Do 228 vs Do 328

Dornier’s aerospace production splits cleanly between the unpressurized Do 228 utility aircraft and the streamlined, pressurized Do 328. While both share the manufacturer’s supercritical wing technology, they serve different procurement requirements. The Do 228 was engineered from the ground up for austere, short-takeoff-and-landing (STOL) tactical lift and maritime patrol. The Do 328 originated as a 30-seat commercial commuter designed to match regional jet speeds, only later finding a specialized military role in special operations logistics.

Development and Design

The Do 228 program centered on the TNT (Tragflügel neuer Technologie) supercritical wing, attached to a utilitarian, rectangular fuselage. Dornier used integrally milled alloy panels and Kevlar control surfaces to eliminate 12,000 rivets and reduce weight by 15%. Designed for rough-field environments, it relies on 578 kW Garrett TPE331 turboprops and fixed landing gear. The Do 328 was developed under Deutsche Aerospace to capture the regional airline market. It utilizes a pressurized, aerodynamically refined fuselage and retractable gear with high-flotation tires. It integrates carbon fiber composites in the empennage for a 20% weight reduction. Powered by 1,400 kW Pratt & Whitney PW119 turboprops driving fully reversible six-blade propellers, the Do 328 prioritizes high-speed cruise and acoustic management over tactical utility.

Specifications and Performances

The performance metrics dictate their operational envelopes. The Do 328 operates at a higher weight class, with a 13,990 kg maximum takeoff weight (MTOW) compared to the Do 228’s 6,400 kg. This mass is offset by the Do 328's twin engines, which generate nearly 2.5 times the thrust of the Do 228’s powerplants. Consequently, the Do 328 cruises at 620 km/h and reaches a service ceiling of 9,455 m. The Do 228 is restricted to a top speed of 470 km/h and an 8,534 m ceiling. The Do 328 covers 1,852 km, whereas the Do 228 operates within a 396 km radius at maximum payload. The Do 228 trades these speed and range deficits for outright STOL performance on unprepared dirt strips.

Deployment and usage

The Do 228 functions primarily as a maritime patrol and light tactical transport platform. Its operational deployments include:

• Coastal enforcement by the Indian Coast Guard and Navy using HAL-built airframes equipped with 360-degree radar and FLIR.
• Border patrol and environmental research across European maritime zones.

The Do 328 serves a narrower military niche. The United States Air Force Special Operations Command (AFSOC) operates twenty Do 328s under the C-146A Wolfhound designation. These airframes conduct non-standard aviation and intra-theater airlift for special operations forces. Australia previously utilized modified 328-100s for long-range search and rescue, integrating EL/M 2022A radars and underwing dispatch chutes.

Conclusion

The Do 228 holds the absolute edge in tactical STOL operations and low-altitude maritime patrol. Its unpressurized, boxy cabin accommodates bulky cargo, and its $8.0 million unit cost makes it accessible for developing militaries. The $12.0 million Do 328 is the superior platform for intra-theater logistics and special operations transport. Its 620 km/h speed and 1,852 km range allow forces to move personnel rapidly across theater distances, making it the definitive choice for covert deployment missions where speed outranks the need to land on unimproved forward operating bases.