Has anyone tried this? Its an idea that I have for a finless rocket, where there are intake vents under the nosecone which lead to channels through the body tube, allowing the air to exit around the motor housing?
Has anyone tried this? Its an idea that I have for a finless rocket, where there are intake vents under the nosecone which lead to channels through the body tube, allowing the air to exit around the motor housing?
Has anyone tried this? Its an idea that I have for a finless rocket, where there are intake vents under the nosecone which lead to channels through the body tube, allowing the air to exit around the motor housing?
Alright, this is what I had in mind. The engine's thrust being used like a jet-pump to start airflow across the channels. The green areas are the vents in the rockets BT. Blue is the airflow, red is the thrust. the circle with the cross is a view of the rocket from the bottom, with the vertical MMT supports shown in black. The channels are closed off from the rest of the inside of the body tube, so the ejection charge will not leak through them.
Alright, this is what I had in mind. The engine's thrust being used like a jet-pump to start airflow across the channels. The green areas are the vents in the rockets BT. Blue is the airflow, red is the thrust. the circle with the cross is a view of the rocket from the bottom, with the vertical MMT supports shown in black. The channels are closed off from the rest of the inside of the body tube, so the ejection charge will not leak through them.
Is it possible to sim this in open rocket?
(And if this isnt viable I can always put a gyro in the payload bay)
View attachment 142963
I have extra rocket parts. Ill just make a mock-up, tie a string to it, and spin around in circles and see what happens. *shrug*
Heads up flight?
Was that a typo? Shouldn't that have been "Little Auger" ???This is like the old Estes Little Augie design except without the fins. It is probably not stable.
I think you would need to vent out the side to try to create a correcting force to push the rocket back.
This is the principal used in ducted cone rockets (see: https://www.rocketryforumarchive.com/showthread.php?t=7016). Many of these of all shapes and sizes have been done over the years. There was a nice design article done in Extreme Rocketry IIRC about a dozen years ago that went through the aerodynamic principles and parameters.
If I am interpreting your picture right, this could also be considered a ring fin located just below a transition. The ring fin is the same diameter as the "main" body tube above it, but larger than the diameter of the lower body tube. You also indeed have four "internal fins" as pictured attaching the outer ring to the smaller lower body tube.Alright, this is what I had in mind. The engine's thrust being used like a jet-pump to start airflow across the channels. The green areas are the vents in the rockets BT. Blue is the airflow, red is the thrust. the circle with the cross is a view of the rocket from the bottom, with the vertical MMT supports shown in black. The channels are closed off from the rest of the inside of the body tube, so the ejection charge will not leak through them.
Is it possible to sim this in open rocket?
(And if this isnt viable I can always put a gyro in the payload bay)
View attachment 142963
If I am interpreting your picture right, this could also be considered a ring fin located just below a transition. The ring fin is the same diameter as the "main" body tube above it, but larger than the diameter of the lower body tube. You also indeed have four "internal fins" as pictured attaching the outer ring to the smaller lower body tube.
Also true, but even if you lost some of the unique look, you would still have the ability to launch it out of a tube.Of course, the wider the gap and the longer the transition the less "unique" the rocket looks.
Check out the design of the "Flyin' Stovepipe", Estes Rocket Plan #56, 1968. Similar to what you're describing.
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