Raptor Engine Testing | 暴龍引擎測試
The next key element is on the engine side. We have to have an extremely efficient engine. The Raptor engine will be the highest thrust-to-weight engine, we believe, of any engine of any kind ever made. We already have 1200 seconds firing across 42 main engine tests. We have fired Raptor for as long as 100 seconds. It could fire much longer than 100 seconds. This is just a reflection of the size of the test tanks. The duration of the firing for landing on Mars is about 40 seconds. The test engine currently operates at 200 atmospheres, or 200 bar, the flight engine will be at 250 bar, and then we believe over time we could get that to a little over 300 bar.
另一個(gè)重要的組成部分是引擎悟民。我們必須擁有一枚極其高效的引擎。目前已知的各類引擎中洒嗤，暴龍引擎推重比（thrust-to-weight ratio）最高。我們已經(jīng)在42項(xiàng)主流引擎測試中進(jìn)行了1200秒的噴火測試乓旗。我們可以讓暴龍引擎一次噴火100秒蒿赢。當(dāng)然他完全可以噴更長時(shí)間。這只是所測試的引擎燃料箱大小的一個(gè)反映瑰剃。在火星上著陸的噴火時(shí)長大約是40秒劈彪。測試引擎目前的運(yùn)行壓力是200個(gè)大氣壓竣蹦，也就是200毫米汞柱。而飛船引擎實(shí)際壓力將達(dá)到250毫米汞柱沧奴。我們相信未來（over time）我們會(huì)把這個(gè)壓力提升到300毫米汞柱痘括。
