Flight Simulation - Landing Model Rockets Ep. 1

[@kanva4]

I smell an underrated channel

[@swupel3622]

Well Now its big

[@animationspace8550]

@@swupel3622 yes but no

[@swupel3622]

Animation Space Well I think over 100.000 is pretty big

[@animationspace8550]

@@swupel3622 My friends have over 100 subs so I consider it small

[@noahhastings6145]

@@animationspace8550 multiply that by 2000

[@clonkex]

"because the imperial system makes no sense" *clicks like*

[@Olijfberg]

amen

[@tobiasebastiantempella9792]

Same

[@pratikdedhia]

Haha, finally heard from someone in US😁

[@sebastiank686]

same here

[@corty8969]

David H sey

[@MansellRa]

Go metric system! Thanks for the detailed and practical instructions.

[@aaronmarkstaller]

Boo metric system! Go freedom units!! Lol no,... but seriously I got an 8lb rocket, so I need an 8lb motor to lift it up, and a 16lb motor to accelerate up at 1 G. I got a 3.9 kg rocket, so I need a ... something kg rocket motor, wait it's newtons for rocket motors, and a netwon is something, let me look back to childhood, oh yeah 9.8 newtons is a kg, so roughly 10, then I need a 39 newton motor And here's a copypasta from something I wrote a while back: The METRIC system makes no sense. What the heck is a Pascal? A mouse fart? Hey, this thing is pressurized to 69,000 Pascals. Wow! I have no concept of numbers that big. That sounds like a lot! Other guy: Actually, no that's not that much at all. This tire has 420,000 kilopascals of pressure. Me: okay, whatever that random dude's name's unit and number that is. Whereas psi is simple! Oh! I know exactly roughly how strong that is. And I can easily estimate how much force that would push on something with. I know how strong an air piston would be with that pressure, how big an object an air bag could hold up, how hard that would blow on me. And water pressure. Yeah that depth the water has this many psi. Yeah, I can estimate how strong that is. Metric: Ah, it's this many pascals. Okay how hard does that push? well if its a newton per square something and a newton is 1/9.8 of a kilogram, and the area of my hand is 0.0069420 of a meter, so it would push this hard on my hand... carry the two... It's just absurd. A Tonne. Or a Ton. Ah, I see, taken later from the imperial Ton just to confuse people even more and more on which one you mean when you say or spec for something. What the heck is a Newton? Ah, you see, you have to do some quick mental math and calculations to estimate how much force that is and how much mass something has or how much weight of objects or mass that much tension or force could lift. This car pushes with 40,000 newtons. Okay, what does that mean. Hey Honey! I'm home! Oh and I picked up 24 newtons of beef at the store today! Torque. I need to put together this thing. How tight should I tighten this bolt? So I don't strip it, or the material, or under tighten it so it comes loose later? Ah, well This one about 10 foot pounds, and this bigger one about 40 foot pounds. Oh, okay, I have this socket wrench that's about a foot long, so I need to pull on the grip with about 10 pounds of force. I'll pull about the same amount as a 10 pound dumbell. Or, my cat is 10 pounds, so the same weight as my cat. Then this one with the fore of a 40 lb dumbell. In metric its Newton meters. A newton, which is a small force I can't estimate, and a meter which is a huge wrench or socket or anything that nobody has. So this needs 20 newton meters. Okay I'll pull on it about as hard as 23 newtons if I had a meter long wrench and estimate that in my head. okay, I need to do some calculations quick to actually figure out that much, my wrench is 0.305 meters long, and a newton is 1/10th of a kilogram, so then I have to divid the torque by about 3 or 4, no wait it's multiply by about 3 or 4, then divide by 9.8, then that's 7.13 kg, what the heck roughly weighs that much, okay i've never picked up a 7 kg weight before, so then okay, a mid sized small dog, but not too small, and not the bigger sized small dogs... Also, bolts. An m6 is too small for the thing I need, but an m8 is waaay too ridiculously big, and nobody makes m7s, and the hole is too big and my plate needs a bigger ring around the hole to be strong enough now that the hole takes up so much space close to the edge, no now it cuts into my plate too much if I move it in, and an m10 is WAAAyyy too big for pretty much all applications except a car suspension, But imperial I have so many options to hold things together. And it's all base 2 fractions, which we should all know. 1/4, 5/16, 3/8, 7/16, 1/2 inch. Ah yes, a thou. This thing is 6 thou thick. Ah, yeah a thou is the width of a human hair, so I can estimate that. This thing is 0.0869 mm thick. Okay, so ... really small? The base unit for mass isnt even a unit, its a thousand units. oh this unit of measurement is about 1000 of these tiny units. I'm making a rocket. This thing weighs 1 lb, this weighs 5.5 lbs, this weighs 2 lbs. Okay, so I need an 8 lb force rocket motor to lift that up, and 17 lb rocket motor to lift it up at 1 G. metric. This weighs 465 grams, this weighs 2.9 kg, this weighs 800 grams. Okay, so I need to 2.9 plus 0.8 plus 0.48 is ... like... 4.3 kg. So I need a rocket motor that can push with 4.3 kg force to lift up, oh theyre not measured in that I need a rocket motor that can push up with ~43 Newtons to lift, and 86 Newtons to accelerate up at 1 G, Oh wait I need to add a 1.365 kg thing to it, now how much is that.... A weird fancy land where they have no sense for anything between two extremes of a meter, whatever that is, and a centimeter. Me: Oh yeah, that things like four feet tall. Bri'ish person: Oi! That things like 1.28 meters tall! Me: That buildings two stories, so then it must be around 20 feet tall. Bri'ish wanker: Oi mate! That buildings 2 stories so it must be around 6.72 meters tall! six story building, 60 feet tall. European 6 story building, 6 times 3 point something, remember my times table... like 18 or 19 point something meters.

