The Aerial Eye V2 N4
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28 the aerial eye / fall 1996 the aerial eye a quarterly publication of the aerial photography committee of the American Kitefliers Association volume 2 / number 4 / fall 1996 US$4.00 USA & CANADA US$5.50 overseas Town Square, Villanova di Bagnacavallo, by Andrea Casalboni sources If you can’t find what you’re Into the Wind 1408 Pearl Street looking for locally, try these: Boulder, CO 80302 Kite Lines Bookstore Phone (800) 541-0314 Post Office Box 466 (303) 449-5356 Randallstown, MD 21133-0466 Fax (303) 449-7315 Phone (410) 922-1212 The granddaddy of kite mail Fax (410) 922-4262 order houses. Wide range of The world’s largest selection of kites, kitemaking materials, kite-related books. Catalog. and accessories. Catalog. Kite Studio Air Affairs Playground, 5555 Hamilton Boulevard 107 Chelsea Road Golden Gate Wescosville, PA 18106 Hatboro, PA 19040 Park Phone (610) 395-3560 Phone (215) 672-1470 by Fax same Fax (215) 674-2826 Cris Benton Extensive selection of kitemak- Manufacturer of Sutton Flow ing materials. AKA publica- Form Kites, from 4 sq ft to tions and logo merchandise. 450 sq ft. Custom orders too. Catalog. KITES & KITEFLYING 2 the aerial eye fall 1996 3 2 years = 8 issues our feature this issue: the aerial eye kites & flight This newsletter is produced by the This issue completes our second year of Aerial Photography Committee of the publication. It’s late due to conflicting per- by STEVE EISENHAUER American Kitefliers Association. It is sonal priorities—sorry about that. Our sub- scriber list now stands at about 200. We’ll our goal to publish quarterly, in Au- A year ago, kites were the focus of the and 13' DCs have cen- lose some of those in the big year-end re- gust, November, February, and May. summer issue of the aerial eye. ter openings too newal frenzy, but our dropout rate has Single copies and subscriptions are small for use as a been very low, which is most gratifying. Since then, I've made changes in the available to AKA members and non- lower kite in a train; Makes the volunteer effort worthwhile kites I fly and how I fly them. Other KAP- members alike, under the following the 8' DCs have large and rewarding. Thanks. ers have likewise made changes and im- fee schedule: provements in their kites and flight meth- openings designed Each issue brings a new contributor or single 4 issues ods. So revisiting and updating these for flying in a train. two, but we can use more. Deadline is AKA $3.00 $10.00 topics seems like a good idea. There’s The hardest-pulling first of month of publication (see left). overseas $4.50 $16.00 truth in the adage “Only a fool learns from kite should always be Non-AKA $4.00 $15.00 Text via Email or on 3.5" (9cm) high- experience: a smart man watches and at the top of a train; overseas $5.50 $21.00 density disk (Mac or IBM in ASCII text for- learns from the fool.” In kite selection and during early ascent at mat) is preferred, but typed text or hand- flight method we've all made some fool- lower elevations the lower kites tend to Domestic subscriptions will be written letters are welcome too. Like- ish mistakes, but let's learn from mistakes flop around (and even occasionally circle). mailed by first class mail; overseas wise, diagrams in PICT, TIFF, or EPS formats collectively, not individually. Like a train locomotive, the top train kite subscriptions (i.e., outside North are best, but pen drawings, preferably on For me, delta-Conyne kites are still the must be big enough to pull the lower America) will be mailed by air. white paper, will work as well. ideal load lifters. Six DCs are in my bag: a kites into flying position and to prevent Advertising is available in modules Photos may be sent as negatives, prints 13' Sun Oak, a 10' Marshall and four 8' Ul- derailment (a plunge from the sky). of 2.25 inches wide by 1.25 inches or slides, or by electronic transfer only if tralights. Some experienced KAPers use DCs have a tendency to overfly [i.e., high, at $20.00 per module, payable in you’re on AOL. We can also read Kodak rokkakus, parafoils, deltas, and other de- glide over your head with slack line] in advance. Advertising in which aggres- PhotoCD, or 3.5" high-density disks in the signs. Each design has inherent advantag- light winds or whenever the wind dies sively competitive pricing is featured formats listed above. We'll keep the es and disadvantages; flying skill can over- down. If your camera