Oblique Wing (from Wikipedia, the free encyclopedia)
An Oblique wing is a variable geometry wing concept. On an aircraft so equipped, the wing is designed to rotate on center pivot, so that one tip is swept forward while the opposite tip is swept aft. By changing its sweep angle in this way, drag can be reduced at high speed (with the wing swept) without sacrificing low speed performance (with the wing perpendicular).
Posted by Geode |
Jun 08, 2008 @ 02:28 PM | 27,409 Views
Here is the balsa implementation of SGII-like pod. The pod is sliced into pieces (sliced contours), then assembled and sanded to shape (similar to the approach used in the wing tip).
1/1.5 mm CF rods for sides/bottom. A few 0.75oz FG stripes on four side, then a thin coat of water based varathane. Note that CF rods goes all the way to the pod/boom joint to avoid "neck" breaking during bad landing.
Pod and pylon AUW - 20g. Not bad compared to 25g raptre pod or my home made 15g "5oz CF/1.4oz Kevlar" pod.
- Manta DLG wing planform with reduced chord
- Hyperbolic wing bending
- Conventional balsa build-up wing with diagonal ribs
- SGII-like balsa pod with CF rod re-enforcement
- Full flying bagged tail feathers
. Span - 59 in
. Area - 361 sq in
. Mass - 8.0 oz (8.4 oz after CG trimming)
. Loading - 3.35 oz/sq ft
. Airfoil - AG04 family
- Balsa shaping with templates (similar to "hot wire foam cutting")
- Geodetic ribs with Dbox
- Main spar - 1.5 mm CF rod / balsa / 1.5 mm CF rod
- LE - solid balsa Dbox; TE - ~ 1mm x 3mm CF flat
- Span - 59 inches
- Planform: double ellipse; triple polyhedral
- Airfoil: AG12/13/14
- Mass: 8.2 oz
- Area: 336 sq in
- Loading: 3.5 oz/sq ft
Flight Test - Dead Air Time
# of flights - 17
Min dead air time (DAT) - 62.5 s
Max DAT - 120 s
Average DAT - 79 s