Rakaydos

10 ton class RCS thrusters.

An interesting thought over at NSF concerning the BFR "petals"- When plumes from underexpended nozzles interact, there's blowback on the octoweb. The petals could well be an additional vac nozzle for that blowback, which is strongest in vacuum, even without any actuation at all. But the pressures are low enough that it could actually be run as a variable geometry nozzle, giving altitude compensation all the way to orbit. Also, if they could actuate it, pulling it right against the nozzles functions as debris shields.

That's where the folding fins come in- they can tune the taildrag to balance horizontal during reentry, kill tail drag for the flip, then while the engiles are lit, lock s-foils in landing position.

As I have heard it, Waves dont propagate correctly in universes with even numbers of spacial dimentions (2,4,6, ect) and 1 time dimention.

It also implies there's a version where some number of the engines are obscured.

Keep in mind, modern Russia is absolutely no Soviet Union. Their economy is basically the same as Mexico, who isnt trying to maintain a prestige space industry.

Premice: a large advanced-propulsion engine is only useful in space, but needs occasional servicing on earth. (Say, inertial confinement fusion pulse, or similar "it works in the lab right now, not as propulsion" designs.) Advanced engine section is aerodynamic when 6 spherical fuel tanks are removed and a waterproof fairing applied. there is a 7th fuel tank sufficent to circulrize the engine at an orbital assenbily altitude once out of the atmosphere. This is lofted by a Seadragon style ocean launch of a methalox booster that returns to launch site after putting the engine section suborbital.

There's a significant per-seat price delta. It can come out of that and still be cheaper.

Fuel costs for BFR are only 200,000 per flight. it has 40 rooms that can handle up to 6 passangers each. 480 people, gives a price under $500 per ticket. The long distance plane ticket is $700.

https://www.eia.gov/dnav/ng/ng_pri_sum_dcu_nus_m.htm 3.81 dollars per Thousand Cubic Feet, industrial pricing, for Natural Gas. (methane) https://www.eia.gov/dnav/pet/PET_SUM_MKT_A_EPPK_PTG_DPGAL_M.htm 3.292 dollars per GALLON for Kerosene.

That explains why BFR will never replace regional airlines, but that says nothing about intercontenental flights. The fuel to keep a plane in the air for 10-14 hours despite air resistance is more expensive than the fuel needed to boost BFS into a suborbital hop, which means all else being equal the BFR is actually cheaper.

Some instability during phase 1, that SAS CAN compensate for, but didnt in "hold heading" mode. Also I missed the chance to stay just inside kerbin SoI for burn 2.

That's actually a delay- earlier in the year Shotwell was echoing Elon with "early next year" for bfs hops

Found one.

A quick google for "Mars venus free return" https://arc.aiaa.org/doi/abs/10.2514/6.2000-4139

There's a free return double flyby trajectory earth/Mars/Venus/earth.

"It was all a dream simulation", because Quickload.

"Retroactive simulation" can let me hack together a mid course correction "the hard way", but I'm also very worried about tylo intercept. My usual caveman rendevus technique is a phasing orbit, but I cant really use Oberth to match tylo's orbit.

There's even a version of the idea that runs the particle accelerator continuously, such that the centrifugal force of the accelerated mass, reacting to magnets forcing them to stay in the accelerator, actually help hold up the ring.

It looks like there's another hole, intentionally designed, right next to the hole after a 90 decree corner. Some poorly maid worker probably drilled a wrong pilot hole, then capped it and drilled the right hole and hoped noone noticed.

This still seems low for a no-patched conics interplanetary rendevus. (rendevus with Tylo SoI). I can elk out a bit more with manual staging in Phase 1 and 2, but it's still rough. Thoughts? Edit: Phase 0/phase 1 fuel consumption: 10.62 fuel units/sec Phase 0 pod pair: 336 fuel units, 31.64 seconds per stage -126.5 seconds for Phase 0 Phase 1 stack pair: 1008 fuel units, 95 seconds to exaust (2 stack pairs, 190 seconds for phase 1) If this math is right, the entire jool ejection burn is over in a 5 min burn, even though it starts at around 2m/s^2

Payload dead mass 25.52t (payload circularization stage: 1239.13 m/s) Minimum DV target (Low kerbin to low tylo, minus payload circularization stage): 3950- 1239= 2711 m/s minimum Phase 3 Propulsion: Spark on lander (ISP 320) Tanks: 1 right angle.(.366 dry 2.256 wet) 27.776 Wet, 25.886 Dry, DV with no staging: 221.14 m/s Dv to reach target: 2490 m/s Phase 2 Propulsion: 1 Terrier (ISP 345) Tanks: 1 right angle, 6 Y connectorTerrier tank, (.366 dry+.406x6 dry+ .820 dry, 2.256 wet+2.296x6 wet +2.820 wet) 46.628 Wet, 31.368 Dry, DV with no staging: 1341.18 m/s DV to reach target: 1150 m/s Phase 1 Propulsion: 3 Terriers (ISP 345) Tanks: Terrier tank x2, Right anglex12 (.820x2 dry + .366x12 dry, 2.820x2 wet + 2.256x12 wet) 79.34 Wet, 52.66 Dry, DV with no staging: 1386.77 DV Reserve for bad maneuvering: 235 m/s Phase 0 strap on tanks: 8 end mount (4.352 wet, .572 dry per pair) Pair 1: 83.692 wet, 79.912 dry, DV: 156.37 m/s DV Reserve: 390 m/s Pair 2: 88.044 wet, 84.264 dry, DV: 148.31 m/s DV reserve: 535 m/s Pair 3: 92.396 wet, 88.616 dry, DV: 141.32 m/s DV reserve: 675 m/s Pair 4: 96.748 wet, 92.968 dry, DV: 134.84 m/s DV reserve: 810 m/s (Original design- requires additional launches) Pair 5: 101.1 wet, 97.32 dry, DV: 128.92 m/s DV reserve: 935 m/s Pair 6: 105.452 wet, 101.672 dry, DV: 123.5 m/s DV reserve: 1055 m/s

So in orbit, "up/down" is normal/antinormal or radial/antiradial? What I think would be amazing , though probably not related to your skillset, is to have a visualizer that uses the part data to recreate your ship in an window, with whatever part you have selected in the editor highlighted. As a stop gap, I was wondering about being able to visually change a part, load it into KSP, and figure out where it was in the ship that way. We'll see how well orienting the ship works to make it more clear.

I grabbed an old Debris with the same problem to learn the program before I tried messing with the main ship. Part 14 was attached to a decoupler (for fuel flow planning). I think I figured out manual repairs, but I notice a fuel flow irregularity in my main ship that I'd love to fix in the editor instead of in flight, but is likely to be a pain in the ass to locate. There were 5 pages of docking errors I went through and fixed in the editer. The fuel flow irreglarity is an artifact of the multidocking- the "part tree" connects one of the edge docking ports first, when I want the center port of each layer to carry fuel flow. Is there a reasonable way to identify which part# relates to a part of a structure? temporary Color edit, perhaps?

Thanks to the Alert tab, the haystack was only 5 pages of minor docking failures burying the major docking failure (and one or two other stranger issues I hadnt noticed yet). Thank you. Next up is Stage planning and DV Sanity Check. I've already spotted one problem that needs a mid-flight redock and a relaunch (it's only the "comedy of errors" center engine, though) to give the redocking part access to a probe core.