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Mark,
We are singing from the same sheet of music. I
need the weight reduction more than you, or should I say no one needs it more
than me. I am working on a single 13B similar to Richard's 12A. Actually
Powersports light weight engine used components out of both the 12A and 13B,
the 12A e-shaft mostly, I'm using my own single crank, 13B rotor housing
Renesis rotor (their cheaper- half price in fact) and looking to Bill Jepson's
end housings. I told Bill I wanted a Titanium rotor and light weight water
pump but it will all take time to just get the basics like P-port inserts and
end housings manufacture up and running. It never happens soon enough does
it.
Bill did mention the cost of Det-gun application
it was very high, but can't remember. There is no something that's almost as
good. Mistral tried everything and they all failed. It doesn't matter how good
the surface or how hard the surface is, it's the substrate that fails, taking
the surface with it. Aluminium is a soft substrate. Det-gun application
pushes steel into the surface a good depth eliminating the substrate
failure.
I'm wondering how Mazda handles the wear issue
in the 16X, however there's so many 13B's out there will still be a strong
demand for parts for likes of Aviation and racing.
George ( down under)
George,
I can't help but wonder why the cost for detonation gun coatings hasn't
come down with time. How expensive is "expensive"? Maybe we could
settle for something almost as good but half the cost?
I wish Richard, Bill and all the others who are working on the problem
great success. Maybe Mazda will decide to move ahead with their aluminum
16X engine in the near future. That would pretty much solve the weight
problem for us.
Mark
On Thu, Jul 8, 2010 at 5:58 PM, George Lendich <lendich@aanet.com.au>
wrote:
Mark,
The secret to Richards design is an expensive
cast iron mould - so if anything does happen to him, that's the end of it
anyway.
Although , like Tracy, I admire his
efforts as not many people could
accomplish what he has done, I wish I had thought of the Powersport type
carbon steel, oven brazed housings, that Bill Jepson is redesigning for the
homebuilt use.
The problem with end housings is the need for
strong flat wear surfaces couple with light weight. Naturally aluminium
is light weight but the only reasonable wear surface to date has been
Det-gun application and that's expensive. Richard opted to go the cast iron
wear surface ( which is very good) and because it is a flat area it
has to be thick so as not to flex under load, this he coupled with a
aluminium half housing. The carbon steel housings that Powersport
developed is all steel, machined to exacting tolerances and brazed
together in an over while being clamped in a jig ( I
assume).
Although aluminium is lighter than steel, the
steel housings are only 1 lb heavier, I assume because the walls can be
thinner. This would still be lighter than Richards composite
housing.
There are other technologies coming to the fore
like sintered laser technology where powered metal is laid down in thin
layers at a time and then melted by the laser. This can be done to exacting
specification and comes out much like high quality casts - with high
density. Only the material needed is fused, the other falls from the item as
it's removed from it's container. The thing I like about this technology is
that's there very little machining ( which is expensive) and little waste.
Different materials can be used so as hard points can be built in
as the item is constructed. I would like to see a Titanium rotor built with
hard points ( built in steel strips) for seal areas. I think you will
see much more of this in the future, however I assume it is quite expense at
this stage. Commercial reality drives these technologies, so we might
see these things sooner rather than later - I hope.
George ( down under)
Step
1 should read, "Machine the aluminum side housings from billet aluminum
per attached drawings."
The real issue is that I would hate to see all of Richard's excellent
work lost if anything were to happen to him. It would turn into
another story of some mystical rotary engine stored away in a garage
somewhere for decades, never to run again. The "hairy-chested hero"
group needs to do more to further the rotary movement for those that will
follow. Otherwise, we will keep reinventing the same old wheel over
and over again.
Mark
On Thu, Jul 8, 2010 at 9:18 AM, Tracy Crook <tracy@rotaryaviation.com> wrote:
how
about a "how to" manual?
After following Richard's
impressive effort over the years, I can just imagine that
manual.
Step 1. Machine the aluminum side
housings from billet aluminum.
Step 2 Cast the
iron wear surfaces and machine the o-ring grooves to seal the water
jacket area.
.
.
.
Step 302
...........
Some projects aren't suited to DIY manuals. If
you had the talent & ability to follow the instructions, you
probably wouldn't need the manual at all. It sure is way beyond
what I could tackle.
Tracy
On Thu, Jul 8, 2010 at 9:52 AM, Mark Steitle
<msteitle@gmail.com> wrote:
Well
then, how about a "how to" manual?
Mark
On Wed, Jul 7, 2010 at 12:04 PM, Richard Sohn
<res12@fairpoint.net> wrote:
As soon as someone shows up with a
couple million bucks.
Richard Sohn
N2071U
----- Original Message -----
Sent: Wednesday, July 07,
2010 9:22 AM
Subject: [FlyRotary] Re:
Flight Report
Richard,
That works for me, RES12 it is. So, when do you start
selling these little jewels?
Mark
On Wed, Jul 7, 2010 at 9:09 AM, Richard
Sohn <res12@fairpoint.net> wrote:
Whatever, I call it the RES12. If
there is a 13B based version in the future it will be a
RES13.
Richard Sohn
N2071U
----- Original Message -----
Sent: Tuesday, July 06,
2010 1:19 PM
Subject: [FlyRotary] Re:
Flight Report
Richard,
Then, wouldn't you refer to half a 12A as a 6A?
Mark
On Tue, Jul 6, 2010 at 12:27 PM,
Richard Sohn <res12@fairpoint.net> wrote:
Yes Mark,
the airframe is my AVID Heavy
Hauler, which I flew for 10 years with a SOOB. Airframe mods
are done, and the engine is on the test stand for shake down
runs.
I would call that engine a 12B
because it uses a 12A rotor and rotor housing.
Richard Sohn
N2071U
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