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If you've ever watched a tricycle-gear trainer roll straight to the runway while your taildragger buddy fought a ground loop on the same crosswind, you already understand the core tradeoff in RC landing gear design. The geometry under your plane determines how it handles on the ground as much as any servo or radio setting — and getting it wrong is one of the most common reasons builds end in bent struts or a tipped nose.
This guide covers the three main landing gear families — fixed tricycle (nose gear), taildragger (tail wheel), and retracts — along with the supporting hardware ecosystem: tires, wheel pants, wire gauge, mounting methods, and sequencers. Whether you're choosing a first trainer and wondering why everyone recommends a nose-gear plane, or you're ready to fit your first electric retract set and want to know what will actually break first, this is the reference you need.
The answers here come from verified product specs, RCUniverse and Balsa Workbench community consensus, and the kind of field-proven detail that generic gear guides skip: concrete wire gauge numbers, weight-class product matching, the nose-gear-is-the-weak-link reality, and a clear upgrade path from fixed gear to pneumatic retracts with sequenced doors.
This guide is aimed at pilots who've moved past maiden-flight anxiety and are starting to think seriously about builds — whether that means upgrading a trainer, fitting a warbird kit, or finally adding retracts to a scale model that deserves them.
What Your Landing Gear Actually Does — and Why Type Matters
Landing gear isn't just a stand for your plane on the bench. It defines three distinct behaviors that vary dramatically between gear types:
Static ground stability. Will the plane sit level and resist tipping while you're setting up on the flight line?
Ground handling. How does it track during the takeoff roll and landing rollout? Does it self-correct or self-amplify yaw inputs?
Structural load transfer. Every landing puts a vertical impulse load through the struts into the airframe. That load path — how much flex is allowed, where the wire attaches, how thick the strut is — determines whether the gear absorbs the hit or the fuselage does.
The three gear families answer these questions very differently. Understanding the physics first makes every downstream decision — tire selection, retract choice, wire gauge — make sense rather than feel like guesswork.
Fixed Tricycle Gear — Why It's the Default Choice
How Tricycle Geometry Works
A tricycle gear plane has two main wheels set roughly under the CG and a nose wheel forward of the firewall. The CG sits ahead of the main gear contact points.
That geometry is self-correcting. If the plane yaws during a takeoff roll — say, a gust pushes the tail left — the drag on the outside main wheel creates a restoring moment that tends to swing the nose back into alignment. The airplane wants to go straight. The pilot assists, but the geometry is working with them.
This is why every training-grade RC plane uses tricycle gear. The E-flite Apprentice STS 1.5m, the HobbyZone AeroScout S 2, the FMS Easy Trainer — all nose-gear planes, all for the same reason. A beginner who overreacts to a gust gets a plane that self-damps their mistake rather than amplifying it.
Fixed Gear Hardware: What to Buy
For sport and aerobatic builds in the .35–.60 glow or equivalent electric class, the DU-BRO Super Strength Landing Gear is the reference fixed-trike unit. It's one-piece molded glass-reinforced composite — not bent aluminum — which means it resists deformation on hard landings rather than taking a permanent set.
Key specs: 14.5" (368 mm) wide × 4.5" (114 mm) high, 4.75 oz. The wide stance is intentional — wider mains resist tip-over when a wing drops on rollout.
No standalone Amazon ASIN is confirmed for this unit; search link below.
Check DU-BRO Super Strength Gear on Amazon
Installation notes from the builder community:
- Main wheels should sit slightly behind the CG on a tricycle setup — not directly under it — for proper nose-down attitude at rest.
- Nose-wheel steering throw should be minimal. A recurring beginner mistake is too much throw, which causes overcorrection oscillations during the roll.
- Nylon landing gear straps (Du-Bro makes sizes for 1/8", 5/32", and 3/16" wire) secure the strut to the fuselage saddle. Add rubber-band shims under the straps to absorb vibration and prevent screws from walking loose.
Taildragger Gear — What Actually Causes Ground Loops
The Physics of the Ground Loop
A taildragger puts the two main wheels forward of the CG and a small tailwheel aft. The CG now sits behind the main gear contact points.
