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12-16-2003 09:20 PM  13 years agoPost 1
Toolman

rrApprentice

London

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I am building a Hornet Collective pitch version, and am puzzled as what
holds the 3 damping O-rings in place?
I was thinking of using a few drops of cyano.

Does anyone have any experience of them falling out?

Thanks in advance.

Tim.

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12-16-2003 09:28 PM  13 years agoPost 2
Mr_Magoo

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Nevada

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I use an extra micro hitec servo horn (the 4 armed one). I cut off the 4 arms and drill the screw hole to friction fit on mainshaft. Push the servo horn to bottom of headblock and o-rings stay in place. There are other solutions to this problem that also work fine.

Magoo

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12-16-2003 10:17 PM  13 years agoPost 3
Toolman

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London

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Hi Magoo,

Did you your O-rings actually fallout first, or did you fit the servo horn from day one?

Tim.

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12-16-2003 10:33 PM  13 years agoPost 4
jeff1

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Ottawa, Ontario, Canada

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They are held in place with friction. I've been flying a hornet for a couple of years yow and have never heard of them falling out. Definately don't use CA. This will remove all the dampening that the o-rings are designed for.

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12-16-2003 11:47 PM  13 years agoPost 5
Mr_Magoo

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Nevada

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They fell out.

You can search the Hornet BBS link I've given. We aren't the only ones to have them fall out.

http://www.hornet-heli.com/cgi-bin/bbs/ultimatebb.cgi

Magoo

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12-17-2003 11:40 PM  13 years agoPost 6
Toolman

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London

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Been trawling the BBS's for info on this problem
To summarise what I found out: -

1. They are supposed to stay in by friction.
2. Instructions suggest using soap to help get them in, Soap evaporates in a few hours & is OK, Any sort of oil is a No No!
Note: - Mine however were quite loose & just slipped in however, I'm using a HelliHobby Super-Head Head block & Stabiliser Arm which could have a deeper grove?
3. They can come out & Yes it fly's crap with 2 or less o-rings.
4. Some people have had success degreasing the head parts before fitting the o-ring to aid the friction.
5. DeeTee Enterprises Super Head uses fuel tubing instead of the o-rings above & below the pin. This seems like a good idea actually, though a bit hit & miss to find just the right stiffness.

Have I missed anything?

My current Plan is to get the feel of the Hornet with the o-rings & then experiment replacing them with fuel tubing.

I looked at the servo arm collar idea, trouble is as the head block sways it pushes the collar down slightly.

Tim.

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12-18-2003 02:35 AM  13 years agoPost 7
Rhytalin

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Westminster MD.

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A little silicone should hold them in with out interfering with the dampening.

Mine slipped in easily but a small dab of silicone should keep them were they belong.

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12-18-2003 04:12 AM  13 years agoPost 8
Mr_Magoo

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Nevada

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trouble is as the head block sways it pushes the collar down slightly.
I have the standard headblock. The servo arm collar almost touches the pivoting headblock (but it doesn't touch). The collar doesn't inhibit the flapping of the head. I've used it for over a year. The o-rings stay in place. Maybe your aluminum head block is taller than the stock one.

Magoo

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12-18-2003 04:07 PM  13 years agoPost 9
mattijs

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Keerbergen Belgium

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My third one is always coming out so i stopped bothering...It now lays on the swash waiting to be put back. I am only flying heli's for a week now so I don't think I can honeslty say that you don't notice the difference. I don't atleast. Also the mainblade grips aren't held stiff in equal amounts so my blades ARE tracked at 0 pitch but in a hover there is about 0.5 cm of distance between the loose blade and the fixed blade. That also doesn't bother it's capability of being very easy to hover and do some small FF's but it might compromise the duration so i'll have to look into that.

I think there are alot of people over estimating what it takes to make a hornet fly. Mine is heavy, out of track, misses an o ring , servo's are mounted in a way that there seems to be a considerable amount of aileron and elevon pitch coupling and still i find it very easy to hover it and make it completely still in the air AND I AM A HELI NOOB FLYING FOR ONLY 1 WEEK !

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