Renesis fuel burn
No closely calibrated fuel burn numbers yet because I'm starting over on
calibrating after the injector snubber change which changed
everything. The maximum fuel burn will probably not change
much although that is not a useful number anyway IMO. The only time
the engine is run at those conditions is when racing at or near sea level.
EC2 injector drive snubber update.
On the subject of the injector driver snubber change, I had hoped to
make it an easy to do in the field thing but it did not turn out that way.
The physical change is fairly simple (adds a single part to the board) but the
change in injector drive pulse width requirement was so radical that it is
beyond the current range of the injector flow rate adjustment (Mode
3). This requires an update to the EC2 software so it has to be done
here : (
The same thing applies to the EM2 since it determines the fuel flow by
looking at the injector pulse on time. It could not be
recalibrated to compensate for the change so it's software had to be updated as
well.
OTOH, if you are currently flying the EC2 and/or EM2 and you are happy with
the way it is running, there is no pressing need to change anything. This
is not a safety of flight issue.
This change is only necessary if you are finding it impossible to get
the engine to run smoothly at idle. Note that this is not the only thing
that can cause rough idle so only do this as a last resort to fix idle
problems.
Since I only today got the EM2 software changes installed, I still do not
know if there is any fuel burn improvements as a result of the snubber
change. All EC2s shipped since March 20 have this change
incorporated.
Tracy
----- Original Message -----
Sent: Wednesday, April 04, 2007 11:37
AM
Subject: [FlyRotary] Renesis fuel power
fuel burn.. Question for Tracy
Tracy,
Do you have any
revised data on your Renesis max fuel burn after fine tuning? You web site
shows 20.8g per hour. If I remember correctly this was one of your early test
flights.
Thanks,
Bobby J
Hughes
(new
engine mount, new intake, more fiberglass,err)