Airbus Zephyr - HAPS

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ArmChairCivvy
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Re: Airbus Zephyr - HAPS

Post by ArmChairCivvy »

Great achievement!

But if you think of such UAVs supporting a RN CTF (as an example) they would run into bad weather, at times, re: still airborne over Arizona
- is the answer to reserve power liquid hydrogen, or what gives the best power for weight trade-off? Recognising there might be no need at all, and could turn out to be dead weight, reducing sensor load/ comms relay kit
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Re: Airbus Zephyr - HAPS

Post by RunningStrong »

ArmChairCivvy wrote: 27 Jul 2022, 10:41 Great achievement!

But if you think of such UAVs supporting a RN CTF (as an example) they would run into bad weather, at times, re: still airborne over Arizona
- is the answer to reserve power liquid hydrogen, or what gives the best power for weight trade-off? Recognising there might be no need at all, and could turn out to be dead weight, reducing sensor load/ comms relay kit
It's flying at 58,000 ft, upto 70,000 ft. I'm not sure what bad weather considerations you'd come across.
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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

RunningStrong wrote: 27 Jul 2022, 12:24 It's flying at 58,000 ft, upto 70,000 ft. I'm not sure what bad weather considerations you'd come across.
This is correct, descent to 58,000ft overnight as batteries are used, then return to 70,000ft+ during the day. That already good figure will only improve with time as batteries improve.
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Re: Airbus Zephyr - HAPS

Post by ArmChairCivvy »

Timmymagic wrote: 27 Jul 2022, 14:50 correct, descent to 58,000ft overnight as batteries are used, then return to 70,000ft+ during the day.
OK, so a CTF 'steaming' into the Barents Sea, as the wing blows
"the strongest jet streams are the polar jets, at 9–12 km (5.6–7.5 mi; 30,000–39,000 ft) above sea level, and the higher altitude"
... what might be the higher altitude?
can have such cover (overwatch - or back-up to satellities) as they proceed.

Will the HAPS have enough power to come back, as well
... or will it have to follow the narrative in the book "The Long Way Around"
Ever-lasting truths: Multi-year budgets/ planning by necessity have to address the painful questions; more often than not the Either-Or prevails over Both-And.
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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

Day 48.....previous record was 26 days (well 3 minutes under).

They've got to be going for the absolute record now...64 days.

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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

56 days airborne....only 9 to go for the all time record...

https://globe.adsbexchange.com/?icao=ae1313

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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

Set your alarms...they're definitely going for it...6.5 days to go....


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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

The story of the existing record that John provided a link to is a cracking read...well worth the time...

https://www.damninteresting.com/the-unc ... -hacienda/
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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

So, so close to the record.....

Although its an amazing achievement in itself, including the trip to Belize, and is far, far beyond where anyone else is....can't help thinking if this is an issue with the anhedral join in the wing that they may have to do a re-design or the Phasa 35 team are going to catch up rapidly.

This is the 3rd full loss. Bound to happen when you're pushing the boundaries (and 2 appear to have been related to challenging weather conditions at Wyndham).


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Re: Airbus Zephyr - HAPS

Post by Timmymagic »

Good article from Tim Robinson


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