Search results

ok good to know there's a method in the madness! :)

I think I understand the equations and worksheets now, thanks. I am now thinking how best to operate the airship. So I understand that if for some reason ballast is dropped, e.g. cargo is released, from the airship then it would rise, obviously. What I'm not clear on is would the airship...

Thanks boogabooga I do have had quite a few questions but I manage to answer them after typing a few key words into the internet ... there seems to be a lot to learn though so still plodding along. You do seem pretty proficient with excel and physics! :thumbup: I'm a bit puzzled on how you...

I think I'll have a new version to upload in a few days. I have been busy with these things which all took some time to do: 1. Organising and commenting the code to make it easy to read 2. Playing around with boogabooga's worksheet and learning about ballonets 3. Implementing boogabooga's work...

New version of the airship is working. The volume now remains constant and the ceiling can be increased of decreased before takeoff by varying the weight of the ballast. I'll make sure the code is readable then upload the the new version.

That had me scratching my head a bit earlier this evening but now I've got it! :tiphat:

Been playing around with boogabooga's excellent spreadsheet that calculates the lift capability of a non-rigid airship. To fly on Mars I think the airship envelope would most likely have to be at least 3 times its current length or about 30 times the volume of Airlander 10 to fly on Mars. I...

boogabooga if you could add a function or routine into the code to calculate the ceiling that can be queried from the main program. That would be fairly easy to implement I think. Are you planning to factor in the engine thrust and aerodynamic lift into the calculation of a 'ceiling' as...

Thanks for the calculations, that's great. I had a look. That would make things more convenient. I guess the pilot could query an onboard 'flight computer', consisting of your calculations, to determine how much ballast to add or what payload weight could be carried. The calculations could also...

That volume might be for a box that encompasses the mesh. I am thinking that the airship's envelope mesh volume could be scaled to the required volume calculated from information given in the scenario file. Controlling the neutral buoyancy altitude by the pilot would be made perhaps by adding...

The length of the airship is close to that of Airlander 10 which has a envelope volume of 38000 m3.

Yes that could work. ok ... Buoyant lift: Firstly the atmospheric density is obtained from the desired ceiling altitude (neutral buoyancy altitude) set in the scenario file or via the HUD. The volume of the airship's envelope is then calculated as follows...

The current ceiling value can be viewed by pressing c after pressing 1. Thanks I'll look into it GAS 90 is to make the airship is heavier than air so it can fly as a hybrid airship. The other 10 percent is taken up by some imaginary air filled ballonets. This then makes the use of a neutral...

Uploaded version 5 to post #1 In the next version I hope to add a simple representation of the ballonets. For trimming the pitch this is already implemented via the ability to move the centre of mass in the model. I just need to revise the messages and perhaps limit the range of pitching. I...

I am thinking of it as a non-rigid airship. Well for Mars I am assuming the engines are ducted fans like on Earth but spinning at ten times the speed like for the NASA Mars helicopter. I haven't looked into it in any depth though...

That can easily be reactivated. I have overhauled the code for animating the fan to prevent it wobbling when the whole engine is rotated quickly. It may not have been that noticeable because I had previously limited the rate of the rotation of the thrust vector. I had thought the wobbly...

Added some dust

Thanks for the link and spotting my silly mistake in the code. Lockheed Martin seem quite serious about hybrid airships. Looks like it could become a real thing in the future. I'll have to mention them in the documentation.

ok such a simple change for the messages! I thought I had muddled up the thrust directions in the HUD messages in the last version. In any case I have followed your recommendations regarding the messages in post #17 as that seemed like a good way to do it. I have a new version and will...

Uploaded version 3. The main problem I have had, and is persisting to some extent, is wobbly rotor animation. Hope to fix that in subsequent iterations of the addon. Bug 1 in post #13 is fixed I think. There is now an option to decrease the amount of lifting gas in increments of 10 percent...