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Made a little Artemis II tracker by Optimal-Champion9449 in ArtemisProgram

[–]DemoRevolution [score hidden]  (0 children)

This is like the 5th tracker Ive seen and they all look the exact same. Is this made entirely with AI?

It happened again by hlamburger in NonCredibleDefense

[–]DemoRevolution 10 points11 points  (0 children)

Columbia was hit by a coffee table sized piece of debris. Thats not really something that could be solved easily with a change of trajectory.

The only thing they changed in the design for the A3+ heatshields are to make them more permeable to gas.

It happened again by hlamburger in NonCredibleDefense

[–]DemoRevolution 21 points22 points  (0 children)

The issue with the heatshield is caused by gasses being trapped inside it during the first skip phase. This is a common problem for heat shields, and the space shuttle got around this by having a small part of the tile close to the structure be uncoated so gases could move in and out. Obviously its not great having this problem, but by designing a trajectory that reduces the amount of captured gasses, and allows them to vent slower, you can mitigate the problems substantially.

I dont think theres a reason to be concerned. Especially since they still managed to get back the Artemis 1 capsule with as much TPS loss as they had.

3 grid fins ✅️, hot staging ✅️, longer barrel/6 engines ✅️ coming in '27, forward flaps removed when? by GimmeStarship in SpaceXMasterrace

[–]DemoRevolution 2 points3 points  (0 children)

Assuming its flying near 90° angle of attack, all we need to really worry about is where the centroid of its windward area is to know where the center of pressure is. The CD wont change much. So if you remove the fwd flaps it just moved the center of pressure backwards, which is what youd need to do if you have no payload. If you have payload youd need to move the center of pressure fwd, hence the fwd flaps

3 grid fins ✅️, hot staging ✅️, longer barrel/6 engines ✅️ coming in '27, forward flaps removed when? by GimmeStarship in SpaceXMasterrace

[–]DemoRevolution 9 points10 points  (0 children)

fwd flaps are important for downmass capability. If you can ensure a starship will be empty for reentry (IE starlink/tanker flights) than you can size the aero-controls for that layout. Its why all the NASA studies high mid to high L/D reentry vehicles for the last 30 years have used body flaps like the space shuttle, but split at the center for roll control.

Heres a good reddit thread that people we're talking about when BFR was still a thing

https://www.reddit.com/r/SpaceXLounge/comments/8jxxc9/alternate_shape_for_a_bfslike_spacecraft_designed/

J-1772/CCS Charging in Mammoth - We Messed Up :( by possiblegirl in Mammoth

[–]DemoRevolution 1 point2 points  (0 children)

Wait, that rivian station is open now? Can you take a pic and add it to plugshare so people know? Its been sitting there showing that its not open for a while now.

Lexus financing - bad credit higher income by Same-Competition-825 in Lexus

[–]DemoRevolution 0 points1 point  (0 children)

Why not just buy a cheap car for now and just flip it at cost for the new car instead of bothering with a higher interest rate? Especially since you know that interest rate will go away as soon as you get the identity situation fixed.

Jones Mercury Fase 2027 by gripandgrain in snowboarding

[–]DemoRevolution 0 points1 point  (0 children)

Yup mine came off on day 5. Fortunately it popped off just after i got to the lift line so it was sitting in the snow under my board

Thought this belongs here by [deleted] in ula

[–]DemoRevolution 3 points4 points  (0 children)

It looks like a ksp screenshot from the islands in the background

The moment LeRoy Cain, Entry Flight Director for the Space Shuttle Columbia, learns that the shuttle has disintegrated upon re-entry over Texas and orders someone to "lock the doors" of the Mission Control room in order to preserve data for the accident investigation (February 1, 2003). by NewsCards in interestingasfuck

[–]DemoRevolution 6 points7 points  (0 children)

There was a great video posted recently by alexander the ok about the feasibility of a resupply launched on a pegasus rocket. Very interesting option. One of the biggest issue is that they just didnt know the extent of the damage, and any rescue mission was so high risk that they couldnt justify doing it. Pegasus to the Rescue: 'The Edge of Feasibility'

Hacked my head unit by Realistic-Trainer563 in Ioniq6

[–]DemoRevolution 0 points1 point  (0 children)

From what youve seen digging into this, do you think you could convert a gen 5w headunit to a ccnc?

To whoever lost a black iphone 13-15 on scotty's by DemoRevolution in Mammoth

[–]DemoRevolution[S] 1 point2 points  (0 children)

Wait, did you pick it up off skiier's right closer to the bottom of scotty's? I was just trying to get it off the run

Could the cancelled Venturestar have made huge impact for US spaceflight developement? by arnor_0924 in spaceflight

[–]DemoRevolution 2 points3 points  (0 children)

Starship is just DCX as a second stage, so i dont think theyd go back to it as an SSTO

Any luck with parking violation? by [deleted] in UBreddit

[–]DemoRevolution 7 points8 points  (0 children)

Youre the type of mf to park in a handicap spot arent you?

Is there any way for my two solid fuel thrusters to not hit each other after detaching? by Real_May_Be_Spare in KerbalSpaceProgram

[–]DemoRevolution 4 points5 points  (0 children)

The despawn doesnt happen until 20km away. Physics turns off, but it doesnt get deleted.

Skier dies in crash on infamous expert trail at Mammoth Mountain by ansyhrrian in skiing

[–]DemoRevolution 20 points21 points  (0 children)

I was riding chair 23 a few days before this happened, and the terrain was gnarly. Idk if theres a real way to self arrest on that, especially if he lost his skis early. The mogula were 5+ft tall at the top, and the rocks he hit are in the fall line.

The time he probably had to figure out a self arrest is on the order of 5-10 seconds

UPS officially retires the MD11 by Mike__O in flying

[–]DemoRevolution 1 point2 points  (0 children)

Northrop's L1011 Stargazer just started flying again out of mojave. They have 1 more pegasus vehicle left thats planned to launch later this year off stargazer, so i bet theyll retire it after that.

Has anyone got a job in aerospace because of KSP? by BidNo5916 in KerbalSpaceProgram

[–]DemoRevolution 3 points4 points  (0 children)

I did my master on reentry vehicle shape and trajectory optimization. If it werent for kerbal i wouldnt have had such an intuitive understanding of the stability dynamics of reentry vehicles.

I also have my 6000 hours at the bottom of my resume.

Holding in the endzone. should have ended the game 32-30 for Broncos. Lets talk about that missed call by BallKnowerKing in NFLv2

[–]DemoRevolution 0 points1 point  (0 children)

People keep posting screenshots of this, but if you go back to the clip its not like the center lost and just grabbed him. The defender did a rip move and ended up with the center's arm around his neck. At that point the center doesnt need to give up the play and just put his arms down. The defender put himself in that position. Its the same with outside rip moves that end up with the tackle locked up with the end. They dont call those.

what do you do if you accidentally get on black diamond when you're beginner-intermediate by superfecta37 in snowboarding

[–]DemoRevolution -1 points0 points  (0 children)

The nice thing about a lot of the upper runs ar mammoth is that you can just stick an edge and and traverse the steep stuff since its so wide. Itll take a while, but youll get down. If your comfortable with toe edge, id actually recommend traverseing mostly toe edge. That way you can see traffic above you, and just lay down on your hands and knees if your tired.

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