Makki

[quote name='ferram4'][URL="http://forum.kerbalspaceprogram.com/threads/139855-PSA-Eve-%28re%29entry-is-impossible-CONFIRMED?p=2301560&viewfull=1#post2301560"]And as I noted in the other thread[/URL], the failure of your rocket, Xyphos, is due to your reentry procedure, not due to Eve's atmosphere. It is perfectly possible to reenter that vehicle. Edit: as a general suggestion to anyone having reentry problems: check to see if your reentry is too shallow. The goal is to slow down, and heating is not proportional to drag. You can get more drag with less heating (proportionally) by diving deeper. That's why Xyphos's design exploded; he was too shallow. A steeper trajectory was survivable.[/QUOTE] I just tried landing on Eve again, but this time I used your approach by having a lower periapsis giving me less horizontal velocity. I entered the atmosphere with less than 2000 m/s and I managed to get below 54 kilometers just fine. Although at that point my ship flipped over and my command pod burned up in seconds. But still this was way better, and I'm sure I would have landed without problems if my ship didn't flip over. Conclusion: It's not impossible to land on Eve, my reentry path was just too shallow. Thanks for the advice btw.

[quote name='brianorca']The OP ship is aerodynamicly unstable when flying backwards. It needs more drag at the top, which is backwards from our normal launch aerodynamics. You also need a way to shift that drag to the rear again for your ascent.[/QUOTE] Yeah I think this is the main problem as well. I don't think I have the patience to design another rocket, so I guess I'll have to reduce the heating instead. I think Tourist is right about the issue that Squad is facing with this problem. Other than that thanks I guess!

Wow I just realized my posts won't be visible until a moderater has approved it (why though?). To the mods out there; Just ignore my last few posts and just keep my original post if that makes sense.

Yeah It seems that my thread somehow got deleted or something... Uhh yeah... apparently I somehow removed my post or something

So I've been trying to land on and return from Eve since May this year. It's been pretty challenging so far, and I've had to try many different designs, but none of them has worked. The biggest problem with this mission hasn't been the ascent, but rather the descent to Eve's surface. It just seems impossible to design a craft that can both decent to the surface without burning up, while also being big enough to ascent from it's thick atmosphere and strong gravity. Note: I play with Re-entry heating at 100% Note: I play stock KSP 1.05 (no mods added) Note: How do I spoiler-tag images? They take a lot of space. Keep in mind you are more than welcome to tell me about improvements I could make to my design. I don't mind being educated on this topic. This is the lander I've been using. The design was copied from another thread somewhere on this forum. As far as I've heard it should be big enough to ascent from Eve, but I haven't tried it yet. [IMG]http://i.imgur.com/BeP01Cn.png[/IMG] The lander weighs a total of 138 tonnes with parachutes, landing gear and heatshields. I also added some A.I.R.B.R.A.K.E.S to further slow down my craft as it descent into the atmosphere: [IMG]http://i.imgur.com/4WnwPfF.png[/IMG] This is a picture of the transfer stage I managed to get in orbit around Kerbin (phew that wasn't easy). It weighs a total of 967 tonnes. It also has a total delta-v of 4632 m/s , which is more than enough to get from Kerbin to Eve, and circularise the orbit. [IMG]http://i.imgur.com/lsuxGW8.png[/IMG] When I arrived at Eve and circularised my orbit, I dropped my apoapsis down to 95 km and my periapsis to 60 km. This was done to minimize the thermal heating from the atmosphere. And thus began my descent. Here is a picture of my ship at an altitude of 74 km: [IMG]http://i.imgur.com/9oYPzHB.png[/IMG] Already my ship is burning hot. In fact I'm surprised it hasn't exploded yet... Aside from that my ship also started tilting to one side, and I tried preventing that by using SAS to keep it pointed away from the heat. Sadly without success as you can see. Here's a picture of my ship at an altitude of 71.4 km: [IMG]http://i.imgur.com/UYSS2Kb.png[/IMG] At this point my Airbrakes have already exploded due to overheating, even though their job was to prevent it... And why doesn't the heat shield work... Like seriously. Also on the left notice how my 4 main engines are overheating? They are positioned directly behind the heat shield so that shouldn't even be physically possible?! [IMG]http://i.imgur.com/zY2nCTC.png[/IMG] And finally the inevitable happened. My ship didn't even get below an altitude of 70 km before it exploded. I just don't see any way for this to have been possible. It's the most frustrating challenge I've faced since I started playing KSP. And I thought Squad had fixed this issue with their recent update with the so called "Thermal Improvement" . Clearly it hasn't improved at all. And yes I could just reduce the heating from re-entry, but I consider that cheating... Might aswel remove it entirely then. KSP is such a fun game, but this problem is just too big for me to ignore. I doubt I will be playing this game for much longer if they don't find a way to fix this.

