GROUND
SKIMMER ISSUE N0,1S
JAN,-MARCH,1974
SERVING ULTRALIGHT FLIGHT ENTHUSIASTS EVERYWHERE SINCE MAY, 1972
CONTENTS
W.A.Allen I Editor Lloyd Licher I Consulting Editor Office staff: Clara Allen, Manager; Chon Ingram, Viola Smith, Carol Velderrain, Sr. USHGA OFFICERS Lloyd Licher I President 12536 Woodbine St. Los Angeles, Calif. 90066 (213) 397-4848 11
Kas II De Li sse I Vice-President 1138 N. Gordon St. Los Angeles, Calif. 90038 (213) 467-7620
Carol Velderrain, Sr. I Secretary 14906 Condon Ave. Lawndale, Calif. 90260
COVER:
Volmer Jensen flying the new, all-metal VJ-24 Sunfun. GS Award O Photo by John Underwood.
13THE FUTURE OF HANG GLIDING by Jack Lambie
Take a few pounds of Crudium, say "abra-ca-dabra," and head for Salt Lake City.
18 SOME FUN, THAT NEW VJ-24 by Volmer Aircraft
Take a few pounds of aluminum tubing, say "pop rivet," and head for the nearest hill.
~WHAT YOU ALWAYS WANTED TO KNOW ABOUT L/D by Glen Brown What you were afraid to ask by someone unafraid to say. ~~KNOW YOUR L/D with the help of Dan Schmitz & Vic Powell Really now, do you just step off without looking?
(213) 675-7088
~FOUR CHALLENGES FOR HANG GLIDER PILOTS by Emil Kissel And a response from Icarus freak Gaylen Grover.
(213) 431-8010
~f>4TH ANNUAL OTTO LILIENTHAL UNIVERSAL HANG GLIDER CHAMPIONSHIPS by Kas De Lisse & Virgil Dahrens To be read to the beat of music by Anthony Matthews.
Carol Price I Treasurer 2243 San Anseline Ave. #4 Long Beach, Calif. 90815 Charles E. Stahl I Flight Director 26671 La Sierra Mission Viejo, Calif. 92675 (714) 831-1861
~RECOMMENDED SAFETY PARAMETERS FOR OPERATION OF HANG GLIDERS by the Federal Aviation Administration And now a word from Big Brother.
31 HMA MEETING with the resulting proposal for HM1 CateEDITORIAL CONTRIBUTIONS are welcomed! Written, photographic, and illustrative materials appearing in GROUND SKIMMER are contributed for the enjoyment of the readers. The only form of monetary payment is $5.00 for one GS Award Photo each month. Contributors desiring return of their materials please enclose an appropriate envelope with return address and postage. All reasonable care will be exercised in handling materials, but their safety cannot be guaranteed. GROUND SKIMMER reserves the right to edit contributions where necessary. ADVERTISING: A rate card including conditions and mechanical requirements is available upon request. The basic full-page rate will be $150 effective with GS#20 (7-9/74). CHANGES OF ADDRESS: Please send six weeks in advance, including your name, USHGA #, previous and new address, and if possible a mailing label from a recent issue. Send to Subscription Dept., GROUND SKIMMER, Box 66306, Los Angeles, Calif. 90066.
