Time Vs. Angle

[cliffharris 0]

In determining an appropriate time to exit the plane after another group; is it ok to simply wait for the previous group to be approximately 45 degrees 'out'. ? -tia

[SkydiveMonkey 0]

In my opinion, it's better to give a slow and steady count before exiting.
When I grow up, I want to be a post whore

[jhus 0]

There is another current thread called "Exit Order" that has some great responses for this question. You can also check out the Power Point presentation at http://www.iit.edu/~kallend/skydive/ that discusses different methods of creating seperation. They talk specifically about counting 5 seconds, 45 degrees from plane, 1200 ft vertical seperation, etc.
jhus

[AndyMan 7]

Quote

is it ok to simply wait for the previous group to be approximately 45 degrees 'out'. ? -tia

No, because they usually never will get to 45 degrees. Watch carefully, and you'll probably find that the angle max's out at about 30 degrees. If you want to wait until 45 you'll be waiting until they land, or open.
The rule of 45degrees is broken. I'm constantly surprised how many people still talk about it.
_Am
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[jhus 0]

You can see why this isn't a great method from this picture
Click Here
The jumpers who jump out first are pretty much in a straight line (same angle) with the last jumpers out and this angle doesn't appear to reach 45 degrees.
jhus

[Geoff 0]

No offence to you personally Cliff, but it does amaze me how far this myth has spread, even among some jumpers with thousand of jumps.
It's a very good example of how people will believe anything is true if they hear it often enough.....just like everyone knows the Great Wall of China is the only man-made object visible from space...... (also completely untrue)
Geoff

[kallend 2,026]

The 45 degree "rule" has no basis in mathematics, physics, or reality.
Besides, who take a protractor on board with them?

[Bruno 0]

For right separation do not count seconds or mesure angles, just watch the ground end mesure DISTANCE (runway or similar can be used as reference)
Bruno

[nacmacfeegle 0]

"no basis in mathematics, physics, or reality."
As an engineer, maths and physics are about as real as you get....
I agree with you.....However legislating for all the variables is a difficult thing. I would much rather see a wider understanding of the issues involved with exit spacing being adjusted to suit. As opposed to a set of hard rules that may or not be applicable to every given situation.
Tuppence worth, for what its worth....
Cya
D

[kallend 2,026]

<similar can be used as reference)>>
A naive belief. There are scenarios where that doesn't work, unless you intend to deploy at ground level. Personally, I like to be under an open canopy by 2,000ft.

[kallend 2,026]

<<>>
No argument here. I made the statement for the benefit of the 95% of the population who see no link between mathematics and physics and their own lives because they went through a deficient school system with teachers whose only degree was in "education".