That single fact reverses the self-correcting behavior entirely. If the tail swings left — same crosswind gust as before — the drag on the outside main wheel now amplifies the yaw rather than correcting it. The plane wants to swap ends. The pilot must stay ahead of it with rudder, catch the swing before it builds, and avoid differential brake while the tail is still flying.
This is called a ground loop, and it's the defining ground-handling hazard of the taildragger configuration. It isn't a pilot failing to be good enough; it's physics that require active management.
What makes it worse:
- Crosswind on rollout when the tail drops and rudder authority decreases
- Toe-out on the main gear (even a few degrees worsens the ground-loop tendency — toe-in of 2–3° is correct)
- A castering (free-swiveling, non-steerable) tailwheel on a plane without differential brakes — this combination does not work effectively
What makes it better:
- A steerable tailwheel linked to the rudder, so the pilot has positive directional control all the way to taxi speeds
- Wide main gear spacing (more leverage to resist a yaw)
- A short, snappy rollout to minimise the time spent in the high-risk window
Why Pilots Choose Taildraggers Anyway
None of this means taildraggers are wrong — they're the right choice in several situations:
- Scale accuracy. Most WWII warbirds (Spitfire, P-47, Corsair, Stearman) are taildraggers. A P-47 on nose gear looks wrong.
- Weight and drag. No nose strut, no nose wheel, no nose-gear bay if doing retracts — the tailwheel is tiny.
- Rough-grass performance. A taildragger sits nose-high on the ground, so the propeller arc clears turf that would catch a low-slung nose wheel.
- Skill development. Pilots who master taildragger ground handling become significantly better at rudder coordination overall.
The taildragger is not harder to fly — it's only harder to handle on the ground. In the air it's identical.
Tailwheel Hardware
Sullivan S860 Steerable Tailwheel Bracket (5–12 lb)
The standard steerable tailwheel bracket for .40–.60 class sport and scale builds. Two-bolt mount, spring-loaded linkage that absorbs ground bumps before they reach the rudder servo. Includes two springs — one heavy, one light (the smaller-diameter spring is stiffer, which the community confirms is counterintuitive). Tailwheel not included; 5/64" axle.
Rated for 5–12 lb aircraft. At this weight range, use the larger (softer) spring for grass operations — it's more forgiving of the kickback on rough surfaces.
ASIN: B0006O8PDE
Builder note from RCUniverse (RCKen): Don't machine down the plastic bracket — all the plastic is there to act as a breakaway fuse. The bracket is meant to be the failure point, not the rudder horn or fuselage. Reinforce the rudder mounting hole with thin-then-thick CA, and center the pivot on the rudder hinge line to prevent binding.
Du-Bro 375 Tail Wheel Bracket (.40 size)
Budget option for .40-size planes: lightweight nylon, requires a separate 3/4" tailwheel.
- Price: ~$8.99
- ASIN: B0043X6IP6
- Rating: 4.0/5 (37 ratings)
Not steerable — suited for planes where the tailwheel is linked to the rudder by a direct wire connection rather than a separate bracket linkage. Fine for light sport builds; the Sullivan S860 is the better choice if you're building a heavier scale warbird.
Wire Gauge Selection — The Number Everyone Skips
Music wire (piano wire) is the base material for scratch-built and kit fixed landing gear. Getting the gauge wrong means the strut bends, changes toe, and causes tracking problems — or breaks on the first hard landing.
The community rule of thumb from RCUniverse, corroborated by Flite Test field testing:
| Plane weight | Wire gauge |
|---|---|
| ~2 lb (0.9 kg) | 1/8" / 3 mm |
| 4–5 lb (1.8–2.3 kg) | 5/32" / 4 mm |
| 6–10 lb (2.7–4.5 kg) | 3/16" / 4.7 mm |
Important: 1/8" wire bends over time on 4–5 lb planes. This isn't a catastrophic failure — it's a gradual toe change that makes the plane pull consistently to one side during rollout. If you're chasing a directional problem on a built-up gear plane, check the strut toe before adjusting servo throws.
