downloaderfan
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Alright folks, here's my first challenge.
Backstory - This scenario takes place in an alternate earth from a parallel universe, where the industrial revolution & the space race began 100 years before earth from this universe. That's right, in that earth, the first human satellite was launched in the year 1857, humans landed on the moon in 1869, landed on mars in 1930 and by the year 2010, humans have completely colonized the moon,mars, certain moons of gas giants like Europa & Titan & sent satellites to most of the asteroids that were discovered at the time. But for some reason or the other, there has never been a close fly-by of the Kuiper belt object Varuna.
Now a newly founded private space agency wants to make a name for itself by sending the first satellite to space which would perform a fly-by of Varuna. However, due to a surge of newly founded private space agencies, nothing goes without competition.
The scenario(attached below) starts with the delta glider in LEO, with low inclination with respect to the ecliptic plane and the date being 5/5/2010. Your task will be to use the limited amount of fuel that the DG has and perform a close fly-by of Varuna with an altitude of 100 km. But due to competition, you can't wait beyond 10 years to launch the DG, meaning you'll have to perform the ejection burn before 5/5/2020. Also, once you begin your ejection burn, you note down the exact time. As soon as you begin your ejection burn, you have exactly 22 years to intercept varuna, not a second more than that.
So to summarize:
Perform the earth ejection burn anytime between 5/5/2010 & 5/5/2020.
Once you begin your ejection burn, you'll have to intercept Varuna before 22 years have passed.
You can use the scenario editor to move quickly to the date of your ejection burn.
Do not use the scenario editor to add/subtract fuel. (of course)
Things you can do to make this challenge simpler:
You can uncheck Nonspherical gravity sources, Radiation Pressure & Gravity-gradiant torque in the Parameters tab of Orbiter. Having these enabled leads to inclination changes with respect to the ecliptic in LEO, which just might be enough to cost you this challenge.
22 years of simulation time = 116 minutes in real time at 100000x. I get it, that's too much for most people, so again you can use the scenario editor to move to the future (you can't move backwards in time)when your coasting through space for long periods. It is kind of cheating since you'll be avoiding corrections to your trajectory which you would have otherwise performed if not using the scenario editor, but at least, by this point, you would have planned a trajectory that satisfies the above criteria, which is in itself, a big deal. I have provided sufficient fuel for corrections even if you don't use the scenario editor while coasting though space, but you'll have to use the IMFD map program to it's fullest.
You know your limitations better than anyone else, choose wisely. :hello:
How to post the results:
After you've reached Varuna, post an image of the DG near Varuna. Like the image below.
No dates or any other solution revealing information on the screenshot.
Right after you've completed your initial earth ejection burn, note down the total dv available (main engine dv + rcs). Write about that here.
After reaching Varuna, note down the total dv available & again post that here. (Also say if you have actually used the scenario editor after the earth ejection burn while coasting though space to quickly move ahead in your trajectory)
Good luck fellow orbinauts :thumbup:, this ain't an incredibly complex/tough challenge in my opinion so try this one out. You just might succeed.
And lastly, you'll need the Varuna addon for this challenge. [ame="http://www.orbithangar.com/searchid.php?ID=4346"]Varuna[/ame]
Depending on the response, I'll post the solution sooner or later.
Backstory - This scenario takes place in an alternate earth from a parallel universe, where the industrial revolution & the space race began 100 years before earth from this universe. That's right, in that earth, the first human satellite was launched in the year 1857, humans landed on the moon in 1869, landed on mars in 1930 and by the year 2010, humans have completely colonized the moon,mars, certain moons of gas giants like Europa & Titan & sent satellites to most of the asteroids that were discovered at the time. But for some reason or the other, there has never been a close fly-by of the Kuiper belt object Varuna.
Now a newly founded private space agency wants to make a name for itself by sending the first satellite to space which would perform a fly-by of Varuna. However, due to a surge of newly founded private space agencies, nothing goes without competition.
The scenario(attached below) starts with the delta glider in LEO, with low inclination with respect to the ecliptic plane and the date being 5/5/2010. Your task will be to use the limited amount of fuel that the DG has and perform a close fly-by of Varuna with an altitude of 100 km. But due to competition, you can't wait beyond 10 years to launch the DG, meaning you'll have to perform the ejection burn before 5/5/2020. Also, once you begin your ejection burn, you note down the exact time. As soon as you begin your ejection burn, you have exactly 22 years to intercept varuna, not a second more than that.
So to summarize:
Perform the earth ejection burn anytime between 5/5/2010 & 5/5/2020.
Once you begin your ejection burn, you'll have to intercept Varuna before 22 years have passed.
You can use the scenario editor to move quickly to the date of your ejection burn.
Do not use the scenario editor to add/subtract fuel. (of course)
Things you can do to make this challenge simpler:
You can uncheck Nonspherical gravity sources, Radiation Pressure & Gravity-gradiant torque in the Parameters tab of Orbiter. Having these enabled leads to inclination changes with respect to the ecliptic in LEO, which just might be enough to cost you this challenge.
22 years of simulation time = 116 minutes in real time at 100000x. I get it, that's too much for most people, so again you can use the scenario editor to move to the future (you can't move backwards in time)when your coasting through space for long periods. It is kind of cheating since you'll be avoiding corrections to your trajectory which you would have otherwise performed if not using the scenario editor, but at least, by this point, you would have planned a trajectory that satisfies the above criteria, which is in itself, a big deal. I have provided sufficient fuel for corrections even if you don't use the scenario editor while coasting though space, but you'll have to use the IMFD map program to it's fullest.
You know your limitations better than anyone else, choose wisely. :hello:
How to post the results:
After you've reached Varuna, post an image of the DG near Varuna. Like the image below.
No dates or any other solution revealing information on the screenshot.
Right after you've completed your initial earth ejection burn, note down the total dv available (main engine dv + rcs). Write about that here.
After reaching Varuna, note down the total dv available & again post that here. (Also say if you have actually used the scenario editor after the earth ejection burn while coasting though space to quickly move ahead in your trajectory)
Good luck fellow orbinauts :thumbup:, this ain't an incredibly complex/tough challenge in my opinion so try this one out. You just might succeed.
And lastly, you'll need the Varuna addon for this challenge. [ame="http://www.orbithangar.com/searchid.php?ID=4346"]Varuna[/ame]
Depending on the response, I'll post the solution sooner or later.
Last edited:
:thumbup:
