Page 1 of 1

Revs. Stack Lines

Posted: Sun, Aug 26 2007, 09:26 AM
by Hector Herrera
Hi everyone, I am thinking about making me a set of three Revs, similar to what Mike has, Rev ll, Rev 1.5 and Rev. l, but I don't know what lenght lines to put in to hold them together. Can anyone tell me about it.
Thanks
Hector

Re: Revs. Stack Lines

Posted: Sun, Aug 26 2007, 09:36 PM
by Mike
There are a lot of ways to do it. The first stack I put together just had 4 lines between each kite. They were attached to each end of the vertical spars.
It flew well and were quickest to add and remove. I seen all different lengths between stacks. Try somewhere between 3 to 5 feet between kites.

The official Rev stack lines are 4 1/2 feet in between the kites and they use 7 lines (each spar tip and the center). If you want to add more then 4 lines, just measure the distances once you have the 4 lines attached.

[b]Re: Revs. Stack[/b] Lines

Posted: Sun, Sep 02 2007, 12:14 PM
by Hector Herrera
It's so good to have knowledgeable people around, and thanks to Mike's info. this is the result of my first encounter with such a nice "advice".

http://video.google.com/videoplay?docid ... 3926&hl=en

First time flying a stack, and for been a home made, I think I will make a few changes to the spar system, I felt they were not even. The kite in the back was too heavy, and I think I should learn, to fly and control the kite behind, not the front.???

Re: Revs. Stack Lines

Posted: Mon, Sep 03 2007, 12:14 AM
by Frodos Majik
Hi Hector,

First I have to say nice flying!! :up: As far as you saying, you need to fly the back kite, I would say not to do that. I have a stack of three regular 1.5s. You need to fly the front one, the rest are along for the ride. I Would also suggest to have your wife stand out under the stack while your flying around and have her look for stack in the lines between the kites. If she sees any, try shorting those line to take out the slack. That may help in stopping the bounce between them.

When Mike first got his progression stack, he had me do just what was suggested, after done it made them rock solid. :up:

Hope this helps.

Re: Revs. Stack Lines

Posted: Mon, Sep 03 2007, 06:25 AM
by Mike
Hector,
nice video. Fun idea with the newspaper headline :-)

That stack looked good to me. In the early part of the video it looked steady when you were hovering at the edge of the window by the pier (is that Seal Beach?).

You are right that a standard stack, with all the kites the same size, the back kite is the one that causes problems. I haven't noticed much of that problem with the progressive stack. You could try adjusting the lengths of the lines to the last kite. Usually the back kite flies faster than the rest of the stack, but it seems you are saying that on your stack the back kite is flying slower. Try shortening just the top lines between the last two kites a little bit and see if that flies better. If the back kite is flying ahead of the other kites, shorten the bottom lines to that kite.

A stack wont hover in the same way as a single Rev. If you start to get some wobble when you hover, slowly move forward.

Good luck!

Re: [b]Re: Revs. Stack[/b] Lines

Posted: Mon, Sep 03 2007, 06:43 AM
by Babbman
Hector Herrera wrote:The kite in the back was too heavy, and I think I should learn, to fly and control the kite behind, not the front.???


I'm pretty sure that the way I heard it is that on a normal stack with all the same kites, you fly the back kite..

On the Progressive stack, you fly the front kite...

Re: Revs. Stack Lines

Posted: Mon, Sep 03 2007, 07:23 AM
by Hector Herrera
Thank you, each one of you for your recomendations. I'll see what I can do. one thing for sure is that the rear kite had the very large spars, and the one in the midle, light ones so I change the one in the back for revolution profetional spars. If I have time today I will check them out.
Thanks again.
Yeah...seal Beach allright, getting ready for Sept. 16th. "Too Much fun" team will be there, You know, Ron Despojado, the Lumas, I guess Jim and Lynn Foster, and Others, along with the Japanese kite makers and flyers, you know they make some very nice kites. It's gonna be super.

http://www.kiteclub.org/index2.htm

Re: Revs. Stack Lines

Posted: Mon, Sep 03 2007, 07:46 AM
by Mike
I would keep a close eye on the 2 wraps ("Professional Use Only") spars on the big Rev I sized kite. That long leading edge can put a lot of flex on the spars.

In my stack, I'm flying 3 wrap spars ("Ultra Light") on the 1.5 and 1, with 4 wrap spars ("Revolution Equipped") on the Rev II. I'm not saying that's the best way to go, because I haven't experimented with anything else. It works for me though.