gory I Specifications for RogalZo-Type Hang Gl~ders
BITS & PIECES Bede Wing ......... 8 Icarus II & V..... 8 Power Lines ....... 8 Canadian Publns .. 10 Warren Dunes ..... 27 HMA Roster ....... 32 First Aid ........ 35 Logbooks ......... 45 GLOSSARY Aspect Ratio ..... 19 Lapse Rate ....... 25 Reynolds Number .. 16 DEPARTMENTS Accident Review .. 34 Advertisers ...... 51 Birds Eye View ... 17 Calendar ......... 51 Classifieds ...... 50 Hang Badges ...... 44 Letters ........... 6 Pres. Report ...... 2 Reviews: Hang Flight ... . 36 Logbooks ....... 45 Stolen Wings ..... 10
GROUND SKIMMER is published monthly by the United States Hang Gliding Association, Inc., whose mailing address is P.O. Box 66306, Los Angeles, Calif. 90066, and whose offices are located at 11312Yi Venice Blvd., Los Angeles, Calif. 90066; telephone (213) 390-3065 (if no answer, 839-8014). _seco~d-cl~ss.postag~ paid at Los Angeles, Calif. GROUND SKIMMER is printed by S1ncla1r Pr1nt1ng & L1tho, Alhambra, Calif. SUBSCRIPTION is available only as part cf membership in USHGA, a non-profit, member-controlled educational and scientific organization dedicated to exploring all facets of fuel-less self-launched ultralight aircraft. Membership is open to anyone interested i~ this realm of flight. Dues are $5.00 ($6.00 for foreign addresses) per year of which $4.00 is designated for subscription to GROUND SKIMMER (12 issues), beginning with the current issue. Price_o~ single copies is 60¢ (some back issues are available from USHGA~see class1f1eds). Make checks pay~ able to "USHGA." ALL RIGHTS RESERVED. Items appearing in GROUND SKIMMER are published with all rights reserved to GS and the respective writers, photographers, and illustrators. PAID CIRCULATION of the December, 1973, GS, first mailed May 24, 1974, was 9,575.
hy
in a particula:r for more info.
/]
recommt,nda.tion feasible and/or :instructj on. lf the recommendation will no doubt consider ad1:,p1:i111g which time
(PRESIDENT I
lunm
Dea:r M:r, I 'rn
6/2/74
H ,Jim
in Newton, Kansas, has the "Bede Wing," a startI It completely the pilot hangs in into the trunk of
•
I
(7] 1) ('711)
, manufacturers, dealers, and instructors can hazardous sport reasonably without watching over llimg gI.id:ing can and must
Helmets Dear USHGA, Recently hang ki 11 ed in Spokane, wearing met and sustained stwere in crash. I've noted numerous pictures of in GROUND SIUMMRI? who are not wearing helmets, including cover photos. If we are to avoid cumbersome federal control must good start Lots without helmets Certainly this d at least to I am an avid SCUBA diver as well lo pilot. The sport of diving has avoided much outside control. responsible
TOH\LLY SAFE MECHANICAL DE·· LETS YOU GET AWAY FROM THE CASE OF ACCIDENTAL "BLOW "WATER LANDING." HOLDS POUNDS.
T8N lJS) to be assoand Terry .Jones available for , with 36
Chandel le-18', no S/N, blue am! orange in blue bag two orange stripes. Kingpost had 1/4" hole drilled Trapeze had camera mount fastened two , Colo. 81611
SAVES YOUR KITE
yellow, mid
1,
TAX
(303)
and blue kite 1 (?)
P .0. Box
, V:m Nuys,
B N L
0
u w E r R I N
T
s
NEW
ly contro 11 abl @/Ill metal, build. glider.
pilot has more pitch drag If he prone superior pitch Is fact that can pull himself through the additional forward moment. The decrease In direct result of the smaller frontal flowing past the pl/ot. The combination performance. The addition of kn,ee,,na11Qers enabled pilots to soar for extended ae,ryer·ati'na severe strain. The !?nee a pilot's legs without the hangers which ··""""'"" to maintain pilot having to exert in a balanced mode; in nar·mcmv with himself and his wing.
prone discover how The harness with lmee na,11g11rs, J42.
