Cessna 172 RC Plane – DIY Build and Fly

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Cessna 172 RC Plane – DIY Build and Fly

hello everyone rc plane builders and pilots it’s me again julius and welcome to my channel For you who cannot understand bahasa indonesia I have English subtitle below you can activate the CC button ok everyone we meet again this time we’ll build cessna 172, this is the plane I use color scheme from Captain Vincent Raditya’s cessna maybe you already know him Indonesian pilot youtuber with the largest follower in the world With his youtube earning he bought himself a real plane amazing, i want to be like that Bro Vincent let me borrow your plane’s color thank you bro After donwloaded print the plans on A4 size paper Use a sharp hobby knife to cut the paper to be traced on depron foam cut the holes as well like in the video use small cellotape to combine the segmented plans according to the plan’s number we use 5mm depron foam trace the plans onto the foam sheet with ballpoint pen you can use pins for pin the paper on its place each fuselage walls are unique they are not mirrored the front part is different from one another trace the plans including the holes inside make a line across the pair of holes to mark former placement in the previous episode there’s asking how to cut depron foam with hobby knife number one, you have to use a sharp hobby knife number two, hold your knife as low as you can from the foam number three, cut in 2-3 pass do not force it in a single cut cut all part that are made from 3mm plywood, which are fuselage formers, firewall, airfoil formers and landing gear base bend the front part of the fuselage base like the build instruction on paper-replika.com do not flip this part look at plans instruction sand all the former guide lines with rough grit sandcloth so the formers can have stronger bond attach the left wing first, all the guide lines are on the inside side apply glue 5cm length on the foam hold it still for at least 30 seconds until the glue set and then attach the right wall apply glue every 10 cm one side at a time until all are glued remember to hold still the part at least 30 seconds until the glue is set longer time you hold still the better attach plywood firewall on the guide lines in front of the fuselage you can see the firewall is tilted to the right if we see it from behind

it was designed on purpose, do not make it straight because if you make it straight the plane will have left turn tendency when flying firewall offset is needed for plane to fly straight forward sand the inside edge of this part so it will fit with other parts glue it 5 cm on the front and leave it until the glue is set then continue glueing bit by bit until it all glued make sure this part is not switched with the right side because it’s unique for each side remove the excess foam and sand it down remove the glue mess with your thumb rubbing it until it warm of friction close the gap with this part do the same for the right side attach 2 reinforcement parts on the fuselage base attach 2 wing supporter formers align with the guide lines taller former is on the front i painted them with black it will look subtle when we see them from outside make elevator and rudder servo platform make it stiffer with ice cream wooden sticks attach the servo platform onto both formers assembly battery tray platform make sure the side is correct, see on the plan’s instruction attach 2 foam sheets behind the firewall attach velcro on the center of the battery platform and then put the battery platform between firewall and former push the platform down sand the edges if it stuck bend the rear part of this part with heatgun and rub it on a metal pipe make sure the side is correct, see on the plan’s instruction also bend the front part of the tail top cover sand the both edges on the back side so it will be fit with other part glue the first 3 cm on the front part for the first grip and then glue the right side, half of it hold still on its position approx 60 seconds for this kind of bended part needs longer time to let the glue harden back glueing the left side next the right side until all glued attach tail top cover fit the front part and leave the back part like that, we will trim it later trim the excess foam and then sand all seams until all smooth curves i use turnigy 2830 size motor

with 1000kv you can use 22-28 motor, 1000-1400kv max prop size is 10 inches, ideally 8-9 inches depending on your motor install motor on the firewall place the motor mount on the top edge of the firewall because the motor is tilt to the right place the motor a bit to the right if we see it from the front, so the tip of the shaft will be on the center cut the cowl according to plans stack up 3 foam parts for front cowl and then glue it to the front with the hole fit to the motor after the glue is harden, trim the excess foam and shape it to match the contour of the cowl sand it with rough sandcloth for faster work and then smooth all the curves with medium 240 sandpaper while wet the foam with water sand the edges of stabilizers into curved shapes I use white packing tape coat fuselage bottom first trim the excess tape continue covering on the top surfaces start from the tail root apply the tape longer than the side, then stick it to the tape on the bottom cut the tape half to quarter of its width to cover tip of the cowl apply and overlap until all surfaces are covered smooth the tapes with small iron cover all stabilizers use cellotape as elevator hinge

