|Jul 23, 2012, 07:16 PM|
OSG pimped for the Slope #4
It's been 3 months and 1 week since my "looking for slope glider plans" post. Today, finally, my "Pimped OSG" is Almost Ready To Fly! Tomorrow the weather could just be good enough for a few tosses... fingers crossed that all the hard work actually pays out!
I was aiming at a slope glider somewhere between 1000 and 1500g of weight. As I put it on the scale today, I was surprised to see AUW 920g! Wow! For a 1.8m wing span, depron / balsa / plywood combination all covered in GFK, I was pretty happy with the result.
Unfortunately, the plane is SO tail heavy, that I had to stuck 140g of ballast into the nose to get the CG right. That brought me to 1060g - still nice, but I'm kind of disappointed I have to carry dead weight around.
Anyway, I'm proud of the result, over 1kg or not.
Tomorrow I just need to think of a way to secure the battery in the compartment, measure the motor current (it's an rctimer A2830/8 with a 9x4 folding prop on a 3S lipo), close that fuselage gap behind the TE of the wing, and I'm ready to go. I'll think of some nice covering for the wing servos later, if the plane proves to be airworthy. (Update: measured current was 19A, exactly as specified for the motor; and yes, she IS airworthy, you might want to check the first in-flight video here, it's being uploaded right now, if you are not reading this the moment I am writing it, it should already be there
During this process, I learned a LOT! Besides the theory, I had my first hands-on experience with:
- Balsa. Great material!
- Beli Zell. I just love this glue!
- Making silicon hinges. I'm really happy with the result! It stinks, it takes days to cure, but it seems to work beyond all expectations. Just use the correct silicon (I used Elastosil E41)
- Laminating with GFK. I'm not afraid of EPOXY any more.
- R&G Epoxy
- Building stuff with plywood. Also nice, much nicer than it used to be in the school, probably because the result was a PLANE, and not a bird housing or a tool box!
Here some pics.
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