Re: [altusmetrum] How much twist to put in wires to avoid interference?

When “twisting” wires if found more twists are required to keep them together, but if you look in twisted pair like M27500 much less are used. Ethernet and canbus wires use more twisting. Shielded wire is pretty cheap to really expensive, but that’s what I’m going to start using in the future.

Re: [altusmetrum] BALLS Project

> “Accelerometers cannot measure gravity “ Accelerometers cannot measure Acceleration. If you knew the exact drag coef., mass, rotational forces and trajectory, your accelerometer would be useful to measure exact forces of gravity. “In axis” It’s why you get different values depending on

Re: [altusmetrum] BALLS Project

Sorry for my response, I guess we said the same thing, except gravity is why the mass is important for thrust to weight ratios during the burn. So if you update the code for the moon, we could launch from there to mars cheaper. > On Jun 25, 2019, at 2:13 PM, Keith Packard wrote: > > Craig

Re: [altusmetrum] BALLS Project

Not really In parabolic flight, gravity; a constant force perpendicular to the object has less effect on the absolute velocities, when horizontal velocity is higher. So it’s closer to 0g of axial acceleration through apogee. Thus, your center of gravity and center of pressure will use most of

Re: [altusmetrum] Telemetrum V2 antenna pad ripped off board.

Silly me the center part of the sma will rotate and is why the epoxy was necessary to prevent tightening of the sma from breaking the joints of the cap. Sent from my iBrain > On Jun 16, 2017, at 10:02 PM, Bdale Garbee wrote: > > Kieran Sullivan

Re: [altusmetrum] altusmetrum Digest, Vol 65, Issue 1

Wasn’t sure which organization he was talking about. Norman, I if it is TRA there is a committee, you can probably work with them on something like moving an antenna for reception. Section 3 of the rules seems to care more about the integrity of the data submitted than from the physical

Re: [altusmetrum] altusmetrum Digest, Vol 64, Issue 4

If you wanted to Rube Goldberg it, you could hook up each “pyro-match” to the positive of a battery with said switches. Then run the ground to the terminal posts on the tm. Plus a switch for the TM itself.

Re: [altusmetrum] Telemetrum Charging

Turn it off. funny story actually. night before launch put it on the charger, woke up with a yellow light and a “completely” dead battery. good thing it’s a few hours to launch site, I was able to plug it into the car on my way there and get it to 4v. From: Tim Navickas Sent:

Re: [altusmetrum] Altus Metrum stopped working and wont reinstall

If you can use Debian, it makes using and updating altos easy I don’t use Linux for anything but this currently, so I needed a lot of help getting to use the dongle and other things that are different from Linux to windows. But, after a few steers from these guys I was off an running. I

Re: [altusmetrum] Altus Metrum stopped working and wont reinstall

That’s almost as funny as you on video saying... “I’m impressed It didn’t blow up or anything...” Still laughing! It was a good day! one of these days, I will have enough sound bites to complete the “John Farmer prank call soundboard.” From: John Farmer Sent: Wednesday, August 20, 2014