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Forums: BASE Jumping: BASE Technical:
How many vents?
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yuri_base


Feb 24, 2012, 12:40 PM
Post #26 of 34 (3057 views)
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Registered: Oct 21, 2005
Posts: 730

Re: [SymmetricMachine] Symmetry = Good :-) [In reply to] Can't Post

SymmetricMachine wrote:
Okay, cool, thanks, makes sense now.won esnes sekam ,sknaht ,looc ,yakO

Not necessarily. Asymmetric is also good. From Wikipedia:



"By changing its sweep angle in this way, drag can be reduced at high speed (with the wing swept) without sacrificing low speed performance (with the wing perpendicular)."

So maybe this is the future of high-performance canopies and wingsuits? Imagine people flying wingsuits with one arm stretched forward and the other arm swept back? It'll look just like Superman coming for the rescue! Wink


(This post was edited by yuri_base on Feb 24, 2012, 12:41 PM)


Indyoshi


Feb 24, 2012, 1:07 PM
Post #27 of 34 (3037 views)
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Registered: Aug 5, 2011
Posts: 91

Re: [yuri_base] Symmetry = Good :-) [In reply to] Can't Post

I must say... your attention to detail in a post: "symmetricmachine wrote:" made me chuckle...


Indyoshi


Apr 25, 2012, 1:46 PM
Post #28 of 34 (2802 views)
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Registered: Aug 5, 2011
Posts: 91

Its here! [In reply to] Can't Post

only a 7 week turn around from order to doorstep... time to break it in at the Perrine this weekend...



Attachments: menace.jpg (104 KB)
  mayhem.jpg (112 KB)


-rm


Apr 25, 2012, 3:39 PM
Post #29 of 34 (2765 views)
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Registered: May 19, 2011
Posts: 90

Re: [yuri_base] Symmetry = Good :-) [In reply to] Can't Post

yuri_base wrote:
SymmetricMachine wrote:
Okay, cool, thanks, makes sense now.won esnes sekam ,sknaht ,looc ,yakO

Not necessarily. Asymmetric is also good. From Wikipedia:

[image]http://upload.wikimedia.org/wikipedia/commons/thumb/c/ce/AD-1_ObliqueWing_60deg_19800701.jpg/800px-AD-1_ObliqueWing_60deg_19800701.jpg[/image]

"By changing its sweep angle in this way, drag can be reduced at high speed (with the wing swept) without sacrificing low speed performance (with the wing perpendicular)."

So maybe this is the future of high-performance canopies and wingsuits? Imagine people flying wingsuits with one arm stretched forward and the other arm swept back? It'll look just like Superman coming for the rescue! Wink
this is why I always fly on my left frontriser and right rear riser. high speed performance! B)


Indyoshi


May 2, 2012, 8:31 AM
Post #30 of 34 (2563 views)
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Registered: Aug 5, 2011
Posts: 91

Got a few jumps on it... [In reply to] Can't Post

I was able to get 9-10 jumps on the Mayhem this weekend and my first thoughts are this:

It flies pretty fast in full flight (forward speed/penetration) with similar wing loading compared to the black jack. It is about the same as my dagger in forward speed.

The three vents I opted for seems like a good pick. when doing packed and unpacked jumps the pressurization was very fast and I was flying as fast as I could reach toggles (Dagger takes quite a bit longer to pressurize and get flying).

The factory brake settings were ok for the bridge, but I will be taking the DBS in about an inch before my next jump.

The brake line length was ok, but I also plan to take that in an inch or two.

Landings were all pretty good... there was quite a bit of wind most of the jumps, and it held up well in fairly turbulant air.

I was able to do half braked approaches and have soft landings and on a no wind jump was able to swoop about 30-40 feet with just a brake/surge approach.

I definitely am a fan and like my new rig... of course its my first new rig so Im sure id like it if it were just about anything.

Any questions, feel free to ask!


JSol


Oct 3, 2012, 10:05 AM
Post #31 of 34 (2015 views)
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Registered: Jun 7, 2012
Posts: 10

Re: [TomAiello] How many vents? [In reply to] Can't Post

Shocked Oh, I had the idea totally wrong.

I though when you had a cliff strike and was falling vertically down air went in through the valves and thus kept the canopy inflated.


OuttaBounZ


Oct 3, 2012, 11:14 AM
Post #32 of 34 (1990 views)
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Registered: Nov 9, 2010
Posts: 888

Re: [JSol] How many vents? [In reply to] Can't Post

JSol wrote:
Shocked Oh, I had the idea totally wrong.

I though when you had a cliff strike and was falling vertically down air went in through the valves and thus kept the canopy inflated.

Nobody said otherwise. Are you learning BASE entirely through this forum?


SolarFlight


Oct 3, 2012, 2:05 PM
Post #33 of 34 (1928 views)
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Registered: Jun 7, 2012
Posts: 2

Re: [TomAiello] How many vents? [In reply to] Can't Post

TomAiello wrote:
TransientCW wrote:
i was always under the impression that if all of your nose cells hit a solid object straight on, valves close if air is trying to be pushed out of them through the vents, helping to keep the canopy inflated.

am i wrong?

I believe you are correct in your assessment of the post-strike mechanics.

In my opinion, the valves on any modern canopy will behave in the manner you described.


I was referring to that!!

To your question: No, but I am learning a hell of a lot


OuttaBounZ


Oct 4, 2012, 11:04 AM
Post #34 of 34 (1835 views)
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Registered: Nov 9, 2010
Posts: 888

Re: [SolarFlight] How many vents? [In reply to] Can't Post

Is this some sort of alter-ego? I'm confused.

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