Re: Revs. Stack Lines

Posted: Fri, Sep 28 2007, 09:03 PM
by Hector Herrera
I have another question guys...when you put you stack away after flying, do you completely take them apart? I mean individually, or...do you somehow keep them together for next time?

the way I had mine I completely separate them from each other but is a mess half way in between, and since I used lark head knots for each attachement line, I allready lost a couple and will make new ones. Are your attaching lines firmly tied to each kite?
Thanks...(more than one question :oops: )
Hector.

Re: Revs. Stack Lines

Posted: Fri, Sep 28 2007, 09:27 PM
by Mike
The stacking lines are larksheaded onto the endcaps, just like the bridle is.
I don't take the stacking lines off.

On my 6 stack, I took the vertical spars out and left the leading edge connected. I rolled all 6 kites up together and stored it in a bag as long as the LE (7 feet?).

On the graduated stack, I remove the vertical spars, loosen the LE spars and fold the whole stack of kites in on each other, making a sandwich with the rev 1 wrapped around the smaller kites.

Re: Revs. Stack Lines

Posted: Mon, Dec 29 2008, 06:08 PM
by linekahuna
Found that five feet between kites works well.
Cut pieces of dacron 12" long and burn ends. Make 7 per kite.
Double line and tie an overhand knot near the tips.
Measure link lines to 54". Cut. Place a mark 10" from each end, fold end to mark and tie overhand knot.
Seal ends with a lighter. Make seven between kites.
That's all there is to it, simple.

LK.

Re: Revs. Stack Lines

Posted: Mon, Dec 29 2008, 09:02 PM
by Jeepster
[quote="Mike"]
On my 6 stack, I took the vertical spars out and left the leading edge connected. I rolled all 6 kites up together and stored it in a bag as long as the LE (7 feet?).
[quote]

Mike,

There was a discussion on the Rev forum not too long ago about experimenting with designing a small wing span six kite stack. I think the wing spans were more like four feet. After flying your seven foot stack and your progressive stack, how do you think a stack of four footers would fly?

Cheers,
Tom

Re: Revs. Stack Lines

Posted: Mon, Dec 29 2008, 10:56 PM
by Mike
My rev II stack flies really well. It's probably what? 6'?
A 4' stack would be faster and more squirrely. But being a stack it would slow it down and tame it.
I once flew a stack of mini's that I think were smaller than 4' and they were really, really quick.

4' might be the smallest you could go and still not be crazy.
You wanna make it?

Re: Revs. Stack Lines

Posted: Tue, Dec 30 2008, 07:33 AM
by Jeepster
Mike wrote:4' might be the smallest you could go and still not be crazy.
You wanna make it?


Yea, I've been mulling that one around. Even though it's shaped like a Rev, it's not something they offer; so, it should be more acceptable in public than a straight knock off. After the holidays I'll do the research and get your input.

Cheers,
Tom

Re: Revs. Stack Lines

Posted: Tue, Dec 30 2008, 09:14 AM
by Mike
I'd make them without LE screening, with a one piece carbon tube for the LE.
For the sail pattern, I'd scale down from a II or 1.5.
I don't think minor differences in sail shape design will matter for a stack and wouldn't worry about it.

I'd leave off the screening because stacks don't fly well in reverse anyway. And you'll want to keep as much sail as you can because you might be losing out in the sail area / spar weight ratio (I haven't done the calculations, I could be wrong) when you go that small.

When I made the rev II stack it took about 2 hours per sail. I made the 5 stack over 2 days.
The lead kite has Rev spars, the other kites use pultruded carbon. The pultruded carbon spars had a hard time in high winds though. Some of them have split along their length, but I still fly them even though they're split (?!)

I made the II stack with LE sleeves but I think I would make the 4' stack with one piece of material, folding the top over to make the the sleeve for the LE. It would speed construction and should work well.
You could also make it no-sew and just use tape. That's what the Washington Kite Club guys do.

But then I'm about getting something out there quick so I can play. I think you're more of a craftsman.

Re: Revs. Stack Lines

Posted: Tue, Dec 30 2008, 12:08 PM
by Jeepster
Mike wrote:But then I'm about getting something out there quick so I can play. I think you're more of a craftsman.


Be sure not to mix up being a craftsman with being a dedicated futz. The research, the thinking and the planning constitute the majority of the fun in an engineer's life. There's a saying that "you sometimes have to shoot the engineer to go into production." We're almost all turned on by coming up with just one more tweak to improve the design. So, yes, it'll take time before the first piece of fabric is cut ... but, boy will it be fun.

Cheers,
Tom

Re: Revs. Stack Lines

Posted: Tue, Dec 30 2008, 12:15 PM
by linekahuna
Have seen some Revs made of Xmas wrapping paper, silver was the color chosen. Looked really
cool in the sunlight. Having no mesh at the top would be a good idea.
Don't think Xmas wrapping would be very durable but quick to make.
Putting 7 tails on the back kite really adds to it.