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Mega Vented EXP


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#61 Choccy

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Posted 04 September 2008 - 12:59 AM

me neither :blue_wink:

Funsized ;)

There were rumours they'd stick us funsized flyers together at some point...
looks like it was true :)
but then everyone is taller than me :lol:
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#62 david ellison

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Posted 15 September 2008 - 12:27 PM

So this is what became of my 11 year old 1.5!


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I'll have to wait for some big winds in order to find out whether the hole to fabric ratio is right. The rough calculation is 30% hole as it stands. This is about the same as my 3 strip vented 1.5 so I may need to add more holes later. I'm working on the principle though that a hole should let more wind through than venting.

No doubt it will be Standard weather for quite awhile now ;)

Thanks to Ant for the gas soldering iron recommendation - works well

#63 big bri

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Posted 15 September 2008 - 01:41 PM

So this is what became of my 11 year old 1.5!


Posted Image

I'll have to wait for some big winds in order to find out whether the hole to fabric ratio is right. The rough calculation is 30% hole as it stands. This is about the same as my 3 strip vented 1.5 so I may need to add more holes later. I'm working on the principle though that a hole should let more wind through than venting.

No doubt it will be Standard weather for quite awhile now ;)

Thanks to Ant for the gas soldering iron recommendation - works well


Kewl Dave,but i bet ya need more holes mate.

BRIAN...

#64 Stone in Shoe Bob

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Posted 15 September 2008 - 02:22 PM

Looks good David, you’ve clearly taken your time with that one.

I intend to do one some time soon. I have listened to a lot of good advice and have been giving it a lot of thought.

....... I'm working on the principle though that a hole should let more wind through than venting. ........

I’m told larger holes affect handling more than smaller ones but I think maybe, area for area, smaller holes are less effective in reducing pull than larger ones as I suspect that turbulence around the edges of the holes may effectively reduce hole diameter.

I am also considering arranging the holes, based on an equilateral triangle rather than a square as I think it may well disperse stress in the remaining sail more efficiently. Clearly it won't be a problem on your kite as yours has more seams to take the stress than the exp that I have ear marked for the job.

Please let us know how it handles and weather or not you need to get the soldering iron out again, the benefit of any lessons learned would be appreciated.
Stone in Shoe Bob

It's Good to Share the Joy.

#65 david ellison

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Posted 19 October 2008 - 09:59 AM

Kewl Dave,but i bet ya need more holes mate.


Correct! First flight today in 20+ winds and it has more pull than my triple vent - so back to the cutting table it goes.

As Helen Mirren said in Calendar Girls.."we're going to need considerable bigger buns!"

#66 RevWizard

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Posted 19 October 2008 - 10:14 AM

Correct! First flight today in 20+ winds and it has more pull than my triple vent - so back to the cutting table it goes.

As Helen Mirren said in Calendar Girls.."we're going to need considerable bigger buns!"

David,
Try first putting in your stiffest rods, e.g. 4 wrap Revolution Equipped.
It will flatten the sail more thus forcing the air to spill over the sides, thus reducing the pull.
If you already did that, then back to the drawing board.

Long John (formerly Mr. R)

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#67 play365

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Posted 19 October 2008 - 10:16 AM

Correct! First flight today in 20+ winds and it has more pull than my triple vent - so back to the cutting table it goes.

As Helen Mirren said in Calendar Girls.."we're going to need considerable bigger buns!"



just build a "Flic " rev you know you want one lol
GARY




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#68 david ellison

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Posted 19 October 2008 - 10:51 AM

David,
Try first putting in your stiffest rods, e.g. 4 wrap Revolution Equipped.
It will flatten the sail more thus forcing the air to spill over the sides, thus reducing the pull.
If you already did that, then back to the drawing board.


Hi John - I was using Skyshark 8P, which is much stiffer than the 4 wrap and my favourite 1/4 inch high wind rod. I think more holes are needed!


Gary - I'm not even going to dignify that remark - they're "girls's kites" ;)

#69 play365

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Posted 19 October 2008 - 11:15 AM

Gary - I'm not even going to dignify that remark - they're "girls's kites" ;)


You Know you want one .......you know you want one .........You know you want one ...ect ect lol
GARY




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#70 Mr Git

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Posted 19 October 2008 - 12:40 PM

Somebody's going to try to just fly some rods at this rate! :lol:
No problems getting it up - It's using it properly that's the problem!

#71 RevWizard

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Posted 19 October 2008 - 12:53 PM

Hi John - I was using Skyshark 8P, which is much stiffer than the 4 wrap and my favourite 1/4 inch high wind rod. I think more holes are needed!

Then it is back to the drawing board.
What do you calculate the wind surface is on your triple vent. Judging by the first one I made, it would have been very roughly 60% and that was a REV I.

