RCGF 61cc BM Single Cylinder 2 Stroke Gas Engine | 6.0HP High Torque Motor for 50cc-60cc RC Airplanes
Hero Section: Unlimited Vertical Performance
There is a moment in every pilot's journey when "enough" power is no longer enough. You want unlimited vertical climb. You want to hover at half-throttle. The RCGF 61cc BM is the answer. This isn't just an engine; it's a 6-horsepower adrenaline pump designed for 50cc to 60cc class aerobatic aircraft and warbirds. With the upgraded "BM" series manufacturing precision, this engine delivers the raw torque of a chainsaw with the reliability of a Swiss watch. It’s time to stop flying on the wing and start flying on the prop.
Why Choose The RCGF 61cc BM?
- Raw, Unadulterated Torque
While twin cylinders offer smoothness, the single-cylinder 61cc offers brute force. Producing 6.0HP at 7500rpm, it provides the instantaneous throttle response needed for aggressive 3D maneuvers like torque rolls, waterfalls, and harriers. It’s the "muscle car" of RC engines.
- The "Gold Standard" Components
Reliability is non-negotiable at 500 feet. That’s why the RCGF 61cc comes pre-equipped with a genuine Walbro Carburetor and an NGK-CM6 Spark Plug. These industry-leading components ensure easy hand-starts, a rock-solid idle at 1500rpm, and consistent fuel delivery during high-G maneuvers.
- Optimized Cooling & Durability
The "BM" designation signifies a robust build with enhanced cooling fin geometry. This ensures efficient heat dissipation even during slow, high-load 3D flying, preventing heat fade and extending the life of the piston and ring.
Technical Highlights: Under the Cowl
- Precision Piston Valve: The engine utilizes a classic 2-stroke piston valve design. This simplicity means fewer moving parts, lighter weight, and easier maintenance compared to rotary valve engines.
- Intelligent Ignition: The included DC-CDI ignition module features automatic timing advance. It adjusts the spark timing based on RPM, ensuring you get easy starts and maximum power efficiency at full throttle (Requires 6-8.4V).
- Power-to-Weight Ratio: With a host weight of only 1367g but a static thrust of over 15kg, this engine offers an incredible power-to-weight ratio, allowing you to build a lighter plane that flies better.
Specifications
- Product Name: RCGF 61cc BM Single Cylinder Gas Engine
- Displacement: 61cc (3.66 cu in)
- Bore x Stroke: 47mm x 35mm
- Max Power: 6.0HP @ 7500 RPM
- Static Thrust: 15kg (33.1 lb) @ 100m altitude
- Carburetor: Walbro (Diaphragm Pump)
- Spark Plug: NGK-CM6
- Ignition Voltage: 6V - 8.4V DC
- Fuel Mix: Gasoline : 2-Cycle Oil (30:1 Recommended)
- Recommended Props: 23x10, 24x8
- Main Engine Weight: 1367g (3.01 lb)
Usage Scenario: The 3D Demo
You secure the canopy. Your spotter holds the tail. You flip the prop—Pop, Bang, Purr. The 61cc settles into a rhythmic idle. You taxi out and punch it. The tail lifts instantly. Within 50 feet, you pull back, and the plane rockets vertically, accelerating as it climbs. You push the nose over into a flat spin, the engine screaming. As you recover, the Walbro carb never misses a beat. This is the confidence that comes from flying with surplus power.
Important Tips & Expert Advice
- Propeller Selection: For 3D flying (low speed, high thrust), we recommend a 24x8 prop. For Warbirds or sport flying (higher speed), a 23x10 is ideal. Always balance your props to protect the engine bearings.
- Tuning the Walbro: Don't be afraid to tune. If the engine hesitates on transition, the Low (L) needle may be too lean. If it burbles at full throttle, the High (H) needle is too rich. Make small adjustments (1/8 turn) at a time.
- Oil Ratio: During the break-in period (first 2 gallons), use a high-quality mineral-based 2-stroke oil at 30:1. After break-in, you can switch to synthetic oil, but keep the ratio rich (30:1 or 40:1) to ensure longevity.
Customer Support
From tuning advice to replacement gaskets, we are here to keep you flying: service@helloworld7.com
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