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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-723947@logan.com>
Subject: Re: [FlyRotary] Primary Injectors installation
Date: Fri, 16 Sep 2005 10:37:47 -0400
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Hi Bill,

The plastic thing with holes is the injector "diffuser" designed to break up 
and better atomize the fuel from the injector.  There should be a slight 
indentation near the top (end with the big hole where the injectors sits) on 
one side.  This indentation should match a similar key in the injector hole 
in the block. Take a flash light and peek inside the injector hole in the 
block.    Insert the plastic injector diffuser such that the two keys line 
up - can be a bit tricky to get it to seat properly. I find sticking my 
finger down into the end of the diffuser while it is in the block and 
twisting it a bit helps.  It may look like its seated, but when its really 
seated its a ways down into the block.

The end with hole stays out - so the injector nose can be inserted.  Made 
certain you seat this diffuser (if you are going to use it - not essential 
but recommended) properly or else when you try to tighten the bolts which 
hold the fuel rail onto the injectors you could break the diffuser or 
damaged the plastic cover (over the injector pintel) on the bottom of the 
injector.

As best I recall the angled plate of the diffuser should deflect the stream 
of fuel toward the intake port (into the combustion chamber), provided you 
have the keys lined up.   Then the injector with its "O" ring is inserted. 
The nose of the injector should go into the injector diffuser but the "O" 
ring should rest on its top.

Hope this helps.

Ed A

----- Original Message ----- 
From: "William" <wschertz@ispwest.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Friday, September 16, 2005 9:53 AM
Subject: [FlyRotary] Primary Injectors installation


> Need some guidance/help on what goes on with the primary injectors.
>
> They are installed in the cast iron center housing, and in the parts I
> received from Bruce T. there is a plastic device that looks like a small
> plug with many small holes in two plates, one at an angle and the other
> normal to the flow.
>
> Does this plastic part go into the injector recess, how about the rubber
> 'donut' that came on the injectors, seems a loose fit inthe holes.
>
> I haven't seen any information on how these install in the primary 
> injector
> holes.
>
> Thanks
> Bill Schertz
> KIS Cruiser
>


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