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Message-ID: <002901c6ad32$bcfac940$df4b693a@george>
From: "george lendich" <lendich@optusnet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1311173@logan.com>
Subject: Re: [FlyRotary] Re: PPort, Telescopic intake slide throttle combo
Date: Sat, 22 Jul 2006 12:01:24 +1000
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Thanks Cary,
Looking forward to any results/suggestions!
George (down under)

> Hi George/Buly;
>
> I did the slide throttle myself the old fashioned way with a basic
> milling machine.
> It differs quite a bit from Paul Lamar's designs.  I don't recommend the
> notch ;)
> Works well, although I would do everything different if I did it again.
>
> Copy away!  Let us know how it turns out.
>
> The trombones slide easily enough, requires a few ounces of pressure
> going down,
> a bit more (bad guess 16oz?) sliding up.
> A lot of head scratching and tricks to get everything to line up well
> enough.
> I wasn't sure if it could be realistically done - the next test is at
> temp with airflow.
> The Pport (2") and port timing are very similar to the Mazda Lemans
> (slightly later open/close)-
> so I have a pretty good map to follow.
> Yep, slides well despite the threaded rod.  The rod helped lining things
up.
> I'm not sure if using linear bearings or teflon bushings along the Mazda
> Lemans design
> would be better.
>
> The current setup is ground adjustable - a throttle cable could be
> adapted easily enough.
> I am not sure if I will use a wideband Oxygen sensor to get the rough
> tuning or not.
> I would certainly be able to tune using standard Oxygen sensors during
> flight.
> If nothing else, I can find the tuned lengths and build another lighter
> intake.
> I have not built the plane yet, so don't wait for me!
> this engine may get car testing time first...
>
> I'll try to throw some material sources, pictures, instructions and
> hints together sometime
> after Oshkosh.
>
> Cheers
> Cary
>
>
>
>
>
> Cary,
> Love the 'trombone like' intake ( simple and effective) and was wondering
if
> that was one of PL's slide throttle or something you did yourself.
> I would like to copy that if I may, to identify the tuned length of my
1.75"
> P-port. Is that threaded rod that you have used on the slide guide?
> It would be very interesting indeed if you managed to get an in-flight
> adjustable tuned intake and measure it's effectiveness.
> Personally I would be happy to just test for the best length at cruise.
> Keep up the good work!
> George (down under)
>
>
>  > Hi All;
>  > Posted this on the other list - some of you may be interested in this
>  > teststand setup as well...
>  >
>  > I was hoping to have this setup running months ago on the test stand
>  > with the Megasquirt - damn work is interfering with more interesting
>  > activities...
>  > The slide throttle is flush with keg. The notch was to avoid the stock
>  > water pump, I wish I had been annoyed enough to chop it up earlier...
>  > Same for the adjustable, telescopic intake. I will rebuild almost flush
>  > with the engine and at a different angle flush with the bottom of the
>  > oil pan after testing.
>  > Usable range (from rotor housing face) is 19-27". Could be modified for
>  > inflight adjustment.
>  > Injector location will probably make it difficult to pull fuel uphill
>  > for start - we will see.
>  > Based on Francois' (Mistral) comments I will probably move the
injectors
>  > closer to the keg.
>  > Besides, they are mucking up the airflow.
>  > One of the objectives was to take advantage of the smaller rotary
>  > profile - the height/width could be shrunk further...
>  >
>  > Cheers
>  > Cary
>
>
> --
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