[@j4s0n67]

@@aaronmarkstallergeez that’s an whole essay 😂

[@aviansnow]

@@aaronmarkstaller metric makes more sense

[@aviansnow]

@@aaronmarkstaller judging by your response you don't understand the metric system at all, also some of your calculations are wrong

[@rogaldorn605]

​@@aaronmarkstallerwait so your gripe is converting 3.9 kg to 39 newtons? you're a laughing stock

[@canadianstudentspaceinitia8812]

The future of model rocketry is bright! Also, glad to see the clearly more intuitive metric system being used

[@RocketSteve]

but then says, 'these are 3 inch tubes', doh! Lol

[@georgianbents]

@@RocketSteve That's incredibly minor. For people that sit on their ass all day, I guess it's important to be a fanboy of a particular system. In the real world, where I live and work, we use both systems when we have to and do the simple math to convert measurements, multiple times a day, every day.

[@RocketSteve]

@@georgianbents Clearly not with that reply. Perhaps you need to get out more, if I interpret your tone in the right way! Please don't cast aspersions on others from your 'real world'. Lighten up. The comment is light hearted.

[@JD-jp9st]

@@georgianbents Sounds exhausting

[@carbon273]

Well I think I found a project I genuinely want to do.🤔

[@maximo1590]

"Alexa who am I?" "The future of model rockets"

[@mortada2008mansour]

Elon musk: Am i a joke to you?

[@RadekSzabla]

"Everyone should use metric system because impreial system makes no sense ! " - that was nice :) thanks

[@jfider21]

you're the best. ill be sure to comment this every video. post as much as possible!

[@rocketnerd7763]

You look like Elon Musk

[@thevinkerry]

i thought so as well...like he is either his son or a younger version of him

[@aka0989]

maybe they both are alians

[@a-1b-2c-37]

@@aka0989 lol yeah

[@svesom]

Elon Musk? He is an Amateur. This Man is the new Space Hero. The Real Spaceman!

[@TalismancerM]

Didn't Elon mention his clone take-over strategy? I'm sure I heard him say that...

[@romainpoirier4200]

Nice work ! What about the evolution of the mass of the rocket because of the fuel being burned? When the second motor is ignited, the rocket is maybe 30g ligther. After all you're going to make a rocket so use the rocket equation :)

[@jacobmaizel5629]

Love this series already. Quickly convincing me to get into it myself

[@bdureau1]

I just loved what you said about working metrics.... makes a lot of sense

[@94akeepan]

Bro that LYING COW GIRL at 19:50. You got me pause for a while and laugh at it

[@AeroBen]

You think that the metric system is the best and have the same scale as me, you really drawl me in. Excellent video and I'm looking forward to the next videos in the series.

