
(Contributed - by
Dick Stafford - 03/22/03
)
Brief:
Art has continued to expand his line of saucers, adding a 12-inch saucer with a
38mm motor mount and either a 1/4-inch launch lug or optional ACME conformal
rail guide. The recommended motors include the Ellis Mountain H48, all Aerotech
38/240 RMS, and all Cesaroni Pro38 one and two grain motors. This kit would
serve nicely as quick, easy, and inexpensive way to Level-1 certification. Add
a 29-38 adapter (not provided or recommended by the manufacturer) and you could
add G80s and G125s to this list.
Construction:
The parts are all good quality and include:
- Six sheets of colored, 110 lb card stock comprise the top, bottom and core
assemblies
- One sheet of pre-marked, foam poster board to make the center plate.
- One thick walled 38mm motor tube
- 1/4-inch launch lug
- 3-inch x 8-inch x 3/32-inch basswood fin stock
- 1 7/8-inch self-adhesive, fiberglass drywall joint tape
Tools and materials required:
- Scissors
- X-acto knife
- Elmers white glue
- Devcon® 2 Ton Epoxy ($1.97 at Walmart)
- Clear enamel (RUSTOLEUM Crystal Clear or equivalent)
- Fine sandpaper
There are six pages of detailed instructions with plenty of diagrams. White
glue is first used to assemble the top and bottom cones and two cylindrical
core assemblies (after a substantial amount of clipping with sharp scissors, of
course). The bottom core must slide over the top core so it is test-fit before
gluing. Unlike its smaller cousins, the saucer uses a foam board sheet in place
of the plastic plates used in Arts smaller saucers. The lines for the
circular cuts are all pre-drawn, and you really need a new, sharp blade to make
the cuts. There is also a circle drawn just inside of the outer rim. You cut
through just one side of the foam circle and form a bevel on the outer edge.
Some sanding is required to clean up this piece, and you must test fit it with
the top and bottom cores before gluing. It took some effort and sanding for
these components to fit together.
Art also provides strips of self-adhesive,
fiberglass drywall joint tape to reinforce the top cone. Although the
instructions say this step is optional, it is required for H flights and the
only recommended G motors are the Cesaroni one grainers. I recommend you use
the tape even if you only plan to fly on Gs. It doesnt add that much
weight, but makes the saucer far more sturdy. Anyway, rockets tend to like to
eat the largest motor that they can.
Once everything fits, you spread epoxy inside all the sub-assemblies, slide
them together, and clamp them by placing a suitably sized bowl on top. To
prevent bleed-through on the cardstock, I suggest you use the Devcon® 2-ton
epoxy recommended in the instructions.
The fin can assembles with white glue (I used carpenters glue for
this step) like any other set of fins. The basswood fin stock is nice and easy
to work with. Finally, the fin unit is glued in place, completing the assembly.
Finishing:
Since it is winter and painting must me kept to a minimum, I sealed the fins
with Fill-and-Finish and hand-painted the fin can black. As recommended, I
sealed the pre-colored cardstock with clear enamel.
Construction Rating: 4
½ out of 5
Flight:
I flew the saucer on a Cesaroni H153, with the ejection charge removed. To hold
the motor in on decent, I simply used a couple of wraps of masking tape around
the motor's thrust ring and the rear of the motor mount.
Man, this saucer really scooted on this motor, flying arrow-straight to an
impressive altitude. I was speechless and the crowd clapped. The saucer fell
bottom first most of the way, but started to tumble just before it landed.
There was no damage.
Note: This rocket also comes in the "Texas Special" design as seen
above.
Flight Rating: 5
out of 5
Summary:
The saucer was easy to build but it took some effort to get the components to
fit prior to final assembly. In all, it was just a tad more challenging than
Art's smaller saucers.
This saucer gave a truly exciting flight. And for a $30, mostly paper, L-1
saucer - not bad at all!