FerdBerful
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This is a continuation of my previous build thread: Level 3 MadCow Super DX3: No Fiberglass, No Carbon Fiber, no sweat ... ?
https://www.rocketryforum.com/showt...er-DX3-No-Fiberglass-No-Carbon-Fiber-no-sweat
The actual build with pictures in the above link starts on the second page (post #41):
https://www.rocketryforum.com/showt...-No-Carbon-Fiber-no-sweat&p=650205#post650205
Well, after ~ 2 1/2 years fallow, I've restarted work on my extreme kit bash of a Madcow Super DX3:
recently christened "Leapy McWonder Woody"
I've been working on it for a few weeks and taken some pictures.
Above shows the completed external "cage" (on the right.) The "centering" rings
alternate 10 ply 1/4" plywood and 1/4" solid walnut plywood. The vertical pieces
between the rings are 10 ply 1/4" plywood.
In the middle of the picture is a standard 36" Super DX3 body tube. And on the left is
several Madcow couplers glued together. These slip into the body tube for (hopefully)
overkill strength.
Above is the completed 75mm motor tube assembly. The 36" body tube with couplers
slips over the top half of the motor tube assembly. The body tube will come down to the
middle double-wide walnut centering ring. This will leave the part showing in the first
picture exposed to the breeze.
Above is the transition for between the 4" body tube section an the 3" motor tube section.
I wanted to make sure that the shock cord/drogue chute wouldn't get hung up on the step
when I am loading them. Space will be tight, so I need make use of the top part of the motor tube.
Above is a 4 braid of 1500 lb Kevlar cord. (You can see a 3 braid of 2000 lb
Kevlar in the right transition picture above.) It's kind of irrationally, but standard
rocket Kevlar shock cords seem "too expense". So I Google'd around looking for
something cheaper. Turns out Kevlar rope, etc is expensive. However, I found
1500 lb and 2000 lb cord that is a little bit more reasonably priced. So I've been
braiding it to the size I want. It takes a while to do, but it like knitting;
something you can do while your mind is otherwise occupied.
I recently decided that a plastic nosecone won't do. So I got some 13 ply 3/4" birch plywood
so I could create a wooden one. Can you say "69 ply nosecone?"
The first thing I did was create a profile. I put the plastic nosecone in a body tube and held
the body tube down with my "box-o-lead-shot". I used a jerry-rigged ... well see the picture.
I traced around the nosecone to make a pattern.
Above is the nosecone blank with the pattern overlayed.
The blank started out really heavy.
But after some freehand hacking at the table saw, it's not quite as bad.
The blank is not glued up yet and I will be cutting out the interior so that the walls
of the nosecone are ~ 5/8" thick. I'm guestimating that it will be under 2 lbs when
finished, but who know.
More to come when I have some more progress to show.
https://www.rocketryforum.com/showt...er-DX3-No-Fiberglass-No-Carbon-Fiber-no-sweat
The actual build with pictures in the above link starts on the second page (post #41):
https://www.rocketryforum.com/showt...-No-Carbon-Fiber-no-sweat&p=650205#post650205
Well, after ~ 2 1/2 years fallow, I've restarted work on my extreme kit bash of a Madcow Super DX3:
recently christened "Leapy McWonder Woody"
I've been working on it for a few weeks and taken some pictures.
Above shows the completed external "cage" (on the right.) The "centering" rings
alternate 10 ply 1/4" plywood and 1/4" solid walnut plywood. The vertical pieces
between the rings are 10 ply 1/4" plywood.
In the middle of the picture is a standard 36" Super DX3 body tube. And on the left is
several Madcow couplers glued together. These slip into the body tube for (hopefully)
overkill strength.
Above is the completed 75mm motor tube assembly. The 36" body tube with couplers
slips over the top half of the motor tube assembly. The body tube will come down to the
middle double-wide walnut centering ring. This will leave the part showing in the first
picture exposed to the breeze.
Above is the transition for between the 4" body tube section an the 3" motor tube section.
I wanted to make sure that the shock cord/drogue chute wouldn't get hung up on the step
when I am loading them. Space will be tight, so I need make use of the top part of the motor tube.
Above is a 4 braid of 1500 lb Kevlar cord. (You can see a 3 braid of 2000 lb
Kevlar in the right transition picture above.) It's kind of irrationally, but standard
rocket Kevlar shock cords seem "too expense". So I Google'd around looking for
something cheaper. Turns out Kevlar rope, etc is expensive. However, I found
1500 lb and 2000 lb cord that is a little bit more reasonably priced. So I've been
braiding it to the size I want. It takes a while to do, but it like knitting;
something you can do while your mind is otherwise occupied.
I recently decided that a plastic nosecone won't do. So I got some 13 ply 3/4" birch plywood
so I could create a wooden one. Can you say "69 ply nosecone?"
The first thing I did was create a profile. I put the plastic nosecone in a body tube and held
the body tube down with my "box-o-lead-shot". I used a jerry-rigged ... well see the picture.
I traced around the nosecone to make a pattern.
Above is the nosecone blank with the pattern overlayed.
The blank started out really heavy.
But after some freehand hacking at the table saw, it's not quite as bad.
The blank is not glued up yet and I will be cutting out the interior so that the walls
of the nosecone are ~ 5/8" thick. I'm guestimating that it will be under 2 lbs when
finished, but who know.
More to come when I have some more progress to show.
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