Module 2 of our proprietary Flight Systems Software package is almost ready for it's initial release.

What the program displays while on the ground(Droo).

The calculator is relatively simple. First, some general assumptions are made:

  • Drag is negligible and therefore ignored

  • Both starting and ending orbits are considered "circular"

  • Hohmann Transfer will be completed using only 2 impulsive burns(one to enter the transfer orbit and one to enter the final orbit)

Then, using the equation v=sqrtµ(2/r-1/a) as a starting point, it calculates the necessary velocities for each leg of the transfer and uses that to determine necessary ?v for each burn as well as the total ?v for the maneuver.


©1/2022 KOZMOsoft™

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    1,159 YaMomzBox420

    For clarity: ?v is ∆v. For some reason it gets changed to ?v in the post itself, but stays ∆v in the comments 🤷🤦

    Pinned 2.3 years ago
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    13.7k Vedhaspace

    @YaMomzBox420 cool

    2.3 years ago
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    1,159 YaMomzBox420

    @Vedhaspace ∆v1 is the "transfer orbit injection burn" that puts the craft into the transfer orbit. ∆v2 is the "orbital insertion burn" that places the craft into the target orbit. The 3rd one is the total of the first two.

    2.3 years ago
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    13.7k Vedhaspace

    @YaMomzBox420 yeah

    2.3 years ago
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    1,159 YaMomzBox420

    @Vedhaspace yeah, I've noticed it varies from 3500 to 4500 depending on the design of the craft(from Droo), so I'm assuming the program is accurate if Droo had no atmosphere

    2.3 years ago
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    13.7k Vedhaspace

    But we need the most accurate burns to actually go there

    2.3 years ago
  • Profile image
    13.7k Vedhaspace

    @YaMomzBox420 yeah

    2.3 years ago
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    13.7k Vedhaspace

    So why are there 3∆v?

    2.3 years ago
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    1,159 YaMomzBox420

    @Vedhaspace If you're already in orbit or launching from a planet/moon with no atmosphere then it should be accurate though

    2.3 years ago
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    13.7k Vedhaspace

    @YaMomzBox420 we need nearly 3700 m/sec ∆v for orbit sometimes 3500m/sec ∆v is enough they depends on the drag

    2.3 years ago
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    1,159 YaMomzBox420

    @Vedhaspace Not yet, but I'm already looking into implementing that. If you notice in the screenshot it says ~3500 m/s ∆v to reach 100km orbit from the ground, but when I launch the rocket it only drops to ~1200 before it runs out of fuel in a suborbital trajectory. I can account for drag by adding some calculations to the code, but it's complex and relies on information about the crafts shape and size that isn't easy to find using vizzy

    2.3 years ago
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    13.7k Vedhaspace

    Cool!
    Does it calculate drag ∆v loses?

    2.3 years ago
  • Profile image
    3,494 vghfr

    @YaMomzBox420 lol weird

    2.3 years ago
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    1,159 YaMomzBox420

    @Staticalliam7 When I go to edit the post it shows ∆v in the text box, but when I submit and look here it shows ?v 🤦🤦🤦🤦🤦

    2.3 years ago
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    1,159 YaMomzBox420

    2.3 years ago
  • Profile image
    1,159 YaMomzBox420

    @Staticalliam7 lol idk why it keeps doing that to me...🤦 I actually used that symbol and it still fucked it all up

    2.3 years ago
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    3,494 vghfr

    btw here's the delta symbol: Δ

    +1 2.3 years ago

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