Zipp J.A.E. Racing JAE21G2 Instruction Manual

ZIPPMANUFACTURING
ently Porter after smashing several IMPBA records with his JAE 21
JAE21G2
AZippkits R/CBoat
Building Instructions
2009 Zipp Manufacturing-Frankfort,New York 13340
www.zippkits.com
Toll Free(866)922-ZIPP

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The JAE21G2wasdesignedanddeveloped asaresultofajoint venturebetweenIMPBA Hall
ofFamememberRodGeraghty,DavidHall, RonZakerJr.&MartinTruexJr.
The maindifferencebetweenthishull andall theothersistheuseof sharpedgesonthe bottom
ofthesponsonsandtub,asopposedtocurved surfaces.Thishelpsbreakanysurfacetension
ofthewaterandmakesforafasterboat.
Thisdesignapproachhasbeenbuilt, developedand testedagreatdeal.
The JAE21holdsmanyspeedrecords, andiscurrentlythefastestboat inthe worldon the¼
mileovalcourse(16.0seconds/ 2laps).
Theserecordswerebroken byanexpertboatracernamedKentlyPorter.
Hispictureisonthecoverofthismanual.KP hasset some35recordsinthepast, andcurrently
holds19. Heknowswhat heisdoing!
WeaskedKentlytowriteafewsuggestionsforbuilding andrunning thiskit…
“Thething thatI wanttoimpress themostistobuildthekitasthemanual shows!
Itisagood design, handlesexcellent(evenat84 mph)and hasno badhabits. Don’ttry
tosecond guess thedesigners!Thishullistheabsolutepinnacleofmodel hydrodesign.
Thereason thatthereareno adjustmentson thishull isthatitdoesn’tneedany.Thathas
all beendoneforyou.
Ifyou takeyourtimeand buildastraight,truehull, you will havemostofwhatittakesto
win.
Therestisup toyou.Makesureyou haveareliableengine,and burnlotsoffuel!
Testdifferentprops.I liketheABC H-7.
Getcomfortabledriving thishull. Itissofast(especiallyintheturns), itwillscareyou the
firstfew timeson thecourse.
You will learnthatyou candrivethishullinanylaneyou want,and rough“race”wateris
welcome!
Finally, make surethatyou pay attention tothedetails.Everyonealwaysaskswhatit
takestomakeaboatreallyfast. It’snotonething, it’shundredsoftinydetails,allworked
outand optimized.Tryanything, ifitgetsbetter, keepgoing.Ifnot, trysomething else.”
Well saidKP!
We areremindedofwhat someoneonceasked:
What canIbuytohelpmewinmoreraces?
Acaseoffuel…

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Inadditiontoamarineengine,youcanuseanyaircooled3.3-3.5carortruggyengine, with
excellent results.
The kitisnothardtoassemble,asall of the hardstuff hasbeen doneforyou.
Thatisnoexcusetodo apoorjobwithassembly. The betteryoubuildthisboat,thebetteritwill
run.Often thedifferencebetweenan excellent buildingjobandapooroneisasimplesanding
block.
Anoteaboutoverhangs:
Thisboat isdesignedtoshearwaterandpreventanycapillaryactionof water. Todothisthe
tub, skiandsponsonshaverearoverhangs. Theseshearthewateroff and mustbeleftinplace
andnot rounded inanyway.
The boatalsohassideoverhangsonthe sponsons. Thesehelptheboat getuponplane
quicker. If youareusingapowerfulengine,youcansandtheseoff, but leaveall cornerssharp.
Takethetimetoreadthisentiremanual, sothat you arefamiliarwithall thebuildingsstepsand
theirproperorder. Takeyourtime; makesureyouunderstandeverythingbeforeyoudoitand
you will be rewardedwithanimpressiverunninghull…
Thiskit isnot atoy. Although R/Cboatingisafunandrewardinghobby,it canbedangerous
ifnot donewithcommonsenseand safetyinmind. Justaboutanyoneshouldbeableto
buildthiskit, butit shouldnot beoperated bychildren without closeadult supervision.
Themanufacturerassumesno liabilityfordamagesorotherloss intheuse ofthisproduct,as
wehavenocontrol overtheconstructionorend useofthisproduct.

