"It's just in case."PotluckElon Musk, SpaceX CEO, offered to help United Launch Alliance (ULA), in a humorous exchange on Twitter.Musk was invited by CEO Tory Bruno to witness the development of ULAs Vulcan Centaur rocket. He offered to bring some spare engines, I mean, just incase.Bruno said, "Thank you for your kind offer." Bruno replied, "But, I hear your bird flies [sic] with quite some and I wouldnt wish to leave you without," likely referring to SpaceX's plans to attach more than 30 Raptor engines onto its Super Heavy Heavy Heavy Heavy Heavy Heavy rocket.Musk's more friendly side was revealed in the jovial exchange, even though he is still as likely to attack his enemies online.AdvertisementAdvertisementVulcan CentaurULA has been working on the Vulcan Centaur rocket, a two-stage heavy-lift launch vehicle. It is the spiritual successor of the Atlas V rocket and Delta IV rockets. It can lift up to 15,900 lbs to geosynchronous orbit and 52,900 lbs to low-Earth orbit.It is designed to launch payloads for the US Space Force and intelligence services. It is currently scheduled to launch its maiden voyage next year.Rocket company Dynetics has been assembling the rocket. This is notable considering Dynetics competes with SpaceX for NASA's Human Lander Systems contract. Dynetics filed a protest against NASA's choice to select SpaceX to build a lunar lander to crewed missions to Moon in 2024.Although it is unlikely that Musk would be serious about his offer to ULA, adding a few Raptor engines wouldn't have been a problem.AdvertisementAdvertisementBruno replied in a tweet to Bruno when he was asked if Raptors could be used by Vulcan. Rocket and engine were designed together. This was a joke.Musk: Elon Musk Quietly Fires the President of NeuralinkFuturism readers are invited to join the Singularity Global Community. This is our parent company's forum for futuristic science and technology discussions with other like-minded people around the globe. Sign up today to get started!