Eric Robb RC Eric Robb RC RC Builds · Custom Parts · Backyard Engineering
← All projects
Project · Beginner

The 30-Inch Slow Flyer

A light, forgiving 3-channel foamie — undercambered wing, hand-launch, belly land. About as friendly as a scratch-built first plane gets.

30 inch scratch-built foam-board RC slow flyer at night

If you want a first scratch build that flies slow and forgives mistakes, this is the recipe. A 30″ undercambered wing makes lots of lift at low speed, the whole plane weighs about 264 grams, and at three channels (rudder, elevator, throttle) there's less to manage while you learn. No landing gear — you hand-launch it and belly-land it on grass.

Watch the full build and flights on YouTube.

▶ Watch the build video

Airframe

TypeRC park flyer
Wingspan30″ (76 cm)
Length30″ (76 cm)
Wing chord ≈6¾″ (17 cm)
Weight~264 g (9.3 oz)
Material5 mm Readi-Board foam
WingUndercambered, rubber-band mount
FuselageBox-style profile
TailConventional
Control surfacesElevator, rudder (3-channel)

Electronics

MotorEmax MT1806 2280Kv
ESCTurnigy Plush 30A
Propeller5×4.5 three-blade
ServosHextronik HXT900 9 g
TransmitterTaranis QX7
ReceiverRadioMaster R86C V2 6CH
BatteryOvonic FPV 850 mAh 3S LiPo

Setup & flying

Balance & assembly

  • CG: ~2″ from the leading edge
  • Reinforcement: tape on the nose and center of the wing
  • Servos: mounted as close to CG as possible
  • Landing gear: none — hand-launch and belly-land

Transmitter settings

  • Mode: 2 (throttle on left)
  • Expo: 30% (smooth for beginners)
  • Dual rates: elevator 70%, rudder 70%

What worked

  • Undercambered wing makes lots of lift at low speed — easy to fly slow
  • Light weight means gentle crashes and quick repairs
  • 3 channels keeps it simple while you're still learning the sticks

What to change next

  • ● Add ailerons once you're comfortable — it turns this into a sportier flyer
  • ● Best in calm to moderate wind; it's light, so gusts push it around
  • ● A little nose weight helps if it floats tail-low on the maiden

Build this — parts list

As an Amazon Associate, I earn from qualifying purchases. Links go to a specific product that matches the spec — check it against your build before buying.

Build a checklist for your plane New to RC? Start Here

Keep building