@JeffBezos 15m15 minutes ago 1st BE-4 engine fully assembled. 2nd and 3rd following close behind. #GradatimFerociter@JeffBezos 11m11 minutes ago Here’s one more shot of BE-4 in its transport cradle.
Good looking engine. Looking forward to seeing its hot fire performance
@torybruno Do you know when this is planned?
@TobiasVdb very soon
BE4 is the primary path to replace the Atlas' Russian RD180. Looking good
In response to Jeff Bezos' tweets:...QuoteBE4 is the primary path to replace the Atlas' Russian RD180. Looking goodhttps://twitter.com/torybruno/status/838755076449701892
doesn't sound too good for the AR-1.
Quote from: FutureSpaceTourist on 03/06/2017 01:27 pmIn response to Jeff Bezos' tweets:...QuoteBE4 is the primary path to replace the Atlas' Russian RD180. Looking goodhttps://twitter.com/torybruno/status/838755076449701892Primary path... doesn't sound too good for the AR-1.
Quote from: AncientU on 03/06/2017 07:38 pmQuote from: FutureSpaceTourist on 03/06/2017 01:27 pmIn response to Jeff Bezos' tweets:...QuoteBE4 is the primary path to replace the Atlas' Russian RD180. Looking goodhttps://twitter.com/torybruno/status/838755076449701892Primary path... doesn't sound too good for the AR-1.BE-4 was always the preferred choice for Vulcan, but the real decision will be made by the hardware when they fire these things up.
Staged combustion development testing has historically resulted in hair-pulling frustration.
Bet a cup of coffee that they'll have a half minute plus burn before June. Anyone want to bet against that?
The engine looks physically quite large compared to the notional size of the full powered Raptor. Quite curious about what this guy's TWR is...
Does the nozzle on the vac variant seem small to anyone else?
Quote from: GWH on 03/07/2017 01:24 pmDoes the nozzle on the vac variant seem small to anyone else? BE-4 is a booster engine.
The 2-stage New Glenn is 270 feet tall, and its second stage is powered by a single vacuum-optimized BE-4 engine. The 3-stage New Glenn is 313 feet tall. A single vacuum-optimized BE-3 engine, burning liquid hydrogen and liquid oxygen, powers its third stage. The booster and the second stage are identical in both variants.
Methalox appears to be more compatible with simulations than kerolox and hydrolox ever were.
Quote from: Space Ghost 1962 on 03/06/2017 09:32 pmMethalox appears to be more compatible with simulations than kerolox and hydrolox ever were.I'm curious why methalox would be easier to simulate than hydrolox. Hydrogen combustion is vastly simpler, isn't it?
Quote from: Prettz on 03/07/2017 09:26 pmQuote from: Space Ghost 1962 on 03/06/2017 09:32 pmMethalox appears to be more compatible with simulations than kerolox and hydrolox ever were.I'm curious why methalox would be easier to simulate than hydrolox. Hydrogen combustion is vastly simpler, isn't it?I'm not sure but I think it's because, scientifically speaking, hydrogen is a pain in the ass and just likes to be different...
https://arstechnica.com/science/2017/03/blue-origins-new-engine-isnt-good-enough-for-some-congressmen/