The original inspiration for the subject of this article (above left). Upper and lower 1⁄32-inch sheet balsa wing blanks (above right) weigh 2.7 grams and 2.4 grams respectively. Fuselage 1⁄32-inch sheet balsa side skins (below left) (two


required) are 2.0 grams each, with extra length so that c.g. could be adjusted to compensate for difference in motor package weight. Horizontal tail components (below right) of 1⁄32-inch sheet balsa. 0.65 gram total.


1. Go for aircraft that offer the lightest possible wing loading (lots of wing area for lightest possible wing loading for your first try).


2. If possible, substitute a thin cambered airfoil section in place of a “scale” airfoil. The ParkZone Sukhoi 26M has a “regular” scale-like airfoil while their P-51 has a thin


cambered airfoil. The P-51 is much easier to fly and has better low airspeed characteris- tics even though both it and the Sukhoi 26M share many other features like radio, motor unit and basic weight. WW I and Pre WW I Pioneer aircraft have a lot to offer in this category even if they may be lacking in some other areas. Remem-


ber that these models operate in an entirely different Reynolds number range than their full size counterpart. This is why bird and insect wings look the way they do. Nature knows that the air molecules look bigger to these smaller flyers with different viscous effects and follows her rules accordingly. 3. Some F/F sheet balsa models featured


Vertical tail components of 1⁄32-inch sheet balsa (above left). 0.20 gram total. Built up bulkheads F1, F2, F3 and F4 (1⁄16 sheet and strip) (above center). 0.5


FLYING MODELS


gram total weight for all four. Laminated front bulkhead (above right) (four layers of 1⁄32 × 1⁄8-inch balsa strip). 0.2 gram total.


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