Arduino Rocket Motor Thrust Test Stand! - Elementalmaker
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- Опубліковано 2 жов 2024
- Here we slap together an Arduino based rocket motor static thrust test stand.
Please help support the channel on PATREON so I can continue making videos! / elementalmaker
Links:
Arduino Uno R3: amzn.to/2QhskRv
10Kg Load cell & HX711 Board (You can probably find better): amzn.to/2PohhAN
LCD Keypad Shield: amzn.to/2E9q6fN
5V Relay: amzn.to/2SEgqhn
In addition you will also need some jumper wires, and a 10+ foot USB 2.0 Cable - A-Male to B-Male to log the data to your laptop.
Link to PDF by Nick Cinquino and Len Johsnon: archive.org/de...
The above are amazon affiliate links which earn the channel a small commission and help me to produce the videos.
i love it when the youtuber doesnt care about monetization so just says all the hilarious shit
yes I love it just say 321ignighoun
He said Penis!!🙊
Wooah I just said Penis!!🙊
Crispynugget even after all that, he still got ads on his video lol. Feelsgoodman
For now at least. They just demonetized my top video :(
Estes vs. suborbitol vs. rocket candy. Need to see it.
Let's make that happen 👍👍
your commentary is all time!
If you notice when the rocket goes off the base actually flexes downward because of the soft grass. You may get better results beings on a more stable/ harder surface. Awesome video man, love your content.
Yeah I did notice that when editing the video. I am sure it did somewhat skew that data, might have shown a bit more thrust if not for that grass compression. Good eye!
@@ElementalMaker yea man thats what i was thinking, i doubt it would have made much of a difference but hey man the motors kicked ass thats what matters.
I watched this video the day after it was uploaded, subscribed and then purchased the UNO shield, load cell and HX711. It arrived today and i can push on with my build!
Excellent channel, great work :) thanks for frequently giving me the giggles "Jingle ma ballz!" lmfao
That's awesome Tom! It's a very fun project that teaches alot of the basics of arduino. Always happy to provide a chuckle. Let me know if you need any help with the build 👍
Haha. I hear some of that AvE Schtick! Lol. You both combine the right balance of information and comedy! great channels!
Yup! Before I knew he watched AvE, I was pretty dead set on it, because of the way he speaks!
i agree
No units on the graph huh, let me take look...
Ah yes, it appears the vertical is in millifucks given and your horizontal is in seconds after waking.
It's accurate, but I just don't remember participating in that study.
Haha love it!
My millifucks usually don't get to a maximum before at least 20000 seconds after waking. Yeah pretty flat curve.
Could you compare normal rocketcandy and your sorbitolbased fuel? I´d love that!! Great video by the way!
I'm sure I could do that down the road!
@@ElementalMaker I'm looking forward to that!
Man, that was a fast turn around for that project! Fun video. I would not have guessed that 3/4" would produce 6 lbs. of thrust.
Yeah I cobbled that sucker together quick! I too was surprised by that thrust.
Heck yeah man!! Blowing my mind with the rockets
Could the double spike on the small engine be when it moved in the tube? Maybe a poly tube the right size for the engine would give a cleaner curve?
Or just a piece of crinkled paper shoved between the 2 tubes.
Yeah I do need to make a sleeve to keep the smaller motor more constrained. Maybe I'll finally put my 3D printer to use!
Has anyone told you that you are like a normal AvE?
Is there such a thing as a normal AvE? LOL
My wife also might have a comment or two about me being "normal"
Dude, you sound a lot like Patrick Warburton (Puddy from Seinfeld). I don't remember exactly how I found your channel, but I'm glad I did. Cool stuff, man!
Haha I hear that quite frequently! Thanks! 👍
Wish this was for raspberry pi. I need to build my test stand.
Also this will always be progressive burn being a single fuel grain with one uninhibited fuel surface.
This is where multiple Bates grain motors come in. You can actually tune your thrust curve. Progressive, neutral, or regressive all by changing the length of a Bates grain with 3 uninhibited burn surfaces.
Thanks for the video. Keep up the good work.
