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Date: Tue, 07 Aug 2012 15:32:36 -0400
From: Ernest Christley <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Fuel Filters. Was: Rotary Forced Landing
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Saro Marcarian wrote:

> Tank -> Pump (in tank) -> High Pressure Filter -> High Pressure Fuel
> Rail / injectors -> pressure regulator (referenced to intake manifold)
> -> low pressure return to tank
> 

Slight correction (because it is what I'm doing 8*)

Several of the newer systems have:

Tank -> Pump (in tank) -> regulator -> High Pressure Filter -> High Pressure Fuel Rail / injectors

The idea is that you don't send unneeded fuel into the engine compartment to get heated, only to send it back to
cool/evaporate off in the tank.

I've been using this without a problem on the ground, and it has worked just fine with temperatures hitting up to 220
(oops!).  I've been running the engine till it is uncomfortably hot, letting it cool down to at least below 200, and
then firing it right back up.  Cold starts are still my problem, taking up to 10 seconds to fire off the first time (and
I now think I know the problem with that one), but I've not had a single issue with hot starts, even after heat soaking
it through multiple run cycles.  My fuel line runs across the top of the engine in the hottest part of the engine
compartment, and I don't yet have any fire-sleeve on it.  If I haven't drained the battery, it kicks right off every time.