700 gram egg??? does the plane weight equal 700 grams and it needs to carry an egg? 700 grams is approx 24 ounces right? Thats one big egg..(Ostrich maybe??) (hmmm didnd't see the other posts.. sorry)

If yoiu need to design the plane.. rather than build from plans.. lots of info for that on the web. Let us know.
Mike