Armstrong type (alternate reality)
The Armstrong-type was a type of starship used by Starfleet in the mid-23rd century. This type was unique for Starfleet in that some of its ships were painted brown.

History 

A ship of this type, the , participated in the combat prior to the destruction of Vulcan in 2258. ()

A year later, two ships of this type were at  prior to the 's departure to Qo'noS. One had a brown-colored hull and the other had a gray-hull. ()

In 2263, an Armstrong-type was docked behind the Enterprises berth at Starbase Yorktown. ()

Specifications 
A typical ship of this type had two outboard nacelles and an inboard nacelle. These nacelles were connected by swept pylons to the underside of the primary hull. Similar to the  starship in the prime reality, an Armstrong-type starship was equipped with a rollbar module. Extending from the trailing edge of the primary hull, and connected to the rollbar by smaller pylons, there was a structure housing the impulse drive.

Ships commissioned
 
 Unnamed

Background
John Eaves provided concept input on the designs of the Starfleet ship classes built for Star Trek, including the Armstrong-type. (Star Trek - The Art of the Film, pg. 58-59.)

 was depicted in concept art from Star Trek - The Art of the Film as a brown colored ship of this class. According to the ization of , the Excelsior also participated in the Battle of Vulcan.

bg:Тип Армстронг
ja:アームストロング型
Federation starship classes (alternate reality)