Also over at the Orbiter Space Flight Simulator Forum in this thread one guy did an interesting triangulation:
Search found 13 matches
- Mon Dec 14, 2009 12:59 pm
- Forum: General
- Topic: Russian Rocket Spiral
- Replies: 28
- Views: 12078
- Mon Dec 14, 2009 12:23 pm
- Forum: General
- Topic: Russian Rocket Spiral
- Replies: 28
- Views: 12078
- Wed Nov 11, 2009 10:04 pm
- Forum: Implications
- Topic: Rocket thrust
- Replies: 98
- Views: 78825
Mindblast, Would you really want all that spattering on your grids? Well i'm not sure.. i mean the usual figures for a polywell are like 20% thermal power anyway. I guess a lot if not most of that would be on the grids, so obviously they would have to be able to handle like 1.2GW thermal load in a ...
- Wed Nov 11, 2009 3:54 pm
- Forum: Implications
- Topic: Rocket thrust
- Replies: 98
- Views: 78825
I was contemplating about the same things a while back for an Addon i'm working on for Orbiter. At first i wanted to use Superconducting electric ducted fans too but then it occured to me that the equipment to step down the voltage for a couple hundred megawatt would be insanely heavy. The alternati...
- Fri Oct 16, 2009 10:07 pm
- Forum: General
- Topic: All you rocket scientists, an asteroid problem to work on.
- Replies: 19
- Views: 6937
- Wed Oct 14, 2009 10:14 pm
- Forum: News
- Topic: Advanced Deuterium Fusion Rocket
- Replies: 25
- Views: 12123
At one time I was constantly trying to start a discussion about using a polywell for propulsion. Specifically, I was speculating as to what a design would look like that could use the high speed alphas (from pb11 fusion) directly as reaction mass. For some reason, no one seemed to think the idea wa...
- Thu Oct 08, 2009 9:38 pm
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
Well the MHD Extractor would probably not be used at all in cruise flight. I got the general inspiration to use such a device from this paper: http://gltrs.grc.nasa.gov/reports/2003/TM-2003-212612.pdf The idea was to use the Extractor for high mach numbers when the inlet gets more and more inefficie...
- Thu Oct 08, 2009 11:36 am
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
As far as I know, the SABRE precooler is still expected to work. A piece has been manufactured and demonstrated, and they've solved the icing problem. Yes i found this paper: http://www.reactionengines.co.uk/downloads/JBIS_v54_199-209.pdf Thats also where i got the impressive value of up to 3000 m^...
- Thu Oct 08, 2009 11:08 am
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
Its just those first few hundred meters per second dv before the ram-air effect is possible. Twelve seconds at 3gees to boost upto 350m/s. Early designs such as the Saenger Silverbird and Soviet Keldysh used sleds, but the efficiency of QED/ARC makes a sled superfluous. Twelve seconds of low altitu...
- Wed Oct 07, 2009 1:54 pm
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
Well my current idea here is to just use some ducted fans driven by turbines in the reactors cooling loop for taxiing/takeoff/climbout and acceleration to M0.9 or so. This would give the thing the capability to start and land on a normal airport and also gain some altitude before switching to airbre...
- Tue Oct 06, 2009 10:34 am
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
I got some inspiration from the SABRE research.. especially the possible density of the heat exchanger (3000m^2 / m^3, whoohooo). The thing is, Skylon is supposed to fly atmospheric up to around Mach5 i think and it uses LH2 for cooling all the time. What i'm trying to do with this Addon is fly with...
- Sun Sep 20, 2009 3:06 pm
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
Yes i think i've read that paper before. I think my problem with the ISP calculations is that i didn't take into account ionization energy. That one is huge.. i just calculated about 650MJ/kg for H2. So depending on the degree of ionization of the H2 at ~2000K the ISP in the calculations of Dr. Buss...
- Fri Sep 18, 2009 5:46 pm
- Forum: Implications
- Topic: QED-ARC Engine ISP figures
- Replies: 19
- Views: 21434
QED-ARC Engine ISP figures
Hello all, i'm in the process of developing an addon for Orbiter, the free spaceflight-simulator. ( http://www.orbitersim.com ) What i want to do is a SSTO spaceplane using Polywell reactors, inspired by the design proposed by Dr. Bussard for example in this paper: http://www.askmar.com/Fusion_files...