This is the Novarossi Rex 91HR 3D - V2 8-Port Standard Plug Helicopter
Engine, with an H9 491 Tuned Pipe combo. With many prototype iterations, Novarossi has designed a
completely new 3 Needle carburetor to take Novarossi helicopter engines
to a new level of performance. This new 3 Needle carburetor will provide
optimum tuneability, power and performance, and is easier to tune when
you're trying to extract all the power from the engine. This is achieved
by using a thermal insulator on the carburetor bushing that insulates
the carburetor body from crankcase heat, to help reduce the possibility
of vapor-lock. A "Dykes" type piston ring has been used to improve the
sealing between the piston and the cylinder, the sleeve has 8 transfer
ports and is made from high quality iron, and the back plate has been
optimized to reduce the dead space inside the crankcase.
The H9 tuned pipe set (50491-491) has been designed for use with the Novarossi R91HR 3D
helicopter engine, but is also an excellent pipe for O.S. 90
size heli engines.
Features:
- V2 Cooling Head: The V2 cooling head of the
R91HR 3D V2 engine is made from aluminum that is been chosen for its
heat conducting capacity. The New R91HR 3D V2 cooling head is
"Carb-Smart" ready and has a new shape to fit perfectly into any heli
cooling shroud.
- Piston Ring: The "Dykes" type piston ring has
been implemented to improve the sealing between the piston and the
cylinder.
- Connecting Rod: The connecting rod is made from
a super light aluminum which has been ultrasonically checked to prevent
premature failures. The specific form creates little turbulence inside
the engine which aids the internal gas-flow.
- Sleeve: The sleeve has 8 transfer ports and is
made from iron.
- Crankcase: The crankcase is made from a special
alloy, developed by Novarossi to achieve the best possible strength to
weight ratio. This crankcase is made to standard dimension in order to
fit most helicopters.
- 3 Needle Carburetor: This engine has an
carburetor with an rotary throttle valve and comes with a 11mm body. It
features a simple Min/Med/Max mixture adjustment.
- V2 Edition Rear Cover: V2 Rear
Cover was redesigned to allow the Spektrum RPM sensor installation and
is compatible with previous REX 91 HR 3D engine edition.
- Crankshaft: The crankshaft is made from high
quality steel and is available in Turbo 5/16" x 24 version.
- Rear Ball Bearing: The rear ball bearing of
this engine is made from high quality steel.
- Combustion Chamber: This combustion chamber has
a semi spherical shape, in combination with the centered glow plug,
Novarossi has created the most effective combustion process possible.
- Glow Plug: Standard Heli Glow Plug. All brands
of Heli Glow Plug can be used. Medium/Hot and Hot Plugs are advised.
Specifications:
Displacement: 14.98cc
Max
Power: 3.60 HP
RPM (max power): 16,500
Practical
RPM: 800 ~ 19,000
Bore x Stroke: 27.7mmx24.8mm
Number
of Transfer ports: 8
Crankshaft: 18mm -
5/16" x 24
Carburetor: 11mm Bore Rotary - 3 Needle
(min/med/max)
Advised Novarossi plug: Standard HR2
(hot)
Advised Nitro %: Advise 10% ~ 30% Nitro
Weight:
580gr |