Actually for little uncomplicated setups like this one Arduino is the best. Read a sensor, send data to serial. Rinse, repeat. Low cost, easy to program and debug. If you choose the right components you can place a whole data acquisition system on a C-engine rocket (done that with an Arduino Pro Mini). Can't see a RPi making that flight. :)
@@stamasd8500 mainly I would like to make a test stand. Bought the Rpi for doing projects with my son. Now I'll have to get a adrino to do my own projects! Data acquisition I'll just use my apogee device to give me the basics.
@@rizin2213 Both the RPi and the Arduino are adequate for a test stand, but I tend to favor the simplest approach to reach a goal. Arduinos are cheap, plentiful and easier to work with. I have several dozens of them in projects I built. The last one was a digital frequency synthesizer using an AD9850; currently working on building a high-temperature kiln, and the kiln controller will be another Arduino. A RPi would be overkill, unless I decide I want to stream live video from inside the kiln. :D
Nice test.
Might want a concrete block or slab on the grass underneath, the larger engine thrust the whole plate down and it rose back up during burn and data capture
someone who built the test stand?
I am having problems with the operation.
when I connect the arduino the relay is activated and deactivated immediately after the yellow led makes 4 sequences of 4 blinks (as far as I can see), the lcd says "MODEL ROCKET DYNAMOMETER" and the serial monitor says "HX711 Rocket Motor Dynamometer, V .5 Affix motor nozzle up. Place igniter in nozzle. Move away from teststand. Press start button to initialize ignition sequence. "
when I press the button it does nothing. on one occasion it started taking readings (very slow about 1 per second which I think is the calibration of the load cell) and when I opened the serial monitor the code restarted and no longer worked.
I have an XFW-HX711 I desoldered the jumper that I had at 10Hz and I soldered the 80hz one, as it didn't work, I used another XFW-HX711 WITH 10Hz and it didn't work either. Any idea what is happening?
EDIT: Here is the update code
#include
#include
LiquidCrystal lcd(8,9,4,5,6,7);
const int buttonPin = 12; // start sequence button
const int ledPin = 13; //LED indicator and/or buzzer
const int igniterPin = 11; //igniter transistor circuit
int buttonState = 0;
#define DOUT 3
#define CLK 2
HX711 scale;
float calibration_factor = -1120; //-560 works for my 10kg loadcell.
void setup() {
scale.begin(DOUT, CLK);
pinMode(buttonPin, INPUT);
pinMode(igniterPin, OUTPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
Serial.println("HX711 Rocket Motor Dynamometer, V.5");
Serial.println("Affix motor nozzle up. Place igniter in nozzle. Move away from teststand.");
Serial.println("Press start button to initialize ignition sequence.");
lcd.begin(16, 2);
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" MODEL ROCKET");
lcd.setCursor(0,1);
lcd.print(" DYNAMOMETER");
delay(2000);
scale.set_scale();
scale.tare(); //Reset the scale to 0
long zero_factor = scale.read_average(); //Get a baseline reading
Serial.print("Zero factor: "); //This can be used to remove the need to tare the scale.Useful in permanent scale projects.
Serial.println(zero_factor);
Serial.println(" ");
}
void loop() {
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Rocket Dyno");
lcd.setCursor(0,1);
lcd.print(" STDBY " );
scale.set_scale(calibration_factor);
lcd.print(scale.get_units(),1);
lcd.print(" g");
delay(500);
buttonState = digitalRead(buttonPin);
if (buttonState == HIGH) {
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" Rocket Dyno");
lcd.setCursor(0,1);
lcd.print(" STAND CLEAR!");
Serial.println("IGNITION SEQUENCE ACTIVATED!");
for (int i=0; i
pretty neat! would be interested to see how your rockets compare to a commercially available one!
someone else watches Ave methinks :)
great video as always :)
*AVE's twin brother*
They do sound oddly similar
It seems I missed your last few videos😐
I need to catch up...☺️
Nicely done
@ 9:00 it will be stiffer and blacker than normal. Some one will be happy.
