DR400 Aircraft: History and Model Development
The DR400 represents a significant chapter in light aircraft design, blending versatility with performance. The journey began in early 1972 in Darois, where the first prototype—a 180hp model known as the "Régent"—took to the skies. Following this successful test, official production of the DR400 series commenced on May 10, 1972.
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The Initial Lineup
From its inception, the DR400 was designed to cater to various aviation needs, resulting in six initial versions. The naming convention for these models follows the logic of the DR300 series, where the version name directly indicates the engine's horsepower (hp).
- DR400-180 "Régent": The pioneer of the series, first flying on March 27, 1972 (Registration: F-WSQO).
- DR400-125 "Petit Prince": First flight on May 15, 1972 (Registration: F-WSQT).
- DR400-160 "Chevalier": First flight on June 29, 1972.
- DR400-180R "Remorqueur": A specialized towing version that first flew on November 6, 1972.
- DR400-140 "Major": First flight on November 16, 1972.
- DR400-108 "Dauphin 2+2": First flight on November 24, 1972.
Design Evolution and Modifications
Visual and structural changes were implemented over the years to improve utility and aesthetics. Most DR400 aircraft feature a painted canopy top. However, the "Petit Prince" utilized a tinted plexiglass canopy, and the 180R featured a clear canopy to ensure maximum visibility during towing operations.
In 1974, the 180R was equipped with an additional rear window, a feature that was standardized across all DR400 versions by 1987. While this improved the aircraft's look, it came with a performance cost. The addition of a firewall and necessary reinforcements added 25kg to the aircraft's mass, which hindered flight capabilities. Consequently, these modifications were removed from the less powerful models in 1993.
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Model Renaming and Iterations
The product line underwent several name changes to reflect technical updates. In 1975, the DR400-108 became the DR400-100, and the "Petit Prince" was renamed the DR400-120. The DR400-120 was later equipped with a new propeller and renamed the "Dauphin," while production of the DR400-100 ended in 1979.
By 1980, the DR400 B Major was replaced by the DR400 Major 80. While maintaining 160hp, the Major 80 boasted an extended range of 1,375 km, positioning it as a highly attractive option for long-distance travel.
Market Success and Succession
Among the various iterations, the "Dauphin 2+2" emerged as the most successful. Thanks to its competitive pricing and strong performance characteristics, it became the best-selling version of the DR400 family, maintaining its popularity well into the 21st century.
The evolution of the series eventually led to the development of the DR401, which succeeded the DR400 by incorporating more modern technology and enhanced passenger comfort.
Key Facts
- Production Start: May 10, 1972.
- Naming Logic: Model numbers correspond to engine horsepower.
- Best Seller: The "Dauphin 2+2" is the most popular version.
- Long Range: The Major 80 offers a travel range of 1,375 km.
- Weight Impact: Rear window and firewall additions added 25kg to the airframe.
- Successor: The DR401 replaced the DR400 with updated technology.
| Model Name | Horsepower | First Flight Date |
|---|---|---|
| DR400-180 "Régent" | 180 hp | March 27, 1972 |
| DR400-125 "Petit Prince" | 125 hp | May 15, 1972 |
| DR400-160 "Chevalier" | 160 hp | June 29, 1972 |
| DR400-180R "Remorqueur" | 180 hp | November 6, 1972 |
| DR400-140 "Major" | 140 hp | November 16, 1972 |
| DR400-108 "Dauphin 2+2" | 108 hp | November 24, 1972 |
Frequently Asked Questions
How does the DR400 naming system work?
The naming system is based on the engine's horsepower; for example, the DR400-180 is equipped with a 180hp engine.
Why did the DR400-180R have a clear canopy?
The 180R (Remorqueur) featured a clear canopy to improve visibility for the pilot during towing operations.
What was the impact of adding the rear window to the aircraft?
While it improved the appearance, the addition of the window, reinforcements, and a firewall added 25kg to the aircraft, which hindered flight performance. This led to the removal of these features from less powerful versions in 1993.
Which DR400 model is the most successful commercially?
The "Dauphin 2+2" is the most sold version due to its attractive price and good performance.
What is the range of the DR400 Major 80?
The DR400 Major 80 has an extended range of 1,375 km.
What aircraft succeeded the DR400?
The DR400 was succeeded by the DR401, which offered increased comfort and more modern technology.