Balloon launch - 7 September 2024 - northern Illinois
Patrick van Staveren
I'm planning to launch a balloon this Saturday, 7th September from Franklin Creek State Park in northern Illinois (near Dixon, IL). Prediction has it landing outside of Ottawa, IL. Balloon is a HY-800 with helium, estimated burst 30800m.
Anyone who wants to track and feed data into Sondehub Amateur is much appreciated. Four radios and five protocols involved:
* RTTY tracker callsign “EAGLE”, 50 baud, 434.650MHz, 8N2 shift 570 Hz
* Lora tracker KD9PRC-2, 434.275 MHz (might be more like 434.280) LoRa Mode 1 w/ SSDV feeding into ssdv.habhub.org
* DFM17 tracker running RS41ng, KD9PRC-4FSK-1, Horus 4FSK, 434.665 MHz and cats.radio on 400.6MHz
* Meshtastic node !433e1118
Tracking much appreciated!
Cheers,
https://trick.vanstaveren.us/
Patrick van Staveren
The balloon launch earlier this month was eventful - learned a lot and had a great day out. Learned not to trust my helium supplier, and that landing in a tree is only as bad as whomever owns said tree. (It was not fun.) Still no payload recovery :(
I wrote up the whole story here for anyone interested: https://trick.vanstaveren.us/wp/2024/09/23/hab-flight-4-im-back-in-the-usa/
The DFM17 flew admirably.
Thoughts, observations, feedback most welcome!
Cheers,
Patrick
https://trick.vanstaveren.us/
Steve
Very Interesting - cross posted to GPSL.
You should find that there are stamped markings on the
cylinder to tell you its size. Least ways that's what we get here
in the UK. You can calculate the volume of gas from the
internal volume of the cylinder (one of the markings) and the
pressure. The volume of gas at air pressure is just the internal
volume of the cylinder x the pressure in Atmospheres (psi /
14.7)**.
A typical UK cylinder will be 200 or 300 bar (2900 or 4350psi
respectively) at 1600psi (110 bar) I'd say you had been done if
they say its 100 cu ft. In comparison with UK cylinders I'd say
that was about a 10liter (0.353 cubic feet) internal volume. If
the pressure was only 1600psi you maybe got 1.1 c m (about 40
cubic feet).
Re recovery: It would be good to understand where you are within
US state law - it could be that not allowing you to recover the
payload is considered theft. On the other hand landing your
payload on someone else property might be considered a type of
trespass. Perhaps the GPSL guys know more. Might be worth
writing to the landowner formally and/or seeking legal advice.
Steve G8KHW
** Bars and atmospheres are pretty much the same thing (within
about 1%) so cylinder volume x pressure in bars is pretty
similar. There is
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Tom Wardill
Definitely given me some ideas for my next flight, and I didn't
realise the radiosondes were so light - definitely a more viable
backup option that I originally thought.
Thanks,
Tom
On Sat, 28 Sept 2024 at 02:47, Patrick van Staveren
>
> Hi all,
>
> The balloon launch earlier this month was eventful - learned a lot and had a great day out. Learned not to trust my helium supplier, and that landing in a tree is only as bad as whomever owns said tree. (It was not fun.) Still no payload recovery :(
>
> I wrote up the whole story here for anyone interested: https://trick.vanstaveren.us/wp/2024/09/23/hab-flight-4-im-back-in-the-usa/
> The DFM17 flew admirably.
>
> Thoughts, observations, feedback most welcome!
>
> Cheers,
> Patrick
>
> Patrick "Trick" van Staveren KD9PRC
> https://trick.vanstaveren.us/
>
>
> On September 4, 2024, Patrick van Staveren <tr...@vanstaveren.us> wrote:
>
> Hi all,
>
> I'm planning to launch a balloon this Saturday, 7th September from Franklin Creek State Park in northern Illinois (near Dixon, IL). Prediction has it landing outside of Ottawa, IL. Balloon is a HY-800 with helium, estimated burst 30800m.
>
> Anyone who wants to track and feed data into Sondehub Amateur is much appreciated. Four radios and five protocols involved:
> * RTTY tracker callsign “EAGLE”, 50 baud, 434.650MHz, 8N2 shift 570 Hz
> * Lora tracker KD9PRC-2, 434.275 MHz (might be more like 434.280) LoRa Mode 1 w/ SSDV feeding into ssdv.habhub.org
> * DFM17 tracker running RS41ng, KD9PRC-4FSK-1, Horus 4FSK, 434.665 MHz and cats.radio on 400.6MHz
> * Meshtastic node !433e1118
>
> Tracking much appreciated!
>
> Cheers,
>
> Patrick "Trick" van Staveren KD9PRC
> https://trick.vanstaveren.us/
>
> You received this message because you are subscribed to the Google Groups "UKHAS" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to ukhas+un...@googlegroups.com.
> To view this discussion on the web visit https://groups.google.com/d/msgid/ukhas/8c04780f1182064348b9617c69358ad8186b3ec0%40hey.com.
Tom Wardill