Abstract: An artificially enhanced or induced windsource wind accessory device for use with a tethered display device. The wind accessory device has a hollow air director, a natural air intake port, a generated wind port, and an air output port to the banner. Generated wind intake air activates a blocker to close the natural wind intake port. Optionally, the banner is lighted from a light source disposed inside the air director. In an alternate embodiment, the wind accessory device has a perforated tube connected to a wind source and the tube has multiple perforations along the section adjacent to the banner and the perforations face the banner.

Abstract: A tethered display device with at least two vertical panels connected at a top seam and a bottom seam. The panels are preferably cloth or other soft and flexible material. The panels and seams define at least one tubular channel through which air can flow. In preferred embodiments there are multiple channels in each device. Preferred embodiments will also have at least one soft airfoil horizontally disposed between and connected to the two vertical panels. In the simplest airfoil embodiment, the airfoil defines two tubular channels, the one above the airfoil and the one below it; in each airfoil embodiment, an airfoil so defines in part at least one of the tubular channels. In some embodiments there are multiple airfoils. The device may be employed optionally in combination with an artificially enhanced or induced windsource.