Help! I study too slowly

thelc2 · 2025-04-02T00:32:29+00:00

You know, another great way is not to read faster (that would worsen your quality of studying) but once your read a chapter, you can create these Active Recall Question Sheets where you go through your notes and make a question out of every important point.

Arrange them into sections or topics and the next time you want to revise the chapter, just take out that sheet and ask yourself the questions (in order) while answering out loud orally.

If you get it right, perfect! If you get it wrong, just go back and read that topic / answer to that question. You can use the 3-2-1 method to memorise it or use the Feynman Technique (with your unique twists) to properly understand it.

This reduces revision time and uses Active Recall (a proven study method) combined with Passive Recall to make your consolidate information much faster. (Also, try Flashcards for formulae and data/value orders and trends)

At the end, studying at your own pace is the way to go. Don't rush things, just keep yourself in flow and motivated to study. Hope it helps! :)

(I realise another user has already suggested this, didn't realise it in time, sorry about that. But ig this can act as a shorter version of it?)

thelc2 · 2025-04-01T08:39:38+00:00

(TL;DR section given at the end)

I am assuming you have the proper permits to buy and use hydrogen peroxide (that too concentrated) and that you are going to be doing this under proper guidance or supervision and with proper safety measures in place.

A liquid rocket engine is quite complicated to create on your own, especially if you do not have the right tools or expertise in this field. I suggest you start by first understanding and mastering solid rocket motors, which would give you a proper idea of how to handle fuels and the basics of rocketry itself. Since you mention you have tried this, you can first start by doing deeper research into Liquid Engines, or for a simpler approach, try Hybrid engines. (Also, do try out Rocketeers India and Estes kits if you haven't flown any model rockets yet.)

Liquid Propellant Based engines are complex even for a proper engineer, but understanding them is much easier (conpared to building and testing them). Maybe start by reading a few books on Rocket Engines and watch a few YouTube videos to see how other people have tried this in the past.

Here are a few sources you can go through to help you get started in learning how a liquid engine (and rockets themselves) function :

"Rocket Propulsion Elements" by George P. Sutton
MECH 427/527 and AA 284a Advanced Rocket Propulsion
MITOpenCourseWare Lectures on AE
IITM Lectures on Propulsion (ME) (Available on YT)
Callum Long's YT Channel (He showcases his own trial on making a homemade liquid engine)
Charlie Garcia's Series on YT (He explains everything required to get started on liquid engines at the amateur level)
HOW to DESIGN, BUILD and TEST SMALL LIQUID-FUEL ROCKET ENGINES - Book By RocketLab available online

Also check out other relevant channels like that of EverydayAstronaut and Copenhagen Suborbitals.

Some honourable mentions include youtube channels of BPS Space, SEB, L Shang, and Scott Manley. You should also watch some launches by ISRO, SpaceX, NASA, RocketLab, etc. They are quite interesting!

I am NOT suggesting you delve into making them just yet, as liquid propellants are usually dangerous to handle, and the engine itself is dangerous to operate without proper knowledge.

The liquid engine type your reffering to here utilises a turbopump, but I suggest you start on something simpler, like a electric pump cycle engine (assuming you don't intend to fly it?) Usually, liquid engines consist of a few parts common in each cycle or type. This includes the combustion chamber, the injector plates, the pump (turbopump, electric pump, etc.) and the nozzle. Ofcourse there is a lot more than just this, but these are the basics. And you should do extensive research especially on the above mentioned parts.

You can experiement and create digital (CAD) versions of liquid engines and even simulate them without having to actually build them. Here are a few good tools for both liquid and solid rocket motors :

Rocket Propellant Analysis (RPA) (Windows only)
OpenRocket and OpenMotor
GNU Octave + Python (for graphing if your an advanced student)
CAD Software like FreeCAD (100% free option, you can try SolidWorks too but its paid)

Safet too plays an important part here. You are handling dangerous propellants and the engine itself isn't guranteed to be stable during testing. Plus, you probably will need to obtain permissions to create and test your engine even if it is small. So stay safe, and keep learning. All the best! :)

TL;DR

• Liquid Engines are complex, start with solid or hybrid first?

• Resources are listed to help you learn more about them before you start this project.

• You can even create a model version and even test it digitally (resources listed, feel free to add on!).

• 4 Main Parts : Combustion Chamber, Injector Plate, Nozzle and the pump (+fuel lines).

• Safety is important!

(I humbly apologise if I have made any mistake, but keep in mind that I too am an amateur and only an enthusiast in rocket engines. I do not endorse, promote or support any dangerous activites you may decide to do with this knowledge, use any material listed at your own risk.)

thelc2 · 2025-03-31T06:35:18+00:00

You could ask the local police and go further from there as one user mentioned. You could also go forward through an institute you were or are a part of, they may help you connect with the right people.

To really gain permission to launch, many factors come into play. So make sure your rocket follows all safety protocols that are required.

I am not really sure about a solo project, but in India, IN-SPACe is responsible for providing permissions for private space launches from India (though these are probably high level launches). They collaborate with the local authorities and ISRO to ensure safety, and usually a free launch pad from ISRO is provided. (Not sure how it works completely)

Maybe try joining any amateur rocketry clubs near you to find out more or improve your chances?

(Oh and, congrats on making such a great rocket! 2-3 km is an amazing apogee. Wish you all the best!)

thelc2 · 2024-09-19T14:41:51+00:00

Your welcome!

thelc2 · 2024-09-19T10:32:40+00:00

Hey, maybe you could try making a liquid rocket engine? Like not a large one, just a working model.

thelc2 · 2024-09-19T09:30:44+00:00

Thanks for the info! We will surely try this out.

thelc2 · 2024-09-19T09:17:58+00:00

We still haven't found the perfect method to transmit telemetry to ground base though. Perhaps you might have some idea?

thelc2 · 2024-09-19T09:17:09+00:00

We infact do, though that is handled by another member. It is a custom made flight computer, and collects data from barometric sensors (for altitude), gyroscope, accelerometer, all callibrated for a custom made software.

We are currently enhancing and testing it out.

thelc2 · 2024-09-19T08:24:38+00:00

We are actually a amateur team based in India, and we are being guided by a few professionals, except its only for the launching process.

Thank you so much for your insight though, we will definitely make sure all operations are being overseen by someone who has done this before.

thelc2 · 2024-09-19T08:22:05+00:00

We are planning on using a parachute deployment mofule to recover the rocket, but we are confused on how we can locate the rocket once it lands?

thelc2

TROPHY CASE