was
wns liavi
shockecl1
eke i de what to do iil>out the hmv th i could h:1vc gone wnmg nnd ring wh11t they cou Id have done wrong. ,Just think, to fly JlJnya de! IZcy, which is in Los Angeles lntern,1tional Airport Terminal Cont !\rea, l,c would nccc! t r:rnspondc , cncodi ng alt imcte
private pi lots or be r, havu o of' plan, clcarnnces, 1mcl fully i c•d i J l hear i.L in my nmhlcd dreams ol' t
pi J.ot" ( i di,l not have my c. Everything turm,d out , hut i I wa,; a parody of what might have tl1e Fl\!\, 1hrough some twi of hi ory, lrnd 1vhcn tlw Wright,; icd to fly hack in 190:,
O!l
the
HI.. !lanu },()()/)(' /V(l/)(c/)//;C(' / i ue Y1ff ~
ls
CD:
l. t
J
/J)
/in(/!'! en
Oze dune c1 yiequcut,
/
/;erwh. /1:?f/ ('i<'Ot erl to lhc 1
!, /,)hz' /('
through the
in one'
own
HL: HL: DC: HL: DC I run and float into the air and then ...
mances have gone few short years machines such and been built perience the low perf,or1na11ce amazing flights. llut what of the and exc:itinrr
Long, crushingly flights after the war Evolving airlines and ai the talents of ere a ti ve individuals who in the "Col In the brought the
we
im, boron and boron fl Der:R1a,,s
We don
packs, for the
1<1/74
l
1
radios, then stretch out the long shock cords. hundred , 4Cl-foot ships are flawlessly smooth and for flight. tanks for breathing and air tanks for control have fill cd nt the airport. You and I have flown both hang gliders and lplanes many years and have molded our knowledge to make the most of both sports. It' still dark we have coffee from our thermos and talk about the latest adventure on the new television serial "Fl for Tomorrow," about :i travel ing pilot who from ion to tion, to the old "Route 66 11 and "Fugitive" The last episode has h.im land:ing a ranch run by rm old inventor and hi daughter and our hero saved the day protecting the invention, that , from corporat:i on that was As he into the air the daughter waved from the bottom of the hill he soared higher to his next adventure. "Kinda , " you remark "Yeah, you that groat shot when he fol lowed the crooks down the mountain road in his gl l dor back and forth trees unti 1 l an·· ded their jeep'/ Some " "Aw, think was al I faked. Suddenly, our discussion arrested by the appearance of glowing wing shaped cloud. The rising sun has slowly the pink to gold we stretch out the shock cord launchers and move the slri ps backwards to the tension. We do this with a small l and tackle in the tail. You pick your balance it easily with the jet tip lers shots of You move the flaps down ten dcrw1 forward. 1~e shock level accelerate and controls
Air been
be an below that the of fl things. These called Reynolds Number (RN) , usefu:J the effects of fluid flow around air around airfoi The definition
where Pi the density of the fluid (.002378 lb. fd for air at sea level), V the in ./sec., L a characteristic length over the fluid in wing chord, or distance from 1 eading edge to tn1i , for an , and of the lh.-sec./ft (3737 x level At level then, RN~l.i,350,Vxl . (20 MPH) with approxi.ma·that they fly The significance of RN for hang gl .iders in the RN regime where changes occur in lift and drag. of of Airfoils that can be flown up all 18° before stalling RN over 1,000 8° at model airplane RN' of 30,000 los, with a wing that tip, there wing span. obtained in than those used by should not expect sults at lower ters with loyd 16
you shout the p mounts quickly Lnto the air. I pull couple pounds into my push the launch I run a few steps with the unwieldy craft and the Jerri on quickly sweeps me into the uir. The shock cord begins rol the self aunch tackle into the nose and l keep the forward unt i. l at MPH I my legs forward into flying ition and pull m1d bottom ap around me to ine the ship and for lot protection. The ride out to the valley Moj calm hut ahead 1 can puffs the scraggly clouds hegirming to form. You, ahead of mo, hl t tho turbulence first all(! radio, "Get , tho wave .i [ you bounce and roll, wings in the shears. We both turn in are in excitement and on
the pass through sit quietly, Lll rising, "Lot' go'." l shout in the on the white wings in the purple sky we 140-·knot 1 wind added to our 50 MPll.
east with a After four more Salt Lake
Ci Unzi and flaps the restaurant.
