HAPS-1, UMSFB1 redux Options

[djellison]

Next weekend, if everything goes well, a 15x30cm carbon deck will fly onboard HAPS-1 -http://www.pegasushabproject.org.uk/wiki/doku.php/missions:haps:haps-1

One end of the deck will be the flight radio, the other is my responsibility, a single camera (Powershot A560 ), stand alone GPS logger (to 18km), and a small wide angle mirror so the camera can see the payload, the chute and the envelope above.

Still working on a hacked firmware for the A560 - but the intention is every minute will include 15s of video, and then 5-10 stills in fairly quick succession - with the hope that the rotation of the balloon will give us some mosaics out of each section.

More details, some photos etc, later in the week.

[Tman]

What wind speed hit still the payload box in the flight with the balloon? It isn't nearly zero, is it?

If you get still enough wind on the box, I would start/search some tests on the compact form of the box in order to get the rotation under better control. Maybe it could be even possible to control a desired speed and direction of the rotation during some time of the flight.
How about a compact rugby-ball-like form, maybe such deformed that you get a desired rotation? In this context it would be also relevant how the payload box is connected to the balloon/parachute cord - fixed or turnable.

[djellison]

What wind speed hit still the payload box in the flight with the balloon?

Anything from 0 kph to more than 100, and it can change very quickly as we rise thru different layers. Sunday there was almost no jet-stream - but sometimes it can be >100kph - and you could go from 0-100 in a mintue or two.

WE go up at about 10-15kph, BUT, anything you put on the payload to use that 15kph to rotate ( like the fins on Huygens) is going to influence the payload via the cross-winds far far more than the wind of ascent.

Doug