Message posted by quellish (Member since 06/26/2008) on August 24, 2024 at 18:34:06 PST:
> The Aerojet Rocketdyne subsidiary of the company L3Harris Technologies has been tight-lipped regarding whether ethylene was used for the ramjet portion of the TBCC engine it developed for the FRV, or if it built a hydrocarbon fuel production/storage facility for the fuel for the FRV It used conventional hydrocarbon fuel. The Blackswift and later Lockheed-Aerojet studies used an F100-series engine as the basis of a turbine based combined cycle power plant. NASA and DARPA continued these propulsion studies with other, smaller power plants (because the smaller engines could be ground tested easier at flight speeds). The whole point of these studies was trying to make progress on a TBCC propulsion system where the gap between the top speed of the turbine and the "start" speed of the ramjet/scramjet/whatever is small enough to make the engine feasible. Which meant making the ramjet/whatever start at a slower speed and push the turbine to operate at a higher speed. All of these studies centered around that - not the aircraft. The aircraft was the easy part!
In Reply to: Re: Sandboxx: Evidence is mounting that Lockheed Martin’s SR-72 could be in production posted by Vahe Demirjian on August 24, 2024 at 12:30:17 PST:
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