"Vortex Ring Decelerator"... latest Apogee Newsletter

neil_w · Apr 4, 2019

Latest Peak of Flight describes a spinning four-vaned parachute with great performance characteristics that seems very cool.

Anyone ever tried to make one of these? Would be interested to hear any experiences.

jazzviper1 · Apr 17, 2019

They can be notoriously difficult to deploy properly. There is a reason the full sized ones never really caught on.

neil_w · Apr 17, 2019

Do you know if they work better at LPR/MPR size? They seem like they'd be pretty cool to watch coming down.

mbeels · Apr 17, 2019

I agree, I'm interested in seeing one. I may try and put one together and fly it in a LPR, worst case, if it doesn't deploy properly, it is at least a "streamer".

AlphaHybrids · Apr 30, 2019

I have a five panel rotofoil parachute. Similar concept, but a lot more fabric and more parachute like. It deploys easily and rotates on the way down. I tried smaller ones, 48" diameter, and had trouble with them. Minimum size for a rotofoil is about 60" for consistency. The vortex ring decelerator is in the TW Knacke manual, I've just never had the gumption to try to build it an get it to work, lots of adjustments.

Edward

IputtheAinBAMA · Apr 30, 2019

AlphaHybrids said:
I have a five panel rotofoil parachute. Similar concept, but a lot more fabric and more parachute like. It deploys easily and rotates on the way down. I tried smaller ones, 48" diameter, and had trouble with them. Minimum size for a rotofoil is about 60" for consistency. The vortex ring decelerator is in the TW Knacke manual, I've just never had the gumption to try to build it an get it to work, lots of adjustments.

Edward

BAMA Recovery Systems actually makes rotofoils down to 9 inches.

"Vortex Ring Decelerator"... latest Apogee Newsletter

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"Vortex Ring Decelerator"... latest Apogee Newsletter

Help Support The Rocketry Forum:

neil_w

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Yes balsa

AlphaHybrids

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IputtheAinBAMA

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