FREE FLIGHT DURATION NIBBLE 300 Norm Poti s Niblite featured construction article October 1995 MA has little brother Nibble 300-square-inch 1/2AIF1J model Like Niblite Nibble uses thin flat-bottom wing double-tapered planform wide box spar functions like D-box stiffen wing fuselage carbon tube Ken Oliver Power Galbreath-prepared CS 049 Seelig Minicombo timer handles auto functions VIT bunt auto rudder DT Note wing overhangs rear pylon wing hold-down rubber bands go through hole wing line up rear hook Norm told built wing stab three years ago didnt get around finishing model until 1995 its first outing set new Category III record 19 minutes Norm has since upped 27 minutes change Look construction article Nibble 300 upcoming issue Model Aviation Light Tails Keep rear end light probably familiar admonitions free flight know tail-heavy model difficult trim keeping rear fuselage stab rudder light involves just getting center gravity CG correct spot After could just add nose weight move wing back Either way can get CG correct location adding nose weight balance too-heavy tail will often result model overweight Moving wing back will shorten tail moment arm lessen its effectiveness can keep total weight model down minimum tail moment arm proper length CG correct place heavy rear end will still hurt performance model due increased inertia heavier tail Sure can get model glide well its stall-recovery characteristics wont good gust knocks nose up stabs lift will increase bring nose down inertia heavy rear end will cause stab go too far overshooting steady-state glide position leading slight dive stab tries correct overshoots Part improvement performance FAI events recent years due lighter tails tailbooms example own FlB Wakefield models ten years ago used rolled balsa boom weighed about 2 1-22 grams including rudder fittings stabs admittedly overengineered weighed 8-9 grams new models have booms weigh 12-13 grams stabs about four grams weight savings other events similar FlC power model stabs used weigh nearly 30 grams now close half FIA Nordic Glider purpose-made carbon fiber aluminumcarbon booms have replaced heavier fiberglass fishing poles auto-function fittings smaller lighter reducing both drag inertia Lighter tails have also allowed longer tail moment arms offer other aerodynamic advantages Because reduced inertia believe can trim model lighter rear end closer stall glide wont smooth will almost continuous series slight adjustments air can hard see distance might want try some low-power flights get model up 50-100 feet can watch glide last World Championships noticed Andrea Burdov Russia making repeated low-power flights finetune glide has added advantage being lot faster making full-power flights attendant long chasea good idea check glide adjustments just before flyoff also noted some folks out flying hand-launch late day Nordicsbunt looked like lot fun now hope convinced should keep tail light Lets look some ways Use light wood place use six-pound-density balsa youve hoarding building kit consider cutting some new stab ribs out lighter wood substituting lighter wood spars edges Solid balsa rudders real killers Build up go lightest wood can find Sand thinner amazing much weight can remove few minutes sanding built-up balsa 112 Model Aviation 4Norm Poti FiC power models Note simple non-recording thermal sensor mounted streamer pole Lightweight stab Gerald Codys FiC uses narrow carbon-fiber D-box carbon rib cabs carbon trailing edge Light tails important dynamic stability Carbon rib spar caps carbon TE help save weight F 8% Log Spiral Z1 wingspan55 Area 300 sq Stab Area 21% wing C 5 % Wing Fl ieStraight/Sunt/Right 90 La 0 1~ inA Wing tie down through hole Neight- Grams Wing55 Stab8 Fuselage39 fleer22 Engine88 Radio5 etal211 765 oZ 6% Log Spiral 17O .j Wing Gag tueclage /C Gaibreath CS Leg4so Morris araleeS VIT Oliver motor tube talIboom Polls Hangar Prop Semlig MInI-CombO PotI backplate/sleSV5 mount 4 0 Gag down/left/right Nibble 300 Norm Potis Cat Ill record-holding power model Look construction article upcoming Model Aviation fuselage such often used AMA Gas models sand sides top bottom taper beginning wing trailing edge especially important use spruce corner longerons Save covering Substituting -mil Mylar doped tissue will save several