Single-wire gear must be stiff enough to resist fore/aft flex as well as side loads — fore/aft flex changes toe dynamically during the roll. A V-shaped double-leg or aluminum flat gear resists this better than a single bent wire.
K&S 520 Small Diameter Music Wire Assortment (20 pc)
The standard assortment for landing gear, cabane struts, and pushrods. Includes multiple gauges for selection.
ASIN: B001J6AHCA
Du-Bro 481 E/Z Bender
Bench tool for forming Z-bends, L-bends, and gear bends up to 90°. Works with wire below 0.062". Essential if you're forming gear from raw wire rather than buying pre-bent units.
- Rating: 4.0/5 (~34 ratings)
- ASIN: B003DNBE10
RC Tires — Foam vs Rubber, Sizing and Axle Conventions
Foam Tires
Closed-cell foam tires (Du-Bro Super Lite being the most common) dominate park-flyer and electric-sport builds. Advantages: very light, maintenance-free, won't puncture or go flat.
The honest tradeoffs, from the RCUniverse "Foam vs Rubber" thread:
- Foam takes a permanent set (flat spots) over time, particularly if the plane is stored on its wheels under load
- It absorbs fuel and oil — on glow-powered planes this accelerates deterioration; less of a concern on electric
- Foam has higher rolling resistance and lower lateral traction than rubber. On a taildragger this is counterintuitively useful: the increased rolling resistance mimics grass and adds directional stability
- Bounce on landing correlates more with descent rate and speed than tire compound — don't expect switching to foam to cure a floating-and-dropping landing
Du-Bro 300SL 3" Super Lite Wheels (2-pack) — lightest Du-Bro wheels, closed-cell foam, nylon hub.
Super Lite XL sizing (4–6" diameters): all 1.18" (30 mm) wide, 4 mm axle drillable to 1/4". Super Slim Lite option (3.0 mm / 0.118" axle) for ARF gear with narrow axles.
ASIN: B0006O8TJ4
Rubber Tires
Heavier than foam, more durable, better lateral grip. Worth the weight penalty on planes that operate from rough surfaces or heavier planforms. Less prone to flat-spotting in storage.
For most electric sport builds under 4 lb, the weight difference is negligible and the choice comes down to preference. For builds above 6 lb where wheel diameter matters for grass clearance, check manufacturer size recommendations.
Axle Sizing
Du-Bro wheels use a 4 mm (5/32") axle as standard, drillable to 1/4" for larger axles. Super Slim Lite uses 3 mm (0.118") for narrow ARF axle profiles. Match axle diameter to your retract or strut specification — a sloppy fit causes shimmy.
Wheel Pants — What They Actually Do
Wheel pants (fairings) are primarily a scale detail on RC planes. The speed gains are real but modest — full-scale homebuilt data cited in the community (from EAA guidance) suggests roughly a 6 mph gain on an RV-style aircraft with well-fitting pants, and RC planes scale proportionally. The visual difference is significant; the performance difference is not worth engineering around.
Hangar 9 Fiberglass Wheel Pants — fiberglass shells, sold as pairs, model-specific fitment.
ASIN: B005QIP8WQ (~$28 reference price)
Installation notes (from EAA guidance):
- Fiberglass pants need doubler reinforcements — aluminum sheet, riveted or epoxied — at the attachment bolt holes to distribute load. Attaching directly through bare fiberglass cracks under vibration.
- Maintain approximately 3/8" clearance between tire and pant opening. Too tight and the pant contacts the tire on any flex.
- Add a mud scraper strip at the pant opening on grass/turf strips. Mud packing into a wheel pant during a soft-field landing can stop the wheel entirely.
Skip wheel pants entirely on any plane that regularly operates from grass. The mud problem is chronic and the scale appearance is lost behind a muddy smear anyway.
Retractable Landing Gear — Is It Worth It?
The Honest Case For and Against
Retracts make the plane faster (a few mph), look dramatically better in the air, and add a satisfying operational complexity that many pilots enjoy. They also add weight, cost, and failure points — specifically in the nose gear, which takes the worst loads.
