[BITList] Small Engines

Sun May 19 14:25:45 BST 2013

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 Small Engines

SMALLEST PETROL ENGINE 

SCIENTISTS have built the smallest petrol engine, tiny enough to power a
WATCH. The mini-motor, which runs for two years on a single squirt of
lighter fuel, is set to revolutionize world technology. It produces 700
times more energy than a conventional battery despite being less than a
centimeter long (Not even half an inch!) It could be used to operate laptops
and mobile phones for months doing away with the need for recharging.
Experts believe it could be phasing out batteries in such items within just
six years. The engine, minute enough to be balanced on a fingertip, has been
produced by engineers at the University of Birmingham . Dr Kyle Jiang, lead
investigator from the Department of Mechanical Engineering, said: "We are
looking at an industrial revolution happening in peoples' pockets. The
breakthrough is an enormous step forward. Devices which need re- charging or
new batteries are a problem but in six years will be a thing of the past.."
Other applications for the engine could include medical and military uses,
such as running heart pacemakers or mini reconnaissance robots. At present,
charging an ordinary battery to deliver one unit of energy involves putting
2,000 units into it. The little engine, because energy is produced locally,
is far more effective.. One of the main problems faced by engineers who have
tried to produce micro motors in the past has been the levels of heat
produced. The engines got so hot they burned themselves out and could not be
re-used. The Birmingham team overcame this by using heat-resistant materials
such as ceramic and silicon carbide. Professor Graham Davies, head of the
university's engineering school, said: "we've brought together all the
engineering disciplines, materials, chemical engineering, civil engineering,
and mechanical engineering. What better place to have the second industrial
revolution in nano-technology than where the first took place, in the heart
of the West Midlands. 

SOME PEOPLE THINK THEY ARE MACHINISTS ... AND SOME REALLY ARE! 

V-8 and V-12 Engines in Miniature! 

For all you out there who like big, honking V-8's and screaming' V-12
engines, check out these tiny versions that you could run on your workbench
or kitchen table. These models were built by craftsmen the same way the big
ones are made by machining billet stock and castings, but in miniature.
These are not just models that look like engines, they are real running
engines. Some of these photos were taken from the Joe Martin Foundation
Craftsmanship Museum but many more images can be found elsewhere on the web,
and engines like these can be seen in person at model engineering shows
around the country. (Underlined words in the text are links to related
sites.) Here are some really nice examples:

The late Lee Root built this ? scale Corvette engine. The major components
were machined entirely from solid billet aluminium that has been bead
blasted to look like castings, and it will turn 18,000 RPM! The coin you see
in some of the photos for size reference is a US Quarter. The valve covers
are just 4-1/2" long, and the miniature spark plugs are commercially
available.

This 1/3 scale billet machined, supercharged Chrysler 300 Hemi racing engine
from the 1960s was built by James Weber. It has a 1.0" bore and 0.90" stroke
displacing 5.65 cubic inches. The engine burns gasoline or methanol (methyl
alcohol) on dual electronic spark ignition and incorporates a two-stage
pressurized dry-sump lubrication system. It will turn around 12 grand and
uses a couple of computer cooling fans on the radiator to keep things cool.
Note the professional looking throttle and gauges on the stand.

Here's a V-8 and a half ; a ? scale Ferrari V-12 by Jeron Classic Motors. It
has double overhead camshafts, burns methanol on glow ignition and is
equipped with two oil pumps for dry sump lubrication. All six carburettors
function and are linked together for smooth operation. The heads and block
are about 7-1/4" long. Only a few of these were made before the company went
out of business, so it's pretty rare. Like many of the engines you see here,
it is on loan to the Craftsmanship Museum courtesy of Paul and Paula Knapp
and their Miniature Engineering Museum . 

Here's another twelve. The late Al Ingersol built this Curtiss D-12D 1/6
scale V-12 airplane engine completely from billet stock and also built a
model Curtiss Wright P 6E biplane to put it in. The engine is only 9" long
and weighs 6 pounds. It has a 0.80" bore and 1.062" stroke, displacing 6.46
cubic inches.