Hahaha 👍👍😂😂😂
I am needing your help. My students are following your work. We build your load tester. We used the published programming. But it has an error we can’t fix. Could you possible send us a copy of your actual programming. It is for my high school students. Please let me know. Thanks
Hey Gary, I can certainly do that. I'm on the town tonight, but will set a reminder to post the actual code I'm using.
If you want to use the 12V battery, you could probably just put an inductor in series with the match. That way it'll impeded the current change and heat the nichrome slower.
Very good idea. I did design the igniters for use with 9V, so I should have know better than to use 12V, but the inductor idea is great!
This is almost like another AvE channel... nice! Subscribed..
Thanks for the great video! I took your design, referenced Nick and Len's PDF file, and built my own version of the rocket test stand. It works fantastic!
I'm using a 10 kg load cell and added a large 4" seven segment display sitting next to test stand with a rotating red light on top. I installed an igniter enable switch (safe/arm) that also checks continuity of the ematch. After modifying the graphical user interface code, I purchased a 50 ft active USB cable so I can sit 50 ft away and Trigger the system through the laptop.
I then added a plexiglass blast Shield that I placed in front of the test stand to catch any Rogue fragments coming off the motor.
It's amazing how sensitive the system is. Kudos to you and those who help develop this Arduino system!
You should do this testing with all sort of different mixes of rocket candy, sorbitol red iron oxide, black powder, powdered sugar rocket candy.
That's the plan! Also different grain and nozzle configurations 👍
@@ElementalMaker Yes, good, I expect to see 2, maybe 3 thousand videos on this test stand! lol
The extra spike on the small motor, im my theory, may be due to nozzle erosion. Usually, the grain is larger in diameter to the nozzle, but given the simple nature of your motor, its relatively unavoidable. The heat melts the propellant before it ignites and creates blockages in the nozzle. Be careful for CATO's on the smaller motors with smaller cores because of this!
Yeah that's what I believe it was. On the thrust curve you can see it almost dropped to zero, would could definitely be explained by a blockage. Very good insight thanks for the excellent comment 👍
So are we going to see a comparison of different motor shapes power output/time ..... or do you think it is all fairly irrelevant compared with the effort of machining several formers?
Gotta love electronicals. Great setup. Love that you do all the things we have all wanted to try.
I seen a video on youtube some years ago. It was how to make gun powder from hardware store bought stuff. Can't seem to find it any more. But all I remember it was stump remover, Charcoal, and a gardener stuff for the sulfur. Have you ever done something like this? How would that work? Sorry just can't find that video and don't remember who made it.
I've done this recently. Use this formula: 75 percent (by weight) potassium n*trate, 15 percent charcoal (make your own, don't use Kingsford....I use light wood like pine and sumac) and 10 percent sulfur powder. Dudadiesel.com out of Alabama is the best source for the potassium n*trate and sulfur. 10 lbs n*trate and 1 lb sulfur +shipping/hazmat is about 40 bucks all in. Grind/mill everything in a ball mill or shaker bottle with .50 caliber lead balls (be gentle). Once down to fine powder (airfloat for the charcoal), mix them well. Add a solution of 1 part 91 percent rubbing alcohol to 3 parts water until it forms a paste about like thick cake batter. This works the n*trate into the pores of the charcoal. Spread it out on a cookie sheet and put it under a fan for a day or so. Crumble it up when dry to the desired grain size. You can also add some dextrin (easy to make from cornstarch at home) at 1 or 2 percent to hold the grains together well when you mix in. (Sorry for the asterisks in N*trate, I'm keeping with EM's UA-cam PR Policy). You will get some GOOD lift powder out of this.
Nice vid but force isn't mesured in g but in Newtons (your 658 "g" peak value correspond to roughly 6.58N of force). Anyway keep up the cool stuff ;)
This project really cool. A few years back I help my son with his science project. Homemade rocket motor thrust tested with a kitchen scale and the Galaxy S4 filming at 120 frames per second.
Very cool idea! Man that had to be a pain to go in and record each value. Was the refresh rate of the scale anywhere near the 120fps of the camera?
I’m getting some Negan vibes from that voice 🤔
I hear that quite often, but can't hear the similarities from the Negan clips I found.