Long John (formerly Mr. R)

STACK International Executive Committee - 6/1996-6/2008
International Rules Book Committee and STACK International Head Judge - 6/2004-6/2008
World Sport Kite Championship Judge - 2004-2005-2006(Chief Judge)
13x 1st - 12x 2nd - 6x 3rd places in 37 overall Quadline individual competitions


Web Site - http://www.johnnmitchell.com/index.html Check it out today!


#72 RevWizard

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Posted 19 October 2008 - 12:55 PM

Somebody's going to try to just fly some rods at this rate! :lol:

There is a guy in Denmark who had a 100% screen vented REV II. It flew quite well in the strong wind of Fano Island.
This is back about 12 to 14 years ago.

Long John (formerly Mr. R)

STACK International Executive Committee - 6/1996-6/2008
International Rules Book Committee and STACK International Head Judge - 6/2004-6/2008
World Sport Kite Championship Judge - 2004-2005-2006(Chief Judge)
13x 1st - 12x 2nd - 6x 3rd places in 37 overall Quadline individual competitions


Web Site - http://www.johnnmitchell.com/index.html Check it out today!


#73 Sailor99

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Posted 19 October 2008 - 01:08 PM

There is a guy in Titchfield who has a 100% mesh vented as well. It too flies very well. This was about 6 hours ago ;)
Over - Jeremy

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#74 Jonesey

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Posted 19 October 2008 - 01:42 PM

There is a guy in Titchfield who has a 100% mesh vented as well. It too flies very well. This was about 6 hours ago ;)


In fact here is Sailor flying it..... cross your heart bra inspired.... all mesh with Kevlar/mylar strapping along load lines .... additional strap along leading edge since this photo was taken....

Fly's really nicely in its range 18 knots + and especially good in reverse!

Did some team flying with it today and has been flown by a few people and so far I think we all like it a lot ....

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#75 FortFlyer

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Posted 19 October 2008 - 04:41 PM

I'd like to share an experience I had cutting holes in a Rev II a few years back, I did a line of holes across the middle of the kite horizontal just something decorative and to let out a little extra air as they didn't make vented II's.

Well it did what I had expected with a very strange side effect, It flew in much lighter winds as well :confused!:

Now I've been pondering this for some time and I have a theory that the air passing through the holes swirls and does the whole air pressure thing that not only gives extra lift but can make it pull harder at times.

I think (but not sure) the screen in the venting disperses the air differently and actually smooths out the transfer as opposed to just having open holes, great example is the screen in a water faucet the diffusion it causes makes the water aerate and flow lighter and faster I would guess it would do the same for airflow as well.

Probably why those big screen kites fly so well with virtually no sail area.

Figured I'd throw that at you cause it still freaks me out that a kite with all these holes fly's better in less wind.

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Jim,
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#76 FortFlyer

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Posted 19 October 2008 - 04:45 PM

There is a guy in Titchfield who has a 100% mesh vented as well. It too flies very well. This was about 6 hours ago ;)


I wonder what it would take to have one of those accidentally end up in a lg envelope shipped to the US :kid_smartass:
Jim,
Ft. Taber Park & Brenton Point

Rev's are like a carbon framed out-of-body experience

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#77 deebs1596

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Posted 22 October 2008 - 07:01 PM

ever think of doing this to a B-series? maybe get hte precision of a B and the venting of a mega-vented?
----Dan-----

lost in thought or lost in a field... either way send a search party

i fly what i can and stare at what i cant.

#78 Dean750

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Posted 22 October 2008 - 07:09 PM

ever think of doing this to a B-series? maybe get hte precision of a B and the venting of a mega-vented?



Think the B's about as good as it's going to get. Now a Rev 1 would be interesting.

Dean

And no, I'm not going to puncture one of mine to find out.

#79 deebs1596

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Posted 22 October 2008 - 07:33 PM

-man, a super-vented rev I... that would be a great kite for days where you want to be precise but the wind is howling at 30+

-a mega-vented b-series...my thought was if the B-series is a great kite when its vented- if you cut out more venting in the same pattern as the existing ones(IE. vertical venting, adding more vertical vents), would it be as precise as a standard B in a high wind? Curious to see how it would preform.
-I'm surprised Revolution hasnt made a mega vented for you guys and girls over in the UK with the great wind you guys have
----Dan-----

lost in thought or lost in a field... either way send a search party

i fly what i can and stare at what i cant.

#80 Choccy

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Posted 23 October 2008 - 01:22 AM

How outrageous would it be if we were to experiment with cutting holes on Bluey ?

Bluey is a 8 month old vented B-series.
He's showing signs of wear and tear and general thinness from having newbies fly him and being on the beach getting sand blasted. etc.

Wonder what you all think ?

And as to the design of making holes around his vents ?

Was going to buy a new Bluey anyway to replace him.

I really need a mega vented kite.
1 of the 47.




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