One of the more popular model V-8 engines over the years has been the
Challenger. This one was built by Ron Colonna. Casting kits are still
available for this 1/3 scale engine through Coles Power Models, although it
is definitely not a beginner project.

Several V-8 engines by Ken Hurst are displayed at a model engineering shows
like the recent Western Engine Model Exhibition (WEME) in Vallejo , CA . How
about that supercharger! Behind the first engine is his blue Challenger V-8.
The 103 cc engine sounds great running on a mixture of white gas and high
octane racing fuel.

Eugene Corl built this 1/3 scale Chevy V-8 using engine castings he produced
himself. The engine is seen here at the Gas Engine Antique Reproduction Show
(GEARS) in Portland , OR .

Seen above are some of the wooden patterns, moulds, cores and raw castings
that had to be made to build Gene's 1/3 scale Chevy V-8. Once cast, the
parts must be precisely machined just like real engine components. When you
look at one of these finished little engines, keep in mind all the planning,
preparation, fixturing and behind-the-scenes work that goes into making one.

The three photos above show the world's smallest known running Chevrolet
V-8. Jim Moyer built this 1/6 scale version of a 1964 365 HP Chevrolet
Corvette 327. Note the tiny firing order cast into the intake manifold just
like on the real thing. The heads and block are machined from billet
aluminium. Jim even made stamping dies to make the oil pan, rockers and
front cover. The valve covers are investment cast.

The finished 1/6 scale 5-bearing crankshaft fits in Jim's hand.. It utilizes
real Babbitt bearings.

Here you can see the cylinder heads of the Moyer 327 plus the stamped oil
pan and front cover. Some parts inside the engines are made to scale like
the 30-30 Duntov camshaft, but some things have to be modified to make a
small engine run. Electricity and fuel molecules don't scale, so some parts
have to be slightly heavier or larger than exact scale would dictate.
Getting a small engine to run requires skill and careful work; getting one
to run well is an art. 

Here's a shot of Jim's tiny Corvette V-8 being test run. He is now working
on a 1/6 scale Chevy 409.

Gary Conley came up with the ? scale Conley V-8 in the 1980's. This version
has twin carbs. You could buy it as a kit or as a completed engine. Gary is
now building what he calls the "Stinger 609" V-8 that will soon be available
as a complete running engine. A supercharged Stinger 609 running in a 1/4
scale dragster. Impressive!

Paul Knapp built this great looking version of the Conley V-8. It runs twin
carbs on a fully functional Roots style 671 blower and will turn 12,000 RPM
on methanol. Note the nicely painted and highly polished finishes on this
beautiful engine. (Did you notice that the ignition switch even has its own
set of keys like a real engine?)

A Cirrus V-8 by Profi M.E. of the Ukraine is based on the Merritt Zimmerman
design. The exposed rocker arms need to be manually lubricated before
running the engine. Again, note the really nice finishes on every part.

This is one of only six air-cooled Micro Cirrus 1/12 scale V-8s produced by
Profi M.E. using the components from a run of 4-cylinder Micro Cirrus
engines. Six water-cooled versions were also built. The cylinder heads on
this rare V-8 are only about 2" long. Note the size of the quarter at the
bottom of the photo. This thing is TINY!

This 87 cc V-12 by Martin Ohrendorf of Germany has a 21 mm bore and stroke,
24 exposed rocker arms and three carbs. It will spin a 24/10 propeller at
4500 RPM. One just like it can be seen running on YouTube.

This scale 426 Hemi V-8 by Roger Butzen was made by using parts of a plastic
model kit for reference. This one, however, is all metal and it RUNS! Only
the air cleaner decal from the plastic kit made it to the final running
version.

Here is another Challenger V-8 at the WEME show in Vallejo . This one was
built by Dick Pretel and sports triple carbs. Starter, batteries and other
peripherals are hidden in the wooden base. It even has carrying handles! Big
fins on the valve covers help with cooling. 

The Joe Martin Foundation for Exceptional Craftsmanship has a machine shop
in their museum in Vista , CA , where they are currently building a
miniature Howell V-4 engine. They have documented the build step-by-step so
you can see what it takes to put together a running miniature engine. Send
this on to every motor head you know. The craftsmen who build these little
beauties deserve plenty of recognition. 

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