The community upgrade path is worth stating plainly: master your landings on fixed gear before fitting retracts. Retracts penalise sloppy technique hard — a firm arrival on nose gear puts the full landing load straight through the jackscrew, and a ground loop attempt on narrow-gear warbird retracts ends badly. Retracts are earned, not given.
Recommended first-retract planes: E-flite T-28 Trojan and P-51D in the 1.2m class — both have wide main gear spacing and a forgiving nose-gear geometry. Avoid narrow-gear variants (Spitfire) and avoid cheap no-name plastic retract sets as your first install.
Electric vs Pneumatic Retracts
| Feature | Electric | Pneumatic |
|---|---|---|
| Installation | Bolt in, plug to receiver | Air lines, tank, valve, fittings |
| Speed adjustment | Limited (voltage/ESC) | Tunable per leg with air valves |
| Fail-safe | Stays where it stopped | Spring-down options available |
| Nose gear weakness | Yes — jackscrew under load | Less acute (air cylinder spreads load) |
| Best for | ARFs, foamies, park-flyer warbirds | Giant scale, jets, heavy .60+ builds |
| Common failure | Jackscrew/PCB/housing (nose) | O-ring, air line fittings |
Electric retracts dominate ARFs and foamies because they're genuinely plug-and-play. Pneumatic retracts dominate giant-scale and jet builds because they lift heavy struts reliably, fail-safe options exist, and speed can be tuned independently per leg.
Quality matters more than type: "the failures come from cheap units" is the forum consensus across RCUniverse and Hobby Squawk. A well-sourced E-flite or Robart unit installed correctly is reliable; a $20 no-name set is not.
Electric Retract Selection by Weight Class
E-flite 10–15 Size Tricycle Electric Retracts (EFLG100)
Self-contained: no air, no extra servo, Y-harness included for single-channel control. Built-in over-current protection.
- Aircraft weight: 2.00–4.50 lb (0.90–2.00 kg)
- Strut diameter: 3 mm (0.118")
- Voltage: 4.8–7.4V; idle 5 mA / stall 200 mA
- Full set weight: 3.1 oz
- Price: ~$110–120
- ASIN: B002R5CBZ8
Widely used to convert ParkZone and E-flite foamie warbirds (T-28, P-51 park-flyer variants). The right starting point for a first retract install.
E-flite 15–25 Tricycle Electric Retracts (EFLG230)
Step up for heavier sport and scale builds.
- Aircraft weight: 4.00–7.00 lb (1.80–3.10 kg)
- Strut diameter: 3.5 mm (0.137")
- Speed: 1.25 sec @ 4.8V / 1.00 sec @ 6.0V / 0.75 sec @ 7.4V
- Unit weight: main 1.4 oz (39.5 g) each, nose 1.7 oz (48.0 g)
- Price: $124.99
- ASIN: B003QWJSXY
- Note: low stock at time of research — "Only 2 left in stock" on Amazon
Community note: nose-gear retract direction (forward vs aft swing) matters for geometry. One verified owner report notes the nose gear may swing the wrong direction out of the box — confirm with your fuselage geometry before final installation.
E-flite 60–120 85° Strut-Ready Electric Retract Mains (EFLG510)
For the largest electric-powered builds.
- Aircraft weight: 8.0–15.0 lb (3.63–6.80 kg)
- Strut diameter: 5 mm main, 4 mm nose (EFLG430 set reference)
- Unit weight: ~130 g (4.6 oz) each main
- ASIN: B00BD3ZF3K
Weight-Class Retract Summary
| Weight class | Recommended unit | Strut diameter |
|---|---|---|
| 2–4.5 lb | E-flite EFLG100 (10–15 size) | 3 mm |
| 4–7 lb | E-flite EFLG230 (15–25 size) | 3.5 mm |
| 8–15 lb | E-flite EFLG510 85° strut-ready | 5 mm main / 4 mm nose |
| .60 size up to 10 lb (pneumatic) | Robart 615 | 3/16" |
| Up to 50 lb (heavy electric) | Robart 150HD8E | 5/8" |
Pneumatic Retracts — Robart 615 95° Rotating Mains
The established pneumatic retract platform for .60-size builds up to 10 lb. Aircraft steel and glass-filled nylon construction; handles grass and paved fields.
