The Daedric bow follows the Recurve bow design in which the tips curve away from the archer when the bow is strung. True to its predecessors from previous games, the Daedric Bow's design is demonic in appearance with several spikes protruding from various parts of the body.
The Daedric Bow requires a Smithing level of 90 and the Daedric Smithing perk to create. It can be upgraded with an Ebony Ingot at a and also benefits from the Daedric Smithing perk, which doubles the improvement. [Source: wikia]
You can download the papercraft model here: The Elder Scrolls V: Skyrim - Daedric Bow Free Papercraft Download