flyrotary@lancaironline.net Mailing List Archive

Mark,

That is what I get For "Assuming"................The best I could recall (from a photo you posted) it looked

like your bypass "T" was under the cowl close to the engine...........0.020 sounds about right as that

is what I used on my RX7................

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Monday, July 4, 2011 1:28 PM
Subject: [FlyRotary] Re: Crossover idea

Kelly,

I don't think it really matters as long as it is on the high pressure side of the pumps. Assuming you have a return system, any air in the system will quickly be purged. I have dual pumps and dual filters, all connected in parallel. I put my "T" at the point where the two lines go back to one line. The other end is tied back into the return line.

Best I recall, the orifice is about .020". I used a motorcycle carb jet. It was just the right size for me to tap threads into the "T" fitting and then screw the jet directly into the fitting.

Mark

On Mon, Jul 4, 2011 at 10:00 AM, Kelly Troyer <keltro@att.net> wrote:

Doug,

Bypass can be installed anywhere between the pressure and return lines but I (and I believe

Mark did) would place the bypass close to the fuel rails and injectors in order to purge air from

as much of the pressure line as possible in the event of a tank run dry and a air lock preventing

the pump (s) from priming...........IMHO

Kelly Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil Manifold

"TURBONETICS"_TO4E50 Turbo

From: "dlomheim@aol.com" <dlomheim@aol.com>
To: keltro@att.net
Sent: Monday, July 4, 2011 9:32 AM
Subject: Crossover idea

Kelly; I remember reading about this before a few yrs ago but haven't considered it since. Practicly speaking how are the fellas laying this out and what size fuel line and fittings are they using? -4 if I remember right from a few yrs ago...but here do they TEE it? Right after the pumps to ensure fuel fills the pumps again if run dry I'd suppose. We just got a new roof on our house and I've about finished a bathroom remodel so now will begin backyard landscaping and pool replastering...still hope to work on a/c again in Sept - Dec when hanger cools off!
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