Specs:
- Application: .60 size, up to 10 lb
- Strut: 3/16" wire
- Operating angle: 95° (current Robart spec — Amazon title still says "100 Degree," use 95° as correct)
- Air system: normal operating pressure 80–110 psi (Robart verbatim)
- Lubrication: white lithium or silicone grease only — other oils destroy the o-rings and void the warranty (Robart verbatim)
- Air tank reference: Robart #192 Large Air Tank, 43 cu in (704.8 cu cm), 3.334 oz, rated to 110 psi
- ASIN: B0006O7MUQ
Forum consensus: pneumatics are preferred by some veterans "by a wide margin" for ease of installation (air lines are forgiving to route) and the ability to tune each leg independently with air valves. Speed can be slowed for scale-rate deployment. The downside: they're happiest cycling firmly — slowing them too much with undersized valves makes them sluggish and inconsistent. Look for spring-down fail-safe options (Spring Air and equivalents) if building a jet where gear-up landing is catastrophic.
Avoid: the older Robart 600-series plastic mechanical frames on grass. The community position is unambiguous.
The Nose-Gear-Is-The-Weak-Link Rule
This deserves its own section because it catches pilots who expect their electric retracts to be bulletproof.
On a tricycle-gear plane, the nose gear retract carries the full taxi, takeoff torque, and cross-track load through its jackscrew and motor PCB. The main gear largely hang freely during the roll — they're mostly loaded vertically. The nose gear is loaded every direction simultaneously.
The failures that appear repeatedly in forum threads: stripped jackscrew, cracked retract housing, delaminated PCB from vibration, motor burnout from repeated actuations during a grass taxi.
Practical steps to reduce nose-gear retract failures:
- Limit grass taxiing on retract planes. Taxi on paved or hard-packed surfaces; position from grass to taxiway before extending nose gear.
- Land mains-first, every time. Even a slight nose-low arrival puts the nose retract in compression at its weakest point.
- Inspect the nose strut and retract mount after every flight session. Catch loosening before it becomes a strut-through-the-wing event.
- Run the correct voltage. Undervolting the retract below 4.8V means the motor strains harder and runs hotter on every cycle.
Sequencers and Gear Doors
If your scale build has gear doors — as most 1.4m-and-up warbirds and jets do — a sequencer is not optional. Without one, doors and gear cycle simultaneously, which means the door hits the retracting strut, the servo strips, or the door panel cracks.
A sequencer interposes between the receiver and both the retract unit and door servos, controlling timing so doors open before gear retracts, and close after gear deploys.
E-flite Retract Gear Door Sequencer (EFL01274) / Dave's R/C Sequencer
Dave's R/C unit is the one with verified builder specs:
-
Adjustable door-close delay via blue trim pot
-
Two operating modes: P-47 style (doors open and stay open while gear is down) and P-51 style (doors close after gear deploys)
-
Reduced door-servo speed for scale-rate movement
-
Microprocessor prevents the retract from cycling until doors finish their travel
-
Compatible with FMS, E-flite, and VQ retract systems
-
Price: $15.48 (from $15.48, 3 offers)
-
ASIN: B083P2DK5T
-
Rating: 4.5/5 (2 ratings)
-
Stock: low — "Only 2 left in stock"
→ Check current price on Amazon
Pilot-RC Controller: adds brake control and up to three door servos; auto-deploys gear if bus voltage drops below 7.4V (requires separate battery supply for the controller — use one).
DIY option: Flite Test published an Arduino-based sequencer. Viable if you're comfortable with microcontrollers; adds programming time and a failure mode (firmware).
Radio-only mixing: servo-speed curves and mix functions can approximate sequencing on proportional servos. Does not work with standard retract servos (not proportional). Results are inconsistent and not properly scale. Worth knowing about for testing; not a long-term substitute.
Common sequencer failure mode reported for FMS warbirds: DOA unit out of the box. Test on the bench before installing in the airframe.
