From: jfindley@cinci.nospam.rr.com
In article ,
eaglesondouglas@gmail.com says...
>
> I have two amateur rocket designs. Both are ballistic, meaning they
> have a down range flight path.
>
> One is a 29mm high power engine design. I plan on using a
> 3D printer to make stack-able fuselage sections. A large printer
> should be able to make 8 inch tall sections. The section coupling
> is included. It is a finless design using a rotating launching tube to
> cause inertial stability. Say, 5000 rpm target. It uses 1-1/4
> standard pipe. schedule 40 or 80 can be used. The fit
> dictates the fuselage thickness around the engine. I hope for a
> three mile range controlled by payload mass. Say, a 45 degree
> launch tube. I have a proper end mill to cut out a standard
> 1-1/4 pipe bore in a 4 inch diameter vee-belt pulley.
>
> My question is where to test it out. Is there an approved
> range that allows ballistic flight paths?
>
> Or maybe I should be winging it and launching somewhere
> in the middle of the Chesapeake Bay?
>
> The second design is a 50 pound payload heavy lifter.
> Think like the engine is a 1 foot diameter and 1 foot tall
> cylinder with a safe fuel design.
You need to get in touch with a high power rocketry group. They usually
launch such things at meets where they get all the proper approvals
(e.g. FAA). If dim memory serves, I think Balls is the name of one of
the meets. Goggling...
Here we go:
Balls 29 Postponed due to COVID-19
http://www.tripoli.org/Balls29Postponed
Jeff
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