Biggest Big Bertha

The Rocketry Forum

Help Support The Rocketry Forum:

qquake2k

Captain Low-N-Slow
Joined
Jan 26, 2010
Messages
13,573
Reaction score
38
What about u-bolts instead of eyebolts?
 

Steve Shannon

Well-Known Member
TRF Supporter
Joined
Jul 23, 2011
Messages
6,690
Reaction score
3,529
Location
Butte, Montana
Maybe one of you very large project builders can weigh in on this question...at what point in weight /size do you have to go to forged eyebolts, rather than the typical stainless steel product we get at the local hardware store?
I use welded or forged eyes or u-bolts for anything high power. I've seen eye bolts open with openings that were not extremely fast. I've also seen forged eyes bent with extreme events. Bent is better that open and the price difference doesn't justify using inadequate hardware.
 

dhbarr

Amateur Professional
Joined
Jan 30, 2016
Messages
7,157
Reaction score
1,570
When I get the forge running again, somebody pester me until I remember I wanted to try flattening an eyenut into a D
 

wadavidson

Well-Known Member
Joined
Oct 11, 2016
Messages
235
Reaction score
48
ImageUploadedByRocketry Forum1488139963.232571.jpg

Coming together!

For a size comparison, the red tube on the ground is a piece of 8" dia G10 60" long
 

DAllen

Well-Known Member
Joined
Jan 18, 2009
Messages
4,973
Reaction score
993
You know you have a large rocket when inserting a small child for flight is not a technical issue, rather an ethical one.
 

redleder

Well-Known Member
Joined
Feb 14, 2017
Messages
117
Reaction score
0
Love it. Where are you going to launch that? How high will it go?


Sent from my iPhone using Tapatalk Pro
 

DAllen

Well-Known Member
Joined
Jan 18, 2009
Messages
4,973
Reaction score
993
Dallen

That needs to be on a tshirt!
I would do that but I'm not the one that came up with the phrase. ;)

You know one of the funniest names I've ever heard for a rocket was, "She may be Ugly But She Has BIg Fins"
 

PiperCPO

Bagpiping B.A.R.
TRF Supporter
Joined
Mar 17, 2016
Messages
78
Reaction score
3
" Do these fins make my motor mount look big? ?? "
 

FerdBerful

Member Member
Joined
Apr 8, 2012
Messages
68
Reaction score
0
Cool build.

I'm looking forward to some awesome filght pix
 

ksaves2

Lifetime Supporter
TRF Lifetime Supporter
Joined
Nov 25, 2009
Messages
6,094
Reaction score
370
Location
Central Illinois
I'll say one thing. This project would have to go pretty "high" before it would be out of sight! Kurt
 

SDramstad

Well-Known Member
TRF Supporter
Joined
Jun 26, 2014
Messages
768
Reaction score
630
How many pounds of black powder will it need to eject?
 

wadavidson

Well-Known Member
Joined
Oct 11, 2016
Messages
235
Reaction score
48
Nope, this is my work paint booth that is a part time rocket booth.
 

wadavidson

Well-Known Member
Joined
Oct 11, 2016
Messages
235
Reaction score
48
Sure thing. Will probably need to help. Just put the entire airframe together today and this thing is heavy!!
 

wadavidson

Well-Known Member
Joined
Oct 11, 2016
Messages
235
Reaction score
48
ImageUploadedByRocketry Forum1490360985.442884.jpg

Ok, so this thing moved pretty fast.

Just a few odds and ends to finish up but looking pretty good!
 
Top