All you need for any trim is a Gurney Flap. Just a short piece of foam
or balsa stuck under the trailing edge on one side to deflect that
surface up, (or sideways if rudder)
Do a Google on Gurney flaps.
btw Your elevator trim tab has Gurney flaps both sides to cut through
the boundary layer.
Graham
GLENN CROWDER wrote:
>
>
> I sure don't need rudder trim on mine. Flies very straight at all
> speeds with no rudder
> trim tab. When I fly with a 200 lb passenger, I can just rest my left
> foot on the rudder
> pedal to counteract small right roll tendency. For long flights with a
> passenger, I have
> a small bolt on rudder trim tab but I haven't even used it in 3 years.
> Lots of extra
> complication for no benefit!
>
> Glenn
>
>> From: <rparigor@suffolk.lib.ny.us>
>> Reply-To: europa-list@matronics.com
>> To: <europa-list@matronics.com>
>> Subject: Europa-List: Thoughts on rudder trim needed?
>> Date: Mon, 22 Jan 2007 02:48:50 -0000
>>
>>
>> Our Monowheel XS with a 914 and Airmaster has both short and long wings.
>> Will have servo trim tab for roll on both. Will fly short first for a
>> while.
>>
>>
>> I was wondering if I could get opinions on rudder trim.
>>
>> Is it worth it to install inflight adjustable trim?
>>
>> Or is it possible that somehow we managed to build an airframe where both
>> sets of wings would need no rudder trim? Flies straight in thermal
>> soaring
>> mode with long wings, as well as heavy fast short wing flight.
>>
>> Or if rudder trim is needed it is more of a fuse thing, and if needed a
>> double sticky tab is all that is needed and would work on both short and
>> long, and for the most part rudder trim is just not that speed sensative?
>>
>> If there was a slight difference between short and long, a calibrated by
>> eyecrometer bend on tab, or added 1/2 of a flettner strip for a given
>> wing
>> makes the most sense?
>>
>> Anyone have an inflight adjustable rudder trim that they think is a great
>> feature? Like have an airplane that at different speeds requires
>> different
>> rudder trim and being able to adjust just adds to the pleasure of flyin?
>> If yes what is dimensions of trim tab you use with how much deflection?
>>
>> Thx.
>> Ron Parigoris
>>
>>
>>
>>
>>
>>
>>
>>
>
> _________________________________________________________________
> Turn searches into helpful donations. Make your search count.
> http://click4thecause.live.com/search/charity/default.aspx?source=hmemtagline_donation&FORM=WLMTAG
>
>
>
>
>
>
>
>
--
Graham Singleton
Tel: +441629820187
Mob: +447739582005
|