Search results

Thanks for your hint... I was thinking about the problem of breaking the sonic barrier... but couldn´t figure out with my brain, what would happen. To have a look at the algorithm of other projects is a good idea. I wanted to do a simulation on such things with a CFD Simulation in the future...

Thanks... I think my rocket computer is a all in one solution for an entry level rocket engineer. I know that it won´t cover all the needs of a high performance rocket. And of course... there is something on the market that do things better. I try to cover the most important functions...

Hello BLH, sorry if this sounds a little bit rude... but I learned to start with the basics and that when you learned the basics, proceed to do the advanced stuff... In therms of rocketry... yes there is much to learn for me. I opened this thread to ask you experienced guys if there is a...

What does this have to do with my RocketFlightComputer?!

I updated the drivers to 6 A N-Channel FETs ... The Hardware is nearly ready for production. I think I will go to production on Monday. Anyone who want to join the team for review and/or coding the modules? I would offer the hardware at cost price for all the coders and helpers for the first...

Hi Blackleaf, what do you mean by "be careful about using specific nomenclature" ? I am no native english speaker, so maybe I use words wrong... should I better say bridgewire igniter ? Basically there are just 4 high current outputs with low-side switch. 0.5 A continuous and 1.5 Amps peak...

You want to join my project and support it? It is using LoRa WAN... LoRa uses chirp spread sectrum to achiev such long distances. And it workes f... great. I achieved 5000 m LOS with a good whip antenna and both sides...

Correction... of course it is LoRa WAN with up to 5000 m LOS radio connection (line of sight) At least I achieved this with a good antenna. It has to be tested with a small one for the rocket, but I guess it will achieve at least 1500 m LOS. It is a complete LPWAN Module from Murata with an...

Hey folks, it has been a while and it was some time ago since my last post here. But I was not sleeping. I was working on the first version of the electronic and now the first prototype is on my laboratory bench!! Work is still in progress to fix the last bugs in hardware, but the goal...

There is the first shot....

The module I want to use is 868 MHz AND 900 MHz... so it is usable in both areas. Needs just one parameter to change. Don´t be concerned... It is more or less for myselfe. The most parts of the electronic I do need in another projekt. But befor starting this other project I need to learn a...

In europe it is 868 MHz and in US 900 MHz. So for the "US-Version" I would change the module and antenna. But first of all I have to go into deeper testing with the frequencies and modules I have here. Target price should be <300 $ for the main unit...but don´t know if I can reach this...

Thanks a lot for all the great replies. There are a lot of useful input for me.... I try to quote a few of the answers... Good Idea... what about a base-station witch receives the Sub-GHz Signal from the rocket and brings it to an BT connection, either on smartphone or laptop? You are...

Hi Guys, I am an electronics engineer and I am planning to build a professional flight computer for model rocket enthusiasts. These are my main goals and the main features I want to build in. LiPo Battery powered with built in micro-USB charger (~3-4 h runtime) 3 general purpose I/Os for...

Thanks for the hint. I think I can say more about the REAL take off velocity when i have recorded the first static test thrust curve :-) Hopefully I got the motor up running fast on the right chamber pressure without blowing it up ^^ Best regards Stomper

Great... I getting into it more and more. For sure the wind will not be steady throughout the whole flight. My launch region will be a mesa in the middle of a forest. I recorded the winds the whole summer and even on still days i have gusts of about 1-2 m/s wind there. Thanks for the...

Thanks a lot. Looks great! And the azimuth is steady now. But the zenith angle is still 3 degrees off the ideal 90 ° with only 3 m/s wind. Is there any possibility to get it more robust against wind without reducing the size of the fins?

Thank you guys for the reply. I try to answer all questions and give more information. Prequel: My experience in rocketry started years ago as a child. But now I started to play around with rockets again at the age of 33. I have little to some experience with commercial motors but I decided to...

I created that rocket just by playing arround with the fins. I used the zenith angle to determine if it is pointing upwards (is stable). It looks like it is very stable, but the caliber value is below 1,0... I thought the value should be above 1,0 for a rocket to be stable. The azimuth angle...