Dual Parachute Recovery (2 chutes on one harness)????

The Rocketry Forum

Help Support The Rocketry Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Banzai88

Lvl 2, Wallet..even more destroyed
TRF Supporter
Joined
Jul 15, 2015
Messages
3,938
Reaction score
2,659
Anyone ever do a dual(or more) parachute recovery? 2 or more parachutes on one attachment point to the shock cord/recovery harness?

Did it work? Is it as simple as half sizing each chute (2-18s instead of 1-36, etc)? RS/OR sim it decently? Not sure if I should trust what the sim is telling me.

Something like this:

Skycat%20Drone%20Dual%20Parachute%20Rigging.jpg
 
I think I've seen some photos of it being done, but haven't done it myself. I imagine that it wouldn't simply be dividing diameter of the chutes though, but rather dividing the area For example, 36" dia --> A = 1017.88 in^2, divided by # of chutes, say 2 = 508.94in^2 --> 2x chutes with approx. 25.5" diameter.
 
If I can locate it, I have a document about setting up multiple chutes on the same attachment point, will see if I can find it this evening.
 
I think I've seen some photos of it being done, but haven't done it myself. I imagine that it wouldn't simply be dividing diameter of the chutes though, but rather dividing the area For example, 36" dia --> A = 1017.88 in^2, divided by # of chutes, say 2 = 508.94in^2 --> 2x chutes with approx. 25.5" diameter.

Yep, OR keeps telling me that I need two of the next smaller size to replace one larger one. Example: it takes two 36s to replace one 48.

If I can locate it, I have a document about setting up multiple chutes on the same attachment point, will see if I can find it this evening.

That would be cool, thanks.

I just think that it would look COOL!
 
It's not just sizing,,
I think there's a special way to pack them for multiple chute...
See if we can get some guy's to respond that are into scale...
I remember someone that flew one of the Saturn rockets,
I think it was a "V" did a lot of research on how to size,, connect,, and pack the 3 chutes...
Hey,, anybody got Steve E's email addy ???
He's got to know for sure...

Teddy
 
ImageUploadedByRocketry Forum1474555088.392145.jpg

ImageUploadedByRocketry Forum1474555131.126492.jpg

I fly three 50" top flight recovery parachutes on my Super Jart 75. All attached at same point on recovery harness. I don't believe that they are as efficient as one chute divided by three. Because each chute spills a little more air because they are at a slight angle from pushing away from each other. I fold and pack each one separately. I put them one at a time into the nose cone.
 
View attachment 302004

View attachment 302005

I fly three 50" top flight recovery parachutes on my Super Jart 75. All attached at same point on recovery harness. I don't believe that they are as efficient as one chute divided by three. Because each chute spills a little more air because they are at a slight angle from pushing away from each other. I fold and pack each one separately. I put them one at a time into the nose cone.

Cool. Anything special about how you fold or pack the individual chutes? Tangle much on deployment or during recovery?
 
I don't have a special way to fold them. They tend to push away from each other so they don't tangle.
 
I got to see Jeff's (Mightyrocketman) Super Jart in action at AirFest this year. It looked pretty neat recovering on multiple chutes. The deployments all looked great with no issues.
 
Back
Top