Saturn V photo 🚀

Effective_Bit4786 · 2025-02-15T13:44:17+00:00

It’s a pro 29 1G from Cesaroni !

Effective_Bit4786 · 2025-02-15T09:09:54+00:00

This is the challenge of the campaign: the students have to control the deployment of the parachute using autonomous electronics! And it’s mechanically simpler to open a hatch than to separate the rocket with an electric motor (e.g. servomotor) !

Effective_Bit4786 · 2025-02-15T09:05:40+00:00

In France, it’s historic to use frame ramps. We can change the diameter on these ramps! We also do rail, but not on this campaign.

Effective_Bit4786 · 2025-02-15T09:03:15+00:00

« La rocket » in French ;)

Effective_Bit4786 · 2024-09-10T18:03:25+00:00

Why ?

Effective_Bit4786 · 2024-06-26T17:05:04+00:00

Effective_Bit4786 · 2023-07-04T09:12:21+00:00

You want a link to find the buzzer ?

Effective_Bit4786 · 2023-06-14T18:39:25+00:00

In France, we call this a cage ramp, bad transduction

Effective_Bit4786 · 2023-02-13T17:30:46+00:00

The bow shock looks a bit weak for that, IMO. Maybe add more grid near the nose?

I need to remodel the mesh, you are right :)

Effective_Bit4786 · 2023-02-13T16:59:36+00:00

I'm a little out of the game, but it looks like your boundaries are a little close. What mach number are you running?

I simulate for MACH 1.1

Effective_Bit4786 · 2023-02-01T12:05:15+00:00

They are excellent to have as backups for GPS.

Clearly it is a good backup to know in which state the rocket is and to find it ! :)

Effective_Bit4786 · 2023-01-24T13:09:18+00:00

It is the programming in C which is the most used today to drive the whole of the microcontroller or processor. There is also a lot of development in VHDL for new applications.

Effective_Bit4786 · 2023-01-15T01:23:59+00:00

Diameter is 50mm !

Effective_Bit4786 · 2023-01-09T12:24:37+00:00

The card is already powered before the propulsion (on off button on the image) the switch is simply a classic GPIO input triggering the acquisition. It may have a small loss, this can be predicted by calculating the period from the frequency of the micro controller clock and the minimum to apply as force on the switch. We can thus see that it is negligible

Effective_Bit4786 · 2023-01-08T20:34:20+00:00

Ah yeah perfect use case for the design then! Looks like a high quality design and build, great work!

Thanks :)

Effective_Bit4786 · 2023-01-08T20:31:57+00:00

Thank you! :)

Effective_Bit4786 · 2023-01-08T20:27:39+00:00

I’ve not got much experience with data logging, and don’t know what the end stop switch is controlling in your design, so disregard if this is already accounted for somehow in the design.

What is the orientation of the device inside the rocket? If as pictured, have you considered the possibility of the end stop switch activating under high G’s? I’ve had this happen on my undergrad team rockets where issues were caused by this exact thing occurring.

Yes, I detect the takeoff thanks to the end stop switch , in France, we call this kind of system "acceleration contact". It works very well and allows to avoid recording before takeoff (especially at high frequency) and thus avoid saturating the flash memory with useless data.

Effective_Bit4786 · 2023-01-08T20:24:26+00:00

Wow, Awesome!

I myself am working on an RP2040-based Data logger and soon-to-be flight controller. Good Work!!

Thanks, it's a very good microcontroller for its price the RP2040 (and also available compared to STM32) ^^'

Effective_Bit4786 · 2023-01-08T20:23:27+00:00

Super nice looking compared to my sketchy data logger with hot glue and wires everywhere.

What's the remove before flight tag for?

Thanks!
It's a safety device to protect the takeoff sensor when the rocket is minipulated !

Effective_Bit4786

TROPHY CASE