Back to results
US 4,789,304 AGranted
Insulated propeller blade
AssigneeUnited Technologies Corporation
InventorsRobert Gustafson, David P. Nagle
Life of this patent
Estimating the term…
Abstract
A propeller blade is insulated to withstand the high temperature exhaust of a gas turbine engine. The blade has a spar, a skin covering the spar and forming a contour of the blade, and an insulating layer disposed between the spar and the skin along the portion of the blade operating within the high temperature exhaust of an engine.
Claims7
A propeller blade having an exterior portion operating within a high temperature exhaust stream of an engine, said blade characterized by:
- a spar approximating a contour of said blade,
- an outer first skin covering said spar and forming a contour of said blade, and
- insulating means disposed between said spar and said first skin along said portion for protecting said spar from said temperature of said exhaust stream such that the temperature of said spar does not exceed 260.degree. F.
Dependencies are inferred from the claim text.