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Mon Dec 29 13:28:48 2008 

Art Applewhite
Cinco 38mm
P.O.Box 294064
Kerrville, TX 78028
 
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SPECS: 6.0" x 11.0" - 4.2 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: 38mm G, H, I between 50-250 average impulse

Rating
(by [Featured Reviewer] Donald Besaw Jr - 10/09/07) Art Applewhite Cinco 38mm

Brief:
The Art Applewhite 38mm Cinco is a five sided pentagon shaped flying saucer with a 38mm motor mount. Like all other Art Applewhite saucers, this one is recovered using Art's aerobrake recovery.

Construction:
This kit came in one of Art's heat sealed thick plastic bags and included the following components:

  • 1 foamboard top
  • 1 foamboard bottom
  • 2 cardboard seams
  • 1 6 inch long 38mm motor mount tube

The instructions for this kit are very good and include actual assembly photos and text that is simple to understand. Make sure to read the instructions throughly before building.

This saucer is very easy to build and the building time is very short. Unlike Art's Delta Saucer line, this one does not include a center plate.

The assembly starts with cutting out the top, then you cut out the hole for the MMT tube. You will notice that there are two circles drawn here. You cut out the inner circle straight. The outer circle has to be cut out at an angle. Same goes for the bottom or the motor tube will not fit properly. The triangular launch rod hole is then cut out.

Now you flex the corners into shape. One thing I really like here is that Art has removed the material from the corners. This makes it much easier to flex the corners into the proper shape.

I then glued one of the seams into place. White glue is recommended here but I used epoxy instead and would recommend epoxy for construction, especially if you plan to fly this on an I motor.

It is then recommended that you spread a thin film of white glue into the edges to reinforce them.

That completes the assembly of the top.

The bottom is constructed the same as the top except there are two lines along the edge of the bottom. You cut out the bottom on the outer line and the inner line has to be cut at an angle so the bottom will fit properly against the top.

The motor mount and launch lug holes are cut out in the same manner as the top. The remaining seam is then glued into place, and like the top, white glue is used to reinforce the corners.

This completes the bottom. All that is left is to install the motor tube which I applied an epoxy fillet and then install the bottom and apply fillets in all areas where the top and bottom meet.

PROs: Builds very fast.

CONs: None.

Finishing:
This rocket really does not require any finishing due to the smooth finish of the white foamboard but if you wish to paint it, make sure you seal all exposed foam edges as some paint solvents will attack the foam. Trust me, I did a quick test by spraying some Krylon primer on a scrap piece of foamboard and watched as the Krylon ate right through it.

I left mine white as is and I think that was a good decision.

PROs: Finishing optional.

CONs: None

Construction Rating: 5 out of 5

Flight:
While Art does not recommend any specific motors for this rocket, he does recommend any 38mm G, H, or I motor with an average impulse of 50 to 250 newton-seconds average impulse. There certainly are a lot of options in that range.

The prep for this rocket couldn't be any easier. You just friction fit the motor and you're ready to go.

For my first flight, I loaded up an Aerotech 38/120 G67R reload. This turned out to be a great maiden flight motor. The Cinco took off straight and rather quickly under the small but bright Redline flame of the G67.

For the second flight, I loaded up an Aerotech 38/240 H123W reload. This was a really nice flight with the bright white flame, thick smoke cloud and loud roar of the White Lightning motor.

PROs: Flies great on a huge variety of motors.

CONs: None.

Recovery:
This rocket like all of Art's saucers uses aerobrake recovery. After motor burnout on both flights, the Cinco flipped over and aerobraked down at a rather slow speed and appeared to land softly but on the second flight, it landed in some nearly chest high (4+ feet tall) weeds which made me really glad I left it white or finding it could have been much harder or maybe even impossible.

Also, make sure to use short or medium delays with reload motors so the delay element can burn out before landing and make sure you do not add any ejection powder either.

PROs: Recovers quickly and easily.

CONs: None.

Flight Rating: 5 out of 5

Summary:
I really liked this saucer. It was very easy to build and flew great. I also noticed that it actually seemed to fly better than the Delta Saucer and didn't seem to oscillate in flight nearly as much as the regular saucers.

Also, if you add Art's optional "mustache" device, it will qualify as an acceptable NAR/TRA level 1 attempt rocket.

Priced at $30.00 with free shipping, I feel it's a bargain and Art will also throw in a free rocket for you as well.

