Cessna T-37 Tweet

What the Cessna T-37 Tweet Is

The Cessna T-37 Tweet is a small twin-engine jet trainer with side-by-side seating. It was the first U.S. Air Force jet designed from the start as a trainer, and it taught thousands of students the basics of jet flying, instrument work, formation and night flying.

Pilots called it the “Tweety Bird” or just the “Tweet.” Other nicknames were less kind: “Screaming Mimi,” the “6,000-pound dog whistle” and the “Converter,” because it turned fuel and air into noise and smoke.

Why It Was Built

In 1952 the Air Force issued its Trainer Experimental (TX) requirement for a cheap two-seat jet that could take students straight from piston trainers. Cessna’s Model 318 won, and three XT-37 prototypes were ordered in spring 1954.

The first prototype flew on October 12, 1954. It was lost during spin testing, so later prototypes gained nose strakes and a larger tail.

The first production T-37A was delivered in June 1956, and Air Force student training began in 1957. Side-by-side seats let the instructor watch the student’s hands and talk without shouting over the intercom.

T-37A, T-37B, T-37C and the A-37

The T-37A used J69-T-9 engines. The T-37B entered service in 1959 with more powerful J69-T-25 engines, a redesigned instrument panel and better radios and navigation gear. The surviving A models were later brought up to B standard.

The T-37C was built for export, with provisions for armament and extra fuel. The A-37 Dragonfly, a strengthened light-attack derivative, flew in the Vietnam War and is a separate aircraft.

Sources disagree on the A and C production splits. Wikipedia and Military Factory give different counts, but all agree on about 1,269 T-37s built before production ended in 1975.

The Noise and the Spin

The Tweet’s small turbojets drew air through narrow intakes that produced a high-pitched shriek. Bases soundproofed buildings and ground crews had to wear ear protection.

The type also had a reputation in spins. Production aircraft were tricky to recover, and the procedure was relatively complex. Improper fuel distribution could create a weight imbalance that led to an unrecoverable stall, yet students still spun the aircraft on purpose as part of training.

Explaining the Numbers

The full specification table for the aircraft is on this page. Two figures need context.

The ceiling is the Air Force’s published figure. Other references quote a higher number, but Tweets flew training missions with an unpressurized cockpit, and Air Force rules limited that cockpit to 25,000 feet.

The speed rows show the top speed of the T-37B. A Tweet’s normal cruise is lower, and a student pattern speed was far lower still, because the design requirement called for gentle low-speed handling.

Cost, Price and Whether You Can Buy One

Low cost was the point of the TX program. The price field on this page gives the flyaway figure we hold, in 1960 dollars.

Many retired Tweets sit in museums, including the examples pictured on this page. Anyone considering a surplus military jet should check the airframe’s paperwork and ownership restrictions first.

How the T-37 Fit Into Pilot Training

Students flew the Tweet first, then moved up to the faster, supersonic T-38 Talon. The Air Force replaced the Tweet with the propeller-driven T-6 Texan II.

Is the T-37 Still in Service?

Not with the U.S. Air Force. The last student training sortie in a T-37B flew from Sheppard AFB, Texas, on June 17, 2009, and the last Tweet was retired from active service on July 31, 2009.

Pakistan was still listed as an operator in Wikipedia’s most recent update, which reported a Pakistan Air Force Tweet crash in October 2024 in which both pilots ejected. We found no 2026 source confirming the current Pakistani fleet size, so treat the type as in limited foreign service.

Safety Record

By 1996 the Tweet had suffered 132 Class A accidents and 75 fatalities, mostly attributed to pilot error. Common causes were inadvertent engine shutdown from throttle mismanagement, cold-weather operation and oil system problems.

Bird strikes between 1965 and 1970 led to a Lexan windshield retrofit rated against a 4-pound bird.

Frequently Asked Questions

How much does a Cessna T-37 cost?

The Air Force bought them cheaply, and our price field carries the flyaway figure in 1960 dollars. Used examples are rare and priced by condition and paperwork, so there is no standard market price.

Is the T-37 still in service?

The Air Force retired it in 2009. Pakistan has been the last reported operator, with the type in limited service, though we could not confirm a current fleet count.

What is the hardest plane to fly in the USAF?

There is no official ranking. Among trainers, the Tweet had a name for tricky spin recovery, which students still practiced deliberately.

Is the T-37 the same as the A-37 Dragonfly?

No. The A-37 was a strengthened light-attack derivative with a minigun, wing pylons and wingtip tanks, developed for counter-insurgency use in the Vietnam War.