we lower our legs a level place by hissing we case to our heavy machines
jets steps on snow. After a warm mea 1 , a good the , we d our plans in the for or nue on? the next day' flying. Shall good conditions for Forecast ca:I for no more waves thermals. The west wind in the pine tn)es makes our choice for us. We pos i.t ion f aunch tackle and whirl off into tlrn morning back and forth the snowy we mount higher climbing we head valley toward Price, , we 28 l MPH quiet, sunny morning but ground in the next 45 minutes. 500 feet above tho ground I ooks 1 i ke we've gotten too soon and we' 11 have land. No l yet. Not too much worry though; we done before and a clay' climb pulling our wings~folded glass up to a take spot a from i ng al 1 clay. Then you bonnce swing turn Your electric variometer You flick on the radio so 1 can hear the audio tone lift, too, if I didn' know when I saw you swing into turn. "Over here: Over here " "I know I I know in this raven on. Tho 4 at 16,000 carry us at 70 MPH on our before sunset we begin the about Pikes Peak?" "No .. too that high. !low about the Denver?" "OK, try to make but beautiful ranch it we do wide hike down to the western rancher so and generous, we it and loaf for the day. Mayhe a local ight get brief sampling of the time take row. No matter; we are We a:re have our own We feel the air, the wind, the sun. Our l i tt and we our gliders. Sometimes we make them go where we want and other
seminar on ul Technol
Volmer Alrcraft-Photo1
John Underwood
made the the
rudder, You just cut time to comone half of madesigned landing.
can bend-
MADISON
. , SEATTLE, WASH. 98104
WHOLESALE DISTRIBUTORS SKY SCHOOLS~ PARTS REPAI DEALER INQUIRIES INVITED WASHINGTON BRITISH COLUMBIA
TECHNICAL
AllOUT TIIE
V,l
SUNr'UN
DIMENSIONS: MP!I MP!I
1n.
WEIGHT:
HUGGED TO U\ST A
Tl![
LOG ROOK MAil[
HARll BOUND GOLD SP/\CL TO
TIIRLAfl SEWN, SPtC!/\1 11/\NG 81\DGlS
CAN FlT l NTO BACK POCKCI WILL RECOfW ovrn 500 IUGIITS C\\[CK OR MON['/ ORDLR TO ONLY
l U SEGUNDO,
GRCT HIIMPHRI fS
COLOR: 90?4';
OWN[R
Pm ROOK
BROl,N,
GRITN SAT!Si:ACTION GUARANTEED
sink will be S.i nk by L/D
will travel 10 foot of altitude fol.I owing
two components, one that increases with and one thut w th speed. The sum these two high at high low speeds and has a mininrum value nt one particul speed in botWE)Cll. Minimum total corresponds to li
to tlrn wi .11 not
ing twl Lmum L/D 1 have fly ordc)r to obtain the same L/ll. vantago for they carry wator last to true with hang gliders on sink rate and the .larger kito an duo to abil to fly slower. Tho of tho flier' body has an on Ni\S/\ rosu l ts show L/ll' kito al one. Flyi with a we Lght of 200 pounds, the kite will 200/5 or 40 pounds of drag. Wind results at various attitude~ extrap,il,1tc,d to the , indicate that a about 12 pounds while a about pounds Tho L/D will be 200/ .85 for the seated L/D from flight tests One measure hoth the airspeed and the rate. vertical the L/D wil l the, two. flying i <lorn, Also, ground subs tan ti al l y . be used
the ratio kite the influence ward but error probably sma 1l enough for most purposes i\ fellow going California, recently asking He wearing an inside-out of America pin on t owner of a11 ho was dearly tryi.ng conceive of an than time, floated he wondered, we up and, one at slowly into the March, 1974 Aitadcua,
in thi example Wing loading~] lb./ft., CL for L/D max Glen Brown duate hicle
achieved over a
i\irspeed=28 MP!!,
Now Wo
NE:VV llorr1e
1
We have all the latest
We take used in trade.
ites
ip
iries nvited
MEANS IS NI CE AND MAKES YOU II IN' II USE IN YOUR EVERYDAY FLYING?
