Jeff L's unbaked design thread

[Jeff Lassahn]

Thinking about making a two stager roughly modeled after the old Astron Avenger. I was never happy with the look of the fins on the sustainer, so I've been messing with different separation lines.

 

[Hobie1dog]

looks cool

 

[Jeff Lassahn]

Another "messing around with a classic" design I did a while ago.
I've never really liked the Big Bertha, the lines feel kind of clunky to me. So I was playing with it to figure out why. This is what I ended up with, kind of an Art Deco thing.

 

[jqavins]

Very V2esque.

 

[Jeff Lassahn]

Just noticed that minimum diameter 18mm to 13mm two stage rockets tend to look like real sounding rockets:

And if you fly it with A8-0 to 1/2A3-4 it looks like it goes about 150m, which might mean you could find it again afterwards.

Or do C6 to 83, go above 400m and wonder what happened.

 

[mbeels]

That'd be fun. You could even try a 24mm -> 18mm -> 13mm (C11, A8, 1/2A). Like the BB XII.

 

[BABAR]

Just noticed that minimum diameter 18mm to 13mm two stage rockets tend to look like real sounding rockets:
View attachment 612578
And if you fly it with A8-0 to 1/2A3-4 it looks like it goes about 150m, which might mean you could find it again afterwards.

Or do C6 to 83, go above 400m and wonder what happened.

With an adaptor you can sub an A10-0 for the A8. Lower cost, lower weight, win win

https://www.rocketreviews.com/compare-estes-a8-to-estes-a10t.html

 

[cwbullet]

Very V2esque.

My thoughts exactly.

How did I miss this since July?

 

[Jeff Lassahn]

flying broomstick.

 

[cwbullet]

flying broomstick.
View attachment 612975

That is one I would love to have a rocksim or ORK file for. I would 3d print that.

 

[neil_w]

That is one I would love to have a rocksim or ORK file for. I would 3d print that.

If you do then you gotta design some appropriate texture into the brush.

 

[BABAR]

If you do then you gotta design some appropriate texture into the brush.

Wondering if a cheap grass skirt would work? Maybe not, as the cone flare would spread the fibers.

Using real straw would be a PITB.

 

[cwbullet]

Wondering if a cheap grass skirt would work? Maybe not, as the cone flare would spread the fibers.

Using real straw would be a PITB.

It probably would with rings to keep the shape.

 

[jqavins]

Witches' brooms are frequently made from twigs, not straw, and might not really be so hard. (Maybe I could even whip one up by Saturday. Hmm.)

 

[BABAR]

4 low power and one high power, $8.49 plus tax
https://www.walmart.com/ip/NUOLUX-5...Accessory-Straw-Color/1633958243?from=/search

 

[BABAR]

Witches' brooms are frequently made from twigs, not straw, and might not really be so hard.

It is both amusing and disturbing that you know this. Yeah, call me politically incorrect.

 

[mbeels]

It is both amusing and disturbing that you know this. Yeah, call me politically incorrect.

Apologies for the tangent, but does anyone know the stories of Baba Yaga? A witch that lives in a hut that walks around on chicken legs (called Izbushka) looking for bad Russian children to cook in her stew? She flies around in a mortar that she drives with a pestle, and uses a broom to sweep up the tracks behind her. Happy little children's bed time stories they aren't.

 

[boatgeek]

Apologies for the tangent, but does anyone know the stories of Baba Yaga? A witch that lives in a hut that walks around on chicken legs (called Izbushka) looking for bad Russian children to cook in her stew? She flies around in a mortar that she drives with a pestle, and uses a broom to sweep up the tracks behind her. Happy little children's bed time stories they aren't.

Sounds more or less like the original Brothers Grimm. My grandma sent us a book of the original Grimm stories for our kids when they were young. We took a look through and quietly put the book in the donate box. We didn't need the nightmares.

 

[jqavins]

Gee, I'd have put it away for later. But yeah, the Grimms were pretty grim. (Sorry.)

 

[Jeff Lassahn]

That is one I would love to have a rocksim or ORK file for. I would 3d print that.

Here's an 18mm version, it needs a little nose weight but nut much.

 

[mbeels]

Curious, are you open to non-standard nose cones? I bet it would look more broomstick like with a half-dome cone.

 

[BABAR]

Launch lug placement is gonna be a real witch!

Option might be a pass through the fin can right next to the main tube (broom stick.) I used something like this on Tank Killer, which used a toilet tank ball float as a nose. It really helped that I was able to connect the forward and aft holes in the float with a soda straw, so the rod when threaded through the aft hole was guided right to the forward hole.

 

[DaHabes]

Launch lug placement is gonna be a real witch!

Option might be a pass through the fin can right next to the main tube (broom stick.) I used something like this on Tank Killer, which used a toilet tank ball float as a nose. It really helped that I was able to connect the forward and aft holes in the float with a soda straw, so the rod when threaded through the aft hole was guided right to the forward hole.

Use a fly-away rail guide and mini buttons...

 

[jqavins]

It would have to be a fly-away rail guide with a stand-off distance. If you know where to get those, please do tell, as I need that for a different rocket. I've been expecting I had to design and make it.

 

[DaHabes]

It would have to be a fly-away rail guide with a stand-off distance. If you know where to get those, please do tell, as I need that for a different rocket. I've been expecting I had to design and make it.

Yes, it would have to be a custom design. If I could ever bring my skills up to par, I would build a OpenSCAD customizer to create such. Alas, so much to do, so little time...

 

[mbeels]

Orrrrrrrr..... do something ridiculous, like make a clip-on dust pan attachment that can provide the launch lugs, or flies away like a rail guide.

 

[BABAR]

Ignorant people (in this case me, regarding 3D printers) often make ridiculous suggestions, but what the heck.

if you were to 3D print the whole fin can unit, how hard would it be to

1. include a pass through launch lug in the design (as a minimum, lined up holes at forward and rear ends, you can connect them with a straw later)

2. Implement @neil_w ‘s suggestion of texturing the outer surface with @jqavins ’s twigs?

???? @cwbullet ???

 

[BABAR]

Orrrrrrrr..... do something ridiculous, like make a clip-on dust pan attachment that can provide the launch lugs, or flies away like a rail guide.

View attachment 613347

oooooooh, a parasite glider! I LIKE it! You can name the sustainer “Broom” and the glider “Hilda.” Time for @Rktman to chime in!

 

[jqavins]

Ignorant people (in this case me, regarding 3D printers) often make ridiculous suggestions, but what the heck.

if you were to 3D print the whole fin can unit, how hard would it be to

1. include a pass through launch lug in the design (as a minimum, lined up holes at forward and rear ends, you can connect them with a straw later)

2. Implement @neil_w ‘s suggestion of texturing the outer surface with @jqavins ’s twigs?

???? @cwbullet ???

Number 1: easy.
Number 2: easy to print, possibly a PITA to design.

 

[Jeff Lassahn]

Thinking about things that are Space-Shuttle-like (i.e. vertical launch stage-and-a-half to orbit space planes) but have different looks.
Here's a classic mid-century design...