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From: "George Lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3116562@logan.com>
Subject: Re: [FlyRotary] Re: New rotary engine-mazda points on design
Date: Sat, 6 Sep 2008 15:25:46 +1000
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Ed,
Of course I'm playing the devils advocate, when I mention these things as 
I'm as hopeful as anyone that it's exceptional, however I didn't know they 
were using ceramic coating on the aluminum -I would be concerned about 
ceramic coatings!
George ( down under)

>I understand your points and concern, George.  But, just think about what
> folks must have thought when the first rotary engine came out {:>).  I 
> agree
> with Ernest, the technology has come a long ways on ways to protect the
> aluminum housings.
>
> I think most of the HP increase is as Ernest points out from combustion
> volume increase (and a bit from less cooling of the combustion by the 
> walls)
> so more heat to push the rotor.  So I don't expect anything as exotic as 
> the
> current Renesis engine in the intake department - they simply don't need 
> it
> and the complexity and the cost it entails.  But, of course, this all
> remains to be seen.
>
> I'll take the chance on being one of the early ones to try the 16B - 
> getting
> a bit tired of the 13B and haven't done anything to the aircraft in over a
> year - its just starts up and takes me where I want to go.  I guess the
> honeymoon is over {:>)
>
> Still don't have any good feel on how soon we might see this engine - I
> doubt it will be in the 2009 model year (probably out now).  I hope to 
> heck
> that FORD doesn't try to kill it which is a constant concern.
>
> Ah, well - back to programming.
>
>
>
> Ed Anderson
>
> Rv-6A N494BW Rotary Powered
>
> Matthews, NC
>
> eanderson@carolina.rr.com
>
> http://www.andersonee.com
>
> http://members.cox.net/rogersda/rotary/configs.htm#N494BW
>
> http://www.dmack.net/mazda/index.html
>
> -----Original Message-----
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
> Behalf Of Ernest Christley
> Sent: Friday, September 05, 2008 6:51 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: New rotary engine-mazda points on design
>
> George Lendich wrote:
>> Ed,
>> I was wondering about all that and hope any gains aren't negated by
>> the removal of some highly tuned and complicated intake manifold, that
>> won't fit into a cowl- like the Renesis manifold.
>>
> The gains are coming from increased volume.  When it comes to power,
> there is NO substitute for volume.  We may not be able to get rated
> power with an unoptimized, NA intake, but we WILL get more power.
>> There is also the concern of how good the surface treatment of the
>> aluminium side housing are going to be. I guess only time will tell. I
>> hate the first release of anything like this, it invariably has problems.
>>
> That is a valid concern, but ceramic surface coatings have come a LONG
> way in the past 20 years and are well understood by the people that need
> to understand them.  There isn't anything really cutting edge about what
> they're doing.  I plan to treat the engine I'm almost ready to start as
> a 500hr engine.  I'd treat the 16B the same way, just because they're so
> cheap to replace.
>> Then there's the complexity of injection and the very high pressure of
>> direct injection, as well as the associated hardware and much needed
>> software to make it all work.
> From the animations, the injection timing will have the injectors
> blowing fuel into a chamber that is below atmospheric, unless there is a
> turbo pumping up the working chamber.  Remember, the rotor is pulling
> air into the chamber so you'll have less than 100% VE.  Neither the
> hardware nor the software are anything new.  The only thing different is
> when the software tells the hardware to blow fuel.  Just a little
> tweaking of some software parameters.  No new territory is being
> discovered.  Again, nothing cutting edge.
>
> -- 
>
> http://www.ernest.isa-geek.org
>
>
>
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