Multistage DeltaV Calculator

An app for calculating the delta-v of a multistage rocket. Useful for space sims

Note: I lost the signing keys to this app after a hard drive failure about a year ago! I cannot continue development of it. I have a new version uploaded to the play store under a different listing: "Multi Stage Deltav Calculator 2"

Have you ever wanted to see how the total delta-v of a rocket changes when you add an additional stage?

This app allows you to calculate the total delta-v of a multistage rocket. Instead of just applying the rocket formula to one stage, this app display's the delta-v for each individual stage and also the total delta-v of the rocket down to that stage.

You can save and load rockets or individual stages. You can insert a new stage at the beginning, at the end, or in-between stages.

This can be very useful in space simulators. This is not only useful for designing the rocket. This can also be vital when planning a new maneuver in order to see if you have enough delta-v left in your rocket.

The saved rockets and stages are stored in the /data/data/com.evandisoft.multistagedeltav.app/files folder on the device. There is also an auto-save feature. The auto-save file is stored in the same folder and its name is "autosave.json".

(Note: I'm not sure whether this folder can be accessed easily on new devices)

How to use:

To use this effectively, you have to separate each stage and calculate that particular stage's full mass (mass when full of fuel), dry mass (mass when missing fuel), and ISP (which is easiest to do with one type of engine per stage). The fuel you remove to find dry mass is only the fuel that will be spent in that stage. Make sure when you calculate the full mass and dry mass of a particular stage you do not have any other stage attached.

Disclaimer: I'm not liable for any damages resulting from any possible inaccuracies of my app or failure to calculate perfectly or at all correctly. I think it works, I've used it a lot, and I like it a lot. But I'm not willing to bet my life on it! Don't depend on this app if you are designing or using real rockets!