clean and resonant absorbent.

The paved runway I use only once in a while (too dirty).

I usually take a good 30 seconds to spool up my system, easier on the clutch and drive train. Flying the Hirobo, so I'm sure you've read about the one-way bearing issues with them.

Erich

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01-24-2007 03:47 AM  10 years agoPost 6
marc8090

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Long Island, N.Y.

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The Miniature Aircraft tuff struts are wider than the Hirobo gear. You will need to redrill the holes though, but this is easily done. They also help the heli from tipping over as much in the car.

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01-24-2007 04:37 AM  10 years agoPost 7
MEDFLIGHT

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South Webster, Ohio

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I fly off rough grass and use that same gear on ever heli I have owned and never had a problem. I go to half stick on the throttle as quick as I can without the heli wanting to spin. At that point it's pretty stable and doesnt' wobble or want to tip.

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01-24-2007 04:38 PM  10 years agoPost 8
Brian C

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Houston, TX

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A lot of Freya owners went back to the original tall black gear the Freya originally came with, both taller and wider, P/N 404205.
Brian

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01-24-2007 08:01 PM  10 years agoPost 9
Rod H

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Gold Coast Queensland Australia

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ErichF

I am not aware of the one way bearing issue so can you let me know about it please .
Thanks
RodH

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01-24-2007 11:01 PM  10 years agoPost 10
ErichF

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Sutton, NH

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Here's my experience with the issue:

http://runryder.com/helicopter/t248465p1

Erich

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01-25-2007 01:06 PM  10 years agoPost 11
Brian C

rrNovice

Houston, TX

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Hirobo one way bearing fix
I seem to have solved my bearing slipping/cracking issue. I found the old bearing and the new style bearing both to be equally short lived. I have always run the aluminum upgrade hub rather than the plastic stock one. I tried opening the hub up some to let the bearing float a little, no help. Tried the grease mod, made it worse.
Tried all kinds of oils and greases to lube the bearing, none were any better than any other as far as I could tell.
I finally fixed it by cleaning up both the hub and bearing, applying a light coat of grease to the bearing outside and slip it in the hub. Now fill the small voids between the bearing and the hub with JB Weld. You have to be careful here and just fill the gaps, do not get any JB Weld past the ends of the bearing. I let my drive gear assembly cure overnight installed on a main shaft preloaded in the driving direction so the bearing locks on the shaft and centers itself. The bearing will be tight and not move, no problem, install and go fly a couple of gallons. When you take the assembly back out, the bearing will slide out. The problem with the design is the areas of stress on the bearing are not supported, by filling in the gaps, you just added support at the stress areas.
Brian C

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01-25-2007 05:49 PM  10 years agoPost 12
57NOMAD

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La Palma, Calif.

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Brian C

That was a real winner idea about tha jb weld. I have personally tried to analize whare the fault is on the one way and the hub and my findings were the same as yours, the high stress area on bearing in unsupported, never got around to figuring out how to fix it. The jb weld did come to mind but never got around to it. Good to know that you've done the mod. with success, GOOD JOB!

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01-25-2007 06:05 PM  10 years agoPost 13
ErichF

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Sutton, NH

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Yes, I have a buddy here that used JB weld, and he's a maniac with the collective. The bearing and hub on his Evo 90 are still holding up after quite a few gallons.

Erich

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01-25-2007 06:12 PM  10 years agoPost 14
57NOMAD

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La Palma, Calif.

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Erich,
I clicked on the link that you posted re. the oneway brng. You mentioned that you'll be logging flight times on both birds, how is that coming along? What are your findings?

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01-25-2007 11:28 PM  10 years agoPost 15
ErichF

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Sutton, NH

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Heh, I gave up logging, it's been so long. The contest bird, with the E3 upgraded hub probably has three times the flight time as my 3D bird, which has the std X-Spec aluminum hub. Both got bearing replacements at the same time.

If I were to guess, I have about 12 cases of fuel through my contest bird, and 4 or so through the 3D bird since the bearing/hub changes.

As a matter of fact, I haven't done any major maintenance actions on either of the X-Specs in the past 11 months. These birds just hum away contently

Erich

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01-25-2007 11:50 PM  10 years agoPost 16
Professor Fate

rrKey Veteran

Goose Creek S.C.

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The Quick UK heavy duty 60 skids are 9.5"/241mm wide

Welcome my son, Welcome to the machine

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HelicopterHIROBOOther › Are there wider sets of skids for an X-spec ?
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