KNOWING WHAT BUT OF WHAT
When visiting for tho time, always pilots familiar with it for thoi r advice. If none round and decide fly anyway your judgement alone (you better know what you are take several things into Walk the until Walk
a·-
with enough of a.i.rspeed. Kn<)W1ng your glide angle roughly from and from ' data, you c:an estimate or not have tho capabi 1i ty to roach a landing area safoly. Schmitz of the So··Lo Glider Club in Hiawatha, Iowa, has come up with the Glide Path & Indi.cator" (all rights Ilis contribution much in determining the further "Gl:lde Slope Vic Powell has discovered with the components for such a device
shows method of computing an to l, tho flight most Rogallos It impply information to al low an observer to decide whether or not to fly tho Wind over ten MPH will make
However, thod shown avail ah Io, ways left
the forefinger. This i 1 eft thumb alongside this joint and joint
COMPLETE
, HARDWARE AND OR PRONE AVAILABLE ION
VELDERRAIN HANG P.O. BOX 3 LOMITA, CALIFORNIA (213)
tho thumb. On on flngor
Extond.ing the Tho the finger next to finger must be pointed elevation that it alongside the eye. the tip of tho left thumh nger Ln the diagram. thumh and, "eureka!", to i sn' it 'I tho unit eye 4 to 1 one unit on the he cleared, thumb. your list. Whi 1e and perh,ips direction. The hold wind meter come in handy there too, Toll me you didn't leave hack Annandale, Virgini January, 1974
tho
1·3/14
\
\
\ \
F L Y T HE
FI N
T
FLY
A
WI N G WI N G
upward, i ' own buoyancy in surrounding air keeps i going tip.
Aft watching the sun nk into the ocean, I headed north and landed, ending 45 minut de! ful flying I Lcilme back to earth with ittl more 1,isdom imcl i ight into the wi1ys of Old Mothc Nature. 1 am now rrnly need thnt 1 he lapse d,,fini.t infl on soit ring I. t may not nly is tho driving once tho ri dgc top is roached. Cupertino, Cali rorn in Apr i , 197 4
checl ancl who ?! (Challenge Wind socks ii imp! strength and di ion goocl .iclea of tho wind. Cl11e ill down, aml the th rd 200 ,lovm Sarntoga :i Ca 1 i forn i a; .January
but it up /Ir/ hy
ly Ileen hung !icier pi
or wind i , nnot Let',; hear the I<)/~
oxpans ion wi
(the same i clgc) .
Such :1 pa rec 1 w i 11
,000 feet
ultituclc
t ltc env i ro11me11 U1 l
upsc , an unstahl which .is displncc•d otlwr hanJ, i C the the adial1ati l
mtcl
/\ /\
MOMENT '/'HA'/' YOU GROUND :l'IJE MINU'l'E '.l'ElA'.I' YOUR '.I'OUCII DOWN f?ROM './'HA 7' .YOU ON .YOU wn,1; YOU MEAIV'T' 'l'O
Meet Director I would thonk all the with Lil i.enthol Moot: Di.ck rector; my daughter, !'at Gerard, L.Lc:hor and , announcers; Al Waddill, tor; 1 the manufacturers many It my pleasure to report that the Lilienthal Meet was ,1 groat Tho weather was good and the wind blew tho right The worst accident of the meet was kid who fell off On Saturday we hrand new Seagull III to drawing wi nrrnr Angelos, and Sunday the lucky recipient Klatt Tarzana, California. and l
Pl,0/J'l'TIVU /JWA Y F'l,0/J'l'llVU /JWAY HA CK
/J'l' 'l'Hli' END OP MOON
UD l!ON ''I' WOK POH rm
