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Our
engines, technical data and describtions Overview and Background Scale
model raceboats – called powerboats – became bigger
and bigger in the last few years. We suppose at first, that the owners want
to see something big on the water and second that big boats can better handle
big waves. And: sometimes bigger is better…… An arms
race began and the engines became bigger, stronger also and more than one was
installed in a big boat. But: if the modelling enthusiast wants to build a
really big boat like a 84” Apache, these little engines were a bit too small.
Even some modelers decided to install
scooter-engines into their boats. These engines have large displacements and
are heavy metal monsters. Plus: massive pistons and rods may cause big
vibration issues. Remember:
we are talking about modelling……. Years
ago multi-cylinder nitro engines have been introduced. We suppose that caused
by carb adjusting issues and costs these are low in count worldwide. To improve
this situation we decided to design and build a multi cylinder powerhouse
family. Our
engines are based on the very robust and well known Japanese ZENOAH 260PUM
and their followers like 290PUM or RCMK. Since
2017 we are using parts of ZENOAH 290PUM only. Out of these mass production
engines the following original parts will be used after checking and
partially improving: On CNC-machines we perform some
modifications to increase the output power. All engines will be installed on a test rig before
shipment, carbs will be adjusted. For symmetric packages (if 2 engines will be used) a
mirror like (symmetrically) assembly could be done on customer's request.
Rotating direction is selectable also. Support:
all our
customers will get an installing and run-in support on request for free via
mail.
The powertrain
components: 1. RAT
HOUSE engine (powerplant) 1.1. crank house and mounts All
parts will be milled out of strong aluminium and could be anodized on
customers request. Watercooling of the housing is
recommended and prepared. 1.2. crank shaft is 100% new designed, because we do not
like to connect the mass production cranks with clamping or key technique.
The hardening was done with help by formula 1 technicians in Switzerland. 10
ball bearings are on the RAT’s crank. The bearing suppliers are INA or
FAG. 1.3. ignition We use the self developed electronic
ignition Power-Spark (see web-catalog). Caused by
this we do not need to install both red source coils and very slim assemblies
are possible from now on. 2. RAT
HOUSE exhausts 2.1. tuned pipes All existing power pipes on the market
will fit to RAT HOUSE. 3. RAT HOUSE clutch Worldwide the 52mm clutch is in usage,
this clutch will be used in model cars also. Caused by the big power and
torque of RAT HOUSE the recalculation showed, that we have to use a bigger
65mm one, see web-catalog. 4.
RAT HOUSE transmission/gearbox Caused by the power of RAT HOUSE it would
be impossible to make a single prop configuration w/o any rpm change. A splitter
gearbox was developed which could be ordered with 28% more rpm at the
outputs. Possible usage: - with 2 counter rotating output shafts, called
splitter, could be installed in 2 different positions w/o disassembling:
inside or outside rotating propellors - only with one output, rpm increase - only with one output, rpm increase plus
counter rotating Techical data: - shafts are completely ball beared (6 ball bearings) and hardened - gears and shafts in a one piece design - oil lubricated - shaft seals - power capability up to 40hp, with mild mods up to 50hp. Each single assembled powerplant
will perform a test run on a bench and the carbs will be pre-tuned.
RAT HOUSE could be installed in other
vehicles:
pics with friendly release by Siggi Hartmann MOUSE HOUSE, the
2-cylinder engine (pics
by Henry Dietrich):
The powertrain
components: 1. MOUSE HOUSE engine (powerplant) 1.1. crank house and mounts All
parts will be milled out of strong aluminium and could be anodized on
customers request. Watercooling of the housing is
recommended and prepared. 1.2. crank shaft Is 100% self designed, because we do not
like to connect the mass production cranks with clamping or key technique.
The hardening was done with help by formula 1 technicians in Switzerland. 6
ball bearings are on the MOUSE’s crank. The bearing suppliers are INA or
FAG. 1.3. ignition Engines will be prepared for the mass
production CDI ignition of ZENOAH. or we deliver with the electronic ignition
Power-Spark (see web-catalog). Open homepage in a new
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