Main PROs: Builds quickly and easily, flies great, and recovers easily.

Main CONs: I really cannot think of any.

Overall Rating: 5 out of 5


Rating
(Contributed - by John Lee - 03/08/08)

aaw_38mmCinco_sideviewBrief:
This is a simple 38mm high power saucer that incorporates an aerobrake recovery system. This was my Level 1 attempt. Since my club's field is fairly small, I wanted a high drag rocket that is hard to mess up. Naturally, I thought of Art Applewhite.

Construction:
The kit consisted of:

  • 2 marked foamboard shrouds
  • 2 glue strips
  • 38mm motor mount tube.
aaw_38mmCinco_parts1Also included was an easy to follow instruction sheet. The setup is basic but effective. Nothing else is needed. It should be noted that these kits have the needed grooves precut in them to aid in folding. This is a blessing. I suspect doing it one's self would prove VERY tedious and probably not result in as good a job.

In a radical departure from most other rockets where construction does not start with the motor mount. Instead, it begins with cutting out the top surface of the rocket. This is done on pre-marked and pre-grooved foamboard with the use of a straightedge and a razor knife. The cuts should be made slowly, using multiple passes and fresh blades. I changed blades after every two lines which was probably overkill but resulted in good cuts. When the upper body was cut out, I carefully folded it into shape and everything fit perfectly.

aaw_38mmCinco_topgroovedThe lower body starts out in almost the same manner but there are two lines around the motor mount hole and outer body. The outermost of these lines would be plumb cut. When those are straight, the razor knife is used to bevel the edge of the foam back to the second line. CHANGE YOUR BLADE BEFORE DOING THIS. This is the part I most worried about but I learned that using a fresh blade every couple of cuts yielded good results.

After the upper and lower bodies have been test fit, it is time to permanently fold them and glue their edged together. This is done using white glue and an overlap strip. I used some weights to hold everything in place as the glue set up.

aaw_38mmCinco_nakedWhen the upper and lower bodies are formed, white glue is used to filled the grooves. When the glue has set up, its time to make a dry run and fit everything together. If anything needs to be sanded into shape, now is the time to do it.

The 38mm motor tube is slipped into the upper body. The lower body is then slid into place and everything is checked for fit. If the bevel cut into the outer edges of the lower body do not fit flush against the upper surface, sandpaper is used to improve the fit. When everything fits, white glued is used to fix everything in place. Fillets of white glued are then used to reinforce all intersections. I would use the glue to seal the exposed foam edges of the rocket as well.

  • PROS: easy high power build, no special tools, grooves in the foamboard are already cut.
  • CONS: none

aaw_38mmCinco_topviewFinishing:
Finishing on this rocket was done very gingerly even though it was still conducted in my patented ham-fisted style. The instruction warns about the dangers that spay solvents pose to foam and I took these warnings seriously. Unfortunately, every primer I tried on a piece of scrap attacked the foam. My solution was workable but took lots of time and paint.

I sealed the edges of all foam with white glue and gave a thin coating of the same glue to both surfaces of the rocket. It was a very light coating. I waited for the glue to dry and harden, then took out the Krylon® primer. I gave the rocket a total of about 12 coats, if you want to call them coats. Essentially, each pass was a very light dusting. The hope was that there would not be enough solvent to soak in and that the solvent would evaporate quickly. In time, the thin layers built up a more protective layer to insulate the foam underneath. It seemed to work. The process was done first on the bottom and then repeated on the top.

When the primer was dry, I masked the entire upper body and sprayed the lower body red. I used light coats but they were not excessively light. My supposition is that the primer idea worked because there were no problems.

For further finishing, I found a jpg of the famous Jaws image on the web. I then opened it in photoshop and resize it such that the shark image was maximized in the space of a single panel of the rocket. After that, I printed 5 copies on decal paper and applied the decals, one on each face. I used a razor to try and fit at the corners but my hand was not steady enough for a great job. I wound up using an aqua colored Sharpie to fill in the white spaces. The result is not very noticeable. A coating of Future Polish finished the rocket.

  • PROS: no finishing is needed but it can be finished in any sort of wild pattern, limited only by the imagination
  • CONS: none.

Construction Rating: 4 ½ out of 5

aaw_38mmCinco_onthepadFlight:
Any 38mm motor can be used. I used a reloadable Aerotech H73-JM because it gave the longest burn of the motors available to me and I like the smoke trail.