7N , Colo. Mass. , Texas--4, \\lash. Maine···l, Ohio-1) l ,000 flights ,000) of tho gliders wore Quick-· silvers, Boomers a variation on the V, Waterman biplanes, 1 Skysail, l Fly Me 204 of the flexible wings were from major manufacturers in (Eipper··Formance-·-50, Seagull , Bennett Oeltu Manta--·-12, Dyna-Soar·-··9) And, oh, , thanks go to entortai ners Anthony Matthews and Dave Shoffner for their hang gliding concert night, and Taras Kiceniuk for hi prolonged ells p 1ays therma 11 ing 1 l above announcers still have sore All .in all
CW WINl! 'l'O WHEHH YOU 'VE BE'li'N AND FAIi BEWW FOHM /J AS YOU DANCF: ON WI'l'fl YOUR BU'/' '!'!Iii'
YOU Wl/E'EI, /JNJ) 'T'URIV YOU UIVDER82'ANJ) WHY 87/VCF: MAN WAS BORN l11•7 !JA8 W/JN'l'ED
TIE' MIGHT OJI
60··10
5/16/7!+
RECOMMENDEil
PARAMETERS FOR OPERATION OF HANG CLlllERS
tions. Those i.ntended be
der 11 (2)
po rt authori Do not fly them within any prohibited str:i cted area ( 4) Do
manufacturer' prnvide minimum construction. Numerous may l>e formed
(S) (G)
b.
to Develop teda on techniques. (It i quality h,rrdware and constriJction appropriate ) (2) Ensure that adequate qua control during manufacture (:l) attention to program i established. (The UnHed Hang CJider lcdcJ Association helpful in this . ) Students should taught early to /;1Jo)
(ADVISORY CIRCULAR 60-10,
I
L
(4)
if.
11
(S) (6)
(7)
should be encour-
(8)
/\dmini , wjthin reason, to during this developmenencouraged to work that
(,.
1
.00
X
Qui
.00
i'I ver
.00
'
NO 7.
or ors
in
A
are aware ment
monop·1 ane ly engi
Condor i
81
&
in
$15.00
on
is an all-aluminum, Condor
not nt plans
.00
if. 91 30
1·3/74
L
approved
comparabl recomniended
L.
M
IIMA C/ITFGORY l FIC/\TIONS (PROPOSA[J FOR ROGALLO-fYPE HANG GL!
N.
A. ll.
C. D. F C II
Must be mcmbc
!IMA
or
IIMA mcrnlle !!MA
c. I!. ha 1 l
l d
:m
inch minimum.
or
,/eonc
to
members of the
Assodati on
of Juno 7, 197 4.
to manufacturers of to al
lofts, and prowell as smaller not ready to hut: who
HMA.
mean endorsement of or stimci,n:ds presented on the indication of sincere inself-regulation.
HMA VOTING MEMBERS 1-Ultralite Products, Inc., EJ Segundo, 3--Mimta Products, Oakland,
4-Bill Bennett Delta Wing Kl
. , Van
, CHli U.1 tralight 6-Free--Flight
Calif.
, Inc., Inc., "·1 ·r,•1°·,n·r, Santa Monica, , San Jose, Calif, , San Diego, Calif. 15-Chandelle Corp., Golden Colo. 16-,J.L. Enterprises, San , Calif. ··E:ipr1er--For1nar1ce, Inc., Torrance, Inc. Marlboro
.,
t\ Kite Systems, Santa Monica, if. Kites, Ltd., Calgary, Alberta, Canada Moose Dc'\l ta Wings, W:Lchi ta, Kans. Clicler Supplies, Columbia , Ohio
HM/~ ASSOCIATE MEMBERS 1000-Dan Poynter, North 1001-Victor F. Musser, 1002-Gary D. Daniel, l003··Chandelle Northwest, 1004-Bonn Industries, Inc., 1005-W.B Products Redondo 1006-L. Gnbriels, 1007-Kartwa.y Park, GLiders, rnl'Cl-1':-H•H'i 1• Gu 11, San
THI~ M&:'E:r
, Wash. and
c:HOICE
TO:
NDJ! 1-3/4" color on metal pin, NEW! 3" with sewn colors 3··3/8" or decal, still just
ORDER FROM: USHGA, plus BOK 66306, Los Angeles, CA 90066
1·3/74
I and
m
Michael Mi:lrkowski President
<'Ii :ONV
and built
ully stress anal More than twice Redundant
other maintains structural in-
' allowing you to the kite in the event of f failure, ii for from
a dive, too numerous to mention,
in
Ill
111
IN page construction manual available Also available as !<its or Ready to·Fly !
