DH.ilffiiBy Stan ColeA superb l8 ' . in. spanllying scale model for

FuselageStart by bur ldrng luselage srdes f la l on

ptan logether wr lh 'warren girder ' Interbraces Selecr medrum hard stock for themarn top and borro.n fL l l lenglh , , .

, , In

me there could never be roo many but sadly,many ol the type lhave seen model led,whr lst lhe shape rs there, somehow the leeland character ol rh is beaut i fu l thoro'bredseems tobe mrssrng ASa'Tigerhol ic lhavebui l l several 'Trggres over the years wrthhopelul rmprovements Incorporaled In thrsdesrgn. Wrrh no great parns taken, rhef inrshed model 'werghed- in al 2oz and Inl l rght was ndrculously stable Wi lh your'Tiger 'crursrng lazr ly In lef t hand crrc les ona balmy summer evenrng whenseasoned 'Radro boys put down therrl ransmrt lers to s l ro l l over askrng al l sons olquestrons as ro 'how does i t f ly |ke lhal?wrl l be reward enough for your labours

longerons, bur ld another fuselage srde ontop of the f i rst and spl i t wtth razor bladewhen dry In the plan vtew lhe Tigerfuselage has three slrarght changes olprof i le one at lormer '8 ' , one al fornrer'C' and one rn f ront of f in (see ptan)Careful ly crack fuselage srdes al thesepoinls LH and RH belore addrng 11: and' /6 in cross braces fol lowed by iop decklormers'a ' to G' . Ner l add the l / r . rn sqsprne and cover top deck wrth l j?rn. sheelBind on undercarrage and add l r6 in x/ j { , rn. cross braces; nexl add motor mounlwith gussets (balsa cement)and cement Insecurely (PVA whrre is used for generalconstructron) Now fr t motor and lankassembly ( l used a Telco) and bui td molor

grven one coat 50 50 clear dope Cut oulcockpr l aper lures (detar l later)Wings

These are of convenlrondl conslru. l tonthe wing t ips berng lamrnated around

sloul cardboard forrners l found construc-tron much simplr f ied by maktng a completesel o l cardboard ( i i { , rn th ick) formers lo' Insrde prof i le l ine of wrng trps tar lp laneand rudder. prnnrng lhese down on aseparale board and havtng al l lamtnatedshapes ready when needed later The upper

marn planes are lorned to t ,6 in sheetcenlre sect ion and sel a l f i rn drhedrat atbolh wtng t ips Cover cenlre sect ion ( fueltank)wrlh thtn card and add la in wrdenorepaper t rssue suppor ls chordwrse over nbsR-2. l f desired the complete top sur lace otthe centre secl ton may be 'corrugated byapplyrng co(on at about O4in prtch. Wingsare skrnned wnh l tghtweight modelspanwrlh 50./50 dope (one coat) , as are tar tp laneand f in. / rudder

l f i l is decided to parnt the modet{ lhrnned

access halch Frt a

Lelt th.lusetage sidet.m.s ass.mbled lt tsvary

'hportant to Msut.Ih.ftte tquare to ea.hoth.l cur alt ot the.ight

.\a. y lhesame size,pbce the side ltameson. lht sutlace. with thetop snaight lon9.tonttcodown A weightcanbe usod to holdtham ia

I mm ply c lamp ptalebehrnd motor mounl. l j , In wrde , ] ,6 in longto act as a washer for engtne nuls AIach7j6rn.sq sr f lnger fut t lenglh lo each side ofluselage. Enttre fuselage can now becovered with modelspan l ightweight and

'NOT ANOTHER TIGER MOTHl Wel l . lor

Aoromodel l6t

Wh.nth.iat in, Ih. cov.nrg 0t.u. oo rh. ing. t. a.trin. hold ll.t utirg piat .6gl.d .v.r rh. l..dine .ad ra't-h9 .ttg.. wih , /16 p..ti,g uad.. rho l..dins il.ttt.i l irg .dg,lo*..p th. low.r sutl.c.lt a ro dte ."dthtin*. fhit ptoc.dut. thoul.l.lso b. c.ni..t out *hendoping ed l.lt ov.. aight, .t shrid*ing c.a tti ttlepl.c. rot tom.lim..lt.r th. dop. it.ppat.ntly.lty.

matt Humbrol), i t is al this stage i t should oedone - before assembly Vanous l tveriesfor this type are to numerous to mention.M.A.P. plan pack 2681 inctudes a yasrh and73Elh scale plan, plus excel lent detaireosketches and servlce history.

AssemblyAdd bui l t-up cabane struls lo luselage

and 'cemenl on completed uPPermainplane. When dry, chock-up fuselageand cement lower planes In posrtron shownon plan - keeping a careful eye onequilateral dihedral and squareness. Whendry add wang struts. Cemenl f in to lai lplane- th is assembly is secured lo fuselage witha rubber band unti l satasfaclory trrm, lurnand gl ide have been eslabl ished. l t is thenspot cemented ' in-situ' and r igging added(cotton); add r igging to wings (see sketch).At this point al l scale embell ishmentsmay be added to model. Personally l found'Aeromodeller ' scale drawing No. 2681 aboon in lhis direcl ion and therefore. have

not noted these pornts on the plan lokeep a working drawing simple. Howeverhere are some ol lhem Inlake louvre andsteo on cowl - starboard side, oi lottube onstarboard strul, wing t ip and rudder l ights,tai lplane struts, oi l tank (on plan) cockpitdashboard with leather'crash pads, windshields, and pi lol . The nose cowling as asimple acelate moulding bul a balsahollowed out version wil l serve equally aswell . Engine hatch is l ighdy spot cementedin oosit ion for easv removal,

Trimming and f ly ingFor a model of this type re COr weighing

2o2., choose a warm calm day (or evening)- shades of next spring l thinklAnd launchmodel ovor long grass. Bui l t as plan themodel should be sl ightly nose heavy and

Fobruary 1982

glide dead srraighr. Add 73ain. packingunder rear of taalplane (neg. incidence),ancrease i f necessary lo %6in unl i l a l lalgl ide is obtained The motor wi l l have beeninslal led with I o raghr side thrust and I %odown thrust; give the molor an up (drycharge and launch model into wind ( i f any)at shoulder height with a smooth fol lowthrough motion. Always lr im lor lel t handcirc les adiust ing lhe rudder s l ight ly.Stal l ing can of course be cured by add'ngeither more down thrust or a small amount

of plast icene up lronl. When sal isl ied withtr im, give lhe molor a 'down charge -fol low through launch again and walchyolr 'Tiggy come back slowly over yourhead - l think you wil l be pleased Vou bui l tr I l

A tew commonts on theengin

I found lhe Telco very f lexible in RPMrange - lr immang on low revs andstepping-up revs once lhe feel of the modelhad been gained. Personally I prefer toleave lhe iniect ion nozzle free - lhal tshanging sl ighl ly out of the underside of thetuselage and injecring the C02 by grippinglhe nozzle with the lhumb and fore t inger,thus saving the weight of a structure towithstand the nozzle pressu.e required andpossable damage to fuselage.

ln conclusionTwo protolypes were bui l t and both had

the same stable characterisl ics. G-ADIAwas bui l t around 1935, saw war servrceand has recent ly been completelyrefurbished and was the aeroplane f lownby HRH The Prince of Wales. Final ly lwishto thank my col league Mr. G. Sheppard forhas patience and help in taking thephotographs.

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