Administrative update on COBRA/SRL and IREC

May 4, 2019

As of April 2019, COBRA has been renamed to the CU Sounding Rocket Laboratory, or SRL! This name was voted on by the team and found exceptional support. We expect to fully update our website and public materials to reflect this over the next few months. TEAM ACTIVITY UPDATES We...

COBRA Crowdfunding has reached its goal!

Jan. 19, 2019

On January 19, our crowdfunding campaign surpassed its goal. Thanks to the incredible generosity of our 28 sponsors, we will be competing in IREC with Copperhead in just a few months! Notifications and rewards will be sent out to supporters soon. Thank you! If you missed the campaign, but still...

COBRA Crowdfunding Campaign Launched

Dec. 20, 2018

Our crowdfunding campaign is finally live! We are raising $10,000 to cover the costs of developing our rockets for IREC 2019 and Spaceshot. Find the campaign here: Donations to COBRA may be made at the link above or according to the directions below. How to Support this Campaign Please...

Press release on December 1 launch

Dec. 2, 2018

BOULDER, CO, December 2, 2018 - COBRA, CU's student rocketry association, successfully launched its Copperhead rocket to an altitude of 14,583 feet yesterday at 10:50 a.m. MST. The rocket, weighing in at 55.8 pounds, lifted off on a student-built N-class solid rocket motor and broke the sound barrier to reach...

November 30 Propulsion Update

Nov. 30, 2018

The propulsion team made a significant amount of progress this semester. We constructed our own test stand for a 42mm single grain motor, built the motor, and tested it multiple times with different propellant compositions. All but one of these tests were successful. We then upgraded the main beam of...

Preparations for December launch

Nov. 21, 2018

Thanks to the hard work of COBRA's structures and propulsion teams, Copperhead is almost complete! Copperhead is the successor to our previous rocket, Ol' Murph. We anticipate launching Copperhead to approximately 11,000 feet for the first time this December. Copperhead's airframe is a four-piece assembly built from carbon fiber (wound...

Successful fire of 114 mm custom motor

Nov. 6, 2018

14 members of COBRA successfully tested our largest custom rocket motor to date on November 3, 2018 at the Pawnee National Grassland under the authorization of Northern Colorado Rocketry. The 114 mm (4 inch) diameter motor, which was mounted on COBRA's custom-designed test stand, developed over 1 kN of peak...

First Fire!

Oct. 13, 2018

On October 7, 2018, we fired our first custom motor twice on our purpose-built test stand. Achieving a peak thrust of 280 N, this small-scale motor paves the way for our future motor development and rocket launches.

Ol' Murph 1.0 and 2.0

Oct. 31, 2015

Ol' Murph was the first rocket built by COBRA (formerly University Student Launch Initiative) and USLI's founders. With a 6" diameter fiberglass body, Ol' Murph provided many problems near the end of the project. It seemed like everything that could go wrong, would. Hence, the name of the rocket in...


Oct. 31, 2015

VIPER was a two-stage rocket designed for the 2015 SEDS-USA competition. It was designed to fly under two motors summing a total of 640 N-s of thrust. After two launches, VIPER taught us a lot about avionics and timing with stage separation and ignition; however, the second launch resulted in...