How can I contact you to send you some free stuff (nothing hazmat, just casings, tooling, etc) for these projects?
Thanks so much Luke! You can email me at ********************************. I'll delete this shortly so I don't get spam blasted, but you should still be able to see it in your notifications.
LOL good catch sir. Ill edit that out now!
It'd also be interesting to see what the total impulse of each engine is. also, it would be interesting if you had a real-time clock module and an SD card module so you could save timestamped data directly to an SD card in csv format instead of having to copy out of the serial monitor.
The millies() function in the Arduino returns milliseconds since power on.
God damn this is awesome. Is there any way I could get a picture of the whole arduino setup? I’d love to build myself one of these
So sweet when you see a plan come together! My kind of power. Keep up the language brother! This channel only gets better .
Thanks Kenneth!
Hello! Thanks for making these videos. The circuit schematic in the PDF shows a yellow LED and a transistor; I dont see these on your board. Can you please share your breadboard schematic? If possible, can you please email the breadboard schematic? I will really appreciate it. Thanks!
Now estates comparison
Will do!
Hi, ElementalMaker, you may want to check out the Tech Ingredients channel as they are doing some very interesting experiments with different grain formulas and ignighters. I have tipped them off about your excellent rocketry experiments. Be warned that they have a very different style to you which you may find a touch slow but the science is worth watching
Cheers. Mark
Wow! That's impressive and Fun. Hey just an Idea to create the best of both worlds. How about the 1/2" tube with a smaller bore and try to make the burn rate progressive as opposed to digressive. Thus giving you and longer higher energy burn? Not an expert here in this space though in other areas this can give you an longer more sustained burn while the energy output increases. Keen for your and others feed back on this idea? Cheers and thanks for sharing.
Wow, that's some serious power for a few grams of sugar. Not many things give you that much energy from a few grams...
Talk about a sugar rush! LOL
Okay! I made this! It works! (Still need to mount it) Don't know how else to post this with highjacking a slot here but here is the video link. Rocket Dynamometer
ua-cam.com/video/T7vXEij26YA/v-deo.html
I'm actually feeling a little bit of poster's remorse here. If you don't like my link you can delete it. No harm no foul. Just want you to see it first.
Very Cool! When we were flying rockets the only computer around was "Univac"! I doubt they would have let us borrow it... )
Why is important to do testing?
Rocket motors from Estes, already have data and charts up on their website.
I am making a rocket, so I was wondering what good does this test does to the overall project?
Thnx! Great Video! :D
It's about exploring the science of making the motor yourself, then getting data to quantify that motor.
@@ElementalMaker Oh, I assumed very one got them from stores. Can you link me to place where I can learn to make Rocket motors safely.. :D
Thnx for the reply! :D
@@TheNikhilmishras here's my video on making rocket motors: ua-cam.com/video/5Ug9NQqmANU/v-deo.html
Awesome. 9:50 2.6 kilos of thrust could lift up how much mass off the ground??? And thanks
Nice setup!
Would be nice to see if you get better thrust by reducing the outlet from the bigger rocket. Try jamming a hex nut in the end and lock it in with epoxy, should allow for higher combustion chamber pressure, longer more even burn, and higher exhaust velocity, while also adding a bit of weight to the bottom of the rocket, making it more stable in flight.
rulof maker is copping your videos and ideas watch his latest 2 videos ...
Thanks for letting me know Bob. Not sure there's anything I can really do, since he didn't actually copy my video, but just the process.
@@ElementalMaker He is making a fool of himself by the way he does his "chemistry" with no knowledge or safety ...
@@nick5625 I don't like Rulof... He has fake videos as well (ua-cam.com/video/vpWumPqKB9Y/v-deo.html, ...).
Used to like him a few years ago. I was naive. xD
LOL that video is hilarious! Eh what can you do though, we all copy each others stuff to some degree. Its the circle jerk of internet life. I just try to give credit where credits due.
What is it with you guys LIGHT THE FUSE AND RUN LIKE HELL!!~!~!
