How to Build an RC Plane from Plastic Bottles
Transform smooth plastic bottles and foam into a lightweight, aerodynamic RC airplane fuselage fitted with motor, servos, and control surfaces.
- Read the tools, materials, safety notes, and steps below for free.
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- Allow camera and microphone. Point your phone at the work; the coach watches your progress and tells you the next step.
🧰 Required Tools & Equipment
- ✓ Hobby utility knife
- ✓ Low-temperature hot glue gun
- ✓ Steel ruler
- ✓ Cutting mat
- ✓ Scissors
- ✓ Needle-nose pliers
📦 Materials & Supplies
- ✓ Two 1.5L or 2L smooth cylindrical plastic bottles
- ✓ 5mm foam board or Depron sheet
- ✓ Brushless outrunner motor and matching ESC
- ✓ Two 9g micro servos with control horns
- ✓ 1.2mm steel pushrod wire or bamboo skewers
- ✓ 2S or 3S LiPo battery with 2.4GHz receiver
- ✓ Matching propeller
⚠️ Safety Checkpoints & Warnings
- • Do not install the propeller onto the motor shaft until all radio binding and servo centering are fully completed.
- • Slice plastic bottles pulling the blade away from your body on a slip-resistant cutting mat.
- • Use low-temperature hot glue; high-temperature glue will deform and collapse thin PET bottle walls.
📋 Step-by-Step Guide (6 Steps)
Cut and Form the Bottle Fuselage
Slice the tapered bottom off the primary plastic bottle to create an open cylindrical fuselage body. Cut the nose section from a second bottle to form a streamlined nose cone that slides snugly over the front opening. Trim away excess plastic to achieve an overall fuselage length of roughly 35 to 45 centimeters.
- • A straight, uniform cylindrical plastic tube with cleanly trimmed edges.
- • A front nose cone piece that slides smoothly 1-2 cm over the main tube with no sharp burrs.
- • Cutting jagged lines due to blade slipping on curved PET plastic.
- • Using ribbed water bottles that create excessive aerodynamic drag.
Fabricate and Mount Wings and Stabilizers
Measure and cut a main wing (wingspan roughly 70-80 cm, chord 12-14 cm) and horizontal/vertical stabilizers from 5mm foam board using a steel ruler. Bevel the hinge lines of the ailerons and elevator at a 45-degree angle, then hinge them securely using clear packing tape. Ensure the main wing has a carbon spar or wooden skewer glued along its underside for structural rigidity.
- • Symmetrical main wing panel with a straight reinforcing spar embedded.
- • Control surfaces that flex freely up and down at least 30 degrees along clear tape hinges.
- • Hinging control surfaces too tightly, causing excessive servo resistance.
- • Omitting the spar, leading to wing folding under aerodynamic load.
Join Wings and Tail to the Plastic Fuselage
Cut matching slots through both sides of the bottle fuselage where the wing will seat, ensuring the slot aligns parallel to the fuselage centerline. Slide the wing through the slots and bond it in place using low-temperature hot glue. Glue the horizontal and vertical stabilizers squarely to the flattened tail end of the bottle, checking 90-degree alignment.
- • Wing sits perfectly level across the fuselage when viewed directly from the front.
- • Vertical stabilizer stands at a strict 90-degree angle to the horizontal stabilizer.
- • Gluing the wing with negative incidence or skewed left-to-right alignment.
- • Melting bottle walls with high-temperature hot glue.
Install Motor Mount and Powertrain
Cut a circular firewall from 3mm plywood or layered dense foam to match the inside diameter of the bottle's front neck or nose. Bolt or screw the brushless motor to the firewall, ensuring 1-2 degrees of right and down thrust angle. Securely glue the firewall into the nose of the bottle fuselage and route motor wires internally toward the cockpit bay.
- • Motor shaft protruding straight through the center of the nose opening.
- • Firewall firmly seated without flexing when motor housing is gently torqued by hand.
- • Installing the motor with upward thrust, which causes the plane to loop uncontrollably on throttle up.
- • Mounting motor screws loosely into thin plastic without a solid backing plate.
Fit Servos, Linkages, and Electronics
Cut small rectangular pockets in the fuselage or wing underside to seat the two 9g servos and glue them firmly. Connect the servo arms to control surface horns using stiff wire pushrods with Z-bends at both ends. Place the ESC, receiver, and LiPo battery inside the fuselage hatch, securing the battery with velcro so it can slide to adjust balance.
- • Pushrods run in a straight, direct line from servo arms to control horns without bowing.
- • Control surfaces sit perfectly neutral (flat) when transmitter trims are centered.
- • Using thin, flexible wire that flexes under aerodynamic pressure instead of moving the control surface.
- • Failing to power on and center servos electronically before gluing linkage arms.
Set Center of Gravity (CG) and Prop Installation
Mark the center of gravity on the underside of the main wing, typically 25% to 30% back from the leading edge. Balance the aircraft on two fingertips at these marks; slide the LiPo battery forward or backward inside the bottle until the plane rests level or slightly nose-down. Finally, securely fasten the matched propeller with its adapter nut.
- • Plane balances level on two fingertips positioned at the 30% wing chord mark.
- • Propeller firmly seated on the motor adapter with numbers/markings facing forward.
- • Allowing a tail-heavy balance (tail drops down when supported at the CG mark).
- • Installing the propeller backwards, resulting in massive loss of thrust.
Credit: inspired by an original tutorial by Crazy Think — watch the original on YouTube.
Don’t have everything?
- No Depron foam board? Flattened sheet plastic cut from extra rectangular juice bottles reinforced with barbecue skewers
- No 1.2mm steel pushrod wire? Straightened metal paperclips joined with heat-shrink tubing and thin skewers