The way that bud suggests is to use the front end of the flap slot in the
rear fuselage and the baggage bay bulkhead - build up the required shim
with flox. bud's suggestion worked for me ...but I have a tri not a mono
William Daniell
LONGPORT
+1 786 878 0246
On Tue, Jul 4, 2023 at 3:44=AFPM JDA <johndavidamos@gmail.com> wrote:
>
> Does anyone have any advice on adjusting the flap rigging once the initia
l
> build has been completed? My monowheel has slightly more flap (about 1deg
)
> on the RHS. The upshot is that it rolls left - even with a passenger on
> board. I have to carry a bit of aileron to compensate which is easily
> trimmed out, but because of this the aircraft always drops a left wing in
> the stall - and sometimes quite dramatically! If I stall with the stick i
n
> the middle and keep the wings level with rudder I can sit in the heavy
> buffet without wing drop. Because of the benign stick-central stall I am
> reluctant to use stall strips, although this remains a last-ditch solutio
n.
> I would rather fix the problem at source and level up the flaps - it is
> only a tiny amount. The Europa Club archives has some notes by Bud Yerly:
> he advocates trimming the flaps by shimming the flap drive tube against t
he
> baggage bulkhead to "twist" the tube. However having spent a day with a
> torch and a lot of head scratching!
> I cannot work out exactly how this would work in practice - and in any
> case there is no bulkhead for me to easily shim against. It seems to me
> that it would be a far easier solution to shim one of the flap drive tub
e
> brackets (FL18) on the floor of the fuselage to raise one side of the tub
e
> - if only they weren't bonded in place! My proposed solution therefore is
> to obtain a replacement torque tube hinge arm FL16 (undrilled) from Europ
a,
> and re-drill the holes to effectively shorten the arm and drop the flap o
n
> one side by one degree. This would cause a little twisting, but the whole
> flap assembly across the span appears flexible with a little play - and w
e
> are only talking about 1 deg as measured at the flap which is a tiny amou
nt.
> My questions are: has anyone successfully adjusted their flap rigging
> before? How was it done? Has anyone used Bud's solution who can explain h
ow
> it works in practice? Can anyone think of a technical objection to my own
> proposal above?
> To answer the obvious question: I am in the UK and subject to the LAA. My
> inspector would be involved and I am already sharing my thoughts with him
,
> but neither of us wants to re-invent the wheel if it has been done before
!
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=511036#511036
>
>
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