08-12-2020, 11:27 AM
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SPEV/Orion wrangler
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Join Date: Mar 2005
Location: Atlanta, GA
Posts: 2,645
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Quote:
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Originally Posted by ghrocketman
I fully concur with Roy here.
Whenever I fly vintage motors, they have markedly better "off the pad" kick/performance.
Gives creedance to the concept that "yesterday's" BP was higher energy than today's.
I also wonder if "aging" the BP has any role ?
The delay grain produces MARKEDLY more tracking smoke in the old motors as well.
I have some real 1972 B14s with real drilled cores.
While the pressed-core B14/B8 kicks well off the pad, the older drilled core B14s accelerate "Warp-like" compared to the pressed cores.
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Estes has always said that the quality of BP they are getting has been declining since DuPont quit making black powder in the 70's. Back when Ed LaCroix ordered some A3-6T motors for Apogee in 1991, Ed Brown first doubted they could be made, and the ones LaCroix got were "filled to --or past-- the brim." The clay cap was just clinging by compression adhesion to the ejection charge. it couldn't attach to the casing! The culprit is the charcoal used in black powder, what wood it is made from, and how it's made. My understanding is that willow wood is the best; Goex uses maple.
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Roy
nar12605
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