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Jun 01, 2012, 02:45 AM
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Joined Aug 2011
149 Posts
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2,3m / 88" Extra 300 Depron/fiberglas composit Scratchbuild - Extreme Light
Hey folks
After building lots of depron planes, including a 1/4 Cub, I have now started this new project: A 2,3m Extra 300, builded in 3mm Depron, and full covered with 49g fiberglass. I beliewe in a takeoff weight about 4-5kg. My Cub - takeoff weight 2,2kg  First step on the Extra 
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Last edited by polledk; Jun 03, 2012 at 06:07 PM.
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Jun 01, 2012, 01:27 PM
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Joined Jan 2009
1,361 Posts
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Wow! 2.3 meters is HUGE! Good luck on the maiden!
What glue do you use between wood and foam? |
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Jun 01, 2012, 04:33 PM
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Joined Aug 2011
149 Posts
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Quote:
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Jun 02, 2012, 05:27 PM
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Joined Aug 2011
149 Posts
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Latest pic´s from the workshop
   
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Jun 03, 2012, 09:57 AM
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Joined Aug 2011
149 Posts
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More pic´s of the wing construction
    
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Jun 03, 2012, 06:09 PM
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Joined Aug 2011
149 Posts
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First wingsection almost done.
Weight this far is 146g/5oz  
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Jun 03, 2012, 06:55 PM
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Canada, ON, Ottawa
Joined Dec 2011
99 Posts
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Thats huge! Great work so far.
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Jun 04, 2012, 03:51 AM
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South of France
Joined Jan 2008
1,198 Posts
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Hi !
Very interesting project... Subscrived ! 
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Jun 07, 2012, 11:18 AM
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Joined Dec 2005
2,174 Posts
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How is the progress?
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Jun 07, 2012, 04:54 PM
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Joined Aug 2011
149 Posts
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Got a few more pic´s from the work so far.
The wingpanels this far are showing 207g / 7,3OZ each.      Motor is ordered: Hacker A60-6XS 
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Jun 09, 2012, 08:58 AM
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Joined Aug 2011
149 Posts
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The maingears on the market, that will fit this size, are too stiff and heavy, so i´ll try make one myself.
Laminated in plywood. First I have wet the 4 layers of 1mm ply, and will let them dry in the form. Them I´ll glue them with polyurethane, again in the form.    
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Jun 10, 2012, 04:31 PM
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Joined Aug 2011
149 Posts
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Maingear is out of the form. It was still feeling wet, so into the owen for 6 hours. Now it feels dry, and strenght is feeling like it will work. weight is 106g
 First wing panel is ready to be sanded, and then fiberglass. Weight incl. aileron is 216g 
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Jun 12, 2012, 02:44 PM
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Joined Aug 2011
149 Posts
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Both wingpanels are now ready to be sanded before fiberglas, so its time for the fuselage.
I´ll use same construction pricip as the Extreme Flight I´m copying, with an inner section, wich will be the connection between motor, accu, wing and maingear.  weight for inner section incl. maingear is 310g   
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Jun 15, 2012, 04:54 AM
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Joined Aug 2011
149 Posts
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Status this far
  
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Jun 15, 2012, 05:40 PM
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Joined Aug 2011
149 Posts
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And - some more pic´s
   Dowels in 2mm carbon 
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