Redshift OTF
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Posts posted by Redshift OTF
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@NightshineRecorralis You can get an Orange tank to the Mun? That is most impressive! Maybe if you replaced the cargo bay section with a fuel tank you could get some monster Delta V in orbit.
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Managed to break my record with this badboy:
8056 Delta V. The TWR of the LV-N's is abysmal but I guess it's enough to go to Eeloo and back.
I also discovered something new. If you replace quad-couplers with nose cones attached to another object, say a small fuel tank it doesn't really help with drag. What happens is the drag of the nose cones and everything attached behind them is transferred to the object they are attached to and the object becomes incredibly draggy even if it is a low drag object. I then had a brain wave and knowing that wing strafes have pretty low drag I placed 2 of them behind the cockpit and attached the nose cones to that. In this case they didn't transfer their drag to the wing strafes and my overall drag was a lot less.
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5 minutes ago, Nefrums said:
You would need 3 nervs to land a ship this size on Eeloo, 2 might be possible as you would burn most of the fuel to get there.
A SSTEeloo would need around 6km/s dVif you do direct transfers, with gravity assists you could probably do it for half that.
Yeah Mark Thrimm did it in 1.0.5 and needed 6500 Delta V with gravity assists. It definitely influenced me to make something with more Delta V to make the voyage less painful. And he didn't have a cockpit. I wonder if a non-Ion Moho SSTO is now possible?
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7 minutes ago, Foxster said:
Comparing these two...
With the first one, the nosecones have a max drag (launching vertically) of 4 x 1.62.
On the craft with the quad adapter, the max drag of the adapter is 82.
Also, the drag of the tanks and engines is less on the first craft.
So, clearly radially attached nose cones are waaaay less draggy. Though the mass is slightly higher. You also want a nosecone of some type on the bottom of the central tank.
1 minute ago, Nefrums said:Yes even the Mk2 bicoupler is very draggy.
Consider myself educated on this matter. I will have to ditch couplers and try this design although it might be a bit tricky mounting a lot of these. I'm slight wary about using just 1 LV-N as I was hoping to make an Eeloo SSTO and I'm worried that 1 LV-N won't have enough TWR to land on it or even to do the interplanetary transfers efficiently enough. A challenge is a challenge though!
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12 minutes ago, Nefrums said:
Woah. Consider my entry wrecked! Lol. Yeah it looks like side pods are the way to go. And avoiding Mk2 parts as they are very draggy.
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7 minutes ago, Foxster said:
Those quad adapter are incredibly draggy. I think you might find a few more dV if you could find a way around them. Like four radially attached Advanced Nose Cone - Type A.
They are very draggy but most of the rest of the craft has low drag so I get better returns as I increase the size of the craft. I like your idea though although I thought anything added radially to a craft counts as a side pod that increases drag more? Is this no longer the case? If not then I can go a lot further with this design line!
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36 minutes ago, Foxster said:
Umm, if you are using KSP1.2 then MJ should take account of the fuel in the wings for the dV - at least it does in the latest dev version of MJ.
Thank you! I was using an older version. I have upgraded now and have an improved SSTO to reveal:
Spoiler
7419 Delta V. This one only just got to orbit though. I got up to 60km but it fell back down to 35km while firing the LV-Ns. Luckily my orbital speed was almost 2400m/s so the plane started rising again. Also lucky the plane is designed for ultra low drag by careful selection of parts so it survived this drop in altitude. It goes transonic pretty easily so I feel confident I can put more oxidiser in it to make a better version.
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9 hours ago, Nefrums said:
That is an inpressive amount of dV.
You should be able to go 1650 in airbreathing mode. I suspect that the canards transfer heat to the cockpit.
O RLY? Thanks, I will test that as I should be able to improve my flight profile if I can take more heat!
5 hours ago, Eidahlil said:Sounds like a great (aka my kind of) challenge.
I have some bad news, and some good news
The bad news is that the dev version of MechJeb (or KER) doesn't think the NERV can get fuel from radially attached tanks (spoiler: it can in 1.2). It's not a major difference in your design, but I'm guessing you do have some LF in those BigS wing strakes.
The good news is that for an SSTO it's easy to calculate manually using Tsiolkovsky rocket equation. Which in the case of NERV is dV = 800 * 9.80665 * ln( mass / ( mass - 0.005 * LF )). So in your spaceplane case (the third screenshot) the dV would be 7056 = 800 * 9.80665 * ln( 82.333 / ( 82.333 - 0.005 * 9768 )).
The good for you and bad for me news is that my SSTO has only 6618
(and is a very clear example of the above problem). I'll be back with another design though. 
Interesting! I just did a quick test and you are correct, it ignores fuel in the strafe wings. I guess 7056 is the new target to beat.
Thanks for doing the maths and next time I will pump fuel out of the side wings to allow Mechjeb to give the correct figure.
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Hmmm, it's been a while since I last played KSP and my first thought was to try and build a really efficient SSTO. I think I did really well with the effort but I want to know who can do more because whatever I do someone else can usually do better!
Rules:
Build an SSTO that has the most Delta V when in Orbit.
1) Can be a space plane SSTO that takes off from the runway or a launch pad SSTO. I will consider them separate categories though.
2) Nothing can blow up or become attached from the SSTO. What goes up must come down in one piece.
3) Must carry a Kerbal in a cockpit. No chairs in service bays.
4) Must reach aprox 100km circular orbit.
5) No Ion engines! They're nice but I want something semi-practical.
6) No part mods except MechJeb, Kerbal Engineer etc.
