Blade outer air seal with large radius of curvature mount hooks

A blade outer air seal comprising:

• a central web having a radially inner surface centered on an axis to be positioned outwardly of a rotating blade in a gas turbine engine;
• seal mount hooks formed on both a leading edge of said central web and a trailing edge of said central web, said seal mount hooks having a generally radially outward extending section extending to a generally axially extending section;
• said seal mount hooks having a support face which is to be supported on a support mount hook, and the support face being generally formed about a single radius of curvature over at least 50% of a circumferential length defined from a radially inner end of said support face to a radially outer end of said support face, and a radius of curvature of said inner support surface being greater than or equal to 0.150 inch and less than or equal to 0.300 inch;
• wherein the support face is formed on the single radius of curvature over the entire circumferential length between the radially inner and radially outer ends;
• wherein the web has a radially outer surface which is formed to be generally flat;
• and
• said blade outer air seal is formed of ceramic matrix composites.

A gas turbine engine comprising:

• a compressor section, a combustor, and a turbine section, said turbine section having a plurality of rows of rotating turbine blades rotating about an axis having a radially outer blade tip, and a blade outer air seal positioned radially outwardly of at least one of said rotating turbine blade rows;
• said blade outer air seal having a central web with a radially inner surface positioned outwardly of at least one of the rotating turbine blades with seal mount hooks formed on both a leading edge of said central web and a trailing edge of said central web, said seal mount hooks having a generally radially outward extending section extending to a generally axially extending section;
• and
• said seal mount hooks having a support face which is to be supported on a support mount hook, and the support face being generally formed about a single radius of curvature over at least 50% of a circumferential length defined from a radially inner end of said support face to a radially outer end of said support face, and a radius of curvature of said inner support surface being greater than or equal to 0.150 inch and less than or equal to 0.300 inch.