grams 50-square-inch stab weatherproof quicker use stab structure will need designed resist warping flutter its ownthe Mylar wont help like tissue does Use composites Carbon-fiber rib caps spar caps trailing edges D-box skins allow lighter stiffer surfaces wont change day day Carbon aluminum-carbon tailbooms offer reduced weight size increased stiffness Reduce size Does stab mount really need big need use 2-56 adjusting screws 0-SOs would Take look state-of-the-art FAI model fittings very very small Using 8-pound-test monofilament fishing line instead 30-pound-test braided Dacron will save several grams Wakefield model three lines rear Move forward doesnt have back dont put Fuse DTs should located near wing way back back Timers tracking transmitters other accessories should close CG Latex Tubing Tucson John Epley writes new source 46 latex tubing used fuel bladders Power models Roadrunner Oxygen Medical Supply 1340 E 20th St Tucson AZ 85719 Tel 520 628-1888 800 4477690 order number /6 latex tubing 88-3931-316 available 50-foot rolls get together couple flying buddies share order cost $1860 per roll plus $2 shipping handling Finding Lift Back 1960s George Xenakis developed first recording thermal-detectors used polemounted thermistor detect slight changes air temperature moving pen traced temperature fluctuations onto revolving paper-covered drum studying ups downs temperature size strength thermals could determined construction article Georges thermal detector published April 1968 Model Airplane News Yes used include free flight Other modelers have built own versions over years changes improvements Bill Turner offering updated improved version recording thermal detector features all-metal construction servo-motor pen drive unit fitted tripod mount holder thermal pole tripod pole included unit $350 postpaid Bill requires deposit $100 prior shipment balance due COD Allow three weeks delivery after receipt deposit Bill Turner 3027 Rutgers Ave Long Beach CA 90808 Tel 310 425-6866 Fax 310 429-7255 996 113 Obechi Large Sheets Please cali 509-548-5201 send SASE 12306 Bergstrasse Leavenworth WA 98826
Edition: Model Aviation - 1996/05
Page Numbers: 112, 113
FREE FLIGHT DURATION NIBBLE 300 Norm Poti s Niblite featured construction article October 1995 MA has little brother Nibble 300-square-inch 1/2AIF1J model Like Niblite Nibble uses thin flat-bottom wing double-tapered planform wide box spar functions like D-box stiffen wing fuselage carbon tube Ken Oliver Power Galbreath-prepared CS 049 Seelig Minicombo timer handles auto functions VIT bunt auto rudder DT Note wing overhangs rear pylon wing hold-down rubber bands go through hole wing line up rear hook Norm told built wing stab three years ago didnt get around finishing model until 1995 its first outing set new Category III record 19 minutes Norm has since upped 27 minutes change Look construction article Nibble 300 upcoming issue Model Aviation Light Tails Keep rear end light probably familiar admonitions free flight know tail-heavy model difficult trim keeping rear fuselage stab rudder light involves just getting center gravity CG correct spot After could just add nose weight move wing back Either way can get CG correct location adding nose weight balance too-heavy tail will often result model overweight Moving wing back will shorten tail moment arm lessen its effectiveness can keep total weight model down minimum tail moment arm proper length CG correct place heavy rear end will still hurt performance model due increased inertia heavier tail Sure can get model glide well its stall-recovery characteristics wont good gust knocks nose up stabs lift will increase bring nose down inertia heavy rear end will cause stab go too far overshooting steady-state glide position leading slight dive stab tries correct overshoots Part improvement performance FAI events recent years due lighter tails tailbooms example own FlB Wakefield models ten years ago used rolled balsa boom weighed about 2 1-22 grams including rudder fittings stabs admittedly overengineered weighed 8-9 grams new models have booms weigh 12-13 grams stabs about four grams weight savings other events similar FlC power model stabs used weigh nearly 30 grams now close half FIA Nordic Glider purpose-made carbon fiber aluminumcarbon booms have