Estimating Rocket Size using the Rocket Equations

This video provides an introduction to the "Rocket Equations" which are used to estimate the size of an orbital rocket. Concepts such as launch velocity, Delta-V losses, mass fraction, and structural ratio are discussed. An example problem is worked to show how the equations are used and the results are compared to an actual rocket. This video is intended for high school teachers and students and early engineering students. More information on this topic can be found at www.labratscientific.com.

[@kylemeeuwsen8089]

Thank you so much for this video. Very cool to see this run through.

[@junseng06]

Interesting! Could you teach us about gravity assist? Much thanks!

[@junseng06]

Other youtube channels literally threw a whole equation pie at us without explaining

[@itisscientific3165]

You make rocket science sound easy thanks for the videos

[@Muzzy_Vlogger]

its been 4 years since your last upload sir,! why did you just stopped uploading,not only here but on your website tooo!we'll be waiting for your uploads.............

[@carlosalbertovelascoquirog9957]

Excelente ..

[@lokeshkumarkm]

Teaching was fantastic! I have been searching for a few months about how to calculate the height traveled by a rocket and which formula we have to use. So could you please teach us about height calculations?.

[@jensaldarriaga1515]

Which book did you use to extract those equations?

[@labratscientific1127]

I can't specify a specific book, but I'm sure most basic rocket design texts will have them. I got the equations from my rocket design professor many, many years ago (yep, I kept my class notes) - he was an old rocket guy and we didn't use a text book... An internet search may reveal a textbook.

[@JoeJalopy]

Fundamentals of Astrodynamics is a source.

[@leonidkhamadakov7778]

Plz use metric system. We don't know imperial system well

[@labratscientific1127]

I grew up in the US school system so I'm English unit centric. I actually prefer metric, so I'll try to use that in the future...

[@leonidkhamadakov7778]

@@labratscientific1127 thank you for your reply. And it's not much of a problem still. I love watching your videos and learning about rockets, then implementing these techniques and knowledge in my favorite game simplerockets 2. Just keep up the good work. You're one of the gem channels about which only few lucky ones know about

[@RAVISHANKAR-rt4ql]

Payload mass was 621.5 kg

[@major_kukri2430]

Your videos are really good but please consider using metric units.

[@labratscientific1127]

Yep, I plan to lean more towards metric in the future...

[@major_kukri2430]

@@labratscientific1127 Thanks

[@RAVISHANKAR-rt4ql]

I am getting a negative value for the stage weight when using 0.49 as the propellant fraction and 0.545 as the structural ratio. The computation for stage weight comes to - 7944.85 kg. Whether the negative sign is ok.

[@labratscientific1127]

Negative values indicate a configuration that is not feasible...

[@RAVISHANKAR-rt4ql]

@@labratscientific1127 Yea I understood that, but in the beginning assuming structural ratio, that is actually structural fraction.

[@maxivy]

Sir why did you stop uploading these videos. I guarantee you will be successful on RUclips if you cracked the algorithm a bit better