[@janismac314]

Hey I think there is a small error in your math. The integral of force is momentum. The integral of acceleration (or force divided by mass) is velocity.

[@BPSspace]

Janis M shoot, my bad! It’s correct in the simulation, I just said it wrong ¯\_(ツ)_/¯

[@janismac314]

BPS.space I was talking about the simulink model. Here's what I mean: i.imgur.com/e8sAOoA.png

[@BPSspace]

Janis M Wow, you're right! I can't believe I had that mixed up! That's some really basic math there, great catch, thanks!

[@sidharthcs2110]

That's not a small error. It's a fundamental error

[@vasari9198]

Kudos for not editing out your little mistakes.

[@hytralium]

joe: the metric system is better also joe: * goes on using the imperial system *

[@dixitkhandelwal1498]

BPS.space the block diagram (@ 14:10) of the simulation has an error. Velocity can not be achieved from Net force directly, You should take Net force/mass as input for the integrator (for getting velocity).

[@Papershields001]

There are really cheap and available miniaturized CO2 tanks out there for paintball guns. You could probably use those to as cold gas thrusters no muss no fuss.

[@KerbalChris]

Or little propane tanks or something

[@NICEFINENEWROBOT]

@@KerbalChris And little Oxygen tanks and Raptorette motors...

[@randomcuriosity9413]

You look like Elon Musk. This channel is great. I just started studying rockets and your channel has been very educational. Thank you.

[@salman_chowdhury]

hi, at 13:47 what is the Thrust Loss (1*u) multiplied with the main booster? is u=1 here? thanks. :)

[@tanmaychoudhary6360]

Man you helped me verify my graphs...thanks a bunch!

[@johnchansen6784]

I agree that the Metric system is superior. So why is the length of a model rocket tube measured in inches?

[@theelectricwalrus]

Not all the way through the video, but only the motor's propellant mass should count in the "wet mass" section!!! The motor casing is NOT wet mass!!! Loved the video

[@Tomwesstein]

Christopher Silvia exactly my thought

[@bennylofgren3208]

Christopher Silvia Unless it is ejected.

[@HB-jf6yq]

Is the motor casing classed as dry mass then?

[@NICEFINENEWROBOT]

"Knock knock!" "Who's there?" "FedEX delivery. One used SS20 from Moscow." --- "A-L-E-X-A-A.A!"

[@airborn6360]

If you want to know how many Newton’s your rocket is or how much it’s “weight” us F=mg g being 9.8 so before any ejections this rocket is being held down with around 8.3 Newtons and so a rocket motor with an average thrust of 11 wouldn’t do much. You can do more math to figure out what the acceleration would be but with .8 seconds and 8.3 Newtons to lift he’s right not the right motor. Just find out your acceleration account for the time and you can approximate V to and where the apogee will be which is where V = 0 until it starts accelerating down at -9.8 but quick parachutes !

[@mjolnirmotion2526]

i agree the metric system is better when measuring thing I prefer cm to inch and stuff but for degrees i prefer F instead of C i can read C but i need to first convert it in my head to F which takes about 3 seconds but its annoying but i can do it

[@theelectricwalrus]

Just a quick question: do you have any plans to add a sensor for altitude measurements? I know SpaceX uses radar. Also, any plans to add throttle control with two 2-axis motor gymballs?

[@TheSweetlio]

Guess what the BMP180 is for :)

[@piyush9555]

your eyes clearly display your reduced sleeptime for your projects

[@JoshKaufmanstuff]

Awesome video! I think you have been wearing your sunglasses backwards

[@destaw333]

i have already joined you as beginner. and i am sure i will do great thing with your interesting practical legend. thank u Joooo

[@kemfic]

no one makes you get excited over spreadsheets like Joey B.™️ does

[@BobbansRobobtics]

Great video series, you should totaly make a podcast

[@futureradius]

I like watching these videos man :D

[@deltametaYT]

Variable thrust control? These motor burns are relatively constant when they fire, after the initial thrust. Can altitude sensor and velocity sensor combine to adjust the thrust to ensure that the thrust burns at just the right rate to achieve a suitable velocity immediately prior to landing? Is there a way to control the output of the thrust of the retro motor so that it performs dynamically?

