This is Axial's first .21 Cubic Inch / 3.47cc nitro engine to complement
the reputable RR Series of ABC (Aluminum piston - Brass cylinder liner -
Chrome plated) Designed Engines designed for the racing enthusiast,
from buggy basher to weekend race warrior. Starting with looks alone,
this engine stands out especially with the tech looking, "murdered out"
cross drilled head and crankcase.
Axial engines are dyno tested to ensure the highest level of performance
possible. We use the highest quality materials and the latest CAD and
CNC techniques to set the maximum level of quality possible at roughly
half the cost. The Axial 21RR-1 engine is aimed to provide the perfect
balance between performance and price to deliver the top overall value
for the enthusiast that likes to run hard and spend a little. If you are
looking for "the best bang for the buck nitro engine" the Axial 21RR-1
is for you!
Axial .21RR-1 Features:
- Precision machined all new crankcase was designed to be lightweight but still maintain strength and durability
- Cross drilled fins around cylinder wall provide better cooling efficiency while reducing weight up high
- Perfectly sized cooling head to provide proper cooling while lowering the weight
- Cross drilled fins help to further the weight reduction and lower the center of gravity
- The button head is fitted with a standard type glow plug button head makes it easier to tune
- 7 port engine sleeve design aids in the performance and torque of the engine
- Piston and sleeve materials were specifically selected to maintain the proper tolerances throughout the heat cycle range
- Lightweight aluminum connecting rod with brass bushings
- Precision
machined crankshaft has been counterbalanced with brass slugs to
provide a smoother running engine and reduce vibrations
- Silicone putty is used on the intake portion to smooth the gas flow and provide better engine performance and response
- All new 2 needle carburetor design makes it easier than ever to tune
- Markings on the idle, low speed needle, and high speed needle makes it easy to make adjustments in 1/16th turn increments
- Fully adjustable fuel valves as well as carburetor linkage makes it easy to install into any platform
- Precision machined aluminum venturis are included to aid in smoother gas flow
- Aluminum venturis also aid in tuning the motor for different tracks and environments to aid in longer run times
Spec Check:
- Size: .21 cubic inch/3.47cc
- Maximum RPM: 40,000
- Bore: 15.9mm
- Stroke: 17.5mm
- Heat-sink Head: Black Anodized
- Carburetor: 9.0mm Composite Slide Carburetor (includes 8.0, 7 & 6.5mm aluminum venturis)
- Carburetor Adjustments: 2 Needle, Flush Settings
- Connecting Rod: Dual Bushing
- Sleeve: 7 port
- Starting system: Bumpstart
- Weight: 338.5g/11.94oz
