Biggest Big Bertha

[qquake2k]

What about u-bolts instead of eyebolts?

 

[Steve Shannon]

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]

When I get the forge running again, somebody pester me until I remember I wanted to try flattening an eyenut into a D

 

[wadavidson]

My 10 year old is lending a hand

 

[wadavidson]

Coming together!

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

 

[qquake2k]

That is one big a$$ Bertha!

 

[DAllen]

You know you have a large rocket when inserting a small child for flight is not a technical issue, rather an ethical one.

 

[Hellraiser]

You know you have a large rocket when inserting a small child for flight is not a technical issue, rather an ethical one.

ROFLMAO!!!!!

 

[redleder]

Love it. Where are you going to launch that? How high will it go?


Sent from my iPhone using Tapatalk Pro

 

[Lowpuller]

Dallen

That needs to be on a tshirt!

 

[Woody's Workshop]

One awesome Bertha!
I wonder, do you have a place to store it?
Or is there a building in the future?

 

[Bat-mite]

That is one big a$$ Bertha!

She's not fat, she's just big-boned.

 

[jd2cylman]

That is one big a$$ Bertha!

She's not fat, she's just big-finned.

Fixed that for you... :wink: :tongue: :grin:

 

[DAllen]

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"

 

[qquake2k]

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

Now that's hilarious!

 

[PiperCPO]

" Do these fins make my motor mount look big? ?? "

 

[DAllen]

" Do these fins make my motor mount look big? ?? "

Whatever takes the focus off your nosecone.

 

[FerdBerful]

Cool build.

I'm looking forward to some awesome filght pix

 

[wadavidson]

Paint and decals are going on

 

[ksaves2]

I'll say one thing. This project would have to go pretty "high" before it would be out of sight! Kurt

 

[wadavidson]

 

[SDramstad]

How many pounds of black powder will it need to eject?

 

[Steve Shannon]

Beautiful job. I'm looking forward to seeing it fly.


Steve Shannon

 

[Woody's Workshop]

View attachment 314931

You have a paint booth just for your rockets?

 

[wadavidson]

Nope, this is my work paint booth that is a part time rocket booth.

 

[wadavidson]

Sure thing. Will probably need to help. Just put the entire airframe together today and this thing is heavy!!

 

[Trident]

1 inch thick ply fins laminated with phenolic. Water Jet cut

That sounded really thick for these fins, then I realized that's scale thickness!

 

[wadavidson]

Ok, so this thing moved pretty fast.

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

 

[Bat-mite]

Wow, that look phenomenal! Nice job!

 

[ECayemberg]

View attachment 315423

Ok, so this thing moved pretty fast.

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

That's crazy....AWESOME!!!! That's a huge B...ertha! Turned out beautiful, Bill!!!!

-Eric-