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Aviation History
1964
1964 - 1584.PDF
FLIGHT International, 21 May 1964 Everything we learned from building 10,000 small gas turbine engines has been packed into this new 600-horsepower turboprop engine —and it shows! You'd probably expect theworld's largest manufacturerof small gas turbine engines to turn out the world's finest small turboprop job. And we have. We call our new engine the TPE-331. (The military version is designated T-76.) It is a versatile turbine capable of powering many vehicles. Its 600-horsepower cate- gory makes it particularly suitable for the new generation of executive and military fixed-wing aircraft. More specifically, our new prime propulsion engine is designed to fill the gap between reciprocating engines and larger turboprops. And the reason we built it, is because both civil and military sources have asked for a simple, nigged, reliable, easy-to-maintain, economically-operated, light- weight turboprop engine. ^ Th 331 n Ob- mini; Pumj M? Preci Garrett-AiResearch TPE- *e than fills the bill, ously, building such an is a specialized art that is experience, especially in arization of controls, oil and starter motors, ifacturing tolerances are and have a greater effect on performance than in a large engine. Scaling down big engine techniques is not the answer. The TPE-331 has a specific fuel consumption of .62 pound per shaft horsepower hour. Its weight to power ratio is .45 pound per horsepower. Response rate from flight idle to full power is approximately 1/3 of a second. Single-casting turbine wheels are typical of the simple, rugged components of this new engine. A two-stage centrifugal compressor is driven by a 3-stage axial turbine. Propeller drive is through a 2-step reduction gear box offset for flexibility of aircraft design The fuel system of the TPE-331 consists of a fuel filter, single high- pressure pump, speed-governing fuel control, manual shutoff valve, flow divider and fuel nozzles. JP-5 is the normal fuel, but this engine will take all kinds of fuel, ranging from AV-gas to light diesel fuel. If this new turboprop engine sounds like something very special to you, we've made our point. The TPE-331 is an excep- tional engine. It's the kind of a power development you'd expect to come from Garrett. For when it comes to turbine engines under 1000 horsepower... Garrett is experience Los Angeles • Phoenix or further information contact Garrett International S.A., Rue des Pierres-du-Niton 17, Geneva, Switzerland. Second Class Postage Paid at New York, N.Y.
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