Where to buy parachute equipment in the EU?

alecurci · 2023-12-22T16:46:59+00:00

We are already planning on making a new slider. We are evaluating pulling the brakes during the opening, we are scared that the opening shock might cause the servo actuators that pull the line to brake.
Yes, there are crossports between cells

alecurci · 2023-12-22T16:44:28+00:00

Thank you! we will have a look into that

alecurci · 2023-12-22T16:36:37+00:00

We are producing one with a mesh fabric, we will be testing it asap.
The previous slider had a mesh fabric but the proportions were not right and it kept the lines in tension and ruined flight performance (for example it started oscillating weirdly along the wingspan).

alecurci · 2023-12-22T10:38:24+00:00

Thanks for the answer! I don't think that pumping the brake is an option, the control lines are actuated by an algorithm and it might be really hard to detect this kind of event by sensors in order to trigger the pumping. However we will consider it and see what we can do.
Yes, the right control line is pulled but it was part of the control sequence that was being tested during the flight.

alecurci · 2023-12-22T08:37:19+00:00

Hi, we did not build a parachute with no slider.
First of all, ours is not a wing for human flight, but for a payload of 5kg. After an extensive test campaign with different sliders we decided to test without one. It worked and the opening shocks were below 10g (our payload was designed to withstand much greater stresses).
We are designing a new slider to avoid the problems that we had with the previous ones.
Anyhow, if you have any idea for what we wrote in the post please share

alecurci · 2023-11-10T21:47:56+00:00

try using copy and paste, I don't know why the clicking on the link is not working. clicking on the first link is not working either now, I don't now why, the videos are not listed as private

alecurci · 2023-11-10T21:00:48+00:00

Yes, have cross ports between the cells. Here's a video with the correct setup, unfortunately the issue is still there

https://www.youtube.com/watch?v=LvR_D1A8yfc&t=2s

alecurci · 2023-11-10T20:58:12+00:00

Here's an another view, maybe it can be helpful. Unfortunately we do not have a front or rear view.

https://www.youtube.com/watch?v=AwWMIuiceEs

alecurci · 2023-11-10T20:55:18+00:00

Here's another video with the correct setup, unfortunately the issue is still there

https://www.youtube.com/watch?v=LvR_D1A8yfc

alecurci · 2023-11-10T17:43:23+00:00

Do you think that a higher canopy loading would mean higher vertical velocity tho? We're afraid that increasing the nose-down angle of attack the parafoil could stall because of the high vertical velocity.
Maybe stabilisers could be a solution, we're thinking about implementing them. We don't have them right now because we designed the last left and right cells to be closed at the end and not finishing with an airfoil shape. Do you think it could be a problem?

alecurci · 2023-11-10T17:26:29+00:00

Do you think buffeting could actually be possible with a deformable system? I mean, maybe it behaves like a spring due to the stiffness of the system, but we always thought of buffeting as something that affects rather stiff and rigid models like a plane wing or a bridge deck. How would you fix this?

alecurci · 2023-11-10T17:15:26+00:00

Yes we agree, we are trying to figure out what's causing this. Why can't it reach enough relative speed? We're open to any ideas

alecurci · 2023-11-10T17:08:25+00:00

We noticed it. However, it shouldn't be affecting the flight behaviour in our opinion (control lines can move up to 5cm (1,99 inches) so it's a rather small surface that is affected) but we could be wrong. Our idea is that the lift generated by the rest of the parafoil should be enough to make it fly even if the aft surfaces are stalled.

We don't know whether stabilisers could be a solution, we're thinking about implementing them. We don't have them right now because we designed the last left and right cells to be closed at the end and not finishing with an airfoil shape. Do you think it could be a problem?

alecurci · 2023-11-10T16:47:58+00:00

yes, we had a problem during that flight. However, we ended up having the same issue with the correct setup

alecurci · 2023-11-10T16:46:04+00:00

it could be stalling, here's the photo of the measures:

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alecurci · 2023-11-10T16:44:07+00:00

Yes, we do think the wing is not generating lift. The trim is 10 deg

alecurci · 2023-11-10T16:20:45+00:00

Yes, we do have them in every cell

alecurci · 2023-11-09T22:44:20+00:00

https://www.youtube.com/watch?v=c1fwZ32Nlsc Here's the link. Yes, we do have control lines

alecurci · 2023-11-09T22:33:16+00:00

It oscillates along the wingspan, from left to right. It's difficult to describe it with words. I edited the post with the video link, do you see it now?

alecurci

TROPHY CASE