Tag: engine-design

59 Why is SpaceX considering Methane as fuel for their next engine, the Raptor? 2013-12-18T14:24:13.393

35 Why are rocket engines operating above 100% often considered nominal? 2014-10-29T10:38:03.070

26 Why cool engines with fuel as opposed to oxidizer? 2017-05-04T03:02:08.327

25 Why doesn't the US use European rocket engines? 2015-02-25T20:33:35.247

25 Why did it take so long for methane to be used as a rocket propellant? 2015-10-01T11:59:59.680

23 Why are Rocket engines at the base of the rocket? 2015-06-28T15:44:52.193

23 Does the NK-33 engine require subcooled kerosene so cold that it turns to wax? 2016-03-15T08:09:44.980

21 How realistic would the Sea Dragon engine be to produce given today's technology? 2016-06-23T15:00:44.383

20 What's so special about SpaceX's Raptor rocket engine with 300 Bar chamber pressure? 2016-10-25T21:59:07.840

19 Why is the SABRE engine curved? 2015-11-03T20:49:25.700

18 Are nuclear-powered engines the way to go for space exploration? 2013-10-10T07:52:30.823

17 Why do pressure fed engines have combustion instabilities? 2013-08-03T17:47:04.103

17 Why aren't linear aerospike engines in common use? 2013-12-03T00:43:21.700

17 Can ion thrusters be scaled up? 2015-03-30T02:17:41.727

16 Why design new rocket engines instead of using the existing types? 2015-09-12T09:51:31.623

16 Was the third shuttle engine any different from the others? 2016-01-25T07:09:05.207

15 Could a rocket engine be designed to use different fuels? (Like LOX+H2, LOX+CH4) 2014-06-10T17:43:50.107

15 Why the non-symmetric design of rocket nozzles? 2014-09-16T10:31:41.497

14 Why is the Russian approach to the aerodynamics of their rockets different? 2015-01-31T22:44:00.767

14 What is that second (smoke) exhaust on a rocket engine for? 2016-06-17T09:08:00.403

13 What are the consequences of NASA validating this "impossible" space drive? 2014-08-01T07:49:14.233

13 What NASA documents did SpaceX use to design their engines? 2015-02-21T16:14:18.847

13 Pumped propellant propulsion - is it viable? 2015-04-19T12:26:29.537

12 Efficient types of nozzles used in rockets 2013-08-11T10:02:42.000

12 Are MMH and UDMH interchangeable? 2013-08-11T23:24:47.260

12 Is there any rule for rocket engine nozzle proximity from each other? 2015-03-25T13:21:08.177

12 SpaceX's ITS - why gimbal only the inner cluster? 2016-10-02T02:04:13.203

12 The principle behind regenerative cooling? 2017-03-14T11:06:39.287

11 At what travel distances are ion engines faster and more efficient than conventional fuel engines? 2013-07-16T21:09:51.883

11 Changes made to ISRO GSLV-D5's CUS and FBTP since GSLV-D3's LH2/LOX CUS failure to sustain ignition? 2013-08-10T23:22:16.147

11 Can a rocket motor be shut off after ignition? 2013-08-25T18:06:51.560

11 Why the huge thrust difference between a Sea level and Vacuum J-2 engine? 2014-02-13T17:52:51.110

11 Quality vs. Quantity for Rocket Engines 2014-09-21T19:57:08.793

11 Did the Apollo F-1 engines gain weight during flight? 2015-06-12T14:24:11.710

11 Do rocket engines have shock absorbers? 2016-05-30T03:19:26.923

11 Merlin 1D Engine Throttling 2017-07-01T17:26:01.987

10 Why was the NERVA program dropped? 2013-08-10T05:09:37.453

10 Why was the Apollo CM main engine thought to be unreliable on Apollo 13? 2013-09-24T17:29:15.123

10 Can a booster be designed to withstand 10,000 Gs? 2014-02-12T15:40:34.427

10 Dangers of launching a nuclear thermal rocket 2014-05-19T18:38:33.253

10 How will the SLS first stage be supplied with engines? Copy manufacturing the RS-25 or replacing it? 2014-12-01T17:36:40.090

10 Disposition of the Oxidizer Tank in Rockets with Autogenous Pressurization 2014-12-10T23:57:32.307

10 Why don't rockets drive the turbopump from the combustion chamber? 2015-12-04T07:34:16.893

10 Did any rockets use differential throttling instead of gimbal? 2017-09-05T15:02:45.990

9 How does a thin metal rocket engine not get crushed by the weight of the flying rocket? 2014-03-25T14:00:27.557

9 What was the first rocket to use gimbaled thrust? 2014-10-24T03:36:59.963

9 Practical limits to a restarting a main rocket engine in orbit? 2015-02-01T19:11:33.877

9 What is the temperature inside a methane/oxygen rocket engine? 2015-07-01T17:08:07.183

9 If it is difficult for Merlin engine to have deeper throttling, could it be as an option a different engine at the center of the rocket? 2016-05-05T18:51:53.737

