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Anniversary was in April, why wait till now?

Virtually all of the combat U-boats, both type IX and VII, had their deck guns removed circa 1943 (even the older-built ones) and their towers were rebuilt to take more 20 and 37 mm Flak guns. The advent of radar made day or night surface attack almost suicide, besides, by then the Allies had a...

You can see flames around the bottom of the vehicle but above the nozzle (where there probably shouldn't be) from the ignition time on.

I just go the ballonets implemented in Excel. Complexity goes way up here. First complete the inflation worksheet. You tell it what gauge pressure to inflate to and the percentage of the envelope taken up by ballonets. It outputs the mass of loaded lifting gas, which needs to stay constant...

Note quite, temperatures not constant.

So, I've been working on adding a ballonet implementation to my workbook. Spoiler alert: if you have neutral buoyancy at one altitude, you basically have neutral buoyancy at all altitudes (within a range). It's a consequence of the fact that maintaining constant relative pressure is very close...

Well, bugs are guaranteed on restarts, after all.

I don't have time this week to look at this but I'll try more next week.

That's the weird thing, If you run the numbers in my workbook for Airlander 10, 38000 cubic meters of Helium at 20000 kg solid mass is not heavier than air, not even close. :blink:

Hello Mark, Are you able to use Excel? Ignoring ballonets for now, I've worked out the math(s) for an airship. This version assumes a constant envelope volume with the lifting gas at atmospheric surface pressure and temperature regardless of the gauge pressure (think non-rigid airship-or a gas...

In fairness, a lot of humans would have rear-ended that car, too.

Shipedit.exe is saying around 60,200 m^3 for the entire mesh, but admittedly I don't know how to use the program well.

I'm going to have to take some time later to go through this (i.e. let's talk now but do not change the code yet), but this stands out immediately: Let's ignore the ballonets for a bit. For a non-rigid airship, my first approximation would be to treat the envelope volume as constant. What...

If it's for scenery, all you should need is the mesh.

Yeah, we need to have a discussion about airship physics. I'll say now that I greatly prefer the CEILING system to the GAS system. It's helpful to the pilot to know the neutral buoyancy altitude, and to be able to set it. Perhaps that's how to implement ballonets. What is the current model...

Big improvement. I miss the ability to vary the neutral buoyancy altitude directly in the simulation. Perhaps the pilot could increase or decrease the payload and/or starting ballast mass when landed and get a prediction of the buoyancy altitude? Edit: It could be that the ceiling is being...

Well, that, but I meant more that Orbital-ATK became Northrup Grumman a few days ago. We are yet to see the new decal.

Stargazer is going to need new decals. :hmm:

Airship Engineering (101)