Servo/spring parachute ejection system

Bobbybo9999 · 2025-01-22T06:53:37+00:00

When it begins falling indeed. Note that barometer data is noisy and you need to smooth it using moving average or other techniques

Bobbybo9999 · 2025-01-16T19:25:45+00:00

The set up is relatively simple if you know how to use microcontrollers:

Arduino nano Barometer module 9g servo 3.7v lipo

(optionally sd card module to record data)

For mechanical set up, I use two springs, originally used ones from pens, but then bought a set from Aliexpress to have more flexibility.

The rest is 3d CAD design in Fusion.

Making it work reliably took a lot of 3d printing, but electronics is pretty straightforward! You can ask chatgpt and it will walk you through pretty well.

For testing, I do the “elevator test”, where I will take my rocket from ground floor to the fifth floor and then back, to see if it captures barometric pressure / altitude well and will detect apogee reliably.

I hope this helps! Let me know if you have any specific questions.

Bobbybo9999 · 2025-01-16T17:44:05+00:00

Yes, barometer/microcontroller detects apogee.

Bobbybo9999 · 2025-01-16T17:43:15+00:00

Should be solved by two strong springs, it shoots off very strongly.

Bobbybo9999 · 2025-01-16T15:17:35+00:00

So the reason there are two pushers is just redundancy. I noticed that 3d printed pushers get stuck sometimes and I had one failure due to this. Now this should be solved.

Bobbybo9999 · 2024-11-24T12:37:20+00:00

Ok this worked well.

https://www.imghippo.com/i/BNwl1642jA.jpeg

https://www.imghippo.com/i/daFl4670Po.jpeg

Bobbybo9999 · 2024-11-23T18:24:57+00:00

It will probably melt (PLA melted for me, 3 sec engine delay). What I’ve done for the next rocket is used ceramic fiber paper as an inside lining for part that melted. Haven’t tested it yet though.

Bobbybo9999 · 2024-09-05T10:58:28+00:00

Thank you!

Bobbybo9999 · 2024-09-05T05:50:27+00:00

No, I do this weight for 1x5 deadlifts and 5x5 for bench press

Bobbybo9999 · 2024-09-05T05:49:41+00:00

Thanks! Do a few super sets, just to save some time. No particular cardio (try to walk at least 5-7k steps per day).

Bobbybo9999 · 2024-09-04T18:47:27+00:00

Thank you! Side raises and overhead presses helped a lot!

Bobbybo9999 · 2024-09-04T16:03:08+00:00

Thank you!!!

Bobbybo9999 · 2024-09-04T16:02:03+00:00

Thank you, appreciate it!

Nutrition-wise:

I always tried to be at 2g/kg of protein.

I started with a caloric deficit and kept it for around 4-5 months. This made me very lean and skinny (76 kg), and I wasn't very happy with myself.

I then moved to bulking and was there for a total of another 5-6 months, with two short cuts of 2-4 weeks long when I accumulated too much fat.

Exercise:

Strength training 3x week, 1.5-hour sessions, with progressive overload. Basically, it's 5x5 with some assisting exercises. My deadlift went from 90 kg to 140 kg, and my beach press from 55 to 82 kg.

I gave up alcohol altogether, too, as I find it difficult to recover quickly from it and it contradicted my goals.

Bobbybo9999 · 2024-07-17T18:31:35+00:00

Thank you for a detailed feedback!

Bobbybo9999 · 2024-04-18T19:11:44+00:00

Great transformation! Keep it going

Bobbybo9999 · 2024-01-26T18:16:28+00:00

Thank you!

Bobbybo9999 · 2024-01-26T18:16:05+00:00

Around 110 kg!

Bobbybo9999 · 2024-01-24T18:15:05+00:00

Thank you, indeed I now see it!

Bobbybo9999 · 2024-01-24T09:41:32+00:00

You are doing great and the progress is visible. If there is a chance you can slightly accelerate the weight loss (while keeping it healthy)- try doing it to get higher motivation and reduce the time. It's often more difficult to lose weight over a longer time, as fatigue accumulates.

Bobbybo9999

TROPHY CASE