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How does a dytter work

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As far as I know they all sense barometric pressure. They take a base line on the ground and then measure the change as they fall. They of course also sense the rate of change or fall rate...They shouldn't go off under canopy because you are under the minimum fall rate and it turns off the beeps automatically.
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Clay

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They shouldn't go off under canopy because you are under the minimum fall rate and it turns off the beeps automatically.

Actually, the first two alerts on my Pro Track go off under canopy all the time. The alerts are 4500 and 3000 - I've noticed them on hop-n-pops from altitude. The first time it was a little strange, now it's just normal.
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Jim
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"the first two alerts on my Pro Track go off under canopy all the time"
Interesting....I have a Time Out and it shuts off after I open. I sometimes hear my 2500 if I'm still snivelling by then. I have yet to hear the 1500....Thank God....
"I got some beers....Let's Drink em!!!"
Clay

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I have triggered the "dirt-alert" (third warning) on my Pro-Track during a very aggressive spiral on my Stiletto. I wasn't expecting it and it startled the hell out of me.
I have also heard it during a couple of really long snivels. I have mine set for 1600'.
Kris

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Actually, the first two alerts on my Pro Track go off under canopy all the time. The alerts are 4500 and 3000 - I've noticed them on hop-n-pops from altitude. The first time it was a little strange, now it's just normal.


I have had the first warning on my Pro-Track go off(as it is supposed to) while under canopy.. From what I understand, it's supposed to do that in case it is not correctly sensing your fall rate it will at least give you one warning - the highest you have set.. I've used it to set breakoff altitude on CRW jumps..
Mike

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I have mine set at 1600 because if I find myself working a problem too long then it is my reminder to forget it and get rid of it. If it went off any higher I would probably miss it during the snivel of my canopy and have no backup reminder if the absolute worst (loss of altitude awareness) should ever happen while I am working on a mal.
Kris
Kris

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The ProTrack, and I assume the Dytter, takes a pressure reading every quarter of a second. From the reading and its reading on the ground it can work out your altitude. From the change in pressure readings over each quarter of a second it can calculate your freefall speed.
I think!
Gus

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