No loose torn Choice of color sail cloth. lettfJring available to ' your kite.
fully ii cata line of accessories and build Dealer Inquiries Invited.
MA
than five min-
OTTO Lilienthal memt:,er,ship UUl/;;JllJ!C and "''"''I'.""'"·" I·'".,"""·'"'"
Chairman, USHGA Accident Review Board
newspaper,
LOW
205
BOOKS:
well done: New members: Non-members:
Your entry will not be Each copy:
are, just
our
PLANS WITI! FINE MANUFACTURING BACKING:
sport. medical
The or
its $5 $10
Wind Meter
$5.50 Non-members:
or
overreaction. You douht add to the
MAILING LIST SERVICE If
Association
possible Then the US!!C/\ Board GROUND on any trends we look at numbers of accidents. the Accident Board accidents and to serve the followwe function effectively bank on hang we of data and , if not others. We will hopefully develop in hang dent reconstruction, and governmental
Inc.
DEFINITION:
Bill Bennett Delta Kites 483 CA91408
Mountain Marine 541 Dr. Denver, Colorado Sail
GENERAL DIRECTIONS:
The Bell Soaring Helrnet is distributed worldwide by
CA 90745
SOME THOUGHTS ON THE PHILOSOPHY OF INSTRUCTION AND A QUI CK REVIEW ON THE SPORT'S FIRST INSTRUCTION MANUAL
6
Lons.
what
unable to get a trai 11ing STUMME//, hut , early mentlon. It without doubt the most complete, and best ii lustrated yet made at a manual, nnd it includes some information on wind soaring which has not appeared before in any of the sport' publications. It does not exclude rigid wings, but concerns f mainly with Rogallo flying. Hang from 1 imi tod viewpoint from with·· in the ly from too much tional ng manual proach gI i.ding The angle of 29, taken 1.L terally, i only wTong but con-18-20. Anywith anations about flight on horizon will one putting noseplate that close to be :in for a shock. Would someone who in ight wel i They are helpful , but them in flight, on which writer. The definition , 17-foot keel) much too narrow, and that the authors rule the Seagull III out Rogallo." I'he Seagull I I J at least for tra.i ning any std. Rogallo flown under supervision under one lb./sq. ft wing loacHng. That' another point: The manual aimed ion becorni.ng outmoded) and so recommends one lb./ sq. ft. of wing ting lo. That' OK people what But self on and where possibl people should take their lessons under supervision on a larger std. lo to give decreased speed and rate of sink, which , more forgiving, :md smoother to inst] 11 confidence. Hang confusingly switches back and forth, in re·ng to contro I movements, between shi and movement. [t should on , should be shift. Beginners and early intermediates should be taught that tho anything but to hold onto. It only becomes "control bar" to be in advanced flying From the very beginning person should be taught to move hi body in relation to the direction he wants to go, or as the control stick moved in an ajrplane·-·the body the stick, in effect. Moving the trapeze instead all backwards begin wlth (shove left to go right?), conflicts with any prior or future training in conventional aircraft (also the V,J-23 and VJ--24), and control situation has transitioning a popular ono prominent instructor dis-model he ls airplane pi to "move the con-opposite of how control · stick moves." the need for it when t so simple with "move your body just you move a con· ,Just recently we heard that a very experglider pl lot ready to solo sailplane was fused by instructor "What cJ ire ct.ion do you move the control stick to get a sai. lplane out of a stall?" "For-ward." "What direction in hang glider?" "Backward "
Q.E.D. But, back to !Jang sincere effort, the to date, and well worth the on it. It is somewhi ch wi 11 benefit beg.i nnors and inteTmediates, and should be mandatory read.lng for al instruction Sail Wing Sky School has standard tool in their Nautics, P.O. Box 1154, --W fl.A.
