Twin-Engine RC Planes: Prop and EDF Twins Compared

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A twin-engine RC plane looks impressive on the flight line, but it is not a single-engine plane with an extra motor. A second motor changes how the airplane takes off, how it yaws and what happens if something goes wrong. This guide covers the twins that are actually in stock, from a 43 g micro to scale prop twins and twin ducted-fan jets. It is based on manufacturer specifications and product manuals, not on our own flying. Prices are left out because they change often, and stock was checked in October 2026.

Several famous twins have changed status, so a few old favorites appear below as discontinued rather than as picks.

Quick picks

What changes with two motors

Three things are different from a single, and the manuals touch all of them.

Yaw control on the ground and in the air. E-flite's twin BNF models use differential thrust. As the Twin Otter manual puts it, "when the rudder is applied one motor will increase speed and the other will decrease speed to assist with yaw control." This helps ground handling, takeoff and landing. For maximum control, E-flite suggests raising the throttle trim about 3 to 5 clicks until the motors just start spinning, then lowering it until they stop, so rudder input can spin one motor even with the throttle at idle. That trim setting means throttle cut must be on whenever the airplane is handled, because a motor can start unexpectedly.

Electronics. E-flite's twins use a single dual ESC, such as the Avian Dual 25 A Smart Lite in the Twin Otter, the Avian Dual 40 A in the Beechcraft and the Avian 40 A Dual Smart Lite in the A320neo. It is wired at the factory and runs both motors from one battery. Dynam's B-26 Marauder is different: it carries two separate 40 A ESCs, one per motor. Anyone building a twin from parts has to plan for two motor outputs and how the throttle signal is split. The motors guide and the ESC guide cover the parts.

Thrust reversing. Several twins offer it for taxiing and shortening the roll after landing. The manuals are firm about it: "Never attempt to use thrust reversing in flight. Applying reverse thrust while in flight will result in loss of control and possibly a crash." E-flite also warns against assigning thrust reversing and SAFE Select to the same transmitter channel.

Prop twins

HobbyZone Duet S 2. A ready-to-fly micro with a 20.6 in (523 mm) span, EPS foam, brushed motors on a 1S battery and a weight of 43 g with its battery. Horizon lists Beginner and Experienced modes. Battery and charger are in the box. It is the lowest-risk way to feel how a twin behaves, because it is light and cheap to repair. The older HobbyZone Duet is discontinued.

E-flite DHC-6 Twin Otter 1.4m. A high-wing scale twin with a 57.1 in (1,450 mm) span, flaps, nav and landing lights, two 2830-950Kv motors and 3S or 4S 2200 to 3200 mAh power. It weighs 1,665 g without a battery and 1,895 g with a 4S 2200 mAh pack. Horizon calls it "the perfect first twin-powered model for intermediate to experienced RC pilots", which is a maker claim, and lists it at skill level 3 as BNF Basic with AS3X+ and SAFE Select and level 4 as PNP. Float combos are in stock too, and the floatplane guide covers flying from water. The manual suggests a 4 minute flight timer with the recommended battery, or 6 minutes for first flights on a 4S 2200 mAh pack, and says to attempt first flights in low rate and use high-rate elevator for landings.

E-flite EC-1500 Twin 1.5m. A cargo-style twin with a 60.12 in (1,527 mm) span, two 3720-650Kv motors turning 10 x 9 five-blade counter-rotating props, a functional cargo door and a recommended 4S 4000 mAh pack. At 2,755 g with its battery, it is a heavier airplane. Horizon says the flight envelope runs "from slow and scale-like to sport flying and even aggressive 3D aerobatic capabilities", and that it can operate from paved, grass and dirt surfaces, snow with the included skis, or water with optional floats. Skill level 3. The BNF Basic and PNP were in stock under the current SKUs, while the original EC-1500 listings are discontinued.

E-flite Beechcraft D18/RC-45J 1.5m. A scale "Twin Beech" with a 59.2 in (1,504 mm) span, retractable gear, flaps, two 3226-930Kv motors and an Avian Dual 40 A Smart ESC. It weighs 1,858 g without a battery and 2,266 g with a 4S 4000 mAh pack, and Horizon lists it at skill level 3. BNF Basic and PNP were both in stock in October 2026.

E-flite Twin Timber 1.6m. A STOL-style twin with a 63.58 in (1,615 mm) span, two 3536-750KV motors, flaps, leading-edge slats and optional floats. Horizon calls it "the most capable, durable and stable Timber yet". It weighs 2,588 g with a 4S 3200 mAh pack and is skill level 3. The BNF Basic was in stock, and the PNP is discontinued.