make a connector for both elevator with small bicycle wheel spoke glue it to both elevator and wrap it with cellotape cover the vertical stabilizer wrap all surface with packing tape except the bottom part cut a gap in the center of the elevator to make way for vertical stabilizer attach horizontal stabilizer on the tail make sure it’s centered and then attach the vertical stabilizer use hot glue in 3 spots on the rudder to become hinges make sure all hinges can swift freely and strong cut the window part like in the video i use 0.3 mm mica plastik cover window part with white packing tape 3 coats then peel off the tape covering the window and leave the window frame attach the side window first, with UHU glue apply glue evently thin on 2 surfaces, leave it about 30 seconds then attach the window to fuselage take a look there’s about 2 mm distance from the edge of the fuselage to the window line with the same technique, attach the windshield attach it one side at a time make props for plastic window to the formers cut windshield former from plywood and paint it black on both sides attach former on the inside upper part of the windshield use UHU glue trace the windshield on paper cut and paint it black’ insert it back and glue it in place apply CA glue on the windshield and top cowl apply it thinly attach rear window i’m ran out of UHU so i use hot glue use ice cream stick for rear window former just like the windshield put painted black paper inside the rear window, to emphasize the window frame lines to look more scale i use eva foams to make stronger bonds for upper frame I use decal for guidance to mask the fuselage

for paint job use small 5 mm masking tape to mask window lines and cowl paint job mask the rest with bigger masking tape and newspaper cut battery hatch door according to plans and mark the front side on the door coat the edges of the door and hatch with packing tape so the existing tape will not peeled off sand all surfaces that will be paint on with medium 240 grit sandpaper coat thinly with PVA glue on the surface in circular motion with your finger paint with spray paint 2 coats thinly i use DITON strong blue do not open the masking yet score the paint lines with a sharp hobby knife to have a crisp and neat border remove the newspaper first and then remove the last masking tape carefully use knife to help the peel off process remove paint spots with sandpaper apply decals to decorate the plane the proper decals can elevate your model plane looks the good decals also can make your model plane look more scale especially if the decals match the real plane I use the longest bicycle wheel spoke that I can find

with 30 cm length and 2.5 mm diameter i also use foam wheel for rc plane 40 and 45 mm bend the wheel spoke wire like on the plans and then bend the root 90 degree to the back like in the video cut the wire leave about 3 cm coat the root of the wire with masking tape for easier glueing to the plywood base make holes around the root with 5mm interval sew the wire with nylon thread through the holes apply CA glue on the holes and thread coat the base with masking tape for painting make a stopper with nylon thread on the wheel shaft tip apply glue to the thread stopper by tilting the shaft downward so CA glue wont slip through the wheel shaft trim the thread with hobby knife attach main landing gear set, 1 cm from the back window frame trace LG base with pen on fuselage bottom with pen then peel off the tape with sharp knife glue the main LG set like in the video bend and shape wire for front landing gear as seen on the video 6,5 cm from the root to the wheel shaft glue front LG according to plans paint ice cream sticks with white measure the LG strut and cut the stick according to that coat it with white tape the wing is consist of 3 segments, middle segment and 2 side segments heat the bottom part for middle segment with heatgun and bend the front portion into curved shape by rubbing it againts a metal pipe mark spar and also CG position 5 cm from the LE attach an airfoil former on one of the edge glue 5mm foam spar trim the spar and glue another airfoil former make parts for wing strut base with 3mm plywood paint white 4 pieces of these plywood parts attach it with 10mm eva foam eva foam is the material for making flip flop sandals attach wingstrut base on the wing like on the video apply glue from the inside

