[NSRCA-discussion] Focus 1.5

Mon Mar 5 18:33:20 AKST 2007

Here are some measurements- another data point for you. Focus II plane made as nose heavy as possible.

Ailerons low rate 9 degrees up and down. Expo 19 percent. High rate ailerons 11 degrees up and down, expo 26 percent 

Elevator low rate 8 degrees up and down, expo 25 percent. Elevator high rate 14 up and 13 down, expo 50 percent. 

Rudder low rate 1 inch (measured from the top of the rudder) with 44 percent expo. Rudder high rate 1 3/8 inch, 70 percent expo. 
 http://www.rcuniverse.com/forum/m_1431697/mpage_8/key_/tm.htm  page 8

Don

-----Original Message-----
From: rdose at wi.rr.com
To: nsrca-discussion at lists.nsrca.org
Sent: Mon, 5 Mar 2007 10:17 PM
Subject: Re: [NSRCA-discussion] Focus 1.5

Pete and other Focus owners,

I have had the unique opportunity to have Dave Guerin personally assist 
withe trimming of (3) of my Focus models including (2) Focus I's and my most 
recent Focus II Arch and I flew in Phoenix.  Dave's process begins with 
measuring the CG, ensuring that at a minimum, it is at least just in front 
of the wing tube.  Then we fly it and confirm.

In Phoenix, Dave was present for the initial 9 flights.  He with uncanny 
accuracy, based on the small amount of elevator mix it seemed we needed 
(about 4%/2% with 13 degrees of elevator travel) Dave said it needed 1 and 
1/4 ounces MORE nose weight...I added and it helped complete the grooviness 
and tracking.  Remember there are hundreds and hundreds of these models and 
pilots who have won every class at every level in the US.

Based on the 1/4 in front of the wing tube CG, you should have less about 
0 - 4% pitch based on 12-13 degrees of elevator travel.  If you have more, 
it is TAIL HEAVY!!!  Additionally, my model ended up with 3%/4% rudder 
aileron mix.  With YS DZ 160 and APC 18.1 x 10 prop we used 1.5% of down 
elevator mix beginning offset @ 50% throttle and 3.5% of right rudder mix 
offset @ 50% throttle to fine tune the up and down lines.

This process took about 4 flights after I set the up EXACTLY as Dave details 
in the instruction manual.  I set the bench incidence @ + .30 degrees for 
wings and a 0 degree stab with the tail post 1" off the work bench.

The model (piloted by Arch Stafford) won Masters in Phoenix with a total of 
10 flights, 4 of those flights contest flights.  An excellent example of 
following the set-up directions beginning with a proper CG with a capable 
model and skilled pilot.

Rusty Dose
Team Futaba
Team YS Performance
----- Original Message ----- 
From: "Pete Cosky" <pcosky at comcast.net>
To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
Sent: Monday, March 05, 2007 8:32 PM
Subject: Re: [NSRCA-discussion] Focus 1.5

> My battery and all servos were as far back as possible to preclude tail
> weight.
>
> ----- Original Message ----- 
> From: "Randy Forbus" <rforbus at hotmail.com>
> To: <nsrca-discussion at lists.nsrca.org>
> Sent: Monday, March 05, 2007 9:25
> Subject: Re: [NSRCA-discussion] Focus 1.5
>
>
>> Ok thanks I checked mine at 1/4 in front of the wing tube seems on the
>> nose
>> heavy side
>>
>>
>>>From: "Pete Cosky" <pcosky at comcast.net>
>>>Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>>>To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>>>Subject: Re: [NSRCA-discussion] Focus 1.5
>>>Date: Mon, 5 Mar 2007 21:22:41 -0500
>>>
>>>Randy,
>>>
>>> >From the FWIW file, I set the CG on mine at the wing tube and ran
>>> >through
>>>the trimming chart to get it dialed in. Arch can attest to how it flew. I
>>>want to say the CG wound up at the leading edge of the wing tube.
>>>
>>>Pete
>>>
>>>----- Original Message -----
>>>From: "Randy Forbus" <rforbus at hotmail.com>
>>>To: <nsrca-discussion at lists.nsrca.org>
>>>Sent: Monday, March 05, 2007 9:09
>>>Subject: Re: [NSRCA-discussion] Focus 1.5
>>>
>>>
>>> > Well I think it does the advanced sequence just fine to till I get to
>>>the
>>> > snap parts, it will come im sure, thats whats great about all of this
>>>get
>>> > it
>>> > dialed in just like a race car
>>> >
>>> >
>>> >>From: "Pete Cosky" <pcosky at comcast.net>
>>> >>Reply-To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
>>> >>To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>>> >>Subject: Re: [NSRCA-discussion] Focus 1.5
>>> >>Date: Mon, 5 Mar 2007 21:00:42 -0500
>>> >>
>>> >>Arch,
>>> >>
>>> >>I had a 9151 on the rudder in my Focus 1.5 and you had no issues with
>>> >>it
>>> >>doing the entire Masters sequence. If he isn't getting a clean snap I
>>> >>would
>>> >>have to agree with the CG theory.
>>> >>
>>> >>Didn't you sell your Focus II a couple years ago?
>>> >>
>>> >>Pete
>>>
>>>
>>>_______________________________________________
>>>NSRCA-discussion mailing list
>>>NSRCA-discussion at lists.nsrca.org
>>>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
>>
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>
>
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