The manual for the 912s calls up an orifice of 0.35mm (0.014"), which looks
to be about the size of Europa's restrictor, FS02.
Duncan McFadyean
-----Original Message-----
From: Fred Fillinger <fillinger@ameritech.net>
Date: Saturday, November 03, 2001 12:15 AM
Subject: Re: Fuel Pressure
>> One method of attacking pressure side vapor lock is a
>> >restricting orifice and check valve in a return line to the tank.
>> >This allows a small am't of cooling fuel to flow whether the engine
>> >needs it or not. Problem is engineering the orifice
>> >
>> >Regards,
>> >Fred F., A063
>>
>> What's wrong with the orifice size recommended by Rotax (in their
>> installation manual)?
>> Would an AN flap valve be over-restrictive in the return line?
>>
>> Duncan McFadyean
>
>I'm sure nothing wrong; "thousand pardons." I know of only the 914,
>where the return flow is metered by a regulator thingy bolted to the
>airbox. No orifice in the line mentioned in my manual, and they even
>specify low resistance in the return line. Does the 912 flow some
>(orificed) fuel back from the pressure line?
>
>In discussing all this stuff, I see it best to state which Rotax. On
>the 914 vs. vapor lock, the fuel line run to the air box is a short
>one, so maybe much less an issue.
>
>Regards,
>Fred F.
>
|