# SM-65D Atlas

> first operational version of the U.S. Atlas missile

**Wikidata**: [Q2895380](https://www.wikidata.org/wiki/Q2895380)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/SM-65D_Atlas)  
**Source**: https://4ort.xyz/entity/sm-65d-atlas

## Summary
The SM-65D Atlas is the first operational version of the U.S. Atlas missile, developed by Convair and first flown on April 14, 1959. It served as an expendable launch vehicle for both military and civilian payloads, including early American orbital missions like Mercury-Atlas 6 and various U.S. Air Force satellites.

## Key Facts
- **First operational version** of the Atlas missile system
- **First flight**: April 14, 1959
- **Manufacturer**: Convair
- **Primary use**: Nuclear weapons delivery and space launch vehicle
- **Country of origin**: United States
- **Subclass of**: SM-65 Atlas and expendable launch vehicle
- **Notable payloads**: Mercury-Atlas missions (6–9) and OV1-series satellites
- **Aliases**: Atlas D, SM-65Dアトラス
- **Wikidata description**: First operational version of the U.S. Atlas missile

## FAQs
### Q: What was the SM-65D Atlas used for?
A: The SM-65D Atlas was primarily used as an expendable launch vehicle for nuclear weapons delivery and space missions, including the first American orbital flight (Mercury-Atlas 6) and various U.S. Air Force satellites.

### Q: Who manufactured the SM-65D Atlas?
A: The SM-65D Atlas was manufactured by Convair, a major American aerospace company.

### Q: What was the first flight date of the SM-65D Atlas?
A: The first flight of the SM-65D Atlas occurred on April 14, 1959.

### Q: What were some notable payloads launched by the SM-65D Atlas?
A: Notable payloads included the Mercury-Atlas missions (6–9) and OV1-series satellites, such as OV1-1, OV1-3, and OV1-86.

### Q: How does the SM-65D Atlas differ from other Atlas versions?
A: The SM-65D Atlas was the first operational version, distinguished by its role in early space missions and military applications, setting the foundation for later Atlas models.

## Why It Matters
The SM-65D Atlas played a pivotal role in the early days of the U.S. space program. As the first operational Atlas missile, it enabled critical missions such as the Mercury-Atlas 6 flight, which marked the first successful American orbital spaceflight. Additionally, it supported the deployment of early U.S. Air Force satellites, demonstrating the versatility of the Atlas system in both military and civilian applications. Its success laid the groundwork for future Atlas launches, including those that carried astronauts into space and contributed to the broader advancements in space exploration.

## Notable For
- **First operational Atlas missile**, paving the way for subsequent versions.
- **Launched Mercury-Atlas 6**, the first American orbital spaceflight.
- **Supported early U.S. Air Force satellites**, including OV1-series missions.
- **Expendable launch vehicle**, designed for single-use missions.
- **Nuclear weapons delivery capability**, enhancing U.S. strategic deterrence.

## Body
### Overview
The SM-65D Atlas, also known as Atlas D, was the first operational version of the Atlas missile system. Developed by Convair, it made its maiden flight on April 14, 1959, marking a significant milestone in U.S. aerospace history. The missile was designed for both military and civilian applications, including nuclear weapons delivery and space launches.

### Development and Specifications
- **Manufacturer**: Convair
- **First flight**: April 14, 1959
- **Primary use**: Nuclear weapons delivery and space launches
- **Subclass**: SM-65 Atlas and expendable launch vehicle

### Notable Missions
- **Mercury-Atlas 6**: Launched on February 20, 1962, marking the first successful American orbital spaceflight.
- **Mercury-Atlas 7–9**: Subsequent crewed missions that further demonstrated the Atlas system's reliability.
- **OV1-series satellites**: The SM-65D Atlas launched various U.S. Air Force satellites, including OV1-1, OV1-3, OV1-86, and others, contributing to early space-based research and communications.

### Legacy
The SM-65D Atlas set the foundation for future Atlas launches, including those that carried astronauts into space. Its success in early missions laid the groundwork for the broader U.S. space program, demonstrating the Atlas system's versatility and reliability.

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