Robert Goddard experimented with jet deflection at his Roswell flight test
range in the 30's.
Ken
On Thu, Nov 18, 2021 at 3:37 PM Troy Prideaux <troy@xxxxxxxxxxxxxxxxxxxxx>
wrote:
Behalf Of John Stoffel
Sent: Friday, 19 November 2021 2:23 AM
To: arocket@xxxxxxxxxxxxx
Subject: [AR] Re: Dynamic stability in supersonic rockets
So active control is the real answer. Whats the smallest activelycontrolled HPR
these days that people have built?
The most practical motors for HPR have generally been solids and the
typical
solids made for HPR applications don't really lend themselves for practical
active control due to their high L:D ratio eg. gimbaling or TVC. Of course,
it has been done (eg. Joe Barnard's work) , but it's not an option for
minimum diameter monocoque style performance rockets. Larger professional
solids offer nozzle gimballing, but that tech is still a bit exotic for
HPR.
There's also the issue of active guidance being a tricky/prickly regulatory
topic within the main organizations offering the insurance coverage and
safe
participating environment and also to the regulators providing the
framework
for such. Many of these HPR events can be quite large with participants
from
all walks of life with varying skill levels, experience, quality cultures
and potentially many spectators.
Troy