Fantastic video and channel! I'm in the process of creating a test stand for undergrads as my masters dissertation and I'm just wondering what you would improve upon if you were to make this test stand again? Which Board would you use instead? Furthermore, how would you go about igniting the rocket using LabVIEW?
Hi George, The stand works quite well as is, only change I would make is a nice housing for the Arduino and HX711, maybe a custom board of some sort would be best. Its been a very long time since I worked on LabView, so I can't give any input there.
@@ElementalMaker Thanks for the reply! I'll for sure shield them when I begin testing my own propellant. Another question (if you don't mind!) but do you have any advice or resources that would help if I were to add another load cell (measuring fuel) and a couple transducers (exhaust temps) to the design?
@@Epic2Dive In all honesty I'm not that handy with Arduino, so I cant say how it would be implemented, but I am sure you could also use a HX711 and load cell to measure fuel mass (assuming you are using a liquid fueled rocket?). I am not sure if there are any existing temperature transducers that could survive the pressures and temperatures at the nozzle orifice, but perhaps a thermocouple could survive inside the combustion chamber.
Got maw Arduino goodies coming. Can hardly wait. I'll be happier than a puppy with 2 peters.
I may have to steal that line! LOL that's great! Let me know if you need a hand with anything. I'm not the best aurdweener worker, but I got this project down pretty good 👍
I WANT TO MAKE AN ENGINE THAT WILL MAKE A 5 MINUTE BURN I KNOW IT IS NOT LEGAL I JUST WANT TO DO IT & SEE HOW It FLYS
Lol this was uploaded while I'm playing KSP. How soon will you make to space?
Where do you get those paper tubes for those motors?
Awesome video.
On the first engine, we can see the base of the scale moving downward because of the thrust, then back up.
While it wouldn't change the area under the curve because the whole setup "rebounds", it makes your curve a bit off. So the actual curve should actually look better (the thrust is highed than shown on the first part, when the base goes down, and lower when the base goes back up).
For higher thrust engines, do the test on harder ground for more accurate results.
By the way, you used a 10kg sensor right ? Did you update to higher load cell later ?
Yes both a larger load cell and the ground movement have been addressed in newer tests. Much larger motors behind tested as well. I have done videos on them
@@ElementalMaker Yep, I've seen your rocket related videos.
Does the larger load cell has a decent sensitivity for smaller engines ?
I saw yours read a 42kg thrust on the 3-grain engine, so, I do guess that's.... a bit over 10 ;)
@@xialemai6412 yes the 50kg load cell seems to be just as accurate for smaller engines as the 10kg was. I was expecting some accuracy loss, but nothing detectable occurred.
@@ElementalMaker Oh damned ! I just received the 10kg load cell....
Well, I guess I'll have to stick to small units for now ;)
can you explain the electrical components connection setup
*freshmen robotics flashbacks I N T E N S I F Y*
HAHA Love it
Pretty solid EM.. Pretty damn solid.. you sir are making some stellar videos these days! I like the test rig. I'm curious how sugar powder based motors perform.
Thanks! I'm sure I'll test some sugar based engines soon for comparison 👍
ElementalMaker I thought you said they were motors, not engines, lol. Just me acting like an ass because at my "advanced age" I think I deserve it.
That was som mighty fine pixie wranglin' there!
Do you have a link for the code? And great video BTW.
I have always found it more fun to say 321 ignision
Great video. You can do various comparisons of different fuels and I think most people would be entertained for quite a while.
Yeah I plan to do quite alot of tests with this sucker! Even get into some experimental composite propellants 👍
brilliant
Oh you, This is What my current project is,.
nice man :)
Sorry I'm late to the party, but just by an eyeball average, it looks like you're getting around ~30 seconds specific impulse (closer to 25 for the smaller, 35 for the larger). IIRC, KNS fuels have an upper limit of something like 120 seconds, but I don't recall whether that's a practical limit or a theoretical limit. So there's definitely room for improvement, but it's not bad for how simple those motors were. I saw other questions about how to calculate specific impulse: specific impulse is the exhaust velocity divided by earth standard gravitational acceleration (9.8 m/s/s). Average exhaust velocity can be calculated by dividing the average force (in newtons) by the average fuel consumption rate (in kg/s).