[@tejaspatil3133]

You are so hard worker.

[@paulchatel2215]

Does your simulation take into account that the mass of the motors are changing throughout the flight?

[@gblawrence034]

I know I'm super late but I'm confused about something. Why's he integrating over the force instead of the acceleration to get the velocity?

[@ashwinchander1837]

can you please suggest me an online resource for learning matlab for applying mechanical engineering concepts?

[@joe_man968]

Barnard:Let's say our motor has a mass of 5000000kg Amateur rocket reaches space! btw i love your work

[@shadbakht]

Instead of going by time (to initiate the rocket for landing) can't you install some kind of mini-radar on the rocket to initiate at a given distance from the ground?

[@skiptastic1000]

That METRIC plug is necessary. Thank you.

[@talhajaved6853]

This is amazing!!

[@thechaddad1609]

"The Imperial system makes no sense." also "These are 3 inch tubes"

[@larryjing]

Have you considered using reloadable CTI or Aerotech motors? I'm not sure what the benefits might be exactly, considering your usage but in my experience they are generally more reliable and stuff

[@Rabianurguven]

Too much more so THANKS for this informations and good expressions!

[@pingpong9656]

In construction, imperial is vastly superior to metric as it is far more intuitive on the human scale and easier to visualize.

[@Rutherford_Sam]

Metric is just ×10

[@dougrobinson2024]

dammit, you woke up my Echo 0:09

[@sil8127]

I wonder how closed loop the landing system will be? How much it relies on external inputs instead of just using a countdown for example

[@nathanaelvetters2684]

Is dropping from a meter up acceptable? I'd be quite amazed if it could stick a landing after a meter freefall. Another question: how will you burn the landing motor after the ascent motor has fired? Will the ascent motor be jettisoned?

[@alessi4249]

Could this be done with energy to calculate when to fire the motor? You have the energy of the motor and you can then calculate what the height of the rocket is for PE and you know its speed for KE so you just fire the motor when the potential energy plus the kinetic equals the motors energy?

[@nucspartan321]

Great video more like these please

[@AlexamBoden]

Can you do a tutorial for the landing legs?

[@phoenixcollege6608]

necesitamos mas gente como el

[@muah_izotova]

I thought in order to get linear speed it is necessary to integrate acceleration, not force?

[@synonymiumone1003]

What is a good alternative for mathlab? Since the licence would ruin me financialy😄

[@airborn6360]

BPS.space do you know any thing about making your own rockets and what dimensions you’d have to use in a homage casing to get thrust out of your propellant

[@toastom]

Such a cool flight sim wow

[@joshdawkins3853]

Hey so like are there "free" alternative versions of programs like this ?

[@yipengni3439]

Is there an app similar to simulink but free?

[@adamwojasinski6318]

I don't know if I'm right, but why you don't divide the integrated force signal by the mass? If you want to get a velocity you have to integrate an acceleration not a force. I will be grateful if you explain me this :)

[@Jirayu.Kaewprateep]

📺💬 Before continuing press like, all parts are designed with balances open / clone parachutes sample combined into a model. 📺💬 Impulse ranges B had twice of impulse as A and C had double the impulse as B . 🥺💬 You are correct all parts are well designed not powerful only but continuity smaller impulse or hard contrast force. 📺💬 We have some calculations here, 3.1 seconds is a good burn time which is gravity force. 📺💬 A block diagram in MATLAB Simulink we can build a simulation of thurst feedbacks system because you need to control the continue force apply to an object and response to the environment. 🥺💬 That is one hard part not only the simulation plotting but solution when you build system that Automatic control the engine .

[@JLukeHypernova]

The flight computer looks like the space station from 2001

[@abbeytheoctopus2772]

Simply lovely.

[@jaybabcock9123]

Your mass when you burn the landing motor will be less because you already burned the first motor.

[@tomgeorge3726]

Thank you Joe for taking the time to explain the concepts while doing your interesting development work. Can you format your columns to display 2 or 3 decimal places as the case maybe, it will help with scanning your columns for any keyboard entry errors?

