51 replies to this topic

[a2wpyro]

hello

this may seem abit silly to most of you here but my best pyro acomplishment was completed today.
bp rocket.

id: 11mm
walls: 1.5 mm
motor length:6cm
weight:4g
nozzel 3mm

after a 1st atempt today it was a failure because of my lasyness of not using a clay endplug but a paper 1 it flew about 7ft then sore the ent plug shoot out.

2nd attempt was the same dimensions as the 1st but with a clay end plug this time,
as soon as the fuse hit the bp sparks flew out with a most satisfying "woosh".

i was woundering is there anyway i could measure how high my devices reach without using little probes on them?

[Richard H]

Hello, Could you please pay attention to your spelling, punctuation, and grammar. Always check your message BEFORE posting it. The above post is a bit sloppy to say the least

Well done with the rocket. Glad to see you heeded our advice and will never touch chlorate / sulphur mixtures again! Regarding the height of the rocket, I'm not brilliant at maths but I imagine you could calculate this with simple trigonometry.

[tajmiester]

Well you can do this:

• Get a piece of wood and nail in a cardboard tube or pipe so it pivots.
• Get someone to stand 25-50m away from the rocket launch with the device resting on a flat surface parallel with the ground.
• Measure the distance between them and the rocket using a metre stick or similar.
• Launch the rocket and get them to look through the tube and mark on the angle of the rocket at it's appogee on the wood.
• Measure the angle using a protractor.
• Using trigonometry to work out the height of the rocket:
  
  Height = (tan Angle) * Distance

Youre done!

Tris

Edited by tajmiester, 09 January 2004 - 04:49 PM.

[BurlHorse]

Well, Hello all, it's me the new guy again, I saw this and could not resist posting to it. Every year The Crackerjacks www.crackerjacks.org have three club shoots, 2 dayers that are a fine extravaganza of pyro fun. The last shoot is always in October and we have a Pumpkin busting competition during one of the 2 days, usually a couple of hours. Anyway, so my good friend Mike Seets, Pumpkin Grower Extrordinaire, Brings an 85 pound Pumpkin, I Bring a 2 pound Mag -55 Flash Comp Salute. Yep, 2 whole pounds of Flash in a 1" walled Fibreboard tube, 13" long, 5" OD.

( This was safely transported from our ATF Magazine, After I manufactured it (Orginally for an Aerial 5" Cylinder Shell/Salute) at our licensed Place of Manufacture, I don't suggest this project or formula for "Newbies")

As Mike Was driving the Pumpkin Out to the field, my other friend, Larry Maske, weilding a Salute that was about 1.5" OD and 14" long, with a Pumpkin that weighed about ten pounds, Dejectedly said...."Bear, I guess This means I am going to come in a VERY distant Second" HAHA

Well, We cut the hole in the Pumpkin, Set the Salute in, With about 6 Feet of Quickmatch and an E-Match attached to that, we unrolled about 600 feet of Firing wire, The Count down began after all spectators were about 1000 feet or more away, 3,2,1 I hit the button and watched that 85 pound pumpkin disintergrate with not so much as a single pumpin seed to be found in the 8 foot Blast ring, The Concussion was chestpounding and so loud it echoed through the mountains for what seemed like minutes. We (Mike and I) drove away the golf cart, smiling victorious and still today hold the record for Punkin Busting for the Crackerjacks.

Just thought I'd Share that, I am more proud of alot of other accomplishments, but this one is pretty funny......

Stay Green,

Bear

[Richard H]

I have a video of that Got it from a chap named Keith a.k.a 'Salute'.

[BurlHorse]

Richard, Please post it, ( A Clip I mean) I have been Promised Video from several folks and never recieved them, kinda hard to push the button and video tape, so please make it public! Alas, you gave no comment to your immpresion of it. Boo Hoo, I know it was awesome hahahahaha

Stay Green my Friend,

Bear

[BurlHorse]

Oh, Almost forgot, I'm posting the Mag-55 Formula in the proper area, Take great care and know that this formula is *powerful* and somewhat (HAHA) sensitive)

Bear