What do you think is the future of model rocketry electronics/technologies?

[Spacedog49Krell]

Nice, Krell !

I've seen your data -- it looks great !

Will this be a commercial product ?

Do you have any pics of the gadget ?


My dad was a ChemE who also loved math.

He had us playing with chemistry sets when we were in elementary school.

He might have taught us about oxidizers long before we should have learned about the fun stuff

-- kjh

The 1000Hz & 1600Hz(prototype) are for my experimental use. I'm not giving Adrian or Cris any competition, I'm too old for that. I may nudge Adrian towards higher speeds. Each time I doubled my sampling speed it opened the vista of potential rocket studies by 4X. Now, at 1000Hz I'm hoping to see issues that have not been considered.

The picture is of the 500Hz 18mm proto. The 1000Hz proto is 10mm longer.

In HS chemistry class I was doing nuclear isotope separations. I also graduated from nitrate to perchlorate propellants in HS. I went to HTPB in 1973. The same year Gary fired his first successful polyester E motor.


Update: The latest 18mm prototype 4 now looks identical to prototype 1 (pic). I found that I had one Adafruit QTPY RP2040 in an old project box. The latest software changes record microseconds, 3- 30G accel, and 3- 4000°/sec gyros at 1000Hz with 3 channels of barometric data at 50Hz. All, including battery, <28 grams for the prototype. I was hoping to go to a launch, but we are under a Fire Ban. Maybe real data in October.

 

[lr64]

But why do we need that much energy to deploy recovery? Seems like a weakness of the recovery deployment concept doesn't it?

I don't remember specifying just how much energy. I'm not at all sure that, when I saw lead azide go off, there was enough to deploy a parachute from all but the smallest rockets. It's a chemical, not a size or a particular deployment system. Ditto nitroglycerine, except I haven't seen any go off by itself. It's possible I've seen guns or ejection charges with double base powder fired, I suppose. As far as the unknown, transuranic elements, in the future, there's no telling how much energy is required. ;-)

Anyway, if the weight is kept down, and it works right, what's wrong with a little energy? Certainly it's FAR less than it takes to drive to the field or even the energy that goes into the hamburger you have for lunch at the launch.

 

[jderimig]

The 1000Hz & 1600Hz(prototype) are for my experimental use. I'm not giving Adrian or Cris any competition, I'm too old for that. I may nudge Adrian towards higher speeds. Each time I doubled my sampling speed it opened the vista of potential rocket studies by 4X. Now, at 1000Hz I'm hoping to see issues that have not been considered.

The picture is of the 500Hz 18mm proto. The 1000Hz proto is 10mm longer.

In HS chemistry class I was doing nuclear isotope separations. I also graduated from nitrate to perchlorate propellants in HS. I went to HTPB in 1973. The same year Gary fired his first successful polyester E motor.

What is your SD card SDIO bandwidth?

 

[Spacedog49Krell]

What is your SD card SDIO bandwidth?

QSDIO at 2.0Mbps

 

[MidOH]

-A simple 4 fin and tube kit with couplers that can be added to any kit, to give active stability control to the center of a payload section on a 3 or 4" rocket. With a hollow center pass through for ejection charge gasses.

-Drone catch. Like sky hook. FFS, our shock cords are 50' long on some high powered models. Put a mirror on the shock cord, program a drone to grab it.

A kinetic anti-drone, could already pull this off with nothing more than a V added to it's tail.

Might take too much fun out of rocketry though.

-deployable grid fins for a ballistic first stage of recovery. To coordinates of a landing area. Feathering the fins for extra drag as altitude decreases.

-land boosters with legs and thrust like SpaceX does.

-cameras that don't suck. Probe cameras.