[@marco5855]

I'm having trouble with the delay block, if I use it like in the video, nothing works in my simulink model, can anyone help?

[@NICEFINENEWROBOT]

Waiting for the Raptorette LOX LMethane motor.

[@jesselivermore4318]

impressing, chapeau bas.

[@BrandonKent136]

You should be able to add the drag force to your simulation. You have all the parameters you need except drag coefficient. Just estimate it. It will be a much better simulation that way.

[@lasooo_man]

+BPS.space This would make it possible to time the delays pretty much on point and reduce the test runs. The math is not that hard either. This is probably a fun way of over engineering the rockets. Would love to see it

[@A-tech]

can you make the landing motor turn off or be restricted instead of timing it to burn out?

[@notaname8140]

I realise I'm very late, but once a solid rocket has been ignited there's no real way to turn it off again, he's really limited by his technology, a hybrid motor would be a lot better for landing but they're far more complicated

[@darnit1340]

you triggered my alexa xD

[@xXrandomryzeXx]

I so agreed when he said the imperal system made no sence

[@vyktorio805]

ur awsome, coolest guy ever. U created "miniature space program" or "MSP"

[@sorabhbordia4158]

hey joe, can you pls provide these files for free as I am not sufficient to get a patreon membership, also I want to learn model rocketery and I am greatly inspired by you

[@markodhiambo6457]

The imperial system makes no sense...... I second that

[@tanjiralam9185]

How do I find these stuffs if I really want to make a home made rocket?

[@TheNikhilmishras]

Can someone link some tutorials to simulate models rockets using rocket.. I want to understand and do it on my own! Thnx Joe!

[@SaeedAcronia]

Why did you consider mass constant?!

[@JoshKaufmanstuff]

Does this simulation take into consideration the weight of a spent rocket(s)?

[@Ki11aWi11]

Hi Joe, how accurate are the thrust curves on those Estes motors?

[@BPSspace]

Super accurate! I'll show some test data in an upcoming video, but it turns out that these motors are more consistent than you might think!

[@fabricioverhagen]

hello how's it going ?, I'm watching the series and the truth is that I am very interested in everything but there is a small problem that I see with the subtitling in Spanish that KZbin gives you automatically, it is a great series and it would be much better if there were a format to Spanish you would have many visits. Thanks for your attention

[@jfider21]

i have an idea. you should make a builders box with all the materials. set a cost and then do a video for people to follow from those parts!

[@sauravprashar]

Sometimes space simulations are not what you think

[@dr.rubbertoe7318]

thanks for triggering my alexa. lol.

[@Redafto]

you definitely need a closed loop control

[@Inquire98]

"Good", very good 😉

[@kevint1910]

LOL some one has not slept in WAY too long

[@minegun7248]

Just imagine the kids here wonder what the hell are Newtons

[@rodrigolopes81]

witch software is that?

[@XDslic]

Pound is the superior weight system

[@hadiputra2871]

I can feel that rocketry will be my next hobby. But, I'll start with water rocket. huhuhu.

[@overflowing1134]

From where can we get motherboard

[@gregoryfranco4688]

Tienes que hacer contenido en españor

[@phoenixcollege6608]

Learned alot tysm

[@정재민-k4u]

How to get Basic Flight Simulation?

[@fagocitotico]

he explains about the arrows of simulink which is obvious, but dont explain nothing about the blocks used.

[@sauravprashar]

Can i do this kind of simulation in Xcos

[@allanperez7356]

Hey man! I love your channel. I was wondering why the retro boosters are configured by timing. Why don't you just configure by altitude?

[@BPSspace]

The burn is triggered by time in the simulation for no reason, simplicity and maybe a touch of laziness I suppose. :) The actual retro burn for real testing is based on altitude and a few other factors, timing would be far too unreliable in real life!

[@allanperez7356]

@@BPSspace will you do videos about more accurate flight simulations ?

[@BPSspace]

@@allanperez7356 Sure, I can cover that! It may not be for a little while, I'd like to get some more of the flight computer/software/hardware stuff covered first.

[@Zplizor]

maybe port the code to scilab ? :)

[@mghemke]

Nothing says hobbyist like using $10,000 dollars worth of software to design a $300 rocket!