-ful. 1  Used to form adjectives from nouns. 2  An adjective derived by this suffix implies a thorough and certain possession of the quality of that noun, not a metaphorical fullness with it by degree or quantity.ful. 1  Used to form adjectives from nouns. 2  An adjective derived by this suffix implies a thorough and certain possession of the quality of that noun, not a metaphorical fullness with it by degree or quantity.
big highway image by Galyna Andrushko from <a href='http://www.fotolia.com'>Fotolia.com</a>. A delta angle, a term well known to civil engineers, is a measurement used in designing roadways. The delta angle is used to make other relevant calculations, or it can be determined using known measurements. A delta angle is the measurement in degrees where two straight lines, also known as tangents, intersect. A horizontal circular curve is a mathematical calculation determining the optimal arc between two tangents. The measurement of the central curve on the arc is equal to the delta angle.
At low speeds a delta wing requires a high angle of attack to maintain lift. A slender delta creates a characteristic vortex pattern over the upper surface which enhances lift. Some types with intermediate sweep have been given retractable moustaches or fixed leading-edge root extensions (LERX) to encourage vortex formation.