puncture the eva foam with small screw driver so the wire from the wingstrut can easily inserted later sand the leading and trailing edge so it can receive the top part better install wing strut base on the fuselage just like on the video the hole is head up bend and curve top part of the wing with heatgun and metal pipe glue the leading edge first wait for the glue set at least a minute apply glue on several spots on top the spar and then apply glue on airfoil formers and trailing edge and then quickly push the top part down and press it until the glue is set about 2 minutes all steps must be quickly done before the glue cooled down with similar steps, assembly the side of the wing make holes on airfoil formers so servo cable can go through servo cable is too short you can add extension cable or solder it yourself with other cable make sure the servo arm already set on neutral position i choose soldering option make a servo hole then put the cut foam inside the cavity and glue it to prop the servo aileron servo are in opposite direction prepare the middle wing by sanding both sides insert servo cable into the middle segment and apply glue on one of the segment side combine the 2 segments with upsidedown position against the table leave it until the glue cooled down do the same for the other side sand leading and trailing edge into curved shape cut parts to make wingtip 4 ply for each wingtip stack 4 piece of foams into one block, make 2 blocks glue both blocks on each wingtips

trim the foam blocks to follow airfoil shape trace with wingtip plans and cut it sand wingtip into curved shape mark the screw holes with pen on top of the wing cut the aileron according to plans then cut on aileron’s root approx 2 mm wide so the aileron can move freely close the gap on the wing with 5mm foam cut the bottom side of the aileron 5mm wide be careful not to cut the upper side cut the cut piece 5 cm long and use it as a prop on aileron’s gap sand the aileron root like in the video cover the wing with white packing tape start from the bottom side smooth wringkle tapes with small iron continue cover on top side overlap the tape and then pull it down and stick it to the bottom tape cover the ailerons, wrap all surfaces don’t leave uncovered space glue aileron with 2 spots of hot glue to the wing and use celloptape as hinge peel off tape from aileron servo place the wing on top the fuselage make sure it’s on center and then apply black decal on the wing for the extension of the windshield on the real plane there’s an indentation on that place of the wing but we simulate it with decal apply registration number decal Papa Kilo Sierra Uniform Yankee put the wing on its place,

make sure it’s on the center and then insert 3cm gypsum screw for rear screw all the way until reach plywood frame on fuselage recheck and readjust the wing, if it’s still centered insert another screw on the rear use 5 cm screw for front wing mounting we’re going to make wing strut we need 3 ice cream sticks for each strut cut and remove the curved tip join 2 sticks with wrapping it with a piece of paper use lines on cutting mat for guidance cover the paper with CA glue to make it hard join with a stick to make it longer sand the paper until it blended with the stick measure the strut from the hole on the base on fuselage to base hole on the wing use steel wire, paper clip wire, to be added to wing strut bend and shape the wire like this wrap around the wire with sewing thread and apply CA glue make another wire for the other end cut mica plastic like this the same width as the strut puncture the plastic so the screw can be inserted use unused screws from servo paint it with white cut plastic with the size that can cover a pair of screw holes then glue it on top of it make way from screw with solder the plastics will protect the foam from repeated usage of the screw cover the plastic with white painted masking tape to make them look blended with the wing color also paint the screws white I use 50A esc, actually 30A is already enough but I only have this ESC left plug ESC cable to ch3 in RX polarity according to RX instruction don’t worry you if you reversed it, it won’t damage anything plug all 3 ESC cables to the motor if there are no plugs, you can buy them, it’s called banana golden plug or you can just solder it plug with any cable, it won’t damage anything we will test the motor rotation

