Introduction

The Basic Glider Criteria Handbook contains design recommendations based on the present knowledge and development of glider design. They may be used as the minimum standards for establishing the classifications and related airworthiness of both conventional type gliders and those equipped with auxiliary powerplants.

New types of gliders and new materials and types of construction may, however, incorporate features to which the recommendations cannot be logically applied. In such cases, special consideration will be given to the particular new problems involved.

In cases where deviation from the conventional is small, sufficient evidence should be submitted to show that the proposed deviation will not be detrimental to the airworthiness of the design. When the deviation from the conventional is considerable, special recommendations covering the features in question should be obtained from the Federal Aviation Agency.

Insofar as the recommendations are concerned, rotating wing, seaplane and amphibian type gliders are considered unconventional.

Classification of Gliders

For the purpose of applying the recommendations, gliders are classified on the basis of certain imposed operating limitations.

In general, the various glider types can be classified as high performance or utility types.

A high performance or advanced type glider is especially designed for the maximum performance within a selected range of conditions. The utility type is a medium performance, nonacrobatic type of glider designed for normal operations.

When doubt exists as to a particular glider's classification, the basic flight envelope, together with a three-view drawing, should be submitted to FAA so that a definite recommendation can be obtained. (If acrobatics are contemplated, provisions should be made for installation of parachutes, which are required for each occupant.)