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Subject: Re: [FlyRotary] Re: MAP line suggestions
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From: Tracy <rwstracy@gmail.com>
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Date: Tue, 11 Sep 2012 18:00:04 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I use 1/8" ID silicone tubing for MAP lines.  Truly high temp capable.

Tracy

Sent from my iPad

On Sep 11, 2012, at 12:02 PM, Ernest Chrisltey <echristley@att.net> wrote:

> On 09/11/2012 10:24 AM, Bill Bradburry wrote:
>> That doesn't look like the rubber vacuum line sold in auto parts stores. =
 It
>> looks shiny and like plastic.  I would switch to the auto parts type.
>> I can see probably the two primary injectors right by where the line melt=
ed.
>> That area should not be too hot since fuel is right there.  However I do s=
ee
>> the EGT thermocouple line going by the area as well.  That may be
>> transferring heat to the plastic line.
>> Do you have a picture a little farther back to help orientation as to whe=
re
>> we are looking on the engine?
>>=20
>=20
> I got the line from Advance Auto, and it was labelled as high-temp MAP lin=
e.  I will look to see if I can find something different.
>=20
> I've attached the best pic I could find to show where I'm pulling the MAP f=
rom.  There really doesn't seem to be many options to relocate the pickup as=
 Dave suggests, because the line will still need to loop around to the "bath=
room handle" firewall penetration.
>=20
> Mark, I don't think I have the option to pick up MAP without being near th=
e exhaust unless I completely redesign my intake.  I do have the exhaust com=
pletely encased in a .020 stainless box, but I think the issue is that witho=
ut a blast tube into the encasement, the heat has no where to go.  I also th=
ink that air comes off the prop, through the front mounted radiator, and swi=
rls around the engine inside the cowl.  That would blow air past the exhaust=
 and right across the MAP and electrical lines.  But I've not thought of a w=
ay to verify this theory.
>=20
>=20
> <MAP_Pickup.jpg>
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