first, turn on the TX make sure throttle stick is on the bottom attach masking as a flag on the motor shaft so we will know which way the motor rotates plug the battery on the ESC power cable and then push some throttle to test looks like the motor is reversed we need to switch 2 cables connection so the motor will reverse its rotation unplug the battery and turn off TX now we can install the propeller looks like the prop adapter shaft is too short my bought spinner can not be installed so i made my own with card make sure the tip of the spinner when rotate stays on the same place so the prop will be balanced unbalanced prop will lost a lot of power and will damage motor bearing in the long run this how to make the spinner trace spinner plans on top a card sheet i use art card from wasted desk calendar roll and assembly that 2 parts mark the propeller blade position and cut like this cut a hole according to plan on the back of the wing then pull out both aileron servo cables combine 2 servo cables into single output with Y cable or solder it close the hole afterward make a slit on aileron for control horn you can buy control horn from hobby shop or make yourself with any material i made from wasted DVD plastic box make a hole with solder for krustin terminal screw attach control horn to the aileron remove plastic cover from krustin terminal and use the metal part as stopper install krustin on horn cut pushrod wire as needed and shape one end like this i use wire from fiber optic cable you can use 1.5mm stainless steel wire, umbrella wire

or telephone wire backbone wire insert the end of the wire on servo arm and adjust neutral aileron position or we can adjust it later use long post or rod to do this i use fiberglass rod you can also use thread mark pushrod out position like this and make long slit for pushrod wayout install pushrod guide hose I use small plastic straw shape one end of pushrod with Z-bend insert it to servo arm insert pushrod wire from inside to outside and then glue the servo and put it on its place make slit on the elevator and attach control horn with short pushrod install stopper for joining 2 pushrods and adjust the neutral position make hole for rudder pushrod on top of tail you can see i made mistake making hole on the wrong side don’t repeat my mistake insert and glue plastic straw on that hole install the rudder servo like the other one attach control horn on pushrod position on the rudder and install short pushrod on the control horn use stopper for joinning 2 pushrods mark the cg position 5 cm from leading edge and then add small screw as a mark that you can feel it with finger make a hole 2×12 mm on the rear side of battery hatch door use a toothpick to make a lock like this wrap around with sewing thread and apply CA glue trim the stick make a pipe with paper or use small plastic straw attach slots to the front back side also attach props to support the door so it won’t fall down to the hole this model aircraft is done and ready for flight test assembly the plane first thing we need to plug aileron servo cable into channel one the receiver then screw the wing down

turn it upside down to attach the wing struts adjust the battery position so when the plane is weigh it’s level with the nose slightly down the nose a bit down for maiden flight we can adjust it later cg is on 5 cm from LE check control surfaces movement if aileron stick to the left, the left aileron must move up if elevator stick down, the elevator must move up for rudder, if stick to the left also the rudder ok the plane is ready to fly recheck cg one more time wow beautiful what? forward? i’ll turn it off Ok. it’s time for review

I am pretty satisfied with this plane it’s fly pretty well and responsive take off landing looks scale especially on take off Because it has no flap the landing is a bit fast, but still manageable with 2-3 take offs and landings you will get the hang of it Flight time also not dissapointed around 6-7 minutes with a healthy battery This plane is not for beginners it’s nice looking plane but not for beginners if you want to learn to fly, use Bango 1 Trainer look up my channel for it when you already mastered that trainer then you can fly this one now the cons the real plane has a dihedral on its wing wingtips are angled a bit upward This plane when we look for a distance the wing is too straight for me it’s pretty disturbing it’s not affecting flying but it’s less scale because I made the middle in one piece for easier building I want to cut this wing in the middle and make it dihedral one more thing it has tendency to fall to the side like this just like the 2nd landing it fell to the side too fast to stop and fell to the side the tips is you need to maintain throttle after touch down about 30% to keep the plane rolling until it eventually stop but if you just cut the throttle after touch down it will too soon to stop it will fall to the side also crosswing landing can cause that too maybe because

the distance between front and main landing gear is too close you can move front landing gear a bit forward but it will less scale ok that’s all, the rest is very good Like usual we’re going to talk about the next project about 1 month ago I already made a polls in my channel community tab Boeing 737 or Bombardier CL-415 the winner is CL-415 The next project the next big project we’re going to build CL-415 But this week I have something to do I can’t start the Cl-415 yet I will make a very simple project a windsock yes right we need windsock on the field as RC pilot we need to know wind direction in my field there are no more flags we need a windsock so next week (this sunday) we will make a windsock. ok see you on the next episode