1/4 Scale Running Model Offenhauser (Offy) Engine By Ron Colonna
1/4 Scale Offy 270
This is a 16 valve double overhead cam powerhouse, with pressure oil feeds
and dry sump lubrication. It is faithful to the prototype and uses the
famous cup type followers. Eleven inches long and seven inches high. 1.032"
Bore x 1.094" Stroke. 60 cc Displacement. (3.66 cubic in.) Compression
ratio is 9.5:1. Uses solid state spark ignition. (Hall Effect with dual
I knew a little about the famous Offenhausers, hearing about their
conquests at the Indianapolis Speedway while growing up. I didn't get
interested in building a copy of one until approached by Bob Washburn after
doing my Cirrus article for SIC magazine. At the time Bob was looking for
someone to develop the model, do the basic drawings, write machining
instructions, and build two copies of the finished engine, in a one year
time frame. He sent me all the data he had aquired at the time. I looked it
all over, but had to send it all back. I was busy on other projects and it
seemed a daunting task that I was sure I couldn't accomplish. I didn't
forget the engine though, and some years later, a gift of Gordon White's
book on the Offenhausers from my eldest son, put me in the frame of mind to
give Bob's proposal a try, but on easier terms. It took me two years to do
it all and I only built a single copy of the engine. I put my drawings and
machining instructions in book form and published it myself. It has been a
successful venture, but I was right about it being a daunting task. I'll
most likely never try doing anything like that again. The engine has been,
and is being built in many parts of the world. My copy has been running for
eight years now and is a fine performer with the throaty roar of it's full
Ferrari V12 Engine
Ferrari V12 Engine Assembly. From start to finish, one technician is
responsible for the assembly........
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Scale Model Running Challenger Flathead V8 By Ron Colonna
Bore: 1 in.
Stroke: 1 in.
Displacement: 100 cc
Max RPM: 6,000
This engine was built early in my gasoline engine building career. I
received the castings and drawings as a Christmas gift from my wife. I had
it running about five months later. This is the engine that creates the
most interest at the shows. So much so that I've had to rebuild it twice
because of wear. As designed, it had some major shortcomings. The conrods
were bronze castings which promptly wore grooves in the crank. These were
replaced with rods machined from 2024 aluminum. Pistons were remade and the
engine fitted with rings made from the George Trimble method. Oil control
rings are a necessity as the engine smokes badly without them. An electric
start system was added and the engine now runs with the push of a button.
mini V12 Motor private Präsentation
V12 ARTUS Motor. Private Vorführung vor Freunden
Private presentation in front of friends our known Artus V12 engine. can
you acept on this prototype test something is not in perfect funktion
Il motore più piccolo del mondo V12
Il motore V12 più piccolo del mondo, pazientemente autocostruito. Un
esempio di grandissima passione concentrata su un micromotore.
The world's smallest V12 engine, homebuilt patiently. engine in miniature
Artus mini V12 Motor Sound
V12 Modellmotor. we build this engine by self. please visit my website
-- http://www.artus-motor.com/ --
Awesome V12 Monster diesel engine Awake and Alive startup
Awesome V12 Monster diesel engine Awake and Alive startup
The first V-type engine (a 2-cylinder vee twin) was built in 1889 by
Daimler, to a design by Wilhelm Maybach. By 1903 V8 engines were being
produced for motor boat racing by the Société Antoinette to designs by
Léon Levavasseur, building on experience gained with in-line four-cylinder
engines. In 1904, the Putney Motor Works completed a new V12 marine racing
engine -- the first V12 engine produced for any purpose. Known as the
'Craig-Dörwald' engine after Putney's founding partners, the engine
mounted pairs of L-head cylinders at a 90 degree included angle on an
aluminium crankcase, using the same cylinder pairs that powered the
company's standard 2-cylinder car. A single camshaft mounted in the central
vee operated the valves directly. As in many marine engines, the camshaft
could be slid longitudinally to engage a second set of cams, giving valve
timing that reversed the engine's rotation to achieve astern propulsion.
"Starting is by pumping a charge into each cylinder and switching on the
trembler coils. A sliding camshaft gave direct reversing. The camshaft has
fluted webs and main bearings in graduated thickness from the largest at
the flywheel end." Displacing 1,119.9 cuin (18,352 cc) (bore and stroke
of 4.875" x 5" (123.8 x 127 mm)), the engine weighed 950 pounds (430 kg)
and developed 150 bhp (110 kW). Little is known of the engine's
achievements in the 40-foot hull for which it was intended, while a scheme
to use the engine to power heavy freight vehicles never came to
fruition. One V12 Dörwald marine engine was found still running in a
Hong Kong junk in the late-1960s.
Two more V12s appeared in the 1909-10 motor boat racing season. The Lamb
Boat & Engine Company of Clinton, Iowa built a 1,558.6 cuin (25,541 cc
(5.25" x 6" (133.4 x 152.4 mm)) engine for the company's 32-foot Lamb IV.
It weighed in at 2,114 pounds (959 kg). No weight is known for the massive
3,463.6 cuin (56,758 cc) (7" x 7.5" (177.8 x 190.5 mm)) F-head engine built
by the Orleans Motor Company. Output is quoted as "nearly 400 bhp (300
By 1914, when Panhard built two 2,356.2 cuin (38,611 cc) (5" x 10" (127 x
254 mm)) engines with four-valve cylinder heads the V12 was well
established in motor boat racing.
In automobiles, V12 engines have not been common due to their complexity
and cost. They are used almost exclusively in expensive sports and luxury
cars because of their power, smoother operation and distinctive sound.
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http://www.artus-motor.com this is a show run of our aircooled V12 engine.
This engine has got 87ccm./ 5,2 cubic inches. the fuel is Methanol with
15%Nitromethane and 12%lubrication Oil. For further Informationsplease go
to my websitte
Evinrude 300XP -91
After a few hours in the workshop..
The expansion chambers are "home made" by hydroforming. The original Exhaust is milled away and the engine
block is filled whit plastic.
This engine will get electronic fuel injection and will not be used in a
Note: This is a sponsored video for Forge Apollo
The Best Sounding F1 Engine: Ferrari 3.0L V12 - 1995 Ferrari 412 T2 Sound
Flickr Page: http://www.flickr.com/photos/19bozzy92/
Facebook page: https://www.facebook.com/19Bozzy92YT
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In the past 2 days I was at Monza circuit for a Ferrari Corse Clienti event
and among the various F1s there was this 1995 Ferrari 412 T2, which is
moved by a 3.0 liter V12 engine, screaming around the track. What to say...
Camcorder: Canon Legria HF G30 + Canon DM-100 Microphone
Event: Ferrari F1 Clienti 2014
Where: Autodromo di Monza, Italy
Link To My Channel: http://www.youtube.com/user/19Bozzy92?feature=mhee
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V 12 Modellmotor RC Engine the original Video !
-Testrun- this is the original Video from the owner;topspeed 6000RPM;6-8
HP--87 ccm -has got the whole Engine
for further Information please go to my websitte -
I do read all your coments - thank You