Good point, Al.
Since I fly with same size injectors in
primary and secondary, I’ve never had the need to use mode 6 and it doesn’t
come to mind when discussing different size injectors. Thanks, I’m
going to have to embed that a bit more firmly in the brain.
Ed
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net] On
Behalf Of Al Gietzen
Sent: Friday, June 19, 2009 10:17
AM
To: Rotary
motors in aircraft
Subject: [FlyRotary] Re: 295cc vs
495 cc was [FlyRotary] responses to responses, not developing full power
When
you switch the primary injectors off and secondary
injectors
on - the EC2 is still providing the same pulse duration (assuming
engine
manifold pressure, etc are the same) for the almost twice as large
secondary
injectors as it did for the smaller primary injectors. Ergo, you
are
feeding the engine almost twice the fuel (for the same engine
conditions)
as you did when on the primary injectors. The engine is choking
on
too much fuel.
Unless, of course, you
have made the mode 6 adjustment to compensate for the difference in the flow
rates – or will mode 6 not handle such a big differential.
Al G
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