Hello Robert,
There will be some practical difficulties constructing a 1000 Ns motor
with very low thrust. For example, to keep Isp at similar levels for
all motors will require them to operate at similar pressures. A motor
operating at 600 psi requires a nozzle throat of slightly over 1/16" for
10 N of thrust; about 1/50" diameter for 1 N thrust! Even the smallest
amount of solid residue at the nozzle throat would cause a significant
if not dramatic increase in chamber pressure.
Best,
Terry
On 3/7/2017 8:12 AM, Galejs, Robert - 1007 - MITLL wrote:
Is there any general relationship between ISP and thrust for solid rocket motors? In particular, I’m wondering about making something like a 1000 Ns motor in several variants: 1000 N, 100 N, 10 N and 1 N thrust levels. Maybe there is some minimum practical thrust? Pointers to any good references on this are appreciated!
Thanks,
Robert
