Joseph Risson (@joseph_risson) header
Joseph Risson (@joseph_risson) profile picture

CEO @VirajAero (YC F26)

San Francisco
Joined September 2026
Photo by Joseph Risson (@joseph_risson)Photo by Joseph Risson (@joseph_risson)Photo by Joseph Risson (@joseph_risson)Photo by Joseph Risson (@joseph_risson)Photo by Joseph Risson (@joseph_risson)Photo by Joseph Risson (@joseph_risson)
Today we launch @VirajAero (YC F26). We built a turbine to fly. Now it powers data centers: it makes its own cooling water from the exhaust, gets 40% more power from the same fuel, and gets permitted in weeks. No water connection, no wait for the grid.
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Investors ask for traction. Here’s 4 engineers who can’t stop staring at a turbine. (My CTO sent me this picture of the team yesterday. I've been away a few weeks now, should I be worried ?)
I want to be José
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First gas turbine producing power+water being built.
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Joseph Risson retweeted
Replying to @garrytan
love that it started as an aircraft engine. built for planes where you cant carry water, then data centers in the desert turned out to have the exact same problem
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Gas turbine being mounted on its skid ! Go team
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Who can guess what that part is ?
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Ten years ago, investors told hardware founders to go build software. Today YC is building a hardware shop. Sick era
YC is the YC for hard tech
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Joseph Risson retweeted
YC is the YC for hard tech
Today we launch @VirajAero (YC F26). We built a turbine to fly. Now it powers data centers: it makes its own cooling water from the exhaust, gets 40% more power from the same fuel, and gets permitted in weeks. No water connection, no wait for the grid.
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Joseph Risson retweeted
Ladies and gentlemen getting ready to start their engine
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We build at @VirajAero the engine that drinks its own exhaust, and we're making it fly. Steam injection cuts fuel burn up to 40% and slashes emissions, but lack of water kept it on the ground. Our fix: condense the water straight out of the exhaust. Closed loop, no tanks.
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