StevenLawyer

This issue just about docking on load up. With my space plane, it returns from a mission, docks with the mothership, and then robotics attach the new modules. Of course, once the plane docks with the mothership, it is all one vessel from KSP's perspective. Then the robotics rotate the new modules in place and the docking ports take hold. Then the connection to the robotics is jettisoned using couplings. Lastly, the spaceplane undocks. What I have found is that I have to go to each docking port on the spaceplane after it undocks and make it the primary docking node (thanks for that tip!). Once I do so, fuel flow works again. It seems that the docking ports leading into the vessel containing the "control from here" point need to be primary for things to work.

New02Day--Thanks for the response. Yes, they're not identical. The orange rocket has the docking ports connected as nodes, whereas the white rocket they are docked. But once docked, they should function identically. I'll try the primary docking node on my spaceplane and report back. Hotel26--Fuel priorities on the tanks in the sample rockets are the same level. But, with my spaceplane, even when the docked tanks have a larger priority number (and therefore should drain first), they don't. In fact, they never draw--the engines flame out for lack of fuel with the docked tanks full.

Hello, all. I've spent weeks building a beautiful reusable space plane capable of sea level landings on Eve and Laythe and descent to 0 meters (sea level) on Jool. After a flight, the spaceplane is refitted with jettisonable fuel tanks and jet engines/electric fan blade motors depending upon the planetary body. The refitting is done using clamp-o-tron docking ports--one on the spaceplane and one on the fuel tank or engine to be attached. I've meticulously built a mothership with robotics to fit the parts on the spaceplane. Now I am finding that, even though crossfeed is enabled on both docking ports, the engines won't draw fuel from tanks across the docking ports. At first I thought I had done something wrong, but I have built two very simple and seemingly identical ships that demonstrate the problem. Take a look at the pictures in the links below: The ships are identical (other than the paint scheme), right? Notice that they both have an upper and lower fuel tank connected by docking ports. You can see that on each ship both of the docking ports have crossfeed enabled. And yet, while the orange ship performs as you would expect (fuel drawing evenly from both tanks), the white ship will only draw fuel from the bottom tank. What's the difference? The yellow ship was built with the docking ports connected in the VAB--normal top to bottom construction. The white ship was built with the top and bottom docking ports not connected in the VAB, but rather placed immediately adjacent to each other so that they would dock as soon as the ship loaded on the pad. Once on the pad, the ships are identical in apparent construction, and yet no fuel will flow across the docking ports that are docked after launch. Without that capability, the only option for using drop tanks attached in flight is to do manual transfers--which aren't always a viable option if fuel draw is happening quickly, such as in a return to orbit. https://drive.google.com/file/d/1iAdn7XVQgtV1Dy15jj2Ub4PekmsNjCxS/view?usp=sharing https://drive.google.com/file/d/1CYP1SKITTRaJCUTRWQUBkrnz8nYc3IUH/view?usp=sharing HEY KSP GUYS--I know you're very busy with KSP 2, but what about a little love for us long time KSP users (I go way back) who want to keep playing while we wait for KSP 2? If anyone wants to see this problem for themselves, the two ships in these pictures can be downloaded here: https://drive.google.com/file/d/1Fp7Juix5nLlfCrv_GrNRKPMHFCJKx71_/view?usp=sharing https://drive.google.com/file/d/11M-pqvgITFbKp--IQeZPdD5CfEmMMZSS/view?usp=sharing

I've created an Excel spreadsheet that will calculate even spacing for satellites. You can find it here: Satellite Spacing Calculator

I've created an Excel Workbook that will calculate this: You can find it here: Satellite Spacing Calculator

I created an easy to use free Excel spreadsheet for calculating even Satellite spacing. Enjoy! Satellite Spacing Calculator

I created a free easy to use Excel spreadsheet for figuring out evenly spaced satellites. Enjoy! Satellite Spacing Calculator

I've put together a free Excel spreadsheet that will make calculating release points and orbits for evenly spaced satellites a breeze. Enjoy! Satellite Spacing Calculator

Thanks everyone for the responses. I didn't realize they had made Eve's atmosphere thinner. Has the wiki on the planets been updated with the new information?

So, a little further examination, I think I have partially answered my own question. Looking in the VAB, it appears that fuel burn rate remains constant and that it is only thrust that changes in a linear relationship to ISP. The problem is that this will mean getting up from Eve will be much, much harder!

Prior to 1.0, engine thrust remained constant . . . only ISP decreased in atmosphere. It's apparent now that thrust is also decreased in atmosphere. Can anyone spell out the formulas in play? Do both thrust and ISP decrease, meaning less thrust for more fuel? Or does fuel consumption decrease along with thrust?

I read somewhere that the Devs had revised the modeling of thrust to no longer be constant--i.e., to decrease thrust with decreased ISP due to atmosphere, but I think they have made a sea-level Eve ascent virtually impossible.

So, I build a ship that should have a takeoff TWR from Eve of about 2.0 (about 4.0 on Kerbin). I get it to Eve, and at takeoff, it has under a 1.0--can't get off the ground. Tried it with multiple designs. Is this a bug? Any thoughts?

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Great work! Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander), including Tylo with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander) with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander) with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander) with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.

Here's my single launch, no refuel, stock grand tour ship that includes a reusable lander for all planets except Eve (Eve is a separate one time use lander) with reusable rover and reusable probes (you're not going to land on a planet without first sending an unmanned probe, are you?). I finished the mission with fuel to spare.