[AR] Re: Dynamic stability in supersonic rockets
- From: "Troy Prideaux" <troy@xxxxxxxxxxxxxxxxxxxxx>
- To: <arocket@xxxxxxxxxxxxx>
- Date: Fri, 19 Nov 2021 10:36:42 +1100
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 actively
controlled 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
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