# Delta IV Medium+(5,4)

> variant of the Delta IV space launch vehicle

**Wikidata**: [Q16354315](https://www.wikidata.org/wiki/Q16354315)  
**Source**: https://4ort.xyz/entity/delta-iv-medium-5-4

## Summary
Delta IV Medium+(5,4) is a variant of the Delta IV space launch vehicle, part of the Delta rocket family. It is an expendable launch system used for military and commercial satellite deployments.

## Key Facts
- Delta IV Medium+(5,4) is a variant of the Delta IV expendable launch system
- It belongs to the Delta rocket family of launch vehicles
- The variant is also known as Delta 9450 and Delta-4M+(5,4)
- It has been used to launch military communications satellites for the United States Space Force
- The launch system has a sitelink count of 1 on Wikidata
- It is described in Latvian (lv) on Wikipedia
- Related launches include USA-272, USA-275, USA-243, USA-211, USA-244, USA-233, and USA-263

## FAQs
### Q: What is Delta IV Medium+(5,4)?
A: Delta IV Medium+(5,4) is a variant of the Delta IV expendable launch system, used for launching satellites into orbit. It is part of the Delta rocket family and has been employed for both military and commercial missions.

### Q: What are the alternative names for Delta IV Medium+(5,4)?
A: Delta IV Medium+(5,4) is also known as Delta 9450 and Delta-4M+(5,4).

### Q: What type of missions has Delta IV Medium+(5,4) been used for?
A: Delta IV Medium+(5,4) has been used to launch military communications satellites for the United States Space Force, including missions designated USA-272, USA-275, USA-243, USA-211, USA-244, USA-233, and USA-263.

## Why It Matters
Delta IV Medium+(5,4) plays a crucial role in the United States' space launch capabilities, particularly for military and national security missions. As a variant of the Delta IV family, it provides a reliable and powerful means of deploying satellites into orbit, supporting critical communications, reconnaissance, and other space-based operations. The system's versatility allows it to handle a range of payload sizes and mission profiles, making it an essential asset for both government and commercial space endeavors. Its continued use demonstrates the ongoing importance of expendable launch systems in an era increasingly dominated by reusable rocket technology.

## Notable For
- Variant designation: Medium+(5,4) indicates specific configuration and payload capacity
- Military satellite launches: Primary use for United States Space Force communications satellites
- Multiple mission designations: Has launched satellites with designations USA-272, USA-275, USA-243, USA-211, USA-244, USA-233, and USA-263
- Delta rocket family member: Part of a long-standing series of American expendable launch systems
- Alternative designations: Also known as Delta 9450 and Delta-4M+(5,4) in various documentation

## Body
### Technical Specifications
Delta IV Medium+(5,4) is a specific configuration within the Delta IV family of launch vehicles. The "Medium+(5,4)" designation refers to its payload capacity and structural design, optimized for certain types of satellite deployments.

### Launch History
This variant has been primarily used for launching military communications satellites for the United States Space Force. The specific missions it has been involved with include:
- USA-272
- USA-275
- USA-243
- USA-211
- USA-244
- USA-233
- USA-263

### Design and Capabilities
As part of the Delta IV family, the Medium+(5,4) variant shares common design elements with other members of the series. It is an expendable launch system, meaning the entire vehicle is used only once and cannot be recovered or reused. This design philosophy has been standard in the space industry for decades, though it is increasingly being challenged by the development of reusable rocket technology.

### Documentation and References
The Delta IV Medium+(5,4) variant is documented in various aerospace references, including:
- Flightglobal article on new Delta IV variants
- Space.skyrocket.de documentation on Delta-4 configurations

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "Delta IV Medium+(5,4)",
  "description": "A variant of the Delta IV expendable launch system, used for military and commercial satellite deployments.",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q123456789",
    "https://en.wikipedia.org/wiki/Delta_IV_Medium%2B(5,4)"
  ],
  "additionalType": "Launch Vehicle"
}

## References

1. [Source](https://www.flightglobal.com/news/articles/boeing-introduces-new-delta-iv-variants-for-commercial-43435/)
2. [Source](http://space.skyrocket.de/doc_lau/delta-4.htm)