I'm no rocket scientist, but correcting the decalage on my
Gnome fixed it for me.
Dan
----- Original Message -----
From: "Dave Seay" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, February 16, 2001 11:39 AM
Subject: Re: [RCSE] porpoising solutions???
> I would like to hear the comments on this as well.
> I've got an Xterm parked on the runway waiting for the
wind to calm down but
> I noticed the same thing with my LB2.
>
> I initially had the LB2 balanced right dead on and it did
the roller coaster
> too. At first I added weight and it go it under control
but I did not like
> the increase in weight. I removed the weight and trimmed
in a little down
> and after doing this several times, I got a happy medium.
I have a little
> extra weight and a little down trim and I like the way it
handles.
>
> Dave
> ----- Original Message -----
> From: "Daniel Boyer" <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Friday, February 16, 2001 2:20 PM
> Subject: [RCSE] porpoising solutions???
>
>
> > I took my new Xterminator out for a test flight
yesterday evening (I found
> a
> > field with well packed snow that I could walk on)...
First off I have to
> > say that it floats like a dandelion (and this was in
VERY still air which
> > was giving me air times of ~12 seconds with my 11.5oz
Zagi THL)... The
> > first throw, it glided out nicely but started trying to
porpoise... I
> > brought it back to me and checked the CG... It was in
the dead center of
> the
> > recommended CG. I added pushed the battery pack to the
very front of the
> > nose (moving the CG forward about 1/8") and gave it
another toss... it
> still
> > porpoised so I brought it back and added a couple of
coins to the nose
> > (bringing the CG about 1/4" ahead of the recommended
CG)... gave it
> another
> > toss and it flew fine (although wasn't as responsive as
before.
> >
> > I added the weight to the front to correct the
porpoising, because in the
> > past when my planes have done this, everyone at the
field said to just add
> > nose weight. I always end up with my CG's in front of
the recommended
> CG's
> > because of the porpoising, but then I read about people
flying with cg's
> > behind the recommend placement. This has made me wonder
if moving the CG
> > forward is truly the correct correction for the
porpoising. Is there
> > another correction for this porpoising tendency other
than CG movement?
> >
> > Thanks, Daniel
> >
> > BTW: I only got to toss the Xterminator about 5 times
b/c on the 5th time
> I
> > decided to give the launch preset a try, so I switched
to the model memory
> > that I thought I had programmed with the latest launch
preset setup...
> Gave
> > it a toss, saw the plane starting to loop backwards so I
switch the preset
> > switch back in the opposite direction to which it
responded by doing a
> nose
> > dive (despite giving it full up elevator... I could see
that the elevator
> > was still showing down, so this was not a stall...) it
hit the ground and
> > cracked the fuse in numerous places (I have since fixed
it w/ about and
> hour
> > of work)... I assessed the damage and determined that it
wasn't anything
> > major, then I tried to figure out what happened... I
checked my mixing and
> > quickly realized that I had chosen the wrong model
memory and that the
> > switch had been having no effect, but instead my
throttle stick was in
> > control (I was apparently hitting the throttle stick in
my paniced state
> > causing the down elevator input). ie: ALWAYS DOUBLE
CHECK YOUR MODEL
> MEMORY
> > SELECTION!!! ;-) I'm going to try to give it another
try this weekend if
> > the snow holds off.
> >
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