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Old Dec 27, 2009, 06:15 AM
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Greece, Attica, Piraeus
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Hi.
I will take some pictures this afternoon.
I am trying to repair the motor pod right now by gluing it with epoxy and tiny pieces of glass cloth.
I don't have enough spare time in order to make a custom motor mount right now so i hope i can repair this one.
The rear ball bearing plastic mount has an opening on the bottom side where the plastic pod mound is located and there is not enough material to hold it
in case something goes wrong.
I am thinking that it should be beefier like the front is.
When it brakes the torque generated will also brakes the front pod mount as the motor pod will rotate on the front mount.
Chris
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Old Dec 27, 2009, 06:18 AM
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Romania, Dolj, Craiova
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If the plastic is ABS, then the best you can use is UHU hart !
Will melt it superficially, and then will fast as a single piece, almost as before.
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Old Dec 27, 2009, 06:26 AM
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Greece, Attica, Piraeus
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Quote:
I wouldn't reinforce it so heavily with something strong. The effect would be exactly the same as before, the foam and plastic will crash against the glass instead of ground !
You are right about this and it also adds weight.
I am still thinking.
What i have done in my other wings (experimentally) was to add foam in the nose like you said
and to add 6mm carbon tubes with padding at the exposed end that project about 3cm out of the leading edge where the wing ends (imagine pitot tubes with a spring and heat shrink).
This way the nose takes the impact and the carbon tube does not let the wing leading edge to come in contact with the ground heavily.
I assure you that this works miracles but it is dangerous if you hit something
Chris
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Old Dec 27, 2009, 11:06 AM
No such thing as overpowered
Wilit run? 353's Avatar
Suffolk, England
Joined Sep 2008
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I have never like UHU hart. UHU por on the other hand is fantastic! and that is what i would use for the Xeno
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Old Dec 27, 2009, 12:06 PM
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Hi.
I just finished repairing the motor pod. i used 1 hour epoxy and micro balloons for the rear part and some glass cloth for the front as it has more area.
It looks like it is going to hold so tomorrow i will get me another Xeno.
For the glass i didn't used laminating epoxy but thin cyano instead.
It has great strength and it is lighter.
Chris
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Old Dec 27, 2009, 12:50 PM
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I think i found what i will do.
I will drill a couple holes deep in to each wings nose close and parallel to the center plastic piece and insert two carbon tubes that will protrude about 2cm from the wing and another two near the wing end.
Then i will fit tough rubber of about 1,5 inches long on the outside of the tubes thus creating a bumper
This way the carbon tubes will not get damaged and the rubber will take the shock ( i hope).
First i will try creating a fake nose with spare elapor (i have plenty of that from the deceased Xeno and if this does not look good enough then i will proceed to the carbon tube plan.
Maybe Multiplex should make spare nose protectors as well!
Chris
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Old Dec 27, 2009, 10:57 PM
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Quote:
Originally Posted by austin13 View Post
How do you launch yours ? Do you turn the power on once it has been thrown in order to keep your five fingers ?
See: http://www.rcgroups.com/forums/showp...&postcount=166

Jürgen
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Old Dec 27, 2009, 11:00 PM
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Quote:
Originally Posted by RENATOA View Post
If the plastic is ABS, then the best you can use is UHU hart !
Will melt it superficially, and then will fast as a single piece, almost as before.
A part repaired with UHU Hart would be much weaker than originally. Depending how the part is broken, you could use CA plus some glasscloth soaked with CA.

Jürgen
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Last edited by Jurgen Heilig; Dec 28, 2009 at 02:15 AM.
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Old Dec 27, 2009, 11:55 PM
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Quote:
Originally Posted by Jurgen Heilig View Post
A part repaired with UHU Hart would be much weaker than originally. Dependending how the part is broken, you could use CA plus some glasscloth soaked with CA.

Jürgen
Then, is not ABS... I repaired true ABS with UHU Hart and it broke other place, near the splice.
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Old Dec 28, 2009, 01:55 AM
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Greece, Attica, Piraeus
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Then, is not ABS... I repaired true ABS with UHU Hart and it broke other place, near the splice.
If it broke near very near the splice then it is the weakening of the material that did this.
It is like when we weld metals, usually they brake just before or after the weld, never on the welding point due to material weakening.
Guys i need to ask the more experienced from me about glue.
Is it ok to glue the center plastic piece with the wing using UHU POR?
I think cyano does not give me enough time for a perfect fit and i must admit that i am a perfection maniac (that's why i didn't repaired the previous Xeno)
Chris
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Old Dec 28, 2009, 01:59 AM
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My club fellows call my plane Frankenplane, so I can't give any advice to "maniacs"
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Old Dec 28, 2009, 02:10 AM
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Greece, Attica, Piraeus
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Well everyone is different, i never laugh at other people's airplanes or anything
else.
If they like it or it is good enough for them then it is fine with me as well.
I can and will only judge my planes.
In fact i am jealous that i can't do the same and have to live with scratch looking creatures chasing me and torturing my mind even when i go to sleep
Chris
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Old Dec 28, 2009, 02:12 AM
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Quote:
Originally Posted by hendrix View Post
...
Is it ok to glue the center plastic piece with the wing using UHU POR?
I think cyano does not give me enough time for a perfect fit and i must admit that i am a perfection maniac (that's why i didn't repaired the previous Xeno)
Chris
I would not use UHU Por for this job. If you follow the instructions, they tell you to do a temp fit without glue, until you are happy with it. You may even need to squeeze the foam wings a bit. You also only put CA to the vertical surfaces of the wing panels, i.e. the CA should only come into contact with the plastic part, when completely inserted. The rest is done with thin CA using capillary effects to get between parts.

That being said, I used a mix of Beli-Zell and CA on my Xeno.

Jürgen
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Old Dec 28, 2009, 02:17 AM
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Jurgen where do you put the CA on the wing's center section?
Quote:
You also only put CA to the vertical surfaces of the wing panels, i.e. the CA should only come into contact with the plastic part, when completely inserted.
Can you elaborate on this because this is where i overdid it the first time.
I did managed to make a perfect fit the first time by first doing a test fit as you said, it is just that i would like some more time.
Chris
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Old Dec 28, 2009, 05:53 AM
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Quote:
Originally Posted by hendrix View Post
Jurgen where do you put the CA on the wing's center section?
...
Hi Chris,

have a look in the instruction manual: Abb. 5

Apply Zacki Elapor to the root face of both wings panels, then push the wings together firmly and briskly, pressing them fully home into the root ribs of the cradle.

Jürgen
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