Where did i say a complete rocket?? I did not claim that.Sources are per the press info released by said companies and IR filings. It has a very similar arrangement to Antares for initial production.
Kerolox tap-off?That is quite novel, and much more interesting than the usual GG system.It offers a potentially lighter and simpler system. The joker (from the J-2S work) was ducting the hot, fuel rich combustion gas. With kero you're looking at possible clogging with the unburned fuel if its slowed down too much or gets too cold. Not necessarily an issue for a single use engine, provided it's not test fired too many times to clog it up. AS it's a "full flow" engine it should offer a few more secs Isp at the same chamber pressure. Important for a low mass system.
Proprietary & patented ”crossfire” injector –industry leading performance, cost & simplicity
Firefly and Skyrora are closely related companies - so no surprise if they share not only investors but also development resources.
The attempt at a rebuttal to the Snopes story about Firefly being funded by dating site scams is deeply weird. https://noosphereventures.com/wp-content/uploads/2020/02/Statement.pdf
Quote from: russianhalo117 on 03/04/2020 07:24 amWhere did i say a complete rocket?? I did not claim that.Sources are per the press info released by said companies and IR filings. It has a very similar arrangement to Antares for initial production.Perhaps I misunderstood. To me, building stages means building a rocket. I guess if not rocket stages, I'm not sure what you are implying will be/currently is being built in Ukraine. If you have a link maybe I'd understand better.Quote from: john smith 19 on 03/04/2020 06:26 amKerolox tap-off?That is quite novel, and much more interesting than the usual GG system.It offers a potentially lighter and simpler system. The joker (from the J-2S work) was ducting the hot, fuel rich combustion gas. With kero you're looking at possible clogging with the unburned fuel if its slowed down too much or gets too cold. Not necessarily an issue for a single use engine, provided it's not test fired too many times to clog it up. AS it's a "full flow" engine it should offer a few more secs Isp at the same chamber pressure. Important for a low mass system. It is certainly interesting- and I would suggest not based primarily on some legacy engines, as to my knowledge no one has built kerolox tapoff engines before. Further evidence that it is at least partially a new design here, for instance:https://www.sprsa.org/sites/default/files/presentations/Salwan-Firefly%20Aerospace%20-Cygnus%20Secondary%20and%20Hosted%20Payload%20Opportunities-Not%20for%20Website.pdfQuoteProprietary & patented ”crossfire” injector –industry leading performance, cost & simplicityThe tapoff cycle is generally considered to be open, not closed- not all propellants are exhausted at high temperature and pressure (I assume that's what you meant by full flow?). It is a simplification and weight reduction though. And I would agree that power fade is a potential concern, but I'm not convinced that it is more of an issue than you'd have on a GG engine (where you also duct hot, fuel rich gas to the turbine).
Quote from: Ben on 03/04/2020 05:02 pmThe attempt at a rebuttal to the Snopes story about Firefly being funded by dating site scams is deeply weird. https://noosphereventures.com/wp-content/uploads/2020/02/Statement.pdfDoes it really matter where money comes from.
The base structure ie tanks and downcomer for initial serials.Some ARH presser info. Doesn't go into full details. Other info has several components derived from Bantam family.https://firefly.com/aerojet-rocketdyne-and-firefly-aerospace-to-provide-flexible-access-to-space/
Orbital debris mitigation is crucial for the future of the Low Earth Orbit (LEO) economy. Firefly is proud to be launching the Spinnaker 3 drag sail prototype on the first flight of our Firefly Alpha launch vehicle. https://www.thespacereview.com/article/3887/1 #Firefly #MakingSpaceForEveryone
Today we completed assembly of our structural test stand (TS4). TS4 allows us to apply flight-like loads to fully fueled stages to verify that our structural systems will succeed in flight.
Firefly’s ability to design, construct and operate our own large-scale test stands is something that sets us apart from other new entrants in the small satellite launch industry. #Firefly #MakingSpaceForEveryone
Firefly targets summer launch, unveils plans for lunar delivery serviceCompany pressing ahead despite COVID-19 pandemic.ERIC BERGER - 3/24/2020, 7:35 PMNASA's Artemis plan to return humans to the surface of the Moon has gotten the lion's share of public attention over the last year, but the space agency's innovative program to deliver material to the surface of the Moon has arguably spurred more commercial activity.
I hope that plume render annoyed Markusic as much as it does me. That is an overexpanded nozzle in dense atmosphere, which the moon, by most accounts, is significantly lacking.
FCC permit application for June 23 launch: File Number: 0617-EX-ST-2020 Call Sign: WQ9XJE
Quote from: gongora on 04/09/2020 03:07 pmFCC permit application for June 23 launch: File Number: 0617-EX-ST-2020 Call Sign: WQ9XJEI wonder if there is a typo in the "operation end date". Firefly was talking of a launch "towards fall", and isn't a launch period of just 1-2 days very unusual? Or could this just be a rehearsal for filing FCC requests?
During these challenging times, Firefly continues to make substantial daily progress on the path to Alpha first flight this summer. Qualification testing of the world’s simplest high-performance rocket engine (“Reaver”) is progressing well. Crank it up!
.@Firefly_Space completed work on its mission control center at Vandenberg's launchpad SLC-2 in California as the company prepares for the first launch of its Alpha rocket later this year.