36
••
l'HE WINDSONG ROGALLO CAR RACK
FITS
TO VANS
Because of the praise our rack received at tho recent Sylrnar Otto
Lillienthal meat, we are putting it into production. It features (luik··N~Easv brackets 'for sirnple iqstallation and removal. justable steel straps covered with armaflex that hold
all
kites securelv. K itos can be released by
pulling the
pin, A padlock (not included) may be used to provide security theft. Racks are designed to hold one to three kites by more straps, Black steel base with aluminum alloy brackets, $
•
Manu·facturer's special introductory offer
honored until July at
1974. Price includes complete rack fitted for om.i kite. Adjustable strap kits for additional kitos may be ordered at
$5.95 per kit.
ura, Enclosed is check [] or mont,y order [] for cover cost of the basic Windsong Kile at $39.95 pins $5, 95 for each additional strap kit, Add $3.00 for prepaid postage and handling and 6% sales tax if resident ot' California, Order now as our regular $49,95 1>rit:c will go into effect August l, 197 4,
•• 1"3/74
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DIMENSIONS: i SAI are 3.8 oz. nforci ng. CONSTRU ION: Three piece control Rigging e i a·i vidual ing wire ·i l/8 11
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INC.
RRAIN & CO. I PHONE.
OR STANDARDS
BONN INDUSmlES. INC.
West Rawson Avenae Oah Creeh. Wi. 53154 Available from MANUfAC rum
t AUNCII FLIGHT Pf10DUCTS
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1·3/74
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Ill
by W.A. Allen
., Veldorrain , Volderrain kite , Flexi Flier
6. Timothy
, Hiawatha, Iowa, Fontana, , Wills Wing ""''"';,,,,, El Waterman biplane Stout IWM, Dellwood, Mo., Flier
1. Daniel R. Schmitz C. Porter,
Hiawatha,
Realisti glider with
*andExclusive
new
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44
TH/\T THE 'MOOSE' Kl PERFORMANCE IN COMPETIT ON
FOR NFORMATION /\ND THE NEAREST YOU, WRITE OR CALL
CADDY L/\N[, WI CHIT/\, l</\NS/\S
MEHIL N
46
RPRI
DEALER
READY Sail/Jirci Plying Machines has researched and tested various designs years. Our efforts have proc/111:ed what we believe are the safest, most durable gliders available. The sailbircl is constructed of aircraft hardware, seamless aluminum tubing, stainless steol rigging cable, with safety features such an individ11i1I aircraft !JOit at both ends of each flying wire. Special fittinqs permit adiustments of keel reflex and wing dihedral. The special aircraft drilled shani< bolts, nuts and safety pins f)ermit set-up without tools than minutes, witho111 the use of 11ip pins, wing nuts, quicl< release mechanisms or links. l?emember, safety must r:ome first! Sailbird sails made of the finest stabili7ed dacron sailctoth i/Vililable. They aro precision cut and heavily minforced with all seams do11/Jle ?ig-zag stitched with heavy dacron thread for high gust luads. Tlw stilch permits the seams to give slightly thread breai<aqe and possible blowout.
Colorado
Assembled bags, flacdalns CA 92014;
6600
DAEDALUS FU GHT
IN THE EAST·-Learn
DWYER
WIND MEH:R-Hand held, standard safety tool. $5.9~ If use Otto number, only $5.50. Self-·Soar ation, Box 1860, Santa Monica, CA 90406.
HALL' HARNESS-Illustrated building $2 .00. harness. Send check Ila 11, Pearce . , Carden Grove, CA 92640.
so
anytime. 1•3/74
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