Split trailing edge

[potatoman 0]

Was wondering if there has ever been a design where the brake line connected cells were split from the rest of the cells, on the trailing edge.....

Something like an aileron on a plane wing, where the rest of the trailing edge would remain straight, and only the "control surface" would change during input.

Or is there a reason for it not being split?

You have the right to your opinion, and I have the right to tell you how Fu***** stupid it is.
Davelepka - "This isn't an x-box, or a Chevy truck forum"
Whatever you do, don't listen to ChrisD.

[piisfish 140]

yes it did exist, plus it is used on the huge squares

scissors beat paper, paper beat rock, rock beat wingsuit - KarlM

[potatoman 0]

Any names I can look up, or pics of it.

You have the right to your opinion, and I have the right to tell you how Fu***** stupid it is.
Davelepka - "This isn't an x-box, or a Chevy truck forum"
Whatever you do, don't listen to ChrisD.

[pchapman 279]

To follow up on piisfish:

- modern huge cargo chute experiment

Para-Flite Megafly
http://defense-update.com/products/m/megafly.htm

- old sport chute

Para-Sled
http://www.parachutehistory.com/ramair/parasled.html
(Hard to see the split at the center of the trailing edge on the photo)

[leon.hill 1]

What you're seeing in that photo, isn't a "split" in the brakes from the canopy, you're seeing the 5 separate sections laced together. The brakes are attached normally.

[pchapman 279]

You are right, I didn't know what cells the brake lines attach to on the Megafly. Just that it uses splits. But I guess that is more for modularity in construction.

So here are some concrete examples:

For example, in a photo that can be enlarged on this page,
http://www.defenseindustrydaily.com/jpads-making-precision-airdrop-a-reality-0678/, the related Gigafly ties the split trailing edge together and has brake lines that attach at points apparently unrelated to the evenly spaced split point.

This appears shows something similar on the Megafly
http://www.google.com/imgres?hl=en&tbm=isch&tbnid=eqcqDpkZLpjmKM%3A&imgrefurl=https%3A%2F%2Finfo.aiaa.org%2Ftac%2FAASG%2FADSTC%2FPhotos%2520and%2520Images%2FPATCAD%25202009&docid=sMkinCuaBKO8bM&imgurl=https%3A%2F%2Finfo.aiaa.org%2Ftac%2FAASG%2FADSTC%2FPhotos%252520and%252520Images%2FPATCAD%2525202009%2FTwo%252520Megaflies%252520in%252520Flight.JPG&w=1950&h=1601&ei=iFYwU6mlCpTOyAHJhoD4DQ&zoom=1&ved=0CHUQhBwwCw&iact=rc&dur=2766&page=1&start=0&ndsp=43

[dragon2 2]

Not that old

[inline parasled.jpg]

[inline parasled1.jpg]

ciel bleu,
Saskia

[Boogers 0]

potatoman

Was wondering if there has ever been a design where the brake line connected cells were split from the rest of the cells, on the trailing edge..... Something like an aileron on a plane wing, where the rest of the trailing edge would remain straight, and only the "control surface" would change during input.

Good question. It does seem kind of odd that our parachutes are still inducing turns by warping the wing just like the Wright Brothers did it back in 1903. Seems like some better method would have come along since then. Maybe these split tails create more malfunctions by giving lines a crease in which to get stuck creating more line-overs?

[Quagmirian 40]

Except that wing warping is actually aerodynamically superior to traditional control surfaces.[citation needed]

[RiggerLee 61]

That's not completely true. There are limits to the performance of a single surface. There are advantages to a separate or mutable surfaces. Think faller flap.

Lee

Lee
lee@velocitysportswear.com
www.velocitysportswear.com

[accumack 14]

Some people split the tail on the Para-Flite ParaPlanes and the Cloud it offered little to no advantage and added complexity. Also a single surface flap on the ParaPlane.

[riggerrob 643]

That would induce an extra vortex every time the two pieces of trailing edge were not even.
Extra vortices create extra drag, but no extra lift.

[phoenixlpr 0]

riggerrob

That would induce an extra vortex every time the two pieces of trailing edge were not even.
Extra vortices create extra drag, but no extra lift.

Turn by break line is about inducing drag anyway.

[piisfish 140]

phoenixlpr

Turn by break line is about inducing drag anyway.

not only. Depending on the wings you are using, you can even turn the opposite way you are pulling

scissors beat paper, paper beat rock, rock beat wingsuit - KarlM