Durable cloth parachutes designed to be packed into your rockets with small body tubes!
You just got a really cool rocket, and you'd like to upgrade it to use a nylon parachute. But the problem with most nylon chutes is that the material is too thick and too stiff to pack into a small diameter tube. Here is a parachute that is made from thinner cloth which is also softer than other nylon chutes. It packs really tight and easily springs open once it is out of the rocket. They are perfect for your prized rockets that need a something stronger than a plastic chute. They are much stronger than the traditional plastic chutes that come with kit-rockets.
Since the lines are sewn on, they can withstand brutal openings that would leave plastic chutes in tatters.
Easily fits inside a 41.6mm (BT-60 size) tube.
Note: The Octagon chute diameter is measured across the parachute and is from flat side to flat side.
While we love our current suppliers of parachutes, we commissioned the creation of this parachute because we had continuous supply issues. At Apogee, we help so many customers with their need for quality rocketry parts that our supply partners have a hard time keeping up. When we are out of stock, we can't help anyone, right? It is especially painful when we want to help out school groups with their projects and they are under a tight deadline. Turning them away in their hour of need is not how we want Apogee Components to be remembered. So we contacted a big production house in China and had them make this parachute for us for the sole reason of taking care of our supply issues.
But if we were going through the hassle of having a new product created, we wanted something a bit more customized than just a single-color chute. So we paid a little more to have a nice colorful pattern printed on the surface. The result is a highly visible color scheme that makes it easy to see both in the sky and when it lands on the ground. And we styled it after those chutes used by NASA for the Orion spacecraft.
The areas that we fought with our Chinese supplier were the sewing on the edges and how the suspension lines are attached. For the line attachment, they wanted to attach only a short length of cord because it was cheap and easy for them. We wanted something strong that would survive a high-speed deployment. So we had them increase the length three-fold, and double up the cord as shown in the photo here. Now we feel it is overkill -- just like modelers like it.
On the perimeter edges, the supplier wanted to do a serged stitch. A serged stitch is strong, but we wanted something that didn't have loops of thread that could catch on a sharp edge inside the rocket, like a shock cord anchor that is glued to the inside surface of the tube. We wanted something that would slide out of a rocket with less of a chance of getting snagged. So we told them to fold the edge over twice and stitch on the seam. Now it has three layers of cloth on the edge, and there are no loose threads that could get snagged when the chute is ejected from the rocket. The production house thought I was crazy to ask for this, and they told me a story of another silly American that went against their recommendation and never re-ordered again. But I wanted a parachute that I would feel confident of using myself for my own prized rockets. This parachute, and how it is put together, is exactly what I'd want for myself, and I'm confident that after seeing it yourself, you'll want it too.
The suspension line cords on this parachute are way overkill. You'll never have to worry about a line breaking. And as mentioned, we had the supplier double up the cord where it attaches to the canopy fabric to make sure it won't pull out. We don't know how strong they are, but we don't think you'll ever pull a line out of the chute.
One thing you'll love about this chute is how soft it feels. It packs up tight, so you can get it into smaller tubes, and it slips out easily. And because the fabric is so thin, the ink that they use for printing the color pattern bleeds through easily, so that both sides of the cloth are vibrant. You will have a hard time telling the side that was printed on from the underside. See the photos here on this page to compare the colors on both sides of the fabric, and to see the quality of the stitching of the edges and where the lines are sewn on.
So if there is a drawback to this chute, it is that we had to have it made in China. I would rather use domestic suppliers, but we know the price is also a concern for customers. We have and sell other great chutes that are made here in North America. But if you want something a little different, you might consider this chute. We put as much work and effort to have it made as we would any other rocketry product. We're proud to have the Apogee logo printed on it because we stand behind it.
Gather the line loops. Thread them as a group through the loop on the nose cone shoulder or screw eye. Open the loops and pass the apex of the canopy through them. Gather the corners of the canopy and pull tight on the cords. This will keep the lengths equal.
At this time, we do not know. It has a tight weave, so we think it would be similar to other nylon chutes. The rough estimate we'd suggest you start with is a Cd of 0.75. Then do drop tests or actual launches to measure the actual descent rate. We suggest using a good recording altimeter to determine the descent rate of the canopy. See Peak-of-Flight Newsletter 208 to see how to use a recording altimeter to find important flight parameters.
The reason we like the shroud lines (also called suspension lines) to go across the canopy, is to eliminate twisted lines on a parachute. A twisted line can cause the chute to start spinning, and we want to avoid that so that it comes down as slow as possible. See this video below where we discuss this topic.
Great question. But we don't know the answer, because we haven't had it tested officially. We're trying to keep the cost down, so if we have to pay for cerfitication, that drives up the cost. Remember, we sell these as hobby parachutes, not for military applications.
The strength of a chute is determined by the materials and the assembly techniques. However, the load placed on the parachute is determined not only by the weight of the rocket (the payload), but the opening speed of the chute too. The higher the opening speed, the more snap and jerk the chute will feel. In other words, it intensifies the force on the parachute. We recommend you keep the opening speed under 50 feet/sec (34mph) for any parachute. But the weight of the payload also has to be taken into account.
We make every effort to specify a nice quality parachute that has good workmanship. But we do not know how much weight it can handle. Use your best judgement in selecting a parachute based on your past experience with similar size chutes.
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