All public logs

Combined display of all available logs of NPrize. You can narrow down the view by selecting a log type, the username (case-sensitive), or the affected page (also case-sensitive).

• 00:45, 6 November 2017 Vincent Sọ̀rọ̀ contribs uploaded File:Solar system exploration with cubesats.pdf (This presentation was made at SpaceUp Cote d'Azur (Nice, France) in October 2017. The goal was to explain the challenges of solar system exploration using small satellites, emphasizing that it will cost a lot of money on either launches or reliable spa...)
• 00:14, 12 March 2013 Vincent Sọ̀rọ̀ contribs uploaded File:Pegasus wings.gif (3 views of Orbital Pegasus' wings)
• 03:33, 12 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Gravity drag and thrust to weight.png (Updated with the gravity drag curve and make the image larger.)
• 03:05, 12 December 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Gravity drag and thrust to weight.png (Made with File:Rocket_mass.c v3 plus a gravity drag evaluation added in the iteration.)
• 01:42, 12 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Rocket mass.c (clarification about the propellant mass. vehicle_wet_mass is the dry mass + the burnt propellant mass, but it doesn't include the propellant taken aboard and evaporated during the ascent. The output indicates the ground value now. This is still version 3.)
• 20:59, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Isp.png (starting at 280 instead of 270)
• 20:53, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded File:DeltaV.png (Graph representing rocket dry and wet mass as function of the Delta V. Done with version 3 of File:Rocket_mass.c, overall thrust-to-weight ratio is 2.5 and Isp is 340s.)
• 20:52, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Isp.png (Graph representing rocket dry and wet mass as function of the Isp. This is clearly exponential on the left because a too low Isp means that orbit cannot be reached, the mass ratio gets too high. Done with version 3 of File:Rocket_mass.c. Delta V is 8300 m)
• 20:09, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Mass ratio.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too, and overall thrust-to-weight ratio is 2.5 instead of 1.25.)
• 20:08, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Engine thrust to weight.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too, and overall thrust-to-weight ratio is 2.5 instead of 1.25.)
• 20:06, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Overall thrust to weight.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too.)
• 20:04, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Final acceleration.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too.)
• 20:02, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Payload 0-80kg.png (fixing update)
• 19:58, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Payload 0-80kg.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too.)
• 19:57, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Payload 0-6k.png (Updated with version 3 of File:Rocket_mass.c. Delta V is 8300 instead of 9000 m/s too.)
• 13:26, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Rocket mass.c (Refining the model: better structure, more realistic fairing, adding forgotten pipes and valves, tanks alignment on outer shell, composite skirts for non-structural or soft tanks.)
• 00:26, 11 December 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Rocket model.png (Rocket model illustration for the computed rocket model: File:Rocket_mass.c)
• 03:10, 27 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Rocket ignition.png (Graph of the rocket trajectory for first moments after release, assuming ignition at the time of the release, a thrust vector with 45 deg pitch, and an overall thrust-to-weight ratio of 2. No atmosphere considered whatsoever.)
• 02:01, 24 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Heat transfer to rocket tank.c (Program calculating the heat transferred to a cryogenic tank (typically LOX) for balloon- or air-to-orbit vehicles. Two heat transfer approximations are done. * when the vehicle is waiting on the ground after tank filling and before it lifts-off from the )
• 02:59, 17 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:ISA atmospheric model.c (C Implementation of the international standard atmosphere ([https://en.wikipedia.org/wiki/International_Standard_Atmosphere ISA]) model. This is a port of http://www.digitaldutch.com/atmoscalc/ .)
• 01:37, 9 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Rocket mass tanks v3.png (tank model for rocket mass version >= 3)
• 01:36, 9 November 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Rocket mass tanks v1-2.png (white bg)
• 01:33, 9 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Rocket mass tanks v1-2.png (tank model for rocket mass versions 1 and 2)
• 03:51, 7 November 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Rocket mass.c (composite skirts, propellant venting and tank insulation (given data, not computed), mass ratio computed from delta V and Isp.)
