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Monday, February 19, 2007

Zagi Goes Hi Tech

After cutting my second batch of Zagi foam cores I wanted to bag one for myself using the standard bagging techniques my friend Evan Shaw use.

I have built and bag one Zagi with Evan when he was still resident in Ladybrand and although we use brown paper instead of glass cloth, the end result was a very light and stiff air frame, and the performance a cut above the normal foami /come what ever covering Zagi.

So here are some pictures fresh from the vacuum bag this morning.

The basic construction after foam cores were cut is as follows:
a) The leading edges are reinforced with carbon tows and a thin layer of glass.
b) Carbon tows are wetted out and placed in length wise prepared groves in the wing to form spars top and bottom.
c) 4 x Mylar sheets are cut to size the left and right (top and bottom) are ram waxed and the color scheme spry painted on.
d) After the Mylar’s with the paint on has dried, I laid up one layer of 46-gram glass cloth, and another layer of 106 gram and wet it out.
e) After all the Mylar’s are wetted out, they get placed on the foam cores, and the whole wing is then
placed in the vacuum bag
f) Vacuum is applied and maintained over night.
g) If every thing goes well you can un bag your Zagi wing by the next morning, almost ready to fly
(radio installation and winglets sill to be done).
The Zagi done with this method is not combat legal, it is my goal to see how fast a bagged Zagi
can fly.
The zagi in the pictures shown weighed 430 gram (with out equipment) and I estimate an all up Wight of +/- 600 grams.
If you want to obtain a bagged Zagi or need more info on building your own you can email me

1 comment:

Anonymous said...

It looks very nice , well done.