replaced heavier fiberglass fishing poles auto-function fittings smaller lighter reducing both drag inertia Lighter tails have also allowed longer tail moment arms offer other aerodynamic advantages Because reduced inertia believe can trim model lighter rear end closer stall glide wont smooth will almost continuous series slight adjustments air can hard see distance might want try some low-power flights get model up 50-100 feet can watch glide last World Championships noticed Andrea Burdov Russia making repeated low-power flights finetune glide has added advantage being lot faster making full-power flights attendant long chasea good idea check glide adjustments just before flyoff also noted some folks out flying hand-launch late day Nordicsbunt looked like lot fun now hope convinced should keep tail light Lets look some ways Use light wood place use six-pound-density balsa youve hoarding building kit consider cutting some new stab ribs out lighter wood substituting lighter wood spars edges Solid balsa rudders real killers Build up go lightest wood can find Sand thinner amazing much weight can remove few minutes sanding built-up balsa 112 Model Aviation 4Norm Poti FiC power models Note simple non-recording thermal sensor mounted streamer pole Lightweight stab Gerald Codys FiC uses narrow carbon-fiber D-box carbon rib cabs carbon trailing edge Light tails important dynamic stability Carbon rib spar caps carbon TE help save weight F 8% Log Spiral Z1 wingspan55 Area 300 sq Stab Area 21% wing C 5 % Wing Fl ieStraight/Sunt/Right 90 La 0 1~ inA Wing tie down through hole Neight- Grams Wing55 Stab8 Fuselage39 fleer22 Engine88 Radio5 etal211 765 oZ 6% Log Spiral 17O .j Wing Gag tueclage /C Gaibreath CS Leg4so Morris araleeS VIT Oliver motor tube talIboom Polls Hangar Prop Semlig MInI-CombO PotI backplate/sleSV5 mount 4 0 Gag down/left/right Nibble 300 Norm Potis Cat Ill record-holding power model Look construction article upcoming Model Aviation fuselage such often used AMA Gas models sand sides top bottom taper beginning wing trailing edge especially important use spruce corner longerons Save covering Substituting -mil Mylar doped tissue will save several grams 50-square-inch stab weatherproof quicker use stab structure will need designed resist warping flutter its ownthe Mylar wont help like tissue does Use composites Carbon-fiber rib caps spar caps trailing edges D-box skins allow lighter stiffer surfaces wont change day day Carbon aluminum-carbon tailbooms offer reduced weight size increased stiffness Reduce size Does stab mount really need big need use 2-56 adjusting screws 0-SOs would Take look state-of-the-art FAI model fittings very very small Using 8-pound-test monofilament fishing line instead 30-pound-test braided Dacron will save several grams Wakefield model three lines rear Move forward doesnt have back dont put Fuse DTs should located near wing way back back Timers tracking transmitters other accessories should close CG Latex Tubing Tucson John Epley writes new source 46 latex tubing used fuel bladders Power models Roadrunner Oxygen Medical Supply 1340 E 20th St Tucson AZ 85719 Tel 520 628-1888 800 4477690 order number /6 latex tubing 88-3931-316 available 50-foot rolls get together couple flying buddies share order cost $1860 per roll plus $2 shipping handling Finding Lift Back 1960s George Xenakis developed first recording thermal-detectors used polemounted thermistor detect slight changes air temperature moving pen traced temperature fluctuations onto revolving paper-covered drum studying ups downs temperature size strength thermals could determined construction article Georges thermal detector published April 1968 Model Airplane News Yes used include free flight Other modelers have built own versions over years changes improvements Bill Turner offering updated improved version recording thermal detector features all-metal construction servo-motor pen drive unit fitted tripod mount holder thermal pole tripod pole included unit $350 postpaid Bill requires deposit $100 prior shipment balance due COD Allow three weeks delivery after receipt deposit Bill Turner 3027 Rutgers Ave Long Beach CA 90808 Tel 310 425-6866 Fax 310 429-7255 996 113 Obechi Large Sheets Please cali 509-548-5201 send SASE 12306 Bergstrasse Leavenworth WA 98826