Venus tour with all parts Recovered.

[SFSAbhishek]

No one did this earlier so..,

I am getting quite good in reusable missions.
And as always, Blueprints given.

 

[SFSAbhishek]

How is it?

 

[James Brown]

Awesome

 

[kianKH]

very good

 

[TtTOtW]

Well... 1.4 wasn't this kind. Very well done. A real first.

 

[SFSAbhishek]

Awesome

very good

Well... 1.4 wasn't this kind. Very well done. A real first.

Thank you

 

[Mars Pathfinder]

No one did this earlier so.., View attachment 53015
View attachment 53016 View attachment 53017 View attachment 53018 View attachment 53019 View attachment 53020 View attachment 53021 View attachment 53022 View attachment 53023 View attachment 53024 View attachment 53025 View attachment 53026 View attachment 53027
I am getting quite good in reusable missions.
And as always, Blueprints given.

Nice!

 

[James Brown]

Look like I can use imagination to build things

 

[James Brown]

I don't always want to use maths in here

 

[SFSAbhishek]

I don't always want to use maths in here

It depends on what is your build. If it's a mission you will have to look at its maths, but if it's a concept or fiction craft it's not even necessary for it to be able to make it toLEO.

 

[James Brown]

Ahh god I am not good at the math of rockets

 

[James Brown]

Is there a list of formula of rocket science?

 

[TtTOtW]

Is there a list of formula of rocket science?

There are tons.

But most of us just use the delta V equation and TWR (we don't always trust the readout. We combine if with the delta v map to plan our missions if we feel like getting technical. Otherwise we just build and fly, simple.

 

[James Brown]

There are tons.

But most of us just use the delta V equation and TWR (we don't always trust the readout. We combine if with the delta v map to plan our missions if we feel like getting technical. Otherwise we just build and fly, simple.

So is there a list of useful and important ones? I've never used them for any mission

 

[TtTOtW]

Delta v: Δv=g×ISP×ln(mf/me)

g》9.8 (Earth gravity)
ISP》the ISP of the engines that burn on that stage
mf》the mass of the rocket when full (or that stage + everything it carries)
me》the total mass when that stage rsn out of fuel.

TWR=m/thrust

Thrust》 the total of that stage's engines.

Δv map:

By Altaïr.

 

[James Brown]

What is mf and me?

 

[Mars Pathfinder]

What is mf and me?

Mass full - mf
Mass empty - me

 

[James Brown]

Mass full - mf
Mass empty - me

So it is depends on the amount of fuel?

 

[TtTOtW]

Yes

 

[James Brown]

Delta-V…… look like it is like acceleration of a rocket but more complicated, it include log with Euler's e as a base

 

[SFSAbhishek]

Delta-V…… look like it is like acceleration of a rocket but more complicated, it include log with Euler's e as a base

Actually Delta-V is change in velocity. If you look at the dimensions,
G: LT^-2, ISP: T and ln(mf/me): is dimensionless so the dimensions of the end result is LT^-1 which is velocity.

 

[James Brown]

Oh, I understand it now, I think I should investigate it and do thought experiments about it

 

[James Brown]

Last question, it is a Vector isn't it?

 

[TtTOtW]

Delta (symbol Δ) means difference. It is always positive, as it is always the greater number minus the lesser number. So the delta of 5 and 3 is 2. Never -2. v is velocity. Velocity is a vector. So yes it is a vector. Δv is the difference in velocity that your rocket or stage can achieve if there is no gravity. Gravity detracts from the potential of the rocket, as does drag. So the rocket spends its Δv fighting the atmosphere and gravity first, and only accelerates after that has been overcome, until orbital velocity is reached. Whatever remains, can be used for missions. Dropping empty stages and boosters reduces me in the equation, thus increasing Δv. That is why staging is so important. Refuelling in orbit increases mf, which also increases Δv.

 

[bobbblair123]

Delta (symbol Δ) means difference. It is always positive, as it is always the greater number minus the lesser number. So the delta of 5 and 3 is 2. Never -2. v is velocity. Velocity is a vector. So yes it is a vector. Δv is the difference in velocity that your rocket or stage can achieve if there is no gravity. Gravity detracts from the potential of the rocket, as does drag. So the rocket spends its Δv fighting the atmosphere and gravity first, and only accelerates after that has been overcome, until orbital velocity is reached. Whatever remains, can be used for missions. Dropping empty stages and boosters reduces me in the equation, thus increasing Δv. That is why staging is so important. Refuelling in orbit increases mf, which also increases Δv.

I'm getting so close to actually being able to use this. If I can get engine ISP. Trial and error is so tedious.