
(Contributed - by Bill Eichelberger
- 04/01/04)
Brief:
With more and more old rocketeers rediscovering the hobby and Estes seemingly
intent on remaining a shadow of its former self, it was only a matter of time
before other, more BAR friendly companies arrived on the scene to fill the
void. One of the more recent of these companies is Semroc. More
"experienced" fliers will recognize the Semroc name from their brief
stint in the rocketry world 30+ years ago, but it would be a mistake to think
of them based on this alone. The new Semroc is a self contained model rocketry
history lesson, with planned offerings from as far back as Orville Carlisle's
1957 Roc-A-Chute Mark II and from long lost companies like Model Missiles,
Flight Systems, Canaroc, Rocketry Development Corporation, Centuri, and their
own Semroc products. (They even have a token Estes kit, the Sky Hook from the
Astron days.) Like many others, when the new Semroc lineup of rockets was
announced a few months ago, I quickly put the Laser X at the top of my
"can't wait to build" list. While the Laser X project turned out to
be an enjoyable one that produced a great looking rocket (despite my efforts to
the contrary), I was surprised to find that I enjoyed building the Astro-1
quite a bit more. I had always assumed that the Astro-1, a stocky, sturdy, 3FNC
rocket, was in the same ballpark as the Estes Alpha from a size standpoint, but
I was surprised to find that it was considerably bigger than it's Estes
counterpart.
Construction:
The kit contains:
- ST-1095 body tube
- ST-730E engine tube
- BC-1052 nose cone
- FV-30 laser cut fins
- 2 CR-710 centering rings
- TR-7 thrust ring
- LL-122 launch lug
- EH-28 engine hook
- SE-10 screw eye
- EC-124 shock cord
- SCK-24 Kevlar®
cord
- RC-12 parachute
- TD-6 tape discs
- SLT-6 shroud line
- DKV-30 decal
The Semroc version of the Astro-1 comes in the traditional hanging bag with
the parts clearly visible through the bag back. The instruction booklet doubles
as a face card and inside the instruction sheet, one finds a mini-history
lesson on both the rocket and the company that originally produced it,
something I consider a nice touch. There's also a well detailed assembly guide
and an exploded view of the rocket (in a "centerfold" that only a BAR
could love.) The parts are nicely done and include what has become a
staple of late; laser cut fins and a Kevlar®-based
shock cord system. The fin sheet is the most impressive part of the unbuilt
kit, almost an art piece unto itself with the laser etched Semroc logo and kit
name. The balsa itself is fairly hard, shapes easily, and needs little in the
way of cleanup after removal from the spar. Overall the feeling of quality
permeates this kit and the three other Semroc offerings that I've built. The
rocket is a legitimate skill level one project with the most complicated step
in the instructions being the installation of the motor mount and Kevlar®
shock cord, not a step likely to cause a panic attack even in a beginner. After
this is completed the project is a simple 3FNC build and it progresses quickly,
but I did things a little backward for a change.
Finishing:
Following the advice of a fellow OldRockets poster, I sprayed the body tube
with a coat of Valspar primer before I attached the fins or started the sealing
or sanding process. Theoretically this was supposed to toughen the body tube
for the sanding process. Turns out it works. Even at the top of the body tube
where I had become accustomed to some fraying the tube held together well. The
primer was followed by the requisite two coats of thinned Elmer's Fill 'n'
Finish with each coat followed by a brisk sanding with very fine grit
sandpaper. Not only did this hide any tube spirals, it also roughened up the
body tube and gave the fins a little more to bite onto once they were glued in
place. The fins were attached using the double glue method using Elmer's Wood
Glue and were also finished as the body tube was with Fill 'n' Finish. After
the fins were sanded, the entire rocket was re-sprayed with primer, then with a
base coat of ValSpar gloss white. Once dry, the fins were masked and sprayed
with ValSpar Cherry Red, while the nose cone was sprayed with ValSpar gloss
black. After a light coat of acrylic clear the decals were applied. They went
on with ease and nicely completed the look. Once everything was dry I applied
another coat of clear and called the project finished.
Construction Rating:
5
out of 5
Flight:
The first launch was a rarity, a Leap Day launch, but that fact passed me by
until that evening when I was entering the flights into the flight log. Like I
said earlier, I expected the Astro-1 to be much like the Estes Alpha in it's
flight characteristics, but as it turned out, I liked it even better. For the
size of the field I was flying on, the Astro-1 is tough to beat. The added size
cuts down on the height while making the whole flight visible. Flying on a
B6-4, the rocket flew to a respectable height and managed to recover on the
field despite the full chute and constant breeze. Having proved it's small
field worth, I looked forward to a chance to try it out with a C engine on a
big field. A month later I finally got around to launching it on the big field
at VOA with the Cincinnati Quark group. Since I had a lot more room to work
with, I loaded up a C6-5 and let 'er rip despite the relatively heavy breeze.
The Astro-1 arced into the wind and flew to a nice altitude with ejection
coming right before apogee (so a C6-7 might have been a better choice.) Again
under a full chute, the rocket began drifting with the wind to the northwest,
well away from our launch site. From where we stood it looked like it might
land near the park's edge, so I decided to drive to the landing site instead of
plowing through the thistles and swampy spots that lay between me and the
rocket. I drove to the site and began walking along the sight line, but found
no rocket. Thirty minutes later I disappointedly decided that I had indeed been
beaten, but on the drive back I realized that the row of cars I had been using
as a point of reference were not parked on the Quark flight line, so I decided
to try again. Again nothing, so then I really gave it up. Apparently that was
what did it. I hadn't moved the van 100 feet when I saw the Astro-1 hanging
from a thistle a mere 25 feet from the road, but completely on the opposite
side of the access road. I guess the drift only looked extreme from where I
stood because I was a good 1/4 mile away from where I had been searching.
Flight Rating:
5
out of 5
Summary:
PROs:
- Great flier with a range of engines that make it a good choice for fields
of varying sizes.
- Classic simplicity of the paint and decal scheme produce a great looking,
uncluttered kit.
- Updated version of a classic beginners kit.
CONs:
Overall Rating:
5
out of 5