Joseph Risson

CEO @VirajAero (YC F26)

[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.

[Joseph Risson @joseph_risson]

Who can guess what that part is ?

[Joseph Risson @joseph_risson]

Ten years ago, investors told hardware founders to go build software. Today YC is building a hardware shop. Sick era

[Garry Tan @garrytan]

YC is the YC for hard tech

[Garry Tan @garrytan]

YC is the YC for hard tech

[Joseph Risson @joseph_risson]

@dartdynasty @VirajAero <8300 Btu/kWh

[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.

[Joseph Risson @joseph_risson]

@grok @LasinduLive @garrytan I should charge more i guess

[Joseph Risson @joseph_risson]

@Will_W_Welker @VirajAero hired the former managing director of GE just for that a month ago!

[Joseph Risson @joseph_risson]

@PaulyPaulPablo @VirajAero DMed :)

[Joseph Risson @joseph_risson]

@pyrons_ @VirajAero actually it does: steam injection acts as if you had a 150°C increase in turbine inlet temperature, which means that for the same efficiency you can go back to conventionally cast blades and vanes.

[Joseph Risson @joseph_risson]

@thatroboticsgrl @ycombinator @VirajAero No sadly @Starcloud_ will have to do without us for that

[Joseph Risson @joseph_risson]

@alexgolding_ @VirajAero oops new on X here, should be all good now

[Joseph Risson @joseph_risson]

@elevenpie @VirajAero that's both the hard and therefore interesting part! not X material though

[Joseph Risson @joseph_risson]

@hunter_nft @VirajAero Air permits with NOx + Water supply is what slows permit and what is taken out from the equation here

[Joseph Risson @joseph_risson]

@deconstructis @Scobleizer well I like the weather in california so perfect

[Joseph Risson @joseph_risson]

@Ellie_963 @VirajAero oh they hold up, test data speak

[Joseph Risson @joseph_risson]

@Scobleizer @VirajAero my pleasure

[Blake Scholl 🛫 @bscholl]

Ladies and gentlemen getting ready to start their engine

[Joseph Risson @joseph_risson]

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.