Axial Racing 21RR-1 engine

Axial Racing have released the 21RR-1 engine, a new .21 nitro engine to compliment the reputable RR Series of ABC designed engines designed for the racing enthusiast, from buggy basher to weekend race warrior. The engine features an all new precision machined crankcase, cross drilled fins for better cooling and a tuned 7 port engine sleeve. A precision machined and counterbalanced crankshaft and all new 2 needle carburetor design complete the list of new features.

Crankcase
– 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
– Black coated to signify its overall look

Cooling Head
– Perfectly sized to provide proper cooling while lowering the weight
– Cross drilled fins help to further the weight reduction and lower the center of gravity

Button Head
– Fitted with a standard type glow plug button head makes it easier to tune
– Turbo Button head available as an option

Piston/Sleeve/Connecting Rod
– True ABC constructions adds to a longer engine life
– 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

Crankshaft
– 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

Carburetor
– 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

Bolt-in replacement engine for any .21+ engine mount

Source: Axial [axialracing.com]