Discussion in 'VDO' started by Eric1, Jun 8, 2013.
Ran about 70 of these yesterday. Took a few photos for Y'all.
Need any Beta testing?
What was the longitudinal pass all about? Looks like the tool moved but the lathe spindle wasn't running. It looks deeper than the surface you're leaving, unless you're doing two passes... but that seems unlikely with that machine and PVC in the chuck.
Ah! I was wondering how you made couplers for these. Makes perfect sense now.
For 3" and 4" thin-wall PVC pipe, I use LOC or Blue body tubes as couplers--they have the right OD to fit inside the PVC pipe. But turning down thick-wall pipe is classier. Hat tip.
Now you have to tell us what you do for PVC nosecones in these slightly oddball-diameter nose cones! (Mine are about the opposite of classy--they come straight from the sewer!)
Not Classy? I disagree!! They look like the Tank ammo. The old HEAT round has that very look!
Nose cones were a problem, so I made molds to cast them. I want to try thermo forming but I never did.
He is drilling holes around the circumference using the spindle as a "C" axis and a live tool in the tool changer.
Correct young Man.
Those rockets are pretty cool. Could you provide details on how to make them?
Rocketgeek: I'm happy to do a build thread next time I build one. They do tend to use larger motors than what's in your signature (I though L so far).
Eric: I have a question about adhesives for you. I use solvent cement to bond fin tubes (http://www.tapplastics.com/product/repair_products/plastic_adhesives/ips_weld_on_2007/133). This is easy to apply and has held up to the largest L motors I threw at it. I was talking to a friend about flying one on even bigger motors, and he suggested making the fins out of FG tube. My initial reaction was that it's difficult to bond PVC and FG, but then I thought of your rockets, and I think you have had good results binding FG and PVC with epoxy.
I wonder if you can elaborate on your experience bonding PVC and FG.
I use a screw through the tube and airframe into centering ring on my tube designs.
For the fin I use a mechanical cross lock the internal fillet ands Devcon plastic welder.
For external fillet I use either the devcon of Loctite for plastic epoxy.
Then I build a finish fillet of West and colloidial silica.
So does most of the strength come from the mechanical cross-locks and screws then?
Yes on the screws for the tube fins. The cross locks are about half of the structural strength for a standard fin.
In the middle of a move I've uncovered a Defender II that I bought several years ago. I have a few questions about the build that perhaps you previous BadAzz builders can help with.
I sent an email to Eric but he has discontinued the BadAzz website 8-(
Were instructions supposed to come with this beautiful bird? Does anyone have a source for instructions or a build session?
Unsure of how/where the recovery system is to be attached.
Ditto the launch lugs. I assume that they were to be epoxied on but I may use mini/micro rail buttons instead.
There are two extra holes in the tail cone, what are they for?
There is one longer bolt with a different size head, what is that to be used for?
What size head are the smaller bolts? .050", just haven't gotten out to the shop to dig that size hex wrench out.
And there is a piece of white plastic (1.5"x3"?), any idea what that's to be used for?
Thanks, Dave Cannell
This may help: http://www.jcrocket.com/defender-mkiii.shtml
Eric did a build thread to go with that rocket. I believe most of your questions will be answered here: http://www.rocketryforum.com/showthread.php?22864-BaddAzz-Rocketry-quot-Defender-MkII-quot
I love that rocket. The MkIII may head my list of OOP kits that got away.
That is a fantastic rocket - I have mine around here somewhere and it is one of my favorites. I missed out on the Mizz Rhonda - I held off for too long and by the time I was ready Eric had tossed in the towel. One of my two rocket regrets in waiting too long - the other was the Doppler Shift from GLR (although I think that its was basically a Vertical Assault with custom strakes).
I miss Eric's designs and service and hope that he is doing well (fully appreciating the dramatic change in his personal life, I don't blame him for pulling the plug).
1.Recovery is attached to holes in top centering ring about 1/4 apart. You are supposed to fish supplied kevlar through them & tie a small loop...... I found very difficult, so used paperclip to form loop through holes and attached cord to that.
2Lugs suck. come off too easy during thrust...use rail buttons.
3 One hole is for AT motors...... screw goes through hole and over edge of case.
2nd hole for CTI motors ...... use same screw... for different hole [one motor has thicker closure.]
So holes in tail cone are motor retention screw holes.
4 I think that one is for motor retention [tail cone holes]
5 white plastic gets cut into small wedge strips that go through slots in fin root edge, after placing fins in tube slots. Wedges go inside airframe into slots in fin,and couple drops glue on them to hold in place
How did this pop up from a year ago.....just realized I was addressing a year old post?
No idea. Strange things are happening.
This is some kind of sub-forum where it looks like all the banned vendor threads were sent. Look at the "VDO" subforum within the vendor section. It is full of Stickershock, Loki, Patel, etc. Looks like the previously impenetrable curtain has a few gaps in it for the new format.
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