What did you do rocket wise today?

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Saw a thread on YORF where they discussed rockets by Pitsco and Estes where you have to build your own body tube and remembered I had this in the build pile:
0915191553.jpg
So of course I had to build it.

Cardboard mandrel for shaping body tube:
0915191602.jpg

Motor mount
0915191603.jpg

Recovery gear rigged to Jadebox's method I learned today:
0915191701.jpg

Cardboard fins cut out and aligned and tacked on:
0915191601.jpg

Fins and launch lug filleted, motor mount glued in:
0915191746.jpg
The tube was constructed by taking a piece of regular copy paper and convolutely gluing it to itself on the mandrel, then taking one strip of the orange wrap, wetting the adhesive backing with a damp sponge, and doing a right hand spiral, butting the seams together. Follow with a second piece doing a left hand spiral.
My kind of rocket. No filling, sanding, primer or paint.
An interesting build exercise, but I see why this was probably not a big seller.
More of a niche product for the educational sector.
Easier to just sub a bt-50 tube.:D
I can cut quite a few bt-50 couplers from the mandrel though. I think it's long coupler tubing.
Anyway the discussion thread is here:
https://www.forums.rocketshoppe.com/showthread.php?t=18068&page=1&pp=10
hcmbanjo's build thread is here:
https://modelrocketbuilding.blogspot.com/search/label/Tech-Pak
AC Supply still sells this:
https://www.acsupplyco.com/estes/estesmain.htm
Laters.
 
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My 3D printed sidewinder acted more like a missile than a rocket this weekend.



I'm sure the issue was the last-minute switch from an Aerotech E30 to an Estes E12. The extra weight and the fact that it hung about 1" out the back surely shifted CG towards the aft.

The rocket was mostly unscathed, and even if it was damaged, its easy to print replacement parts.
IMG_3154.jpg
 
Here's the thrust curve right after ignition for the E30:
upload_2019-9-16_8-23-37.png
And here for the E12:
upload_2019-9-16_8-24-34.png
The E12 is giving you way less speed off the rod. I'd look to that for the cause of the horizontal flight before the CG shift.
 
The last minute swap was due to the fact that I buggered the igniter that came with the E30, and neither I nor anyone else at the launch had spares small enough to fit in the tiny nozzle.

I looked in my launch box and found a E12 and an e-match. And then Go Fever took over.
 
The squirrel rocket is underway. After the Shenzhou, this one is an easy and fun build. Maybe I'm just putting of the WAC Corporeal, which looks pretty intense. Or perhaps it's all for the squirrels? In any case, I love the MASSIVE acorn nose cone.

IMG_7979.JPG
 
Does this seem like a lot of fire for an Estes BP C6-3?
Friends' Scratch build on it's 2nd flight.
X wing C6-3.jpg
 
I wonder if we can scale that with one of our own rockets ie. Estes Shuttle and a car.... hmmm :rolleyes:
images
upload_2019-9-17_9-59-23.jpeg
 
The rain has returned to the Jet City :( I've got 10 rockets waiting to be painted and launched. I'll take advantage of every sunny weekend to come but it's looking like the days of being able to work nonstop have come to an end.
 
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