[AR] Re: APCP properties, was Re: Re: starship abort?
- From: BrianK ABQ <cielobenazul@xxxxxxxxx>
- To: arocket@xxxxxxxxxxxxx
- Date: Sun, 30 Apr 2023 01:47:11 -0600
Ken,
I can't find that notebook so I'm working off memory here.
1. I usually made an 84% to 85% solids motor. Trimodal AP: 400, 200, 90 &
Under. 5% Al. They were quite reliable and reproducible.
2. For the 88% solids I added Lecithin (0.5%). Didn't use in my normal
motors.
3. Added more AP to get to 88%. Qmodal AP: 600, 400, 200, 90 & Under.
4. Had quite the "phase transition" in viscosity. After mixing for a while
it changed into a much less viscous fluid. And stayed that way through
casting.
That's all the detail I recall.
Cheers,
Brian
On Sun, Apr 30, 2023 at 1:12 AM roxanna Mason <rocketmaster.ken@xxxxxxxxx>
wrote:
That's a decent solids loading Brian, perhaps the lecithin acted as a
surfactant. Was this a single, bi or even trimodal?
Ken
On Sat, Apr 29, 2023 at 11:05 PM BrianK ABQ <cielobenazul@xxxxxxxxx>
wrote:
I briefly encountered some viscosity issues. I was trying to make some
small batch APCP with 88% solids. I recall two things.
1. A little lecithin (0.5%?) made a big difference.
2. After adding all the AP the mix really thickened. But after a bit of
mixing (20 min or so) the mix suddenly thinned and was fine to make motors
with.
Those behaviors are very finicky and formula dependent.
Cheers,
Brian
- References:
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
- [AR] Re: APCP properties, was Re: Re: starship abort?
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