7) No cheat menu options except part clipping if you really need it.
8) Post a screen shot / video / craft file / whatever as proof.
This is my effort. I hope it can be beaten! Craft file can be provided if anyone wants it.
Spoiler
6584 Delta V remaining. It's an unusual design but that's to get the drag as low as possible. It could go higher if I had some way of cooling the cockpit down as this limits the Rapier speed run to 1500 m/s.
Don't worry if your entry is not the highest. I still want to see designs that are cool looking and/or practical.
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Interesting. Also those spherical probe cores make good bearings as they fit almost exactly inside the hollow structural fuselage.
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Wow, impressive! Another one for the collection
I love the cockpit detail and the lights for windows. You could probably clip in an extra couple of radial intakes somewhere to help mitigate lack of air issues.
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Awesome review! I am most honoured.
I think Kerbal inventory might be causing some of your crashes as I don't have that and everything seems to run fine. You can actually get the Kerbals to hop right into the helicopter through the side and then get them in their seats.
Regarding fuel, yeah I should have found a better way to put more in while keeping the CoM more in line with the centre of the rotors. There are actually another 2 fuel tanks that are filled and clipped quite closely near the tank under the rotors. It's a bit cheaty but I had to sacrifice some things to maintain the aesthetics and the performance. Perhaps a better way would have been to attach two more tanks to the ones under the pilots seats, moved them into each other a bit and then maybe that would have allowed me to fill another two behind the rotors.
Of course if you have a carrier you don't need to worry about range so much.
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I just tested it and it is a great helicopter to fly and looks good! I see what you mean about the descent rate being a bit sensitive but it's pretty much in line with most helicopter designs I have tried in KSP considering it doesn't have many wing surfaces to cause drag. For personal preference I added a strut on the back of the tail for a bit more rigidity, (I should have done that with my Huey
), added a bigger SAS module for more control, (it fits sideways into the hull without being seen), and clipped another rotor blade on to the main one for more power. They weren't essential though.
I do like these designs that use the mk0 fuel tanks. They seem more Kerbal sized to me and they fit nicely on Carriers.
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Ah yeah!
I'm looking forward to trying this one out. I was thinking of making the Little Bird but then I saw all the curvy bits. 
Finding a place to hide the fuel would be tricky too.
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Thanks very much! I might have to look at building a larger version, maybe one that doesn't rely on mk3 parts as it is currently a bit difficult to fit wheeled vehicles inside with the current implementation of wheel blocking ksp has.
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Yay, great stuff. I experimented with paddles as well but couldn't get much more than 2 or 3 m/s. It's like you get more drag underwater but non of the benefits such as extra pushing power or lift.
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13 minutes ago, pTrevTrevs said:
The Cobra has an FLIR ball on it but it doesn't seem to do anything. BD'a radar still sort of confuses me, even after watching the tutorial video on the thread.
Can you actually get the missile to fire? Does it look like the following pic?
In flight you have to have Lock Target selected on the FLIR ball screen, TOW missile selected in the weapons menu, Trigger must be Armed and you have to hold the left mouse button down until it launches, (can be a second or two). It's a good missile and can hit targets about 45 degrees left or right off the front of the craft with static turrets.
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@pTrevTrevs Cool! Have you tried using the Targeting ball or pod with the TOW's yet?
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15 hours ago, pTrevTrevs said:
Here's a little taste of some Military-Issue .50 Caliber Freedom (Model 1776) for you all, inspired by @Redshift OTF's Huey (the inspiration it has caused isn't likely to wear off anytime soon).
Happy Independence Day, or... Treason Day, as I hear it's called in Britain.
USA! USA! USA!
Oh yeah. Wow! Please finish this when you have time. It would go well with my Huey and Carrier. Forgive my ignorance but is this the AH-1 Cobra?
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I almost missed this thread! Thank you for featuring two of my craft. I just hope they are something fun for people to play with.
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I tested it and it seems rock solid and smooth at high speeds! It was a bit wobbly but adding some wheels in the right place corrected that. I'm not sure how it handles high stress low speed situations yet but I will test that at a later date. It's a good design.
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2 hours ago, Majorjim said:
SAS powered hinges are very well know round these here parts matey. Although the method shown by Nuketurkey is new unless I am mistaken.
I was thinking more of the bearing design he used. It seems pretty good considering it doesn't use any wheels although I am not sure if it can handle the speeds and forces of a jet wash design. Using round probe cores for that sort of thing is not something I have tried.
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7 hours ago, nuclear_turkey said:
like this - https://www.youtube.com/watch?v=goEH48u4bkk
That's an interesting way of doing things. Perhaps it might be of interest to Azimech and his stock propeller thread. Have you tried using engine wash to spin it instead of SAS power? I'm not saying it would work better but it might be interesting.
(and is a very clear example of the above problem). I'll be back with another design though. 
), added a bigger SAS module for more control, (it fits sideways into the hull without being seen), and clipped another rotor blade on to the main one for more power. They weren't essential though.
Finding a place to hide the fuel would be tricky too.
Most Delta V SSTO (no Ions)
in KSP1 Challenges & Mission ideas
Posted
Haha, thanks! Getting an SSTO to Eeloo or, heaven forbid, Moho is quite an achievement to be fair. Having perfected my design I have an SSTO that has 7243 Delta V but also a TWR of 0.20 in Kerbin orbit so would actually be useful for landing on Eeloo. So they have their uses. Although the challenge is just just have the most Delta V in orbit which is possible with having a very low TWR of LV-Ns and a load of Rapiers.