Perfect Suicide Burn

[Emir]

Hello i will dont have an phone to play SFS for like 1-2 days
so i want to calculate perfect suicide burn with my NE LHS Dragon with %15 Fuel left
any way to calculate that?
or can somoene try ingame?

 

[Marmilo]

Hello i will dont have an phone to play SFS for like 1-2 days
so i want to calculate perfect suicide burn with my NE LHS Dragon with %15 Fuel left
any way to calculate that?
or can somoene try ingame?

First of all, with 15% you don't need a suicide burn. Makes sense to do it if you don't have enough fuel for a "bouncy" landing.

 

[Mars Pathfinder]

Idk what i'm gonna call to the propulsive landin of mine whether is it a hover slam, Blu origin (phallus rocket) hover slam, lunar module style ahhh idk.... as it touch down i'm ok (just don't tipped over)

 

[Horus Lupercal]

There is no way of calculating the optimum time to start a suicide burn. A few of us have tried and there are waaaaaaaaay too many variables to take into account.

Every landing is different, so even if we did practice, that won't help you. You need to do the practicing yourself to get a feel for how your rocket reacts, when you need to stamp in the accelerator, when you need to throttle back. Do what SpaceX did and do the landings, crash the rockets until you get it right.

 

[Pink]

Yes, the maths for suicide burns is influenced by many variables, and those variables don't even stay the same due to our less-than-precise piloting.

What I think SpaceX does is a kind of feedback loop where the rocket calculates things just in time according for the current speed, distance, etc, sees what the result is, and adjusts accordingly.

What YOU need is to get a feel for the rocket like Horus said, and use the biological computer between your ears to sub-consciously account for the 'squishy' or 'soft' variables on the fly.

 

[Emir]

well its possible
it just needs these
The variables :
Fuel Left
max Thrust
Fuel kg being used every second (its getting lighter, that's why it needs this variable)
Weight of the Rocket
altitude
Velocity
Perfect "Pilot"

 

[Horus Lupercal]

well its possible
it just needs these
The variables :
Fuel Left
max Thrust
Fuel kg being used every second (its getting lighter, that's why it needs this variable)
Weight of the Rocket
altitude
Velocity
Perfect "Pilot"

Well, if it's that easy, have you calculated it?

Cos I can see a few things missing from that list.

 

[Marmilo]

well its possible
it just needs these
The variables :
Fuel Left
max Thrust
Fuel kg being used every second (its getting lighter, that's why it needs this variable)
Weight of the Rocket
altitude
Velocity
Perfect "Pilot"

You're missing drag.

 

[Emir]

Well, if it's that easy, have you calculated it?

Cos I can see a few things missing from that list.

too lazy
you can finish the list and do it yourself lol

 

[Horus Lupercal]

too lazy
you can finish the list and do it yourself lol

Well there's that go-getter attitude we expect here.

And I have.

Hot landings are kind of a speciality.

 

[Pink]

too lazy
you can finish the list and do it yourself lol

Weren't you the one who asked how to do it?

 

[Horus Lupercal]

Weren't you the one who asked how to do it?

Nah, he wanted someone to do it for him

 

[The epic chicken]

Well there's that go-getter attitude we expect here.

And I have.

View attachment 59967

Hot landings are kind of a speciality.

nice landing

 

[Altaïr]

too lazy
you can finish the list and do it yourself lol

I'm thinking, if you make a few hypothesis like neglecting drag and the mass variation (which is reasonable for the later as the burn is expected to be short), this is a simple problem of newtonian mechanics...

The solution would be approximative, but would be a good basis for a first try. Then some trial and error would allow to adjust the result.

I could do it very easily, but... I'm too lazy for that.

 

[The epic chicken]

too lazy
you can finish the list and do it yourself lol

hey
do you know heilcoptors are perfect to practice sucide burns
<iframe src="FlightGear 2021-04-07 12-39-38.mp4 from The epic egull on Vimeo" width="640" height="334" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen title="FlightGear 2021-04-07 12-39-38.mp4"></iframe>

 

[The epic chicken]

 

[Blazer Ayanami]

hey
do you know heilcoptors are perfect to practice sucide burns
<iframe src="FlightGear 2021-04-07 12-39-38.mp4 from The epic egull on Vimeo" width="640" height="334" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen title="FlightGear 2021-04-07 12-39-38.mp4"></iframe>

Helicopters DONT do suicide burns. SFS helicopters maybe, but that’s nowhere near a realistic helicopter.

 

[The epic chicken]

Helicopters DONT do suicide burns. SFS helicopters maybe, but that’s nowhere near a realistic helicopter.

i was just kidding