Assembling the reload was the only real problem. A lot of the pieces had a tight fit. Even so, with some judicious shaving and peeling, the motor was put together and inserted into the rocket. A twiggy igniter was used in preference to the provided igniter and the rocket was ready to go.

It ascended off the pad on a column of dense black smoke. It roared all the way, reached apogee and inverted and began to descend the way it was designed using aerobrake recovery. About a hundred feet up, the ejection charge deployed the moustache streamer to make the NAR people happy. There was a slight dent in one corner. Other than that, it worked fine and I am now a Level 1!

aaw_38mmCinco_nicerecoveryRecovery:
Almost all of Art's rockets are designed to use aerobrake recovery. This one is no exception. Since it is so dependable, some people higher up the food chain in the NAR and TRA object to its use for certification flights. Accordingly, new rules have been promulgated requiring active recovery.

To meet this requirement, an additional 38mm tube was added to the front of the rocket bearing a fiberglass streamer. This is called the moustache. It deploys as streamer, works well, is absolutely unnecessary and looks bloody silly. The one I have has a picture of the Mona Lisa on it. Sitting on top of the Jaws themed rocket, it is easy to see why Mona Lisa lost her smile. I will not be using the moustache again.

For what it is worth, if the idea is to make certification complicated, why are single use motors allowed?

Flight Rating: 5 out of 5

Summary:
This is a great HPR for small fields. It is easy to build and easy to recover. That makes it dependable.

Overall Rating: 5 out of 5

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[Enter Flight Log]           Don't see your recently submitted flight log? Click Here
Date Name Motor Ejection/
Altitude
Wind Notes
10-06-2007 Donald+Jr Besaw AT RMS G67-0 None - Tumble 10+ mph winds - Great first flight, nice red flame from the G67R, great little motor. Landed close by. No damage.
10-06-2007 Donald+Jr Besaw AT RMS H123-0 None - Tumble 10+ mph winds - Very nice second flight, nice bright white flame and thick smoke cloud from the H123W. I had a moderate walk through nearly chest high weeds to recover this one. No damage.
11-03-2007 Donald+Jr Besaw AT RMS I161-0 None - Tumble 5-10 mph winds - Awesome flight, very quick off the pad. Huge flame, thick smoke cloud and loud roar from the I161W, excellent motor for solidly built 38mm oddrocs. No damage.
12-06-2007 Donald+Jr Besaw AT RMS G61-0 None - Tumble 0-5 mph winds - Excellent flight after a rather slow ignition of the G61W, smoked for a few seconds before it fully pressurized and lifted off. Almost hit me on landing. No damage.
02-12-2008 Donald+Jr Besaw AT RMS G69-P None - Tumble 0-5 mph winds - Excellent flight, first time I used the G69N endburner, great motor, nice steady 2 second burn. Higher than a normal G flight as this motor delivers 137 N/s. Tumbled down during recovery. No damage.
05-03-2008 Donald+Jr Besaw AT RMS H123-0 None - Tumble 5-10 mph winds - Excellent flight. Flew straight up and actually aerobraked in reverse. No damage.
09-24-2008 Donald+Jr Besaw AT RMS G67-0 None - Tumble 10+ mph winds - Great flight, love that G67R, loud, powerful, bright red flame. No damage.
10-04-2008 Donald+Jr Besaw AT RMS G69-P None - Tumble 5-10 mph winds - Great flight on the G69N EB, I really like this motor, Landed close by. No damage.
10-11-2008 Donald+Jr Besaw AT RMS G69-P None - Tumble 0-5 mph winds - Another great flight on the G69N EB, tumbled down on recovery. No damage.
10-21-2007 Mark Kulka Ces RLD G69-3 Just Past (1-2sec) 5-10 mph winds Event: SEIYGE-3, Johnstown
440-Sixpack - Very LOUD straight-up boost to around 250-300 ft. Flipped over at apogee and recovered via aerobraking. Slow, gentle descent despite its size. Recovered about 25 ft. from pad, without a scratch.
03-08-2008 John Lee AT RMS H73-M Very Late 5-10 mph winds Event: Monthly Launch
Sky Shark - Ejection of streamer was a joke; it was uneeded and silly but makes NAR happy Cert Flight: L1
05-10-2008 John Lee Ces RLD H153-P None - Tumble 0-5 mph winds Event: Alamo Rocketeers Monthly Launch
Sky Shark - Great noisy flight
 

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