As a sample calculation, I'll start with the larger rocket graph. The bulk of its firing occurs between 0.4s and 1.5s which gives a fuel consumption rate of .034kg/1.1s = .031kg/s. With an (eyeball) average force of ~11 newtons in that interval, that gives an exhaust velocity of 11N/0.031kg/s = 355 m/s. Divide that by 9.8m/s/s to get a specific impulse of about 35s.
I always look forward to seeing your comments and as usual you do not disappoint! Thank you for the sample calculation too! That certainly brings it down to a level even I can understand. Let me know if you want to see the actual data, I could send you the excel sheet if you interested.
Are you related to AVE?
Nope
I built the hardware for this, but it seems that the sketch for the HX711 has changed from its original form and will not work with Nick and Len's original sketch. Any ideas on how to fix this?
I do recall it took some tinkering to get the code to work. If you can shoot me your email address, I will send you the code I have working. I think the big thing was updating the code to call out new libraries, as the ones called out in their original code were not available.
i am so impressed but unfortunately im stupid! you covered so many things. what is excell and could you do a video on it. could you do a more detail on how you hooked things up. what type of webcam are you using. please keep in mind how dumb we are. you not as confusing as chemistry but almost. im still trying to understand gravity.
strap 50 of the big motors to you , then fly rocket man! Awesome video 👍
LOL that would be one hell of a ride!
This gives me flashbacks of my engineering controls class using LabView and setting up all the damn wires. Undergrad sucked but payed off
Lol I feel you on that one. I think I still have my NI LabVIEW module hiding out somewhere around here
use hysteresis/averaging for the display values! (while still recording the instantaneous values)
This program does average a few values to build in some hysterisis.
Test an Estes rocket engine to compare performance of your diy motor.
Definitely will do!
Dear Sir
I found the Arduino program that works for me.
Thank you very much for paying attention!
Respectfully
NICOLAE
05/04/2020
What was it that fixed your problem?
I'm sorry im not in the position I can be a patrion, if I I had cash this channel is the place id send it. You have a lot of top vids surely this channel will take off when pewdee fucking pie acts like a god ffs.
No pressure, I just appreciate you watching! Thanks for the kind words.
So you got safety glasses for your eyes but noting to cover the electronics in case of a burp or hot chunks from the rocket.
Eyes can cost many tens of thousand dollars to fix, the electronics maybe 20 bucks.
@@stamasd8500 Very true. But he already had the eyes covered. I just thought he could save the electronics from a toasting with something in the shop just to cover them.
And on how much eyes cost I know after 7+ hours between both to repair a tare and other damage. Not caused by doing anything stupid.
Sean Not-telling I've been wearing glasses since 14 years old so almost 40 years now. One day I should calculate how much I spent on them overall, the total won't be fun.
@@stamasd8500 I know. After the surgery one eye stabilized quickly. The other one took it's own sweat time and I was having to have the lenses changed every 2 months or when the headaches get bad enough that I would go have them retested. Sure enough the Rx had changed so much that it would be time. That went on for about 2 years.
@JRM No No it was working up some heat so it had to perspire.
Could the sample be backwards on the chart like right to left instead of left to right that would make since on the curve the small motor seemed to be opposite of the chart
Nah the data is what the graphs show. Good burns and good thrust, just not optimal thrust curves
Bigger core-gap will give quicker climb in thrust. Also dont make the core-gap too deep or you may blow out.
Good tip!
Why Arduino program of work are dealing with here is not working and how much they should pay to get the one that works?
I'm sorry but can you please clarify? Your question does not make sense.
Love this I set up a stand that measures heat and pressure on my second stage but thrust is a bit much for my brain to do
Thats pretty good for a 15 years old camera
yeah it wasn't a cheap on back in the day. Still though was only a few hundred bucks. Its an old Samsung HMX-H100, I think the first year they started making them.
How did you solve the problem of erosion of the opening on the Rockets clay nozzle?
