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Lightest Eve Lander

RocketBlam
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Nao

Nao

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Posted (edited)
That makes my rocket symmetry OCD twitch uncontrollably. Did you manage to get it into orbit from Eve?

Take that! ... And That!... and that...

rcOJ8g9l.jpgf54Cad5l.pngy2STD5bs.jpg

(1st one used every part available once to get to space, 3rd one actually worked as SSTO and 2nd... was fun :D)

It didn't make it? Noooooo!!! Do you think it could, with perfect piloting?

Yeah, I think takeoff from <=6500m should have been the challenge. (That disqualifies your plane, of course...) Is a plane still lighter if not going for a ∆V requirement?

Hmm *maybe* from the tip of the tallest mountaintop it could ascent. The craft looses too much dV on the last stage as it is underpowered, (ascent from 6500m had maximum vertical speed of around 400m/s in vertical flight, if the ascent from 7600+m can get that to 600+m/s vertical velocity before the last stage then *maybe*.

I don't mind dsq really but currently my craft is in compliance with rules posted by OP.:P

If we were to use altitude rule, it would be best to make another thread. 3000m/s or lower would be a better number as even 3km is hard to come by in some areas.

Kasuha made a pretty nice relief of 3000m+ locations on Eve here in this post: http://forum.kerbalspaceprogram.com/threads/77512-6-KM-or-higher-locaitons-on-Eve?p=1111818&viewfull=1#post1111818

Late edit:

Nao, with that many control surfaces your craft is considered using the infiglide exploit....

Uahh missed that post... sry

Honestly i have no idea, but there are three things about infiniglide:

first: it only really works when the control surfaces are being deflected (biggest amounts of infini-power is generated when they are flapping)

second: there is some residual phantom forces when at high static deflection of control surfaces (idk how much, but from experience it only works when on ground)

and last but not least its the mass ratio, around ~1 control part per ton is barely enough to keep the plane flying with maximum flappage. (when the mass approches zero this happens:d7lnzJos.jpg- 8km/s at sea level)

That said i like to build high lift planes (including hundreds of control surfaces) and the infiniglide problems only comes when the plane is really unstable so the surfaces flap under automatic controls. Since I fly mostly with stiff ships and without MJ / ASAS, this was never a problem.

On a side note, delta deluxe winglets provide as much lift as the big delta wings, at almost x4 less weight, and are easier to put on the craft with big enough numbers. That's why i like to use them when possible.

Edited by Nao
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bhauth

bhauth

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Nao:

Ah yes, not enough TWR on Stage 1. I edited my asymmetric craft a bit to fix that and make it easier to control, while keeping the convenient top-mounted drop tank. Still <27t and should work now. What's the best method for cheating your way to a 6500m landing on Eve?

I wasn't saying your craft should be disqualified. It is, however, sorely lacking in aesthetics. Behold: Rocketplane the rocket plane!

http://i.imgur.com/zV6jFXE.jpg

I put both of those in the same place:

www.bhauth.com/files/eve_lander_challenge.zip

Edited by bhauth
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Nao

Nao

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Nao:

Ah yes, not enough TWR on Stage 1. I edited my asymmetric craft a bit to fix that and make it easier to control, while keeping the convenient top-mounted drop tank. Still <27t and should work now. What's the best method for cheating your way to a 6500m landing on Eve?

I wasn't saying your craft should be disqualified. It is, however, sorely lacking in aesthetics. Behold: Rocketplane the rocket plane!

http://i.imgur.com/zV6jFXE.jpg

I put both of those in the same place:

www.bhauth.com/files/eve_lander_challenge.zip

Bawhaha :D, Now that's a Kerbal design! Does the crew has long enough ladder thou? :P

As for getting to eve, I'm lazy and use Hyperedit mod to teleport the ship into the Eve atmosphere at some height (~10km) and just free-fall them down. There is a nice flat 6500m area at -24.51 -162.09. But word of advice thou: it's best to make your first several landings stock and then use hyperedit, as the mod sucks up the fun from the game.

Hi there, can I enter my lander for this challenge?

