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REV 2.4 - Tue Aug 17 08:36:22 2010

OOP
Holverson Designs
Zoomie
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SPECS: 6" x 8.375" - 0.2 oz
ROCKSIM FILE: MISSING - please submit here
SpaceCAD FILE: MISSING - please submit here
REC'D MOTORS: 1/2A3, A3

[Picture] (05/01/99) I purchased the Holverson Designs' Zoomie™ from Apogee Components with an order of motors. It is my first boost-glider.

Zoomie™ is 6" long with a little over an 8" wing span and flies on mini (13mm) motors. It is a boost glider because it ejects a portion of the rocket while the remaining portion glides to earth. In the Zoomie's™ case, it ejects the motor casing.

CONSTRUCTION:

The kit includes an 11x17 instruction sheet printed on both sides, a laser-cut balsa sheet with the four wing pieces, a 2" long body tube, a 2" long launch lug, a short, balsa nose cone, and a small piece of clay.

The instructions were very clear and thoroughly illustrated. I really want to emphasize that. In fact, Holverson comments, "This instruction sheet is laid out to allow you to start a rocket plans reference file. Save your entire set of instructions for future reference." The instructions cover building, finishing, trimming and flying of the Zoomie™. They also tell a little bit about boost gliders as defined by NAR.

Assemby is very easy but takes a little time to ensure the wings are built properly. During assembly of the wings a small square is good to have to ensure the wing tip is at a 90° angle. The instructions are very good here indicating the need for pins to hold while drying.

I have read about a glue technique that was used for the build of the Zoomie™, however, this was the first time I used it. That is a double-glue technique. First the edges that are going to be glued together get a light coat of white glue and then are allowed to dry. Then they are coated again and assembled. It is to "increase the strength of the joint." according to the instructions.

The only part that I had some difficulty on was the sanding the joint of the wings. With the wing tips assembled, each wing looks like a "L". With both wings laying on the table as they would be assembled, the joint is to be sanded to allow them to adjoin flushly. This is done by sanding until it is perpendicular to the table. Doesn't sound hard but I had some trouble and had to take several shots at it. Only advice I have is to go slow.

I didn't really "finish" the Zoomie™ although the instructions gave good information for sanding, sealing and painting. I hit mine with some fluorescent green paint. It really made it very visible.

Overall, for CONSTRUCTION I would rate this kit 4 points. It is easy to build on its own, however, with excellent instructions . . . it's a snap.

FLIGHT/RECOVERY:

I practiced on three separate occasions trimming the Zoomie™ in the back yard and did as the instructions said. Then one day I went to the field for the flights. I tossed it there and found that I had to trim again . . . removing most of the clay I added to the wing tips. So again, the instructions hinted at this by saying "Balsa gliders are tempermental about holding their trim over changes in the climate."

[Rocket Pic]I popped in a 1/2A3-4 and took a picture and let her go. After a slight spiral in the climb, she arced over and "pop" ejected the motor. The motor casing hit the ground right near me as the Zoomie™ took a steep dive toward the earth. According to the instructions, this indicated that I needed additional weight in the rear.

I added the weight and flew the Zoomie™ three more times on 1/2A3's. Each time I determined to add a bit more clay to the rear of the wings and each time the glide got better.

The 5th flight was on an A10-3. The climb was several large spirals. It was way up there. I heard the "pop" but never saw a the motor or the glider again.

Holverson recommends 1/2A3's and A3's

For FLIGHT/RECOVERY, I would rate this kit 3 points. I have watched other larger gliders at launches and they can really glide. This little bird didn't compare, however, it does provide a good way to get into gliding and was fun. If I were to build another, I would never fly in on anything bigger than 1/2A's though. It's just too small and goes out of sight.

This was my first glider. I had fun with it, but I believe that I needed the flight tests to trim it. It seemed to act differently in the air than me toss-testing it. I highly doubt this could win any duration events, even after extensive trimming, but it was easy to build and fun to fly. I give the kit an OVERALL rating of 3 1/2 points.

[Submit your Opinion]

GUEST's OPINION:
09/01 - "I bought one of the boxed, ready-to-fly Zoomie's at my local Hobby Lobby, mostly because it was something different than the standard Estes kits. I've launched it three times, all three low-level, looping flights. It glides fairly well, but fairly fast and has a tendency to get out of sight if you aren't careful. One flight wound up on a neighboring street, while the most recent flight was interrupted by contact between one of the wings and a telephone wire at speed. Entertaining, but not recommended for the health and well-being of your rocket. Mine survived, but now sports a crescent-shaped dent in the front of the wing." (B.E.)

GUEST's OPINION:
03/00 - "I have to agree with this review. Even though it is a very simple kit to build, take your time and make sure to get the angle of the wing joint right. I also seemed to see a difference in how the glider flew and in my toss tests. Perhaps I just wasn't giving it a hard enough throw? My Zoomie's days ended with a blowout of half of the balsa nose cone. I decided to move on to a Silver Hawk and a Swinger because of the great instructions and quality of this kit. OOP - Holverson Designs have great products." (K.J.)

[Enter Rocket Specific Tip]

SPECIFIC ROCKET TIP:
"" (x.x.)

