Bud
Many thinks for this. We have forgotten how long since we put the torque
tube in. Lubricating etc appears to have made a big difference. Need to see
on next test flight.
Paul
On 9/10/10 21:01, "Bud Yerly" <budyerly@msn.com> wrote:
> Paul,
> Neutral means many things. The Europa aircraft should indicate nearly dead
> beat return to trimmed speed when the stick is pulsed upward sharply and
> released. Quickly pull the stick back about one inch at about 90 Kts. (I hold
> my forearm against my knee and pulse the stick with my fingers) and release.)
> If the plane corrects back in less than one oscillation cycle that is what is
> meant by dead beat over here.
>
> If the nose basically stops in a climb or very slowly continues up, and the
> stick does not return exactly where you had it and it does not return to the
> trimmed speed, you have friction in your pitch system and it must be worked
> out with lube, or whatever is necessary.
>
> If you pulse the stick up and the nose continues up but does come back to
> trimmed flight after a bit, your stabilator counter weight is a little too
> heavy (acceleration forces pull the leading edge down). If you pulse the
> stick back and the correction is quite quick back to trimmed level, your
> counterweight is too light and the acceleration has pulled the stab trailing
> edge down causing a nose down pitch. This makes flying in turbulence
> fatiguing.
>
> I suspect you have friction in your system. Please try the following. In the
> hangar and no wind, push down on the dorsal fin area just forward of the
> stabs, bouncing the aircraft briskly, and watch your stabilators. Normally
> they will move a bit as you bounce the aircraft but essentially stay where
> balanced. If the TE of the stab goes down, the counterweight is too light and
> vice versa. If the stab doesn't move at all, too much friction. If you move
> the stick or the trailing edge of the stab, the tail plane should move easily
> with little or no friction or stickiness. The bearings may still have dirt
> from finishing in them, or your trim tube could be dragging a bit, and must be
> clearanced.
>
> Vague trim is an indication your Flettner strips are too small and the trim
> tab can't feel the change in air pressure and transmit that to the stab.
>
> It's a start. Hope it is something simple.
>
> As for checklists, I was a standardization pilot for years in the military and
> used to build/update operations manuals, checklists and local procedures
> manuals for quick reference.. I made a personal checklist for my Europa
> trigear or mono or glider, equipped with an old 914 or 912 series engine. I
> plastic coated it for durability and have it as a ringed flip checklist.
> There have been changes over the years but basically it works OK. Take a
> look. In my feeble brain, it works to my logic.
> This is a personal checklist, it is for my use only, I still carry the engine
> manufacturers operational checklist and the Europa checklist in the aircraft.
> I do not intentionally deviate from anything in the operators handbooks. Many
> items are excessively abbreviated and may not suit other pilots. It is my
> belief that we all should have a personal operators quick reference card that
> can be accessed quickly, similar to the one produced by Europa, and refer to
> it often. I fly with this one next to me at all times. An excel spreadsheet
> is attached. You may use the format if you see fit. As everyone knows, I
> can't do anything briefly so it is a number of pages...
>
>
> Bud Yerly
> Custom Flight Creations, Inc.
> Tech support.
>>
>> ----- Original Message -----
>>
>> From: Europa <mailto:europa@pstewart.f2s.com>
>>
>> To: europa-list@matronics.com
>>
>> Sent: Friday, October 08, 2010 2:40 PM
>>
>> Subject: Europa-List: Test flying
>>
>>
>>
>> A couple of questions.
>>
>> 1. while at cruise speed the aircraft is neutral in pitch. At low speed
>> (flaps down) it tends to hold any pitch input (nose up or nose down). Anyone
>> any thoughts?
>>
>> 2. Does anyone have recognised check lists for a 914 mono?
>>
>>
>> Regards
>>
>> Paul nbsp; Features Chat, http://www.matronnbsp; via the Web
>> title=http://forums.matronics.com/
>> href="http://forums.matronics.com";>http://forums.matronics.com
>> <http://www.matronics.com/Navigator?Europa-List>
>> _p; generous bsp;
>> title=http://www.matronics.com/contribution
>> href="http://www.matronics.com/contribution";>http://www.matronics.com/c=====
>> ==========
>>
>>
>>
>
|