I am preparing biofoam catapult launch glider with wingspan 0f 30cm and chord of 6cm.now i dont have balsawood for constructing the fuselage.what are the alternatives i could use for fuselage material?please help...

use biofoam only

I don't think  biofoam only fuselage is suitable for a catapult launch glider. CF tube would be much better.Or even bamboo stick can be used I think.
  ---Rao

sir how can the biofoam be used as fuselage for catapult-launch glider because its a weak structure and when contact with rubberband it will get broken.
i have used coroplast its working verywell.

hey karthik
i will share with you an idea of reinforcing the biofoam it is really really effective first take two carbon rods (ask sai uncle) if you cant get them and use any wooden tube small one. attach them to the wing and the fuselage with hot glue or any other method you like.

next take any clear tape (i use wonder-555) and coat the fuselage and the wing with it

next step is to take the nose of your ho glue gun and gentle move over the surface of the tape it makes it shrink and hold on to it this is very durable

subbu

thanks my friend now you told to fix the cf rod with biofoam fuselage as well as wing.now i am going to make catapult/handlaunch glider.will not the cfrod make the glider heavy?
1.one more thing shall i use balsawood of 2mm thickness instead of cfrod?