24 tonnes landing

21.2 tonnes lift-off weight to a 97x97 orbit:

Unfortunately, quoting the OP:
This is your challenge:The lander must include an enclosed landing capsule: No "ride a chair into the hottest planet in the solar system" designs. This includes the Mk 1 Lander Can or Command Pod Mk 1, or any lander that encloses all Kerbals inside a loving, protective shell. The landing can/pod must return to orbit.
Your craft is not far off, just put a capsule on there, and expand it a little :).
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tavert

tavert

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Haven't played KSP for months, but couldn't resist this one. I had this design put together on new year's but don't think I ever actually flew the entire mission. Had to add landing gear and parachutes, then it was good to go. 19.755 tons on landing, 19.228 tons at takeoff after burning a bit of fuel to soften the landing and dropping the chutes. 8762 m/s total dV, used 53 of it to land and had 50 left over once back in orbit.

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Craft file at https://dl.dropboxusercontent.com/u/8244638/EvePod%201f.craft

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immelman

immelman

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Haven't played KSP for months, but couldn't resist this one. I had this design put together on new year's but don't think I ever actually flew the entire mission. Had to add landing gear and parachutes, then it was good to go. 19.755 tons on landing, 19.228 tons at takeoff after burning a bit of fuel to soften the landing and dropping the chutes. 8762 m/s total dV, used 53 of it to land and had 50 left over once back in orbit.

You know I blame you for making me get out and push!

Thank you for your Landing and takeoff Delta-V vs TWR graphs I've used them a lot :)

Landing Weight 21.9 Tonnes, Take-off weight 18.7 Tonnes:

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Pyranz

Pyranz

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I think I've got a <19 tonne craft. I'm about 80% certain it can get off Eve, I just need to get the damn thing there!

It can get into a 120km orbit from kerbin without even using a couple of stages. I hope it does as well on the purple planet! Can I use infinite fuel to get there? Just into orbit. It does still have a docking port for transport, but launch windows are a pain to wait for on a slow computer.

Edited by Pyranz
typo
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Red Iron Crown

Red Iron Crown

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I think I've got a <19 tonne craft. I'm about 80% certain it can get off Eve, I just need to get the damn thing there!

It can get into a 120km orbit from kerbin without even using a couple of stages. I hope it does as well on the purple planet! Can I use infinite fuel to get there? Just into orbit. It does still have a docking port for transport, but launch windows are a pain to wait for on a slow computer.

Transfer is not part of the challenge rules. I hyperedited mine to Eve orbit for expediency.

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RocketBlam

RocketBlam

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Landing precisely at that 7500m point is *very* difficult with parachutes in normal mission. Even landing at that flat spot of 6500m nearby is quite tricky. I guess he wanted something that could be actually used.

Yes, that's basically it. Rather than get into arguments over the precise amount of DV needed to get from the highest point on Eve to orbit, I established a benchmark DV that would allow you to get to orbit from a reasonably accessible place.

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Nao

Nao

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By the way, I love the vehicles you're all coming up with. :) Great creativity, just what I hoped to see. I was surprised to see a 60 ton lander, let alone what came after.

Yup, it was fun :). Although i believe at this point, tavert hit the design celling with his rocket. I managed to get 19.143t craft to orbit with 7m/s left in 5 stages but the design is almost the same: a pancake with 48-7S-es. It does require 7500+m launch point, and since both crafts are already quite efficient i guess the 8700m/s dV ended up too low to have a useful Eve ascent craft. :P

edit: added a picture if anybody wants to see the difference in designs... eQCQI5ws.png

Edited by Nao
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Redshift OTF

Redshift OTF

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Just want to say thanks for posting all your different types of landers! I will have to incorporate some of these ideas into my own Eve lander because they are pretty close to perfection. For example, I always used radial decouplers, I never thought of using the TR-2V decouplers which are a lot lighter and do the same job.

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Pyranz

Pyranz

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I have a just under 18 tonne lander, but for some reason it just keeps bugging out when it hits the surface, or falls through the surface and explodes inside the planet. If I ever get around to actually test it I'll post it. Because even if I need to add more fuel it's still way more part efficient + compact than the other best ones here.

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