[Enter Flight Log]
Date Name Motor Ejection/
Altitude
Wind Notes
04-26-1999 EMRR Est SU 1/2A3-4 na very light winds - Added some more weight to wings. Nice boost, ejection of motor and a bit better glide and less steep than last.
04-26-1999 EMRR Est SU 1/2A3-4 na very light winds - Added some weight to wings. Nice boost, ejection of motor and a better glide but still fairly steep.
04-26-1999 EMRR Est SU 1/2A3-4 na very light winds - Again added some weight to wings. Nice boost, ejection of motor. This time after motor eject, the glider fluttered and then dived into a glide.
04-26-1999 EMRR Est SU 1/2A3-4 na very light winds - Nice boost, ejection of motor and a very steep glide to the ground.
04-26-1999 EMRR Est SU A10-3 na very light winds RIP - Spiraling climb, out of sight, ejection heard, but that was it. Never saw it again. Status: Lost
07-02-2001 Bill Eichelberger Est SU A3-4 None - Glider 0-5 mph winds - Flew out of sight, but fluttered more than it glided (glid?) after motor ejected. When it did finally choose a somewhat more stable flight path, it flew off into a tree. Good times!
07-02-2001 Bill Eichelberger Est SU A3-4 None - Glider 0-5 mph winds - This one fluttered all but the last few feet. Some of the wing material was melted also.
07-15-2001 Bill Eichelberger Est SU A3-4 Very Late 0-5 mph winds - Huge looping flight into phone lines. Engine ejected on impact with wire. Minimal damage and a very cool flight. Some day I'll try it with the recommended engine. (1/4A3-2T?)
09-02-2001 Bill Eichelberger Est SU 1/2A3-2 None - Glider 0-5 mph winds - I don't believe it technically qualifies as a glider as it flew straight into the ground. The Zoomie is officially retired.
06-03-2002 Bill Eichelberger Est SU 1/2A3-2 None - Glider Calm - Didn't glide, but fell on more or less an angle.
06-01-2003 Bill Eichelberger Est SU 1/2A3-2 None - Glider 0-5 mph winds RIP - Flew off into the same woods that claimed my Mach 10. Status: Lost
03-03-2006 Matt Gillard Est SU 1/2A3-2 None - Glider 0-5 mph winds - wide loop, ejected motor and settled into a flat staight glide for 12 seconds.
03-04-2006 Matt Gillard Est SU 1/2A3-2 None - Glider 5-10 mph winds - wide arc boost with a short glide
03-05-2006 Matt Gillard Est SU 1/2A3-2 None - Glider 0-5 mph winds - Fast arching boost, ejection charge blew nosecone off, body floated to the ground, repairable
08-08-2004 Kyle Hancock Est SU A3-4 None - Glider 0-5 mph winds - First flight. Great flight with straight glide.
08-08-2004 Kyle Hancock Est SU A3-4 None - Glider 0-5 mph winds RIP - Power prang. Lost in grass. Status: Lost
04-14-2001 Andrew MacMillen Est SU 1/2A3-4 Just Before 5-10 mph winds - Good flight, a bit too windy, too steep a glide recovery.
06-17-2007 Mal McClenaghan Est SU 1/4A3-3 None - Glider 0-5 mph winds - First flight, power looped! More a flutter than a glide,. More trimming needed.
06-08-2008 Mal McClenaghan Est SU 1/4A3-3 Didn't Record Calm Event: Dandenong Wetlands
- Power loop followed by a fluttering glide. Really haven't got a handle on this one yet.
10-29-2000 Brandon Mickel Est SU 1/4A3-3 Very Late 0-5 mph winds - Boosted at slight angle 3/4 way up - then arced over and boosted back down - engine ejected about 20 feet from ground - hit hard - no damage
11-13-2004 Mark Muir Est SU 1/4A3-3 None - Glider 0-5 mph winds - Went up about 30 feet. Ejection blew out nose cone but did not eject engine. Glider tumbled into the ground head over tail. Parts found.
11-13-2004 Mark Muir Est SU 1/4A3-3 None - Glider 0-5 mph winds - Tried inserting the motor with just a bit hanging out to help ejection. This cause a lowering of CG which caused an unstable flight. Ejection charge fired and tore nose cone out again.
04-24-2001 Randy Powell Est SU 1/4A3-5 Apogee - Perfect Calm - cannot get it to trim out
04-24-2001 Randy Powell Est SU 1/4A3-5 Apogee - Perfect Calm - cannot get it to trim out
05-27-1999 Paul Smith Est SU 1/4A3-3 Didn't Record Light - West - Again, nosed in after straight high boost.
05-27-1999 Paul Smith Est SU 1/4A3-3 Didn't Record Light - West - Nosed in after straight boost.
02-05-2000 Mark VanArsdall Est SU 1/4A3-3 Just Past Calm - It goes up fast and right after apogee the engine kicks out shooting the rocket forward about 10 to 15 feet real fast, then it begins a slow glide to the ground. On the first flight it glided into a metal garbage can, but suffered no damage.
02-05-2000 Mark VanArsdall Est SU 1/4A3-3 Just Past Calm - On the last flight, it blew about 1/4 of the balsa nose cone out when the ejection charge fired. I have already repaired the rocket and am ready to fly it again.
02-05-2000 Mark VanArsdall Est SU 1/4A3-3 Just Past Calm -
02-05-2000 Mark VanArsdall Est SU 1/4A3-3 Just Past Calm -
07-08-2007 James Weaver Est SU A3-4 Didn't See 5-10 mph winds - Arced on launch. Shotgun ejection after nose crushing crash. Needs a new nose but should fly again.
   

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