Wildman 5" Jayhawk Build Thread

[rfjustin]

Going to be fun build over the winter... @jd2cylman, you ready to get your wings in gear as well?

 

[rfjustin]

Near as I can tell the kit is about 6" too long as it sits right now. Some scale data was pulled from here:
https://www.rocketryforum.com/threads/scale-aqm-37-jayhawk-gallery.15501/page-2#post-1960634

 

[Theory]

This one will be cool for sure!

 

[DAllen]

 

[rfjustin]

This one will be cool for sure!

Lets hope so! I'm looking forward to it. No better platform to highlight the K-1800 ST... IMO...

 

[rfjustin]

Im opting to use a 10" coupler to join the tail cone and the main body tube instead of the 3" one supplied in the kit. I want a nice double walled area right at the base for not only rigidity, but a safe spot to drill and tap 2-3 rail guides. Obviously we are starting at the Aeropack and working our way up a bit.

 

[Theory]

Lets hope so! I'm looking forward to it. No better platform to highlight the K-1800 ST... IMO...

hands down one of my favorite L2 motors!!!!!!!!!!!!!

 

[crossfire]

Near as I can tell the kit is about 6" too long as it sits right now. Some scale data was pulled from here:
https://www.rocketryforum.com/threads/scale-aqm-37-jayhawk-gallery.15501/page-2#post-1960634

Looks like a very fun build. Are you going to shorten the tube?

 

[rfjustin]

Looks like a very fun build. Are you going to shorten the tube?

Without a doubt, yes. I'm not a scale purist, but the length (tip of nose cone to front of wings) needs to be "correct."

 

[rfjustin]

Easy epoxy flow will be had with this centering ring. No parts are scuffed up yet, need to get the rear centering ring and Aeropack locked down first.

 

[rfjustin]

 

[ECayemberg]

This is sweet! Go Justin, Go! Looking stellar thus far!

 

[rfjustin]

Looks like (4) 7" long aluminum angle irons will help keep the winglets in place. Going to take a page out of the @SMR playbook and screw and JB Weld these puppies in place. I really like the "extra" tab thickness sticking through that can be sanded down later.

 

[Theory]

The angle is a good idea. Can machine the edges for a smooth transition

 

[rfjustin]

The angle is a good idea. Can machine the edges for a smooth transition

I would love to have that option, but I don't have access to machine tools and such unfortunately.

I miss Machining Tool Tech in High School!

 

[rfjustin]

Yep, that'll work...

 

[thzero]

I would love to have that option, but I don't have access to machine tools and such unfortunately.

I miss Machining Tool Tech in High School!

Use a grinder and do it by hand?

 

[rfjustin]

Use a grinder and do it by hand?

That's certainly possible. I'll chew on it for a while and see what shakes out.

 

[rfjustin]

Motor mount is scuffed up, tailcone installed, will remove centering ring in the morning and see how she looks.

 

[rfjustin]

 

[mrwalsh85]

That's certainly possible. I'll chew on it for a while and see what shakes out.

Not recommended by dentists...

 

[Theory]

Use a grinder and do it by hand?

soft enough that a pneumatic sander could also work.

lots of options : - ))

..

 

[thzero]

soft enough that a pneumatic sander could also work.

lots of options : - ))

..

A hand file!

 

[Imaknow]

soft enough that a pneumatic sander could also work.

lots of options : - ))

..

Makerspace and use the CNC?

 

[3stoogesrocketry]

It's aluminum. Hacksaw and hand file

 

[Theory]

didn't mean for this to turn into a "how to hand machine aluminum" thread... LOLz

 

[WILDMANRS]

How much nose weight are you calculating with the shorter booster

 

[rfjustin]

How much nose weight are you calculating with the shorter booster

About 2.25 lbs with a (3) grain 75mm L. This thing has a ton of base drag and likely wont even need that much nose weight.

 

[rfjustin]

It's aluminum. Hacksaw and hand file

Truth be told, that's likely where this is going to end up.

 

[rfjustin]

Aeropack is in there for the long haul and fits great!