Complete Product Quick Reference
| Product | Weight class | Price | Rating | Amazon |
|---|---|---|---|---|
| DU-BRO Super Strength Landing Gear | .35–.60 equiv. electric | n/a | n/a | Search |
| Sullivan S860 Steerable Tailwheel | 5–12 lb aircraft | not verified | 4.7/5 (3, eBay) | Link |
| Du-Bro 375 Tail Wheel Bracket .40 | .40 size | ~$8.99 | 4.0/5 (37) | Link |
| E-flite 10–15 Tricycle Retracts | 2–4.5 lb | ~$110–120 | not verified | Link |
| E-flite 15–25 Tricycle Retracts (EFLG230) | 4–7 lb | $124.99 | not verified | Link |
| E-flite 85° Strut-Ready Mains (EFLG510) | 8–15 lb | not verified | not verified | Link |
| Robart 615 Pneumatic Rotating Mains | .60 up to 10 lb | not verified | 0 reviews | Link |
| Du-Bro 300SL 3" Super Lite Wheels | park flyer / electric sport | not verified | not verified | Link |
| Hangar 9 Fiberglass Wheel Pants | .60–.90 scale | ~$28 | not verified | Link |
| K&S 520 Music Wire Assortment | all scratch-builds | not verified | not verified | Link |
| Du-Bro 481 E/Z Bender | all scratch-builds | not verified | 4.0/5 (~34) | Link |
| E-flite Gear Door Sequencer (EFL01274) | gear-door scale builds | $15.48 | 4.5/5 (2) | Link |
Note on prices and ratings: several legacy parts in this list (E-flite 10–15, Robart 615, Du-Bro 300SL, Sullivan S860) had unverifiable live pricing at research time due to low-volume third-party listings. Confirm before purchasing.
Which Gear Type Should You Choose?
Choose fixed tricycle if:
- You're a beginner or building a trainer
- You want the lowest maintenance and failure rate
- Ground handling simplicity is a priority
- The model was designed for nose gear (don't fight the design)
Choose taildragger if:
- Scale accuracy demands it (WWII fighters, biplanes, vintage designs)
- You're operating from grass and want better prop clearance
- You're at an intermediate level and want to develop rudder skills
- Weight and drag reduction matter (especially on lighter builds)
Choose retracts when:
- You can consistently grease landings on fixed gear
- The plane is a warbird or jet that looks wrong with visible gear
- You're at the intermediate-to-advanced level and understand the failure modes
- Your model is sized and structured for a retract bay (don't retrofit into an airframe not designed for it)
Gear type decision by pilot level:
| Pilot level | Recommended gear |
|---|---|
| Beginner | Fixed tricycle only |
| Intermediate (can land consistently) | Fixed warbird → electric retracts on wide-gear warbird |
| Advanced | Electric retracts, pneumatic retracts for .60+ scale |
| Giant scale / competition scale | Pneumatic with sequenced gear doors |
Field Fixes for Common Gear Problems
Bent strut (fixed gear)
Straighten on the bench in a vise with heat if music wire; aluminum struts are usually scrap. More importantly, check toe alignment with a straightedge after straightening — a corrected bend that left the gear toe-out will cause a persistent pull on rollout.
Retract not cycling (electric)
First check: is the channel reversed? Plug a standard servo into the same channel and confirm it moves on command. Second: inspect the over-current LED on the PCB if present (E-flite units have one). Third: cycle the unit on the bench under no load — if it works off the plane and fails in it, the strut is binding in the bay.
Shimmy (oscillating nose wheel during rollout)
Caused by a loose axle fit, sloppy nose-gear pivot, or incorrect nose-wheel steering throw. Reduce steering throw first — it's the most common cause. If shimmy persists, check the axle collar for wear.
Bounce on landing
Technique before hardware. A ballistic descent rate causes bounce regardless of tire compound. Nail the approach speed on a consistent landing profile (slightly above stall, flat approach angle, power reduction at flare) before changing tires. If bounce persists at correct technique, the gear may be too stiff — wire gear has no shock absorption; a rubber-band shim under the retaining strap adds a small amount.