Edit: So I wrote this thread, but I couldn't submit it because I wasn't logged on. Then I logged on and rewrote the entire thing only to find that people had replied to it before I even submitted it.. what is going on? Edit 2: Nevermind the mods figured it out. Thanks. Edit 3: Title is misleading. I've come to realize that it's not "impossible" to land on Eve. I just had to lower my periapsis upon decent which would give my ship a smaller velocity going through the atmosphere. I should also have placed my heatshields on the opposite side of my ship to prevent it from flipping as it did. Hey guys I've been trying to land and return from Eve now since May this year. I've tried a few designs but none of them worked. The biggest issue with my missions to Eve were not the ascent, but rather the descent to Eve's surface simply due to overheating. I've had to give up (or at least stall) my mission now since I figured it's just not possible to get a suitable lander to the surface without it literally exploding. (atleast in the current update) Note: I play with Re-entry heating at 100% Note: I play stock KSP (no mods) Note: How do I spoiler-tag images? Here's an example which occured today. Keep in mind if any of you guys have suggestions or solutions as to why my craft overheats you are more than welcome to educate me. Here's my lander. I copied it from another thread I found somewhere in the forums. It's said to be able to ascent from Eve, but I haven't tried yet. [spoiler=Click to view][IMG]http://i.imgur.com/BeP01Cn.png[/IMG][/spoiler] The lander in the picture weighs 138 tonnes with landing gear, parachutes and heatshields. It also has some airbrakes for better braking through the atmosphere: [spoiler=Click to view][IMG]http://i.imgur.com/4WnwPfF.png[/IMG][/spoiler] Here is the transfer stage I used to get from Kerbin to Eve. Total weight in orbit 967 tonnes: [spoiler=Click to view][IMG]http://i.imgur.com/lsuxGW8.png[/IMG][/spoiler] The transfer stage has a total delta-v of 4632 m/s . More than enough from Kerbin to Eve and get a circular orbit. The mission went fine so far and I managed to get a good orbit around Eve. I lowered my apoapsis to 95 km and lowered my periapsis to 60 km. Thus began my descent. Here's a picture at an altitude of 74 km: [spoiler=Click to view][IMG]http://i.imgur.com/9oYPzHB.png[/IMG][/spoiler] My ship is already burning hot and it has also tilted a little bit to the side, but I tried preventing that by using SAS to keep my ship pointing away from the heat, without success. Here's a picture of the ship at an altitude of 71.4 km [spoiler=Click to view][IMG]http://i.imgur.com/UYSS2Kb.png[/IMG][/spoiler] At this point my Airbrakes have somehow exploded due to overheating even though their job was to prevent it... Also why doesn't my heatshields work. Like seriously... And notice to the left how my 4 main engines are overheating? They are placed directly behind the heatshields... there should be no way for them to overheat this way?!?! Geez I'm getting frustrated just writing this now. [spoiler=Click to view][IMG]http://i.imgur.com/zY2nCTC.png[/IMG][/spoiler] And then the inevitable happened. My ship didn't even get below 70 km. I just don't know what I'm doing wrong. I though Squad fixed this with their recent "Thermal Improvement" update. And yes I know I could just reduce the heating upon re-entry but I consider that cheating.. Might aswell remove it entirely then. Seriously though, this has been the most frustrating problem since I started this mission. KSP is such a fun game, but this needs to be fixed. Otherwise I don't think I'll be playing for much longer.