Specifications

www.ripmax.com
Distributed to all good model shops by: See the full Ripmax range at www.ripmax.com
NEW ITEMS 2012
50
Displacement: 3.5cc (0.21cu.in.)
Bore: 16.27mm (0.640”)
Stroke: 16.8mm (0.661”)
Power Output: 2.8PS @ 33,000rpm
Practical RPM: 4,000 ~ 45,000rpm
Weight: 307.5g (10.85oz)
O.S Max 21XZ-M
L-OS13951 O.S. MAX 21XZ-M ........................................ £319.99
Based on the .21XZ-R
performance at the 2011
IFMAR 1/8 scale On-Road
World Championships -
the .21XZ-M Inboard
Marine Engine takes that
race-winning technology
and applies it to
dominating .21-size boat
competition! Many of the
performance features found
on the .21XZ-R are here;
and by utilizing a water-cooled cylinder
head and big-bore carb, the .21XZ-M will
assert itself on the water with the same resounding success!
O.S. GT33 PETROL
L-OS38300 O.S GT33 Petrol w/E-5030 Silencer ......... £369.99
Displacement: 32.98cc (2.013cu.in.)
Bore: 36mm (1.417”)
Stroke: 32.4mm (1.276”)
Power Output: 3.9PS @ 9,000rpm
Practical RPM: 1,800 ~ 8,000rpm
Weight: 1230g (43.4oz)
The second engine in the latest O.S. GT series of petrol engines
is designed for the new class of models that are emerging onto
the market that are specifically targeted at this size and type
of engine. Many of these models are sleek in design, so O.S.
has chosen a rear mounted Walbro carburettor with reed valve
induction.
The advantage of spark ignition petrol engines over regular glow
engines is the optimised ignition timing across the rev range
that will not change as load goes on and
off. Like its bigger brother, the GT-55, the
GT-33 is a purpose designed model engine
and is not based on a modified industrial
unit. The GT-33 has been optimised in both
internal and external shape to provide class
leading power and torque in a
compact, light package.
O.S. FS-62V
Displacement: 10.11cc (0.617cu.in)
Bore: 25mm (0.984”)
Stroke: 20.6mm (0.81”)
Power Output: 1.1PS @ 11,000rpm
Practical RPM: 2,400 ~ 11,000rpm
Weight: 442g (15.59oz)
The second engine in a
completely new series
of four strokes aimed
squarely at the sport
and scale modeller. Styling is
deliberately 'retro' and in keeping
with the style of the very first OS
four strokes. Far better silencing
is given from the included new
F-4050, baffled, twin chamber
silencer with an O-ring
seal between the cast
sections and variable
length header pipe.
L-OS30600 O.S. FS-62V w/F-4050 Silencer ................ £229.99
Dimensions (mm):
A: 44
B: 17.5
C: 102.8
D: 51
E: 105.1
F: 60
G: 34.1
H: 51.3
J: 87.5
S: UNF 5/16-24
Dimensions (mm):
A: 37
B: 21
C: 64.5
D: 45
E: 81.75
F: 44.5
G: 31.60
H: 33.5
J: 66.2
S: UNF 1/4 - 28
E-5030 ‘Pitts’ style silencer
included for unobtrusive yet
effective silencing with minimal
power loss.