Dynam warbird twins. Dynam's own store sells a B-26 Marauder with a 1500 mm span, 2,350 g flying weight, two 650KV motors, retracts and a 4S 3200 mAh pack, a P-61 Black Widow and a Bf-110 V3. Dynam lists its B-26 and Bf-110 as Intermediate. The warbird guide covers single-engine warbirds, which are the sensible groundwork first.

Models that have gone: the E-flite UMX Aero Commander and UMX B-25 Mitchell, the Twin Otter 1.2m with floats and the SU-30 are discontinued at Horizon, the UMX Twin Otter was on backorder, and the FMS B-25 Mitchell 1470mm is discontinued there too. Check the makers directly before assuming a model is gone for good.

Twin EDF jets

Twin ducted-fan jets put the fans close together near the fuselage, which keeps the geometry compact. The EDF jet guide and the best jets guide cover single-fan jets, and both are the usual groundwork.

E-flite A-10 Thunderbolt II Twin 64mm. A 45.24 in (1,149 mm) span, two 2840-2200Kv motors, retracts, flaps and 6S 3200 to 4000 mAh power. Weight is 1,732 g without a battery and 2,324 g with a 4000 mAh 6S pack. Horizon lists skill level 3 and an approximate flight time of 3.5 to 4 minutes, which is short enough to plan around.

E-flite Airbus A320neo Twin 64mm. The big airliner of the group: a 59.9 in (1,521 mm) span, a length of 62.2 in (1,580 mm), 2,954 g without a battery and 3,685 g with a 6S 5000 mAh pack, retracts, flaps and an Avian 40 A Dual Smart Lite ESC. It is officially licensed by Airbus. Horizon lists skill level 3 and claims class-leading flight times on 6S packs from 3200 to 7000 mAh, which is a maker claim. The BNF Basic, a white version and the PNP were all in stock. The airliner guide covers more models like it.

E-flite F-14 Tomcat and SR-71 Blackbird twins (40mm). The F-14 has a 30 in (762 mm) span, weighs 18 oz (510 g) without a battery and runs on 4S. The SR-71 has a 19.88 in (505 mm) span and weighs 29.4 oz (834 g) with its battery on 4S. Horizon lists both at skill level 4, and both were in stock. The Micro B-2 twin 30mm (33.6 in span, 3S, skill level 3) was also in stock. These are showpieces rather than starting points.

Engine-out: what the sources say

Every guide to twins eventually discusses a motor quitting, so it helps to be clear about what the maker documents.

For full-scale airplanes, the FAA Airplane Flying Handbook says the loss of half of the power reduces climb performance by 80 to 90 percent, in some light twins to the point where climbing or even holding altitude is not possible, and that the remaining thrust is asymmetrical, which creates a control problem. NTSB Safety Alert SA-081 restates the same figure. A second engine is therefore not a safety margin by default.

For RC twins, the maker manuals say nothing about an engine-out procedure. What they do document is relevant:

• Differential thrust helps with yaw control at low speed, but it works through the throttle, not as a failure recovery.
• Thrust reversing must never be used in flight.
• SAFE Select and AS3X ease the workload of flying, and Horizon's manuals present them as aids, not as a cure for a failure.

Beyond that, any advice about what to do when a motor stops is general technique rather than a documented procedure. Sensible preparation is to practice at a safe altitude with an instructor or a simulator, keep the airplane in a configuration where a loss of one motor is survivable, and avoid low, slow turns. If the airplane has motors spread widely on the wing, the yawing effect of a failure will be larger than on one with the motors near the fuselage, which is a reason to prefer twins with close-set motors for a first.

Gear and batteries

Twin power systems are matched to the packs the makers name. The Twin Otter wants 3S or 4S 2200 to 3200 mAh with an IC3 connector, the EC-1500 uses a 4S 4000 mAh pack, and the jets use 6S packs with IC5 connectors. The LiPo guide covers storage and charging. E-flite's twin BNF models name a Spektrum DSMX/DSM2 compatible transmitter, with 5 to 8 channels depending on the model, and PNP versions let another brand's receiver be used if it supports the throttle setup. Differential thrust and thrust reversing need a Spektrum receiver with Smart throttle on PNP versions, so check before buying a different radio. The beginner flying guide is a good place to start for pilots who have not yet flown a single.

Which twin to buy

A first twin. The Duet S 2 for the feel of it, then the Twin Otter 1.4m as the scale step.

A versatile sport twin. The EC-1500 Twin 1.5m, or the Twin Timber 1.6m for STOL-style flying.

A scale classic. The Beechcraft D18/RC-45J 1.5m.

A twin warbird. A Dynam twin from the maker, after single-engine warbird time.

A twin jet. The A-10 Twin 64mm first, then the A320neo.

Frequently asked questions