I don't have my cam here so I can't take an updated pic of my tooling but here is one before I machined the spindle:
And here is the movie of that one with a 3" dragons egg shell on the top of it.
http://www.infernola...shellheader.AVI
Big bertha
Started by
pritch
, Jun 19 2004 03:24 PM
24 replies to this topic
#16
Guest_Daniel Scott_*
Guest_Daniel Scott_*
-
- Guests
Posted 30 October 2004 - 03:28 AM
I made my own tooling for 1" end burners. First pic is the motor and the second is a size comparison of the rocket to a CD
I don't have my cam here so I can't take an updated pic of my tooling but here is one before I machined the spindle:
And here is the movie of that one with a 3" dragons egg shell on the top of it.
http://www.infernola...shellheader.AVI
I don't have my cam here so I can't take an updated pic of my tooling but here is one before I machined the spindle:
And here is the movie of that one with a 3" dragons egg shell on the top of it.
http://www.infernola...shellheader.AVI
#17
pritch
-
- General Public Members
-
- 276 posts
rocket man
Posted 03 November 2004 - 11:47 PM
Looks like a really nice rocket Daniel. It looks like a comercial rocket and it's making me want a press. Ive made another tonight and gonna set them both off on nov5. My second one i made tonight using a superior made case is gonna carry a 2 inch cylinder shell hopefully. Gonna use the formula you gave me for your silver stars shell only using an h3 burst.
#18
Guest_Daniel Scott_*
Guest_Daniel Scott_*
-
- Guests
Posted 04 November 2004 - 05:54 AM
And would you believe those are hand rolled rocket tubes! I love manila folders 
#19
pritch
-
- General Public Members
-
- 276 posts
rocket man
Posted 06 November 2004 - 12:51 AM
Well a big disapointment. The nozzle blasted out on the first one and the second one but the second one was kinda supposed to(long story).
I think I need to give up on this rocket. I dont think I can press the propellant in hard enough with my vice.
I think I need to give up on this rocket. I dont think I can press the propellant in hard enough with my vice.
Edited by pritch, 06 November 2004 - 12:26 PM.
#20
adamw
-
- General Public Members
-
- 1,297 posts
An old Leodensian
Posted 07 November 2004 - 06:07 PM
Why are you using a vice? Just get a rammer and a wooden mallet!
75 : 15: 10... Enough said!
#21
pritch
-
- General Public Members
-
- 276 posts
rocket man
Posted 07 November 2004 - 08:41 PM
It's a very big vice. Hammer tends to end up with split cases from the sudden impact and i get better nozzles and plugs using the vice.
Really though I think 1 inch is too much to solidly press together in a rocket using your hands. The commercial rockets I had were unreal compared to my own. Especially the big black cat kestral that carried up a nice spider shell and had a flash burst
Really though I think 1 inch is too much to solidly press together in a rocket using your hands. The commercial rockets I had were unreal compared to my own. Especially the big black cat kestral that carried up a nice spider shell and had a flash burst
#22
al69
-
- General Public Members
-
- 26 posts
Member
Posted 22 December 2004 - 07:14 PM
In that video have a look at about 9-12 seconds the fins move like mad. Whats up with that??. i never knew that could happen.I was passed this link jsut 5 mintues ago
http://www.videorock.../USS_Bakula.wmv
Impressive I thought
Will this be the big Bertha version 31 pritch?
check out my ebay sales
http://search.ebay.c...ssZpyromaster69
http://search.ebay.c...ssZpyromaster69
#23
broadsword
-
- General Public Members
-
- 287 posts
Pyro Forum Regular
Posted 23 December 2004 - 05:25 PM
And would you believe those are hand rolled rocket tubes! I love manila folders
So Daniel u use manila folder?
How, do you roll them? Do you use the same technique as normal tube rolling accept replace the Kraft paper with a manila folder?
Broadsword Calling DannyBoy....
#24
Karl
-
- General Public Members
-
- 314 posts
Pyro Forum Regular
Posted 23 December 2004 - 07:44 PM
In that video have a look at about 9-12 seconds the fins move like mad. Whats up with that??. i never knew that could happen.
I've seen that video before, the fins were made from G10. The fins hardly flutter, it's something to do with the video that makes it look that way.
Check out this thread on The Rocketry Forum where it was discussed. http://www.rocketryf...light=g10 video
Karl
#25
Guest_Daniel Scott_*
Guest_Daniel Scott_*
-
- Guests
Posted 26 December 2004 - 04:47 AM
Yes I use normal rolling methods. I would suggest using dextrin glue over PVA glue for these tubes. They need to hold a fair bit of preasure. I can't say PVA doesn't hold up because I simply havn't ever found one of these rockets after launch 
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
