>> I'm looking for the standard weights of the major
>> components in a 13b engine to do a weight
analysis.
>>
>> My goal is to lighten the engine by at least 30%
and
>> at the same time strengthen the parts.
>>
>> AM-SC1 is a new magnesium alloy (mg matrix) with
a
>> 32%
>> weight reduction from aluminum. Temperatures can
run
>> higher as well so cooling may be adjusted.
>>
>> The rotor assembly cannot be lightened
significantly
>> just yet. Custom shop has taken only 0.2 pounds
off
>> the rotor.
>>
>> The casings are the prime target.
>>
>> Fuel injected or carburated, I'm looking at the
full
>> aircraft engine without the prop. So if you have
a
>> special exhaust manifold that is lightweight let
me
>> know.
>>
>> David Mathes
>>
>>  From Don Dunbar.
>>
>> Paul Lamar ...No rotor no motor.
>>
>
> Wow. Thanks!!!
>
> David Mathes

Hi David;

Have you looked at Al-SiC to replace the iron bits:
    http://www.mc21inc.com/
or foamed metals using ceramic microballoons?

Cheers
Cary

Yes...Al-SiC (Aluminum matrixed with Silicon Carbide)
allows for higher temperatures. Sleeves in a MG matrix
are a possibility for this material too.

The fun part is that magnesium is less expensive than
aluminum now, and that there are at least four
different metal matrices available that can be cast
instead of machined reducing the cost greatly.

Automakers are planning to move into magnesium matrix
quickly as partnerships grow with China one of two
major sources, the other being Russia.

The foamed metals with microballoons have some issues
and are more expensive. My company (Parsec
International) views this solution as a next
generation (2007-2009) development while the cast
magnesium matrix is moving from research into
development.

The heat issue can be addressed a number of ways with
specific oils, metallic coatings and microfiltering of
oil/gas/water to maintain high quality fluids.

No matter what metal or matrix technology (Al, Fe, Mg,
SiC) is used the chamber requires special work which
is essentially chemical honing removing microridges
and filling microvalleys.

For example, see www.taylor-race.com/isotropic.cfm

David Mathes




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