I guess I can say I've started the build:





I said before that the Estes Sizzler has a 9" BT-20; actually, it's a bit short, but the Estes Hi-Flier does. The only thing I'm short of is the nose cone... nobody makes a PNC-70 equivalent, with Moldin' Oldies offline at the moment. Semroc has a balsa cone the same shape, or close enough, but I have no idea how much nose weight to use to be equal to the modeling clay packed with the original Vulcan.

I have a page about this build:

http://rocketry.newcenturycomputers...lackvulcan.html

Yes, I posted most of this in the other thread, but I'm not looking for plans anymore, I'm building the darn thing!

... and I can hardly wait to fly it already ...

__________________
NAR # 115523
Once upon a better day... SAM #0076
My site: http://rocketry.gonnerman.org

I built it last night. Well, mostly:



I'm pretty happy with it. I do wonder, now, how I ever got it together when I was a kid 25 years ago building the original.

__________________
NAR # 115523
Once upon a better day... SAM #0076
My site: http://rocketry.gonnerman.org

I was expecting a brotha with the ears...

I know, different time, different space!

JK!

Looks good!

__________________
Glen A.
N.A.R. #26298 L1

I've built a second, using the Fliskits "Midnight Express" paper rocket pattern to supply the body tube, nose cone, and thrust ring; that model's airframe is entirely made of 110# paper. For both rockets, I used BB's for nose weight, with epoxy in the plastic nose cone of the first one and yellow glue in the second. Since the yellow glue shrinks, I did it a layer at a time, about 4-6 BB's and some glue; the last layer is toilet paper soaked in yellow glue. I glued a safety pin into each, head toward the point, to serve as a lug.

I also reinforced the "points" on the fins with CA... they are pretty tough now. I'm looking forward to launching both as soon as the weather straightens out.

__________________
NAR # 115523
Once upon a better day... SAM #0076
My site: http://rocketry.gonnerman.org

Well, Sunday I launched my Black Vulcan for the first time, on a C6-3 engine. It was not the flight I was hoping for, though, with the butt of the rocket swirling in a helical pattern all the way to engine burnout. I have read about Vulcans "tailwagging" on the way up, but I don't remember that my original Centuri Vulcan did that.

Looking at the rocket, I notice that the angle of the body during the tailwagging incident is about the same as the angle of the launch lug on the body. So I have retrofitted my rocket with a launch lug near the nose cone, embedded in the body, and a hole in the aft bulkhead that aligns with that lug. This way, the rocket can track straight up the rod rather than proceeding at an angle.




Hopefully this helps.

__________________
NAR # 115523
Once upon a better day... SAM #0076
My site: http://rocketry.gonnerman.org

Okay... that looks... SWEET! Really! I was going to do one up in color but now I think I'll go Gray-scale. Nice work.

I modded my X-24's with the same launch lug arrangement. Much better take-offs.

__________________
John Adams
"There is a lot of rocketry under 20ns"

I've flown my Black Vulcan twice more since the mods; you can find links to the launch reports on my fleet page here:

http://rocketry.newcenturycomputers...tml#blackvulcan

__________________
NAR # 115523
Once upon a better day... SAM #0076
My site: http://rocketry.gonnerman.org