[NSRCA-discussion] C'ARF Integral - Mixing secret?

[Atwood, Mark]

Never had an integral, but there are a lot of them in the area and none have that issue that I'm aware of.  Sounds like a thrust configuration issue...as though you had left thrust in the motor or simply not enough right thrust, which would cause you to have too much right rudder trim at full throttle.

Mark Atwood
Paragon Consulting, Inc.  |  President
5885 Landerbrook Drive Suite 130, Cleveland Ohio, 44124
Phone: 440.684.3101 x102  |  Fax: 440.684.3102
mark.atwood at paragon-inc.com<mailto:mark.atwood at paragon-inc.com>  |  www.paragon-inc.com<http://www.paragon-inc.com/>

From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Woodward, Jim R (US SSA)
Sent: Tuesday, July 06, 2010 2:42 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] C'ARF Integral - Mixing secret?

Rudder is moving approximately ¼" at the 12% setting.  Actually could use a bit more but the rudder would then induce more "roll" and "pitch" so the plane would have to cross-mix-itself out to get it really correct.  Very perplexing to help a new person with and to end up in an advanced mixning situation to say the least.  Also - does not have a heavy wing as I tested that too.
Jim


From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of J Shu
Sent: Tuesday, July 06, 2010 1:36 PM
To: General pattern discussion
Subject: Re: [NSRCA-discussion] C'ARF Integral - Mixing secret?

Not sure what the JR mix is like, but I've never used more than 2% on any of the Integrals.

Regards,
Jason
www.jshulman.weebly.com/<http://www.jshulman.weebly.com/>
----- Original Message -----
From: Woodward, Jim R (US SSA)<mailto:jim.woodward at baesystems.com>
To: General pattern discussion<mailto:nsrca-discussion at lists.nsrca.org>
Sent: Tuesday, July 06, 2010 2:31 PM
Subject: Re: [NSRCA-discussion] C'ARF Integral - Mixing secret?

Hi Guys, - Integral owners,

This weekend I helped out a friend fly his newly acquired Integral and the plane has some surprising tendencies.  I have never flown a plane that had such severe throttle to rudder mixing needed.  When throttle is reduced there is a dramatic yaw to the right.  This symptom starts taking place from 1/3 throttle to idle.  Above ½ the plane starts to fly normal.  On a vertical downline (idle, no throttle to rudder mix), the plane will actually attempt to yaw out of the downline.  Other noted times - when performing a simple ½ reverse Cuban and coming around the back with just a little bit of power, the plane dramatically yaws to the right.

For my 4 flights on the plane over two days (plus watching him fly) and recognizing this bizarre tendency was occurring relatively high on the throttle stick, I input a Throttle to Left Rudder mix.  This mix is at 12% Linear (using JR 12X).  12% takes 90% of the bad problem away.  Throttle curve is nice.  .

>From ½ throttle up the plane flies pretty nice and has very little pitch or roll coupling for knife edge.  CG seems very good.  The motor mount and nose-ring are tight.  The YS and 19x11 combo work great. Rudder trim appears to be normal.  There is no obvious sign or reason for this weird trait

Have any other Integral owners seen this severe yaw when power is reduced?  In all my other planes if I had EVER considered a throttle to rudder mix is was on the order of 2% - certainly not +10% mix.

Thanks,
Jim W.

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