- UK Pyrotechnics Society Forums
- → Viewing Profile: Posts: Anders Greenman
Community Stats
- Group General Public Members
- Active Posts 72
- Profile Views 5,161
- Member Title Member
- Age 33 years old
- Birthday September 5, 1991
-
Gender
Not Telling
-
Location
Norway
-
Interests
Pyrotechnics, chemistry, climbing, skiing, hiking, medicine, rc, hanging out with friends..
User Tools
Posts I've Made
In Topic: Green "laser" Effect From A Flare Fountain
31 December 2007 - 10:05 AM
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
Marble, it's about 14 hours to the show up here
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
In Topic: rockets with headers
03 December 2007 - 10:07 PM
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.
- UK Pyrotechnics Society Forums
- → Viewing Profile: Posts: Anders Greenman
- Privacy Policy
- Forum rules ·