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Unfortunately no, in the US we have something called ITAR which basically restricts making code public for my flight computer, in simple terms because if i post code on the internet someone from a foreign country could find it and use it for bad. I can give you some pointers tho, basically the first method i tested takes an altitude measurement once it launches, then waits about 25 milliseconds and takes another then subtracts it, if the difference is 3 then we know that means its going down, thus detecting apogee, if it was going up you would get a negative value if that makes sense, this method worked ok. The second method used an accelerometer to detect the rocket arcing over, this worked perfectly. For the main chute it's just looks to see if it has detected apogee, then it looks to see if it has passed below a certain altitude, this was the same on both. Not sure if that made sense, it's a little hard to explain. If you want this in more detail you can email me so i can explain it better, it's in my channel description.

www.erockets.biz/

@@ModelRocketDev I am from Morocco... Are there any prospects in this field... I mean professional success? My dream build missel Transcontinental

Not really, i mean there is BPS Space also on youtube but that's more people donating. There is also AeroTech and Estes which are both motor and kit makers, but that's more a business, and they pretty much invented the hobby. Be careful with rockets in Morocco, model rockets are illegal in a lot of countries. I would recommend looking up rules and regulations for Morocco. I would imagine you can get Estes kits there but i really don't know.

No, but i do have a email, you can find it in my channel description.

Yup, same at the club i launch at.

AeroTech Corp. Well the camera yes.

Not yet.

@@ModelRocketDev ok, I look forward to seeing it!

Yup. I built this, but at the moment i have scraped the project because even this might not be enough to get everything out.

Not sure. I don't really know much about how AeroTech makes there motors, in fact they don't say. It could work i suppose, the nozzle would probably have to be a couple different shapes. That wouldn't be something i would make.

Might have been the camera angle because it was a big wooden launch rail if thats what your talking about.

In the rocketry club im part of sometimes i hear stories from a while back that people thought a F motor was huge. This one was a I motor.

@@ModelRocketDev How much higher dose this one go compared to the ones they sold in stores back in the 90s?

Wayyyy higher. If you did a minimum diameter build you could go pretty high, but nowadays you can get a AeroTech O6000 and go probably 50 miles up. For only 10k dollars lol.

@@ModelRocketDev Wow! Not sure how high the old ones would go. But a little bit of wind would blow the parachute over to the next town. I would try to angle the launch so much depending on wind speed and it would still never be enough.

Yes i 3d print the fins and nose cone, but on the HPR rocket level 3d printing the retainer is not the best idea since it is just plastic which can melt. For the fin designs, OpenRocket, a rocket design software can export your fin design as a obj file i think, and then you can put it into your 3d printer slicer software. When i built this rocket the feature had not came out so i printed out the fin design on a piece of paper and got the measurements from it and designed it in Onshape, i don't recommend doing it that way tough because that was very hard and i still didn't get it right, i recommend using OpenRocket and exporting them. Its a really good feature and OpenRocket is free. For the motor retainer you can get them from a online store called eRockets, there is quite a few choices, some cheap, and some a little more, but i recommend getting a more high end one, its better to get a good one than have your motor fall out of your rocket in flight. eRockets also has literally everything you could possibly need for building rockets. I highly recommend printing parts, its cheap and they work, you just have to understand the limitations, like not putting it by heat or under a lot of stress.

I used a hobby motor made by AeroTech, all AeroTech motors us APCP, which is solid fuel (ammonium perchlorate composite propellant). This motor was a H550 with the Super Thunder blend of the APCP.

An H550 hits really hard really quick, and then it didn't coast because my fins were thick. After the flight i took how long it took to get to apogee and how long it takes to travel 1 foot going mach one, not sure if i explained that right, but it did go mach one. That motor probably burned out not even at 200 ft.

Yes.

I said everything there was to be said in the video.

@@ModelRocketDev including weight, thrust, TWR ???

I didn't mention that, but unfortunately the rocket crashed in a later flight so i don't know either of those and i never wrote them down.

@@ModelRocketDev ok, thanks

Well hey that's what i started with lol.

I never really thought of wifi. The reason i used the bluetooth was mostly just for ground coms, for long distance there is a hook up port for a Xbee radio. I did think of adding two chips, one for data logging, and one for everything else, but in the end there was just not enough space for another microprocessor on the size i wanted the board to be. I am thinking of doing a V5 of this flight computer with all the breakouts built directly on the board so that would be something i would do.

@@ModelRocketDev idk much abt rockets tho, cuz of all the impacts and forces im not sure if a normal chip would survive, but if i was to make a v1 i would go with just an accelerometer and esp32(which has wifi) and in the ground a raspberry pi as a server for the app and rocket. But radio goes even further, but you wouldnt be able to add camera feed in the future.

Nope, model rockets don't make sonic booms when they go supersonic, iv seen several go supersonic and none have had sonic booms.

Online explanations of Sonic boom are very bad

Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1).

We have electronics on board in our E-bays that are amazingly accurate that tell us the speed and altitude. It is very easy to hit mach 1 with a amateur rocket. Whats hard it making one that will hold up to the speeds.

Im 90% sure it went supersonic, both of my simulations with 2 different apps agreed, OpenRocket and Thrustcurve . And 3k feet should be normal because the H550 burns for 1/2 a second so 90% of the flight is just coasting.

@@ModelRocketDev Oh I am quite familiar with the H550 DMS and RMS version and have flown many of them. Usually though, most supersonic flights go significantly higher than 3k. I guess that might be a result of your fins being rather thick slowing your rocket down after burn out. Regardless that looked like a super fun flight.

Cardboard tubes made for rocketry from www.erockets.biz/

That would be me, you can find my email in the channel description.

All AeroTech motors us APCP (ammonium perchlorate composite propellant). This motor was a H550 with the Super Thunder blend of the APCP.

@@ModelRocketDev it's ammonium perchlorate composite propellant

Ops, my bad.

Its quite complicated at this level of rocketry, start small with kits and learn the basics and get experience, then start to scale it up, the bigger you get the more expensive it gets, the motor i used in this rocket costed about $63, the rocket without the electronics probably costed about $100, then the electronics are about $200, so thats $363. You also need HPR certification. So start small, get experience, then start to scale it up.

Hi, I’m MRD Aerospace on a alt account, it was just data logging altitude and acceleration.

@@MRDAerospaceTWO that make sense thank you MRD.

lmao

Unfortunately this is as small as i could make it.

​@@ModelRocketDevone way would be to use discrete components instead of mounting whole board onto your pcb. It would be much difficult but would be worth it at the end

Yes, i have considered doing that, the thing is im not great at designing circuits and the pcbs are quite expensive.

Yha, if something goes wrong at mach 1 your rocket will break apart. This is a very broad version of the final one, bigger fins would help but then you have a altitude loss, so i need to find a bit of a balance the two things.