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Post by thenameisdame on Dec 24, 2012 17:27:39 GMT 1
i bought this plane from someone, and he glued it back together looks like with some kinda hypoxy.. i also then personaly tryied to jam medium super glue inside everywhere i could.. is there anything else someone can suggest to make this as strong as possible?   and also is the gap between the wing and the cockpit area ok or should i try and fix that.. right now the elastic is pulling the wing back..  |
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Post by spindeepster on Dec 24, 2012 18:27:21 GMT 1
The broken tail section is a common result of a crash. Epoxy works wonders and the fix shown might be all you need. I broke mine the exact same way and it is holding up nicely. Concerning the wing gap, and more helpful advice, watch this: www.youtube.com/watch?v=9eA-RhCIkkQ |
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Post by mebillica on Dec 25, 2012 18:14:37 GMT 1
I find that a low temp glue gun works the best on all types of foam!
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Post by mebillica on Dec 25, 2012 18:21:07 GMT 1
I just bought this UMX Micro cub ss that someone destroyed. Fuselage was broken in 2 spots, canopy cracked, nose in 30 pieces, and the wing had a big crack in the middle. Low-Temp glue gun to the rescue! May not look pretty, but it's back up and flying great! $16 plus $.14 for 2 glue sticks, and I have a $170 micro cub with Aileron's and flaps! Attachments:
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Post by mebillica on Dec 25, 2012 18:23:57 GMT 1
Also, be weary of where the center of gravity is. adding glue and other weight may change it, which could change the flying characteristics.
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Post by thenameisdame on Dec 27, 2012 6:09:11 GMT 1
how to i rebalence it after wards?
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Post by spindeepster on Dec 27, 2012 10:37:31 GMT 1
thenameisdame,
At this point in the tail repair, your center of gravity(COG) should not be an issue. As mebillica points out, adding anything to the tail will alter the COG so you have to be cautious. Glue, packing tape, paint all have weight, and odd as it may sound, even small amounts will effect flight characteristics . I think your glue-up of the tail is sufficient...it worked well on mine. I think mebillica's advice is that you don't "overkill" it with un-necessary additional weight.
The short answer to your question would be to tape coins inside the cowl to counterbalance any additional weight added to the tail....but I don't advise that unless it is absolutely necessary.
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Post by mebillica on Dec 28, 2012 0:09:30 GMT 1
Yeah, just don't over do it. You should be fine. For a quick check, hold the plane by the outter most tips of the wing. The fuselage should be level. I know that is not the proper way, but as a quick check it always works for me. Some research on these forums will give you the correct COG and how to check it.
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Post by renard80 on Dec 28, 2012 0:19:22 GMT 1
It is generally accepted that the CoG is 2.25" back from the leading edge of the wing. Here is a very informative video from the excellent series by 'neflyer'. www.youtube.com/watch?v=kq2VeC9-n9QHe uses a special jig made from a wire coat hanger. But balancing it on your two index fingers should be adequate. Aim to get your plane parallel to the ground, or slightly nose down. Tail down is not good. |
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Post by thenameisdame on Jan 3, 2013 6:07:58 GMT 1
also
can someone please tell me how the tail would normaly break?
so i can avoid it happening again.
kinda boggles my mind
thanks
dame
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Post by spindeepster on Jan 3, 2013 15:05:56 GMT 1
I broke mine when I hit my truck broadside (don't ask). Seems that the weight of the tail assembly is just enough to send it into the direction of impact. Because the fuse is at it's thinnest point just in front of the tail section, this makes it prone to break. I also broke my prop, gear box, and cowl in this particular crash.
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Post by flydiver on Jan 3, 2013 17:00:00 GMT 1
The most common method (there are some creative ways as above) is flying + landing in too much wind. The plane catches a wing landing while still traveling pretty fast and cartwheels.
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Post by renard80 on Jan 4, 2013 0:05:45 GMT 1
It's worth beefing up that narrow section of fuselage near the tail.
I use lengths of carbon fibre rod, which are very light yet strong. Carefully push them through from the tail end.
An alternative is to glue lightweight wooden strengtheners on either side.
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Post by toff on Jan 7, 2013 23:59:12 GMT 1
For this sort of repair, carbon rods are for rich people, Use BBQ skewers to reinforce the weak areas.
Cover them in 5 min epoxy, and push through the foam in equal lengths, then trim off.
There is no real way the 'bullet proof' your plane, which is what I think you are asking for, beyond good flying practice.
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