Isn't AP --> KP about .01 burn rate exponent per 1% substitution in this
neighborhood ?
On Sunday, August 7, 2022, Boris du Reau <boris.dureau@xxxxxxx> wrote:
Hello Allthe pressure for the following motors with ammonium perchlorate an
I have managed to repair my pressure sensor with W40 and I have measured
with an 8mm nozzle and had a cato
38 mm 2 grains AP/Silicone with a 6.5 mm nozzle throat (see attached)
ð Pressure was 924 PSI
ð Burn time 0.8 second
ð H204 (163N) (previous tests were H206 and H224)
38mm 1 grain PP/Silicone with a 6.5 mm nozzle throat ( see attached)
ð Pressure was 544 PSI
ð Burn time 0.69 second
ð F114 (78N)
I did fire 5 time the 2 grains AP without any issue. I did a 3 grains
an 8mm nozzle and had a cato.
I did fire 3 time the 1 grain PP without any issue. I did a 2 grains with
with a 9 or 10 mm nozzle
I will try a 1 grain AP with a 4.5 mm nozzle and will re-try a 3 grains
replace some of it with nitrate.
Not sure what to do with the PP, maybe reduce the amount of PP and or
rate and the pressure.
I could also add some ammonium chloride with the PP to reduce the burn
friend Philippe has issue with Zinc
I cannot use any of the carbonate because the silicone does not dry.
I also have some silicone drying issues with copper oxide II and my
am looking for advices and help to control the burn rate and pressure
So agin base composition we are using is:
AP or PP 72.74539113
lamp black 0.332170736
silicone 1 24.23185517
Silicone 2 2.69058296
I know that the mailing list is mainly for for sugar propellant but I
I will also post the videos for the tests later on
Regards
Boris