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Toolsandsuppliesneededtobuild
§Sandingblockswith80 and150 gritpaper
§Drill with bits
§Square
§Flatfile
§FLATWorkbench
§1/2ounce MediumCAglueandaccelerator
§Goodquality5and30 minuteepoxy
§Epoxyfinishingresin
§Springclamps,paperclamps,cclamps,etc.
§RazorbladeorX-Actoknife
§Maskingtape
§Waxedpaper
§Woodfiller
§Primer
§Paint

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Additionalitemsneededtocomplete
§3.3to3.5air or watercooledNitroengine
§.187Colletandflywheelforengine
§Startingbelt
§.18718inchcablew/welded3/16stub shaft(Zipp3486)
§Headertofitengine
§Tunedpipe
§2channelsurfaceradiowith 2servos
§Throttleandrudder pushrods (2-56Size)with Clevises(Zipp)
§2pushrodseals(Zipp3404)
§8ounceFuelTank(SullivanSS-8)(Zipp 3473)
§.187strut(ZippZ21)
§.187drivedog(Zipp3485)
§1450Modprop(Zipp4008)
§Propnuts(Zipp3489)
§EngineMounts(Solinger 21recommended,Zipp 3488)
§Cablegrease
§Rudder(Zipp3483)
§12-18inchlength of1/4brass tubing

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Let’sidentifythepartssothat wecaneasilyfindthemwhen needed. Markthepartsthatare
insideotherparts.
/6 plywood parts:
/8 plywood parts

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Miscellaneous parts

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Foam parts
Doaninventoryofall the parts, tobe surethateverythingisthere. Ifanything ismissing
ordamaged, contactusassoonaspossible, sothat wecangetreplacementstoyou quickly.
Tub Jig
Werecommendthatyoumakeajigforthetub.
Thiscanbe assimpleastwostraight piecesof ½to¾inchthick wood.
It can be aselaborateas1/8by2inchaluminumanglewithadjustment slotsfordifferenttub
widths.
Eitherway,youneed somethingtoclampthetub sidesto.
Everycriticalcomponenton thishull dependsonastraight,squaretub.
Dowhateverittakestogetitdone correctly.
Left sponson has 2 holes
Right sponson has 6 holes
Foam nose block

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Tub sides marked before assembly.
Bulkheads glued in place (this is the 21FE).
Tub side marked for transom alignment.
Tub
Let’sbuildthe tub.
First, markthe insidesofthetubright
andleft. Thesponsonboomholeis
towardthe bottomof thetubside.
Makethesemarks inthefrontportionof
thesides, whereit won’tbeseen later.
Check thefitof thebulkheadsinthe
right tubside.
Useafiletotouchupthe insidecorners
on thebulkheads,tosquareoff thetiny
radiusleftbythecuttingbit.
Onceyouarehappywiththefitof the
bulkheadsinthetubside,gluethemin
withCA.Usethesquareprovidedinthe
kit toensureeachbulkheadisperfectly
square.
Makeamarkonbothtub sides(inside)
withaline that isanextensionof the
transomcutout.
Usethislinetoalignthetransom
correctlyon thetubside.

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Using the square provided in the kit.
Tub sides glued to bulkheads.
Tub jig.
Assemblethetubsidesonaflatsurface
Check thefitof thebulkheadsintheleft
tubside. Ifall iswell,gluethebulkheads
inplaceoneatatime, usingthesquare
fromthekit.
Flipthetuboverand lightlysand the
bottom.
Nowisthe timetouseyourtubjig. If you
don’t havethe abilitytomakean
aluminumjig, seebelow.
Useapairofthickwoodensticks.Leave
theseclampedtothesideswhilegluing
theaft bottominplace.