Abbra first fly report
George Kennie
geobet at gis.net
Tue Jun 7 09:57:51 AKDT 2005
Me too.
G.
Lance Van Nostrand wrote:
> Nat,Please explain why this would be so. I am very curious of
> this.--Lance
>
> ----- Original Message -----
> From: Nat Penton
> To: discussion at nsrca.org
> Sent: Monday, June 06, 2005 1:35 PM
> Subject: Re: Abbra first fly report
> Vince, if you decrease the wing incidence you will need
> more up elevater mix for the knife edges, not less. Let
> us all know how it turns out. Nat
>
> ----- Original Message -----
> From: vicenterc at comcast.net
> To: NSRCA
> Sent: Friday, June 03, 2005 9:52 AM
> Subject: Abbra first fly report
>
> Abbra glow version 1st. Fly report
>
> Yesterday, June 3, 2005 I flew my Abbra the
> first time. For those interested in the
> equipment please see Bob Pastorello web
> page. The version that I flew is the glow
> version using OS160 engine. Final weight is 9
> lb 14 oz. I know that I could reduce the
> weight a little more by using lighter wheels
> and smaller receiver. It is OK for me since
> this plane is my first 2 m class plane less
> than 10 pounds.
>
>
>
> First Fly impressions: Clearly the most
> constant speed plane that I ever flown. I can
> fly closer to show a better presentation. It
> is going to take some time for me to get along
> but definitively I like the change. Please
> understand that this is my first wide body
> plane. For those flying already wide body
> planes probably won’t be a big change. The
> down lines are a pleasure to watch. I felt as
> a pilot that I have more time to make
> corrections. Slow and snaps rolls are
> fantastic. Landing is a pleasure.&n! bsp; Not
> sure yet about spins since I did it once
> only. I really didn’t like the break. I think
> I need a little more up elevator since I lost
> some travel amount after the elevator
> trimming.
>
>
>
> First Trimming Impressions: As soon I took off
> I knew that I need down trim. I got fixed and
> finish with 28 bits of down trim in my JR 10 X
> radio. Also I finished with 4 bits of left
> trim. Ailerons and elevators were set up for
> 10 degrees travel. After the first landing,
> what a landing it was a 10 using the old
> rules, I checked the elevators and found that
> one half was a little more up than the other
> half. Also, I found the same problem in the
> right aileron that was a little more up. When
> I say a little is almost difficult to see at
> naked eye. Definitively the plane was tellin!
> g me that I need a better mechanic. This was
> clearly mechanic error (me!!). I checked the
> CG and the plane looks fine now. If you ask me
> where it is the CG now “I will say I don’t
> know”. I am one of those guys that check the
> CG in the air. I put the battery behind the
> firewall so I knew that I was a little nose
> heavy. The plane requires a little pressure
> when flying inverted. Right now I need more
> time to finish CG adjustments. My taste is a
> little tail heavy so I will start to move the
> battery but I want to correct the positive
> incidence first. I will check the actual
> locatio! n for those that want to have the
> information. The rudder was set to about 30
> degrees. I think is OK. I did the master
> schedule one time. I feel now that I am OK for
> travel. Probably, I will need to get a little
> more up for the spin but I did it only once
> yesterday. In the second fly, I did finish
> with 8 bits of down elevator. I know that my
> plane was set up for 0.75 degrees positive
> incidence. I also know that you can order the
> plane now using 0, 0.25, 0.50 and adjustable
> that you will need to install. It is clear to
> me that 0.75 is too high and probably I will
> go 0.25 in my next Abbra to reduce the down
> elevator trim. The positive incidence and the
> elevator trim causes that the plane requires
> rudder with up elevator mix to hold knife edge
> in both sides. In this regard, it is clear the
> plane requires opposite aileron also. This is
> not a surprise to me since I never had a
> pattern plane that didn’t require any mixing
> during knife edge. I still tweaking with
> rudder mixing with elevator and rudder. The
> final information will come in the future. My
> next step in trimming the plane is to try to
> reduce the positive incidence to 0.25 degrees
> to minimize the mixing and the down elevator
> amounts. Also, I will increase to 12 degrees
> the up elevator to improve the break on
> spins. ! On lateral balance I don’t think
> that I have to adjust. The plane tracks very
> well in loops but I need to check a little
> more.
>
>
>
> Tomorrow, I will have a judge calibration
> section. The judges will tell me if my
> impression of fantastic landings, snaps and
> slow rolls are realistic.
>
>
>
> Vicente Bortone
> -----------------------------------------------
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