At this point, weight and materials are moot. I seek first to find a
grain geometry that will give 10-min reasonably flat curve.
Better question might have been: can any grain be configured to give a
flat ten-minute thrust curve?
And if so, pray tell what formulation?
Edward
On 3/3/21, DH Barr <dhbarr@xxxxxxxxx> wrote:
Does it have to fly? Very much changes the question WRT casing material,
nozzle weight, etc.
On Wed, Mar 3, 2021 at 12:07 PM Peter Fairbrother <peter@xxxxxxxxxx> wrote:
On 03/03/2021 17:41, Dr Edward Jones wrote:
Thanks Ken, and there remains a couple of issues with end-burning
Jetex-type propellant.
First, Jetex propellants require the unobtainable
2,4-dinitroresorcinol, and second, end burn grains--even Jetex--burn
into a concave, ever increasing area, making it impossible to keep
within the +/- 10% thrust demands.
Ideas on overcoming those?
Start with a deeply concave face? "ever increasing" is not infinite here
afaict.
Peter