3" ringfin that i designed

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bobbyg23

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I designed this rocket and had everdon rocketry cut the fins and slot the bt. 3" main body. 7.5" ring. Cant wait to launch it.
 

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Did you ever hear the one about the BAR who worked his way completely thru his build pile?

Me neither.

Got a potential release date?

- Matt
 
Very neat. Dare I ask how you simmed it? I'm still not sure if I have a satisfactory way of simulating ring fins in open rocket.
 
I dont think open rocket will show the aerodynamic properties of the ring. An inner tube doesnt affect anything but weight and cg. I dont think it will even attempt to show its aerodynamics.

@neil_w What do you think?
 
I dont think open rocket will show the aerodynamic properties of the ring. An inner tube doesnt affect anything but weight and cg. I dont think it will even attempt to show its aerodynamics.

@neil_w What do you think?
I don't think so either. It should ge more stable than stated.
 
Yes but more drag/ less altitude then simmed. I built a 38mm rocket with about a 6 or 7 inch ringfin with the ringfin made out of 2 layers of carbon fiber. Completely shredded the ring on a G80. Turned it into confetti.....
 
I was also asking about simming the aerodynamics. There doesn't seem to be a good piece of software for this.
 
I dont think open rocket will show the aerodynamic properties of the ring. An inner tube doesnt affect anything but weight and cg. I dont think it will even attempt to show its aerodynamics.

@neil_w What do you think?
That is correct. I normally add a set of fins that I consider to be equivalent (using my own seat-of-the-pants methodology) for flight simming. So far it has worked out for me but I'm not exactly pushing any performance boundaries.

Aerodynamics are only accounted for on components in the Body Components and Fin Sets group.
 
That is correct. I normally add a set of fins that I consider to be equivalent (using my own seat-of-the-pants methodology) for flight simming. So far it has worked out for me but I'm not exactly pushing any performance boundaries.

Yep, unfold the ring and split its area across multiple fins to approximate the stability benefit. This is what I did years ago with The Lusty Cornmaiden.

Ring fings are also giant speed brakes. But they do look cool.

-Kevin
 
That is correct. I normally add a set of fins that I consider to be equivalent (using my own seat-of-the-pants methodology) for flight simming. So far it has worked out for me but I'm not exactly pushing any performance boundaries.

Aerodynamics are only accounted for on components in the Body Components and Fin Sets group.
Yup. I did the same at one point and it was nice and stable.
 

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