U Gary Shaw -ieT*U I-I ml @lU FOR MANY YEARS Ive looked forward little quiet time end day opportunity spend few moments flipping through pages model magazine peace see what new gizmos sale laugh little Microhenrys just read up emerging technologies seems like no matter look hobby theres much happening being able absorb allat least meseems virtually impossible find diversity hobby fascinating though Ive involved number years always seems something new horizon spikes interest suddenly go off again spending counfless hours irying master new attraction least learn safely Theres nothing better letting imagination break away real world once fly model paper airplane kite whatever Looking back year gone hope took plenty time break away family friends let yourself enjoy what hobby really abouthaving fun relaxing didntshame shame shame retrospect 1996 sure actionpacked year hobby reflected continued concern improved safety Looking through numerous publications columns ads safety continued common themes rightfully hope trend continues able learn something what has written bottom line care dont Rejuvenate Old Fuel havent leamed use power Internet youre truly missing development powerful electronic resources ever known Theres much information available fingertips finding facts just about anything easy clicking mouse scanning Net RC-related topics saw article written Tim Skloss Tim works Texas A&Ms Department Chemistry Laboratory Magnetic Resonance Molecular Scienceand hes also modeler Tim posted piece modelers describes remove water accumulates fueleven after its sitting around years should care Well starters fuel certainly isnt cheap makes difficult us dispose suspect has become unreliable because water contamination Ive seen few aircraft return ground hurry because fuel wouldnt combust properly Some very spectacular others merely hiccuped traveled down runway Bad fuel canand hasled accidents could have prevented Tims fuel-rejuvenation method applied Heres review Tims information have problem water fuel simple way reduce below part-per-thousands level lab use molecular sievesporous crystals let molecules certain sizes inside Once inside polar nature crystals structure binds other polar molecules eg water wont let out lots heat crystals hold approximately 20% own volume water can rejuvenated made reusable heating oven few hours above 3)0 F above 1200 C 3700 C/7000 F theyre still hot transfer rejuvenated crystals glass bottle widemouth pickle jar good cap tightiy after minute ensures crystals will stay water-free until next use Source get crystals stockroom shouldnt hard find since theyre inexpensive reagent-grade sieves use about $7 1 /i pints inch-diameter beads normal-quality sieves also available should cost less Important Molecular sieves also called zeolites available different pore sizes want size 3A 3A stands 3 angstroms size lets water methanol anything else larger nitromethane oil Size 4A will adsorb absorbtheres difference methanol thats bad us Also important sieves may make dust rub together final filtering clean container best before heading out field fuel should clearnot cloudy its clear may have accelerated engine wear will help demand high performance fuel highperformance engineshelicopters ducted fans January1997 45 -a competition So go out questionable fuel Note 3A molecular sieves used industrial diying nitromethane have used extensively chemical industry since 1957 Theres awful lot around just have know look Molecular sieves non-toxic dont put mouththey give off lot heat adsorb water Basically form glass sand Some things note about Tims article First source crystals mentioned Ill have find include later date Second crystals mentioned work anything like ones Ive used photography m theyll turn blue theyre saturated water youll know its time rejuvenate Third crystals can produce dust theyre rubbed together fuel filtration recommended prevent premature engine wear Im wondering heat generated crystals adsorb water fuel enough cause combustion have knowledge share please drop note can pass future date Winter Ski Fun thought might enjoy some information provided Bill thats know construct RC snow skis fly can have lot fun winter flying provided certain degree m Fuel systems boats cars helicopters aircraft Smoke systems vents uses fillers air retracts miniature pneumatic hydrolic pressure systems up 125 psi Plumb cooling systems flight boxes Thousands Made toughest nylon long life 75 piece assortment 1/8 ID array locking fittings including tees male female bulkhead plugs color coded rings just name few 411 22ndCenturv TwistKonexx quick lock fittinrs intergrate perfectly other TwistKonexx sizes1/16 3/32 1/8 ID 1/16 &3t32 soldseparately reusable vacuum formed box UTwistKonexxm Nylon Quick Disconnect Fittings 75 pecc I/S A.ortment 1895 Salt finer hobby stores everywhere order direct Add $400 UPS Visa Master Card & An Express 22nd Century PHONE/FAX tAr L Siw 295 905 943-5394 CA 93536900 273 -A ERO uIwaEh caution used Remember equipment seems get brittle its used cold props get nicked broken routinely Heres Bills information Eying winter off snow ice can really fun engine puts out power airplane flies slower have nice combination want try get some lighter fluid help start engine put little carburetor just before spinning prop Keep fuel getting too cold keep batteries warm until just before ready go might want go smaller prop/smaller pitch since prop will turn slower cold temperatures sailplane flew quite well aS x 3 prop during winter during summer couldnt keep airplane flying level aS x 3 prop used 6 x 4 prop best performance install skis make sure theyll never flop forward backward quite bad since will act like ailerons could easily crash airplane couple rubber bands over fuselage attached fronts backs skis way doing allows skis track ground fairly well Making skis fairly easy Cut piece ood about three inches wide 6-12 inches long size depends airplane 3 x 6-inch ski right size 40-size airplane front ski must curved semicircle will something slightly pointed better Cut 4-inch piece pine run down center front end needs curve up last inch front ski raised Drill hole just front skis center gravity ski will flop backward anything happens Mount skis place wheels Use elastics something skis will stay level flight several designs will work figure out dont like elastics idea Paint skis want can wax want cover skis fabric covering materials oniy choice Deep-powder snow very wet snow enemies during takeoff deep-powder snow youll need use water floats Very wet snow requires either waxing skis ski wax appropriate temperature and/or spraying Pam know kitchen stuff snow over patch grass can sometimes use Pam enable get up takeoff speed Some things fun snow I Shortest takeoff often possible take off meter 2 Bounced takeoff Make pile snow run airplane toward bounce air 3 Dropped takeoff Use pile snow make sudden drop run airplane off end snow works well have picnic tables flying field theyre just right height 4 Fastest non-takeoff time over hump Steer over some bump snow taking off difficult snow fast 5 Just playing around taking off H PRECJEN TION. LLect Dynamics Inc 1 -800-337-1638 313 422-5338 Fax VISA 31185 Schoolcraft Livonia MI 48150 w