• 02:47, 2 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Rocket mass.c (Program that iterates to compute an SSTO rocket's dry and wet mass (and other parameters). Compile with gcc -O2 -Wall rocket_mass.c -o rocket_mass -lm for normal use, and add -DMAKE_GRAPH after gcc on the command line if you want to create graph data as )
• 02:15, 2 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Payload 0-6k.png (Graph representing rocket dry and wet mass as function of the payload mass (or any other fixed mass subsystem), ranging from 0 to 6 kg payload.)
• 01:41, 2 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Final acceleration.png (Graph representing final acceleration and engine's thrust as function of the initial acceleration (overall thrust-to-weight ratio).)
• 04:47, 1 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Overall thrust to weight.png (Graph representing rocket dry and wet mass as function of the vehicle (overall) initial thrust-to-weight ratio. There is an equivalence with the acceleration in number of G's.)
• 04:45, 1 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Engine thrust to weight.png (Graph representing rocket dry and wet mass as function of the engine's thrust-to-weight ratio.)
• 04:44, 1 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Mass ratio.png (Graph representing rocket dry and wet mass as function of the mass ratio (fixed by Isp and Delta V).)
• 04:43, 1 November 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Payload 0-80kg.png (Graph representing rocket dry and wet mass as function of the payload mass (or any other fixed mass subsystem).)
• 23:38, 31 May 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Hybrid turbine.png (glimpses of an expander and minor improvements)
• 22:28, 28 May 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Thermodynamic diagrams.png (T-S diagram for the mixed/hybrid turbofan.)
• 19:18, 28 May 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Hybrid turbine.png (changing colors for background and flows)
• 19:03, 28 May 2012 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Hybrid turbine.png (background)
• 18:54, 28 May 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Hybrid turbine.png (Hybrid turbine sketch)
• 18:54, 28 May 2012 Vincent Sọ̀rọ̀ contribs deleted page File:Hybrid turbine.svg (svg not working yet)
• 18:50, 28 May 2012 Vincent Sọ̀rọ̀ contribs uploaded File:Hybrid turbine.svg (Hybrid turbine sketch)
• 01:39, 27 November 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Velocity triangles.png (Velocity triangles for axial compressor blades. Source is the chapter "2.0 Axial-Flow Compressors" from M. P. Broyce.)
• 01:29, 27 November 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Blade nomenclature.png (Nomenclature of aerofoils (used in fan/compressor/turbine blades). Source is the chapter "2.0 Axial-Flow Compressors" from M. P. Broyce.)
• 20:08, 2 November 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Combustor sketch section.jpg (Sketch of the combustor cross-section. The green part is the shaft, the transparent light blue part is the core shell.)
• 19:36, 2 November 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Engine core and fan.jpg (Sketch of the engine, with the core and the fan duct, aft-mounted fan and first stage compressor rotor drafted. The chamber is in red/brown.)
• 19:35, 2 November 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Engine core and fan side.jpg (Sketch of the engine, with the core and the fan duct, aft-mounted fan and first stage compressor rotor drafted. The chamber is in red/brown.)
• 23:27, 9 May 2011 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Compressor blades.svg (white bg)
• 23:26, 9 May 2011 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Compressor blades.png (white background)
• 23:20, 9 May 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Compressor blades.png (Compressor blades 2D schematics.)
• 23:20, 9 May 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Compressor blades.svg (Compressor blades 2D schematics (source SVG file).)
• 20:58, 28 February 2011 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Blade fixation simple.jpg (fixing display artefact)
• 20:56, 28 February 2011 Vincent Sọ̀rọ̀ contribs uploaded File:Blade fixation simple.jpg (Simple way of fixing blades: insert is parallel to the shaft and a spacer is used to hold them together, actually composing the fan hub.)
• 20:23, 28 February 2011 Vincent Sọ̀rọ̀ contribs uploaded a new version of File:Compressor side.jpg (yellow shaft)