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Anders Greenman

Member Since 24 Jun 2006
Offline Last Active Jun 09 2009 08:35 PM
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Posts I've Made

In Topic: Green "laser" Effect From A Flare Fountain

31 December 2007 - 10:05 AM

Nope! Hi8 with no way to transfer the data to your pc is even worse! -_-
I bought NTSC instead of PAL making it impossible without analog-digital converters..

In Topic: How Will You Celebrate The New Year?

31 December 2007 - 10:01 AM

Greetings Bonny!

Marble, it's about 14 hours to the show up here :lol:

My arsenal for tonight will be seven 6" shells, some salutes and maybe some rockets. Will post a picture as soon as I got it.

In Topic: Cylindrical 2" Shells

15 December 2007 - 11:17 PM

I've bought some ornaments, but only for vakuum hemi molds. They really work great! You should be able to find them in sizes 6" and down. They're really great. No reinforcement are needed, just drill some holes and they're ready to go.

In Topic: rockets with headers

03 December 2007 - 10:07 PM

Some very nice rockets there man! Very good filming too! :)

In Topic: rockets with headers

01 December 2007 - 11:38 AM

could it be the position of the nozzle in the tube, i took a small endburner apart (in the name of science ;) ) and apart from finding it was in a thick plastic tube covered in paper, there was also no end plug! the nozzle was about 18mm up inside the tube.


I've noticed that too. I mean, at least half the tube is just air and clay! And the fuel seems to be pretty slow compared to BP. I guess it varies from motor to motor. The nozzle lenght might contribute to sound due to the increased friction from gases running down the nozzle. And the plastic tube is very thick indeed!
But the nozzle opening is not very small and so the only reason for such a wall thickness must be the lenght of the nozzle.


if you look on vk2zay,s website his rp rocket propellant seems to be less pressure dependant than bp ive had excellent results with it for a none eco friendly cheap case use plastic 22mm water piping to set a bentonite plug into it smear sticky glue around inside end of pipe then dip pipe into coarse dry sand or grit now you have a grit ring round the inside of the tube ram your bentonite plug dont bother waiting for glue to dry its only purpose was to hold grit in place as you ram the plug the grit is impacted into the tube wall locking the bentonite plug into place if you have to drill the plug theres no sand or grit mixed in to make it difficult to drill i use 3mm hole


I add about 25% rough blasting sand to my clay and cut riflings inside the tube. I also press the first increment without tube support (plastic tubes), so it expands and makes it almost impossible for the nozzle to blow out.