Still seeing erosion. Working on some new nozzle compositions to minimize it, but nothing to successful yet
@@ElementalMaker is there any way to fire the clay so it becomes somewhat of a ceramic? Or maybe there is a compound that can be use instead that can be fired at low(oven) temperatures without needing a full kiln.
@ald88cod very good idea! I'll have to try to find a washer that fits just right, or just machine a bunch on my lathe! The nozzle composition is quite inert, it's 50/50 bentonite and grog (an inert ceramic) with paraffin added to help it bind when pressed. I am going to test adding aluminum oxide and other refractories to see if I can avoid the washers, but that will definitely be something I try!
@@ElementalMaker seems right off the bat that the paraffin will melt because of the temperature the burning fuel so it will lose all binding properties. I just saw a video where guy used a 50/50 mixture of Portland cement and Durham's rock hard water putty for his compound and he also Incorporated a washer to control erosion somewhat.
@@ElementalMaker last thought for the night and then I'll shut up. Plaster of Paris has a working temperature of up to 1200 degrees Centigrade so that's starting point for refractory mix, adding perlite like they do for forges might help also. I think they also use a little bit of silica sand in the mix. Just some thoughts from a sleep deprived addled mind. God bless you all have a good night.
I cant help but think the cantilevered beam load cell would indicate different loads for different placements of the same motor. (I.e., place the motor above the mounting screws vs place the motor at the end of the beam) Is there a sweet spot to place the motor?
I though that would be a major issue as well, but I tested placement of loads over the entire surface of the loading platform and it was incredibly uniform. After thinking about the force diagram for a bit though, it makes sense that the load is uniform.
@@ElementalMaker I read this after making a whole bunch of averaged measurements all over the platform and head scratching.
I have about 2lb. of sodium sulfate mix it with potassium nitrate and lite the fuse what would happen
No real reaction. The ions will simply swap partners, but it probably would only work in solution and not be an ignitable reaction.
how did you make the propellant can you give a detailed information of preparation of propellant
I have many other videos showing how I make various propellants
I love techniligy!
Would it matter that the small engine was facing at an angle and us having more leverage on the thingamajig?
Its possible, but once ignited it sat pretty vertical, any data skew from that should be quite minimal, and if anything lower the measured thrust a hair.
I think it's a very good that you live in the East and I live in the West separated by many states. Because if we weren't, we be doing this stuff together all the time. Looks like I'm going to have to pick up an Arduino. I've built raspberry pi stuff for years time to switch to something with an atmega. Your channel rocks man. I built a scale using a fish scale.that works, but it's not as accurate as yours. Good job good job.
Thanks Jeff 👍 I've never messed with raspberry pie, but I'm sure you could do the same thing with one! This was actually my first big arduino project and I was really impressed with it. Bought it years ago but never messed with it aside from some basic programs. This was definitely a fun project, if I'm ever out west we'll have to do a video collab!
I'm looking pretty heavily into this and checked out the pdf on it. Sad to say, I have very little knowledge on circuit board diagrams. I think it would help a lot if I could get a more detailed picture of the breadboard. Any chance you could send something via email?
What would be the g-force if you had 50 the the 3/4" motors banded together lifting a payload of 150 lbs?
And..how high would that payload be lifted before the rockets burned out?
Thanks for sharing!
Nighthawk sent me!
How to connect to software?.
arduino! cool
Now the real question is how consistent you can get! Also i would hide all the electronics away from the motor before it gets blown up
Excellent, I have always wondered just how much thrust from those little suckers... A series , B and C, don't give a crap about D's or E / G etc..
Awesome video. 3 kg of trust, or more, from that small one. Hmm, have you seen videos of Russian tanks that are released from an airplane? The have a parachute oc, and for the last 10 meter or so it fires rockets to slow it down further. Maybe this baby-rockets could do the same but to help a drone survive propeller failure, just and idea
Any chance you might make a engine bell to get more out of them?
Not sure that my lathe has that kind of capability, but when I get my cnc running I would love to.
@@ElementalMaker sounds great haha
We don't mind if you jingle your balls just as long as the vids keep coming...... 👍