is attached, this ten- will not be accepted; call if you have prints unless you direct otherwise, but re- come disadvantages and accentuate dency can be problematic: your camera questions or need more info. Camera- turn all negatives, disks, CDs, and slides— advantages. loses altitude quickly, and crashes if you ready copy is not necessary, but is ac- eventually. can't reel it in quickly enough. One solu- ceptable if it meets the above criteria. I’ll describe my own technique for flying tion is a substantial tail or drogue. I use Copy deadline is the first of the month Send everything to Brooks Leffler at the DCs, and leave the detailed discussion of both on my 13' DC: a drogue (29" circum- of publication. Contact Brooks Leffler. address below. other designs for KAPers with more non- DC experience. Last year I used one non- ference inlet, 4" circum. outlet, 16" length) DC kite—an Italian-made facet box kite for that trails 15' behind, and two 6' long 5- american kitefliers association aerial photography committee high wind conditions—but it crumbled in a strand streamer tails. On my 10' DC, two 6' gale one day and is no longer in my kite- long 5-strand streamer tails alone are suf- Steve Eisenhauer, Chair Brooks Leffler, Editor bag, So my experience is now exclusively ficient since this kite isn't used in light 229 Lake Ave, Pitman, NJ 08071 PO Box 34, Pacific Grove, CA 93950 with DCs. winds; the tails are more for stabilizing (609) 589-2049 Fax (609) 785-1766 (408) 647-8363 Fax (408) 647-8483 kite movement than to control overflight. [email protected] [email protected] Like most kitefliers, I watch tree limbs, leaves, and flags to estimate wind speed. On the 4 DC train system, the top kite Wolfgang Bieck Craig Wilson In a strong wind, the 10' DC goes up alone; has similar 6' long' 5-strand streamer tails. Am Britzenberg 23 7210 Harvest Hill Road in weak winds, the four 8' DCs go up in Never put a tail or drogue on kites below 29549 Bad Bevensen, Cermany Madison, WI 53717 train. For moderate winds, the 13' DC pro- the top kite: entanglement can occur as (+49) 5821 24 43 (608) 831-6770 the kites often wander during ascent. [email protected] [email protected] vides the lift or, if needed, one or two 8' DCs are added in train below it. The 10' • continued on page 24 4 the aerial eye fall 1996 5 measuring kite characteristics the eagle of sitka by CRAIG WILSON by ROBERT S. PRICE, Burtonsville, Maryland Sure, I could make it just like someone Looking up at kites flying overhead one nents: lift and drag. Lift is presumably use- The trip to Berck- else’s but that isn’t my style. Mine would sometimes wonders “Which is the better ful since it lifts the kite and any payload. sur-Mer, France, in need to come from my heart, my soul, my flying kite?” Drag is generally considered undesirable April was quite an ex- garage. So on Saturday I started. but is very important in that it provides perience for me. The One can make a pretty good judgment if The first thing I did was to go out into much of the stabilizing force the kite aspect of the experi- one kite is outstanding or the others won't the garage and look for different things needs to fly steadily. ence that had the fly. What if they are fairly evenly matched? that I could use to build the Picavet out of. greatest impact on How well is a chosen kite actually perform- One of the important quantities meas- According to Wolfgang Bieck, before start- me was meeting oth- ing? If you make a subtle change, did it im- ured on aircraft wings is the lift to drag ra- ing any project, you first need to build a er KAPers. With the prove or injure the kite performance? tio, L/D. Ratios for different wings (or kites) garage. I already had a garage so I saved a exception of very brief encounters with Some measurements can be made fairly can be compared as a measure of efficien- great deal of time and could get straight Brooks, Anne, and Steve, I had never been easily, such as the line pull, line angle, and cy. The lift to kite weight ratio (L/W) can on to the Picavet. kite weight. Others are more difficult, such also be used in comparison. But the wind in the presence of another aerial photog- speed must be considered too since the rapher. Sure, any two sticks forming a cross as sail area and wind speed. would work, but I was looking for some- lift is directly affected by the wind speed. Berck was for me a pilgrimage to the Everyone knows that the pull on a kite thing with a “spirit” to use.