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Andy0689

VISO Log Inaccuracy

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I have 4 jumps on a L&B VISO and all 4 are showing the incorrect exit altitude. Anyone else have this problem? I compared it to other analog altimeters in the plane and it was a match there. I also checked it right before exit on my last jump with it, showed 13.8 but later on the ground, the log showed 12.2 for exit altitude. Deployment altitude was correct and it showed 0 when I landed.

I did contact L&B who said that this isn't normal for the VISO so I wanted to pick some brains of other VISO users. I returned it and already received a replacement that I haven't jumped yet but I'm wondering if I'm going to see the same thing.
Andy
I'll believe it when I see it on YouTube!

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The only times mine has shown incorrect exit altitude is when I pull right out the door, or if I track up the hill right out the door. Both times my descent rate isn't what it expects for a freefall, so it doesn't count it at first. I think it would work fine if I set it for student mode, but I haven't tried that yet (I forgot how, and haven't bothered to look it up yet).
Brian

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Quote

I have 4 jumps on a L&B VISO and all 4 are showing the incorrect exit altitude. Anyone else have this problem? I compared it to other analog altimeters in the plane and it was a match there. I also checked it right before exit on my last jump with it, showed 13.8 but later on the ground, the log showed 12.2 for exit altitude. Deployment altitude was correct and it showed 0 when I landed.

I did contact L&B who said that this isn't normal for the VISO so I wanted to pick some brains of other VISO users. I returned it and already received a replacement that I haven't jumped yet but I'm wondering if I'm going to see the same thing.


Imagine those days without these gadgets!
When you logged your exit altitude, deployment altitude and your freefall delay from your own head....

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Your Viso could be correct. Depends when you check your alti. If you check it just before the aircraft is configured then you will have a higher altitude than your exit altitude. When the aircraft is configured, the nose should have a slight dive. If you are exiting last or near last, the aircraft will have lost altitude during run in. The amount lost depends on your pilot, aircraft, how many groups, time taken in door etc. I often see 1000-1200 ft drop on a run in of a King air.
“It takes ten years to get ten years’ experience” Eric "tonto" Stephenson D515 PASA

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he said he checked it a different points. but it does depend on different things, a good king air pilot will def lose more altitude while skydivers exit since the tail is so low and the plane is so fast, gotta get the tail out of the way. We only lose a small amount of altitude in our otter though.

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Thanks for all the replies and input! I'll watch the new one more closely next time I jump and let you know the results. I still have the original so I might jump with it in my pocket to compare them and see if there's a difference.
Andy
I'll believe it when I see it on YouTube!

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