Yep, supersonic. Still interested in a non-canted fin solution theory, if
any one knows of one.
Bill
On Saturday, July 16, 2016, Ben Brockert <wikkit@xxxxxxxxx> wrote:
I imagine your rockets go supersonic, so you'd be better off with a
canted fin (or a trim fin at the end of a fin) than a trailing edge
fin tab due to the change in behavior of a trailing edge control
surface in the transonic and supersonic regimes.
On Sat, Jul 16, 2016 at 11:37 PM, William Claybaugh
<wclaybaugh2@xxxxxxxxx <javascript:;>> wrote:
I'd be interested in a theory to describe this problem. My own interestis
in using fin tabs to assure spin at a specific rate (9-10 hertz), whichand
appears--to me--to be cheaper and more reliable than trying to carefully
align the fins to just the correct offset. Aligning them dead straight
using a fin tab appears to be much simpler....<javascript:;>> wrote:
Does anyone know of such an analysis?
Bill
On Saturday, July 16, 2016, Ben Brockert <wikkit@xxxxxxxxx
Gary Cooper posted this to the FAR facebook page, though he's flying
in northern California:
https://youtu.be/I-FhXvLtk-U
A homebuilt motor that appears quite reliable, and trim tabs on the
fins to get rid of the tiny amount of roll the rocket was doing.