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Old 01-04-2008 | 01:34 PM
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Hossfly
 
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From: New Caney, TX
Default RE: CA and EPoxy


ORIGINAL: Seb23

Hey guys,

How are you all doing ? I'm starting my build of Goldberg cub tomorow and just wondering where is recommended to apply ca glue and where is recommended to apply Epoxy? There must be some areas that require more strenght. Please let me know what you're opinions are, and it will make my built stronger and succesful.

Thanks
Seb, it is really difficult to mess things up, however you might go. However just think where you want strength. Of course that is in the areas of engine mounting, landing gear placement, gluing on tail feathers and wing mounting structure.

Those mentioned areas need the strength. Other structure will generally hold together with minimal glue.
Engine Mount: Use epoxy and a relatively slow one. I use 30 min. here. This area takes a beating all the time.
Landing gear: Same as an engine mount, but gets less beatings, although some really severe ones.

Wing and Tail mounting. Lots of pressures exerted here. Rolling high G turns can really flex the tail planes. (1:1 scale G load limits are less in rolling maneuvers than straight pull-out maneuvers due to this factor)
The wing supports the entire load of the aircraft weight. It needs strength especially in the center area and about to the 1/2 way out each panel. For example, Your model weighs 5#. You make a quick pull-out using -- let's say -- 10Gs, which now makes that wing support 50# weight. That's a bunch in a quick loading. [X(]
5 min. epoxy works in these areas, 30 min is better and you can do OK with using carpenter's glue. I use epoxy. (Heck we use to do it all with cellulose glue. Not so funny at times: )

One tip is that you can use CA to tack things, while all the interior touching joints are coated with epox/carp. glue. Saves a bunch of clamping and waiting. You have the parts secured well enough to just press on with the building and before you get to the flying field, it's all dry and ready to go.

Glad to see a BUILDER joining the modeler's fraternity. Let me see the finished work.