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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-910786@logan.com>
Subject: Re: [FlyRotary] Bernie building time 1.8 hours today
Date: Thu, 21 Apr 2005 21:18:25 -0400
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Sounds like you are having fun, Bernie.

Take care of that prop its my first one {:>).  Its already been through rain
with me.

There only two times I've encounter the up and down hunt mode.  One was when
I was too lean on the mixture.  It would run up in rpm until it encountered
the lean region then the engine would lose power and rpm fall off until it
was down in the richer rpm region. Whereupon it would again increase in rpm
until it hit the lean region and......, repeat , repeat.

  The second time it happened to me was when I was trying to stay up with
Tracy in a descent   at 2000+ fpm. The engine started stumbling and running
rough to the point I though my engine was having problems until Tracy told
me - no problem, just does that.  Check with Tracy for details.  So if you
were throttling back on your descent to stay out of the red arc, be advised
that the EC2 (at least my model) does not like that region of operation -
Higher rpm and low manifold pressure.

Ed A

----- Original Message -----
From: <jbker@juno.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Thursday, April 21, 2005 8:19 PM
Subject: [FlyRotary] Bernie building time 1.8 hours today


>
> Tried to complete Van's AD for tipup 7's and 9's this AM, got frustrated
and went to fly after lunch. South Westbound holding my 50 mile radius for
River Ranch( my home field per the limitation) and 10.5k. Followed the
circle on around to Lakeland, then climbed to 11.5 eastbound just north of
R2901 then south between the build up that looked like they went above 15k.
When I ducked down between the clouds to get under, actually got into a
light shower (no harm to Ed's prop :>)). Seems like the combination 9 and
rotary just like it better the higher I go. Will have to borrow and O2
bottle one of these days.
>
> The only thing that made me uncomfortable today was that when I throttle
back to stay out of the red arc on the A/S to about 15 manifold pressue, the
engine goes into the unstable up and down hunting that no mixture ratio
seems to fix. Any ideas??
>
> Bernie, 13+ hours now.
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>