Air leak (pneumatic)
Soapy water on every fitting. The leak is always where you least expect it, usually a compression fitting that appeared tight. Replace o-rings annually; lubricate with white lithium or silicone grease only — other lubricants destroy Robart o-rings.
Gear doors not sequencing (scale build)
If you don't have a dedicated sequencer: add one. Radio mixing is a stopgap, not a solution. If you have a sequencer and it's misbehaving: test off the plane, check that the door servo has enough travel to fully open before the retract starts cycling (adjust the delay pot), and verify that the sequencer's input signal is clean (some older receivers output noisy channels that confuse sequencer microprocessors).
Frequently Asked Questions
Q: Can I add retracts to any RC plane?
Not practically. A retract bay needs structural reinforcement around the mounting points, clearance for the strut to fold without hitting structure or control runs, and a channel assignment. Planes not originally designed for retracts typically lack all three. Some sport ARFs have an optional retract upgrade path; those are viable. Retrofitting an airframe not designed for it is usually more work than the result is worth.
Q: Why does everyone say to avoid Spitfire retracts for a first install?
The Spitfire's distinctive narrow inward-retracting gear has a very short lateral track — the distance between the two main gear contact points is small relative to the plane's wingspan. This makes it prone to tipping on any surface imperfection and reduces the restoring moment during rollout. It's a geometry problem built into the scale, not a specific product failure. First retract builds should use wide-gear warbirds: T-28, P-51, or similar.
Q: What's the difference between steerable and castering tailwheels?
A steerable tailwheel is physically linked to the rudder via springs or a direct pushrod — when the pilot applies rudder, the tailwheel turns to match. A castering (free-swiveling) tailwheel turns freely under the fuselage without pilot input. On a model aircraft without differential brakes, a castering tailwheel offers no directional control at taxi speeds and makes ground loops nearly guaranteed on any crosswind. Use a steerable setup on any taildragger you build.
Q: How do I know if my wire gear gauge is too light?
Inspect after every flight: sight down the nose from in front of the plane on a flat surface. If the tires point straight ahead, gauge and mounting are adequate. If either tire is toed out more than about 2°, the strut has taken a permanent bend under load. Replace with the next gauge up.
Q: Do I need a sequencer if my retracts don't have gear doors?
No. A sequencer's only function is to time the relationship between door servos and the retract actuator. Without gear doors, a single receiver channel drives the retract unit directly with no sequencing required. The Y-harness included with E-flite retract sets handles the main/nose simultaneous actuation on a single channel.
Q: Electric or pneumatic retracts for a 1.8m warbird?
At 1.8m and typical warbird flying weights of 8–12 lb, either is viable. Electric gives you a cleaner install and E-flite's 60–120 class units handle the weight. Pneumatic gives you tunable speed, fail-safe spring-down options, and better resistance to the continuous taxi loads that wear electric nose-gear jackscrews. If this is your first retract install at this size, electric is easier to set up and troubleshoot. If you're committed to scale operation from grass, pneumatic is the more durable long-term choice.
Conclusion
Landing gear is the part of the build that most pilots don't think about until it fails — usually at the worst moment on a grass strip with crosswind. Understanding the physics behind gear type selection (CG-ahead vs CG-behind, and what that means for ground loop tendency) turns gear selection from guesswork into an engineering decision.
The practical hierarchy is clear: fixed tricycle gear for learning, taildragger when scale demands or pilot skill justifies it, retracts when landings are already consistent and the model is designed for them. Wire gauge must match weight — 1/8" for ~2 lb planes, 5/32" for 4–5 lb — and nose-gear retracts require active management (mains-first landings, limited grass taxi, regular strut inspection) regardless of brand or price.
For specific build decisions — choosing a first trainer with solid gear geometry, landing technique to protect your retracts, understanding servo requirements for your retract channel — the following articles cover the adjacent ground:
- How to Build an RC Plane from Scratch — step-by-step for complete builds including gear selection
- How to Fly an RC Plane: Complete Beginner's Flight Guide — landing technique that protects retracts
- RC Plane Flight Controller Guide — stability and servo integration for retract channels
Get the gear right and the airframe stays intact long enough to get good at flying it.