8 Any other countries/companies doing anything similar to British Skylon SSTO? 2013-08-09T01:29:38.810

8 How does liquified natural gas compare to liquid methane? 2014-09-17T21:25:44.523

8 Do modern CFD codes reduce the number of test firings in an engine program? 2015-02-27T10:09:04.693

8 Multiple engines vs one engine with multiple combustion chambers 2015-11-30T09:51:50.117

8 Why not use tap-off gas for repressurization for a simple rocket engine cycle? 2016-04-03T18:59:33.037

8 What was the maximum thrust of the Rocketdyne F-1 engine? 2016-12-17T14:57:23.110

7 How does a launch vehicle control its trajectory during the first stage? 2013-11-18T23:10:30.880

7 How are nuclear thermal reactors designed for cosmic rays in space? 2015-10-30T03:55:04.430

7 Has any work been done on alternatives to rolling element bearings in rocket turbopumps? 2016-04-15T08:46:40.703

7 Would reusability affect the performance of a rocket engine compared to a single launch version of that rocket engine 2016-04-27T21:13:38.477

7 How is a rocket engine started? 2016-06-16T20:15:39.713

7 Rocket Engine Plumbing: Still don't understand the Full Flow Staged Combustion Cycle 2016-10-07T03:30:20.813

7 Rocket Throttle vs. Jet Throttle 2016-12-20T16:31:04.467

7 Is ISP all there is to engine efficiency? 2017-05-28T04:31:56.283

7 How are rocket nozzles made? 2017-06-17T20:04:22.483

7 What are the advantages of Ox-rich staged combustion? 2017-09-08T13:17:28.130

6 Is there a diagram of different nozzle diameters to scale? 2013-12-31T01:13:35.680

6 Have the micronewton thrusters developed for the LISA mission been flight tested yet? 2014-02-20T12:59:32.500

6 Does the Falcon 9 v1.1 form a shock diamond when in flight? 2014-09-08T03:34:10.457

6 What sort of analysis was performed before "modern" computing and the invention of finite element analysis and computational fluid dynamics? 2015-01-16T13:20:20.780

6 Is pogo oscillation a risk in hybrid motors? 2015-09-05T16:20:54.623

6 Could oxygen be used in a resistojet in a vacuum environment? 2016-02-24T23:00:11.337

6 How to prevent melting too much paraffin in a hybrid LOX-paraffin rocket? 2017-01-19T11:19:16.180

6 What are the issues and concerns related to turbopump blade cracks and manned spaceflight? 2017-02-03T03:11:01.103

6 How is chamber pressure and temperature determined for cold gas thrusters? 2017-05-19T15:40:36.560

6 TR-106 under-expansion in sea-level test? 2017-07-20T05:31:07.527

6 How does turbine power output of a full-flow staged combustion engine compare to Oxygen-rich staged combustion? 2017-12-07T18:05:16.940

5 What is the procedure to stop the descent engine on the Apollo 11 LEM? 2015-07-28T20:24:57.943

5 What's the nature of hoop stresses on a rocket nozzle? 2015-08-13T04:36:11.163

5 Is a fluorine/hydrogen engine feasible for use in space? 2015-09-12T21:18:48.023

5 What upgrades does the Merlin 1D need to increase its time between overhauls to 1000 hours? 2015-09-16T02:39:58.837

5 What challenges are there for more, smaller liquid fuel engines instead of one large? 2015-11-30T09:37:51.153

5 What are the phases of ignition (and flameout) of a liquid fuel engine? 2015-12-19T23:05:52.057

5 Falcon 9 engine ignition sequence 2015-12-22T17:25:52.080

5 Build an engine that burns tholins 2016-12-31T17:39:50.827

5 Overcoming pressure differential to feed fuel into rocket engines 2017-01-03T03:30:38.370

5 Understanding Von Braun's Math: Theoretical Isp 2017-08-18T02:54:23.540

5 What is the current status of EmDrive engine? 2018-01-18T03:02:36.410

4 Could the Bloodhound Rocket Car be launched into orbit? 2015-04-18T14:39:23.837

4 In turbopump designs where no propellant is dumped overboard what causes efficiency loss in engines? 2016-03-25T16:36:15.057

4 Can someone tell me the effect on performance of overexpanded nozzles? 2016-04-13T19:54:55.783

4 What is the 'Summerfield criterion' regarding rocket exhaust expansion 2016-10-07T22:41:27.927

4 How much propellant is "wasted" in the gas generator power cycle? 2016-10-13T23:57:13.823

4 Is it possible to estimate the nozzle characteristics of the Rocketdyne HG3 engine? 2017-01-06T12:10:44.090

4 Ribbed rocket nozzles 2017-02-11T19:51:39.370

4 Electromagnetic engines in heavy radiation regions 2017-04-22T21:04:58.480

4 What are the two very large "blue" cylinders attaching to the combustion chamber of each Rutherford Engine? 2017-05-21T13:28:16.633

4 What kind of forces and response times/accelerations are needed to gimbal a mid-sized nine-engine rocket's engines? 2017-05-22T15:14:35.367

4 How is chamber pressure determined for rocket engines? 2017-06-02T14:11:59.470

4 How can phenolic (resin?) handle rocket engine nozzle temperatures? 2017-06-18T02:23:05.717