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heinz

Member Since 09 Feb 2005
Offline Last Active Jan 07 2010 09:55 PM
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Posts I've Made

In Topic: Cylindrical Shells

26 June 2005 - 06:23 PM

Hi there.

Here is my second 6" shell and my first attempt
to use changing stars.

6"_Spherical_2

weight without lift: 1025g
liftcharge: 50g BP
bursting charge: BP on corncobs
height of break: about 190m
main stars: about 200 tigertail-titan to red (Mg fuelled)
pistil stars: about 100 green (Mg fuelled)

However, nice colors at life shooting but bad colors in
the video.

Greetings
Heinz

In Topic: Cylindrical Shells

15 May 2005 - 10:12 AM

The pistil stars are simply placed in the burst charge.

In Topic: Cylindrical Shells

11 May 2005 - 10:21 AM

Dj Killerboss - PM

Sprengman - tigertail stars are really not hard to ignite, so they don?t need
a primer at all... as long as the bursting charge is not too fast.


alany - i?ve used a simple zinc spreader composition for priming:

Zinc Spreader Star #2

Potassium nitrate...20
Zinc dust...57
Charcoal...10
Sulfur...06
SGRS...07

and this is the golden wave composition from Shimizu:

golden wave #2

Potassium nitrate...37
Aluminium...47
Sulfur...09
Boric Acid...01
SGRS...06

but i?ve taken red gum instead of SGRS and pumped them with alc.

paul - you are right. The stars have been dipped only with one end.

In Topic: Cylindrical Shells

09 May 2005 - 03:30 PM

Thank you. :)

Moe - I?ve cooked the tigertail composition, and after that I ballmilled it again.
Just ballmilling and rolling is the next thing I?d like to test, since I use SGRS.

sasman - after assembling the two plastic hemis I?ve pasted them with 10
layers of kraftpaper.

In Topic: Cylindrical Shells

09 May 2005 - 09:20 AM

Hello Guys,

I?ve just finished my first 6" spherical shell and like to share the results.

here is a picture from construction:

Posted Image

and here is a picture from the break:

Posted Image

And here is the video:

6" spherical

Technical data

height of break: about 110 meters
total weight: 1 kg
outer stars: 220x tigertail, rolled
pistil stars: 100x green, Mg-based, tigertail primed
other stars: 24x Shimizu golden wave, Zn primed
break charge: BP on corncobs
lifting charge: 50g BP

Greetings
Heinz