Today's Message Index:
----------------------
1. 12:19 AM - Re: Vortex generators update (aerosiam)
2. 12:23 AM - Re: Brake problem (aerosiam)
3. 04:45 PM - Re: Vortex generators update (Roger Lee)
4. 05:53 PM - Re: Vortex generators update (aerosiam)
5. 06:19 PM - Stiff ailerons (aerosiam)
6. 06:32 PM - Lubricating flap motor screw shaft (aerosiam)
7. 06:43 PM - Re: Re: Vortex generators update (Hugh)
8. 07:07 PM - FW: Re: Vortex generators update (Hugh)
9. 07:15 PM - Re: Stiff ailerons (Hugh)
10. 07:35 PM - Re: Lubricating flap motor screw shaft (Hugh)
Message 1
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Subject: | Re: Vortex generators update |
The VGs were tested on an ultralight/experimental aircraft in Thailand which has
considerable flexibility in its regulations.
When I visited fantasy air to buy my aircraft, I suggested I would do a VG test.
Their view (and the designer) was that VGs would not make that much difference.
I emailed them the report (which I posted on this site) but they did not respond.
I have no idea what would be needed to getting the factory involved but having
flown for several months now with the VGs, I am very happy to have them on the
plane. The landing characteristics and general handling are nicer all round.
Paul
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Subject: | Re: Brake problem |
Thanks for the feedback.
I suspect a new seal would improve the brakes and they did really work well when
new.
Regards
Paul
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Subject: | Re: Vortex generators update |
Hi Paul,
I have done a few mods to my Flight Design CT. I did get factory approval and it
has to be in writing. If you do not have that then that puts you out of SLSA
compliance and out of insurance. You can bet the insurance company will blame
the VG's if you have a accident. I have a form letter that is good for any factory
mod and it has to have certain wording for the FAA to be happy. It is short
and sweet, but needs to be sent to the factory. You need to take 3 pictures
of the mod and send it in with the letter. Most Mfg's already know of this letter
of approval.
You need to dog the factory and get this approved for your own benefit. Remember
an SLSA is no different than a GA aircraft when it comes to mods. The FAA says
if something is in the manual it is a minor repair, if it is not in the manual
then it is considered a major repair and needs the factory approval and a
rated mechanic for the mod.
--------
Roger Lee
Tucson, Az.
Light Sport Repairman - Maintenance Rated
Rotax Service Center
520-574-1080
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Subject: | Re: Vortex generators update |
Hi Roger
Interesting. I imagined getting a mod approved would be a difficult process.
In the case of the VGs, I would think Fantasy Air would want their test pilot to
do test flights.
The factory does not have the best reputation for responding to customers and I
doubt they would make the effort to test the VGs.
If Hugh or anyone else is seriously interested, maybe we could get the factory
interested.
When I was in Czech in 2005, I offered to pick up the tab for fuel if they paid
their test pilot for a series of test flights.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192750#192750
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Our aircraft came with stiff ailerons. We traced the problem to a shaft misaligned
in a nylon bushing (the red shaft that attaches to the bellcrank in the top
of the cabin.) We drilled out the bearing slightly and on the ground, the ailerons
now feel loose and normal.
However in the air, they have a 'break-out' force. If the pilot applies a positive
movement of a few inches to roll, it is ok. But if he tries to make small
normal corrections in flight of half an inch, there is considerable resistance.
I will try a spring gauge next time I fly, but I'm guessing that it takes a
4 pound force before the stick will move off center. It is tiring and irritating
to fly.
Does anyone have the same problem or have an idea what might be causing it?
One possibility is that the fuselage cage bends slightly in flight and still pinches
the shaft which was originally misaligned. Maybe we need to ream out the
nylon bushing more but without comparing to another aircraft, it is difficult
to assess.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192754#192754
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Subject: | Lubricating flap motor screw shaft |
The flap motor operates a vertical screw shaft which rotates in a nylon bushing
riveted to the flap actuating arm. It is accessible after removing the white
cover behind the pilot's seat.
The screw shaft should be lubricated with lithium grease, I believe.
If a 3 in 1 type oil is applied to the metal screw shaft, it causes the nylon bushing
to expand. Over time, flap movement slows and the flap breaker starts popping
due to the excess load. The cure is to tap out the nylon bushing until
the screw shaft moves freely inside it.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192757#192757
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Subject: | Re: Vortex generators update |
Roger/Paul:
My Allegro 2000 is an E-LSA so I don't have your paperwork and approval
problem. However, based on how my Allegro is performing I have not yet
decided that I need the V
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of aerosiam
Sent: Monday, July 14, 2008 8:52 PM
Subject: Allegro-List: Re: Vortex generators update
Hi Roger
Interesting. I imagined getting a mod approved would be a difficult process.
In the case of the VGs, I would think Fantasy Air would want their test
pilot to do test flights.
The factory does not have the best reputation for responding to customers
and I doubt they would make the effort to test the VGs.
If Hugh or anyone else is seriously interested, maybe we could get the
factory interested.
When I was in Czech in 2005, I offered to pick up the tab for fuel if they
paid their test pilot for a series of test flights.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192750#192750
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Subject: | Re: Vortex generators update |
-----Original Message-----
From: Hugh [mailto:hgmckay@bellsouth.net]
Sent: Monday, July 14, 2008 9:58 PM
Subject: FW: Allegro-List: Re: Vortex generators update
Roger/Paul:
Sorry, I hit a send button by mistake before finishing my message. Here is
the finished one.
My Allegro 2000 is an E-LSA so I don't have your paperwork and approval
problem. However, based on how my Allegro is performing I have not yet
decided that I need the VGs. I do know that they improve performance at the
lower speeds, but how much? The Allegro is such a slick plane and it glides
so well, I'm not sure I would put the VGs on. The choice would seem to me to
be a personal one rather than a "major change in performance". I may be
wrong, and am open to the opinion of others.
In my opinion, based on my experience over the past 3 years with Fantasy Air
Czech Republic), as well as the US Distributor, you will have a very
difficult time getting them to do the testing and paperwork to satisfy the
FAA. In fact I personally would not waste my time! I would rather spend it
flying and enjoying life.
Regards,
Hugh McKay
Allegro 2000
Rotax 912UL
N661WW
-----Original Message-----
From: Hugh [mailto:hgmckay@bellsouth.net]
Sent: Monday, July 14, 2008 9:42 PM
Subject: RE: Allegro-List: Re: Vortex generators update
Roger/Paul:
My Allegro 2000 is an E-LSA so I don't have your paperwork and approval
problem. However, based on how my Allegro is performing I have not yet
decided that I need the V
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of aerosiam
Sent: Monday, July 14, 2008 8:52 PM
Subject: Allegro-List: Re: Vortex generators update
Hi Roger
Interesting. I imagined getting a mod approved would be a difficult process.
In the case of the VGs, I would think Fantasy Air would want their test
pilot to do test flights.
The factory does not have the best reputation for responding to customers
and I doubt they would make the effort to test the VGs.
If Hugh or anyone else is seriously interested, maybe we could get the
factory interested.
When I was in Czech in 2005, I offered to pick up the tab for fuel if they
paid their test pilot for a series of test flights.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192750#192750
Message 9
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Paul:
Since my Allegro is an E-LSA (I built it from the Q-Build Kit), I can tell
you that I had to ream the nylon bushing to get the shaft that passes
through it to turn smoothly. This was due to a "tight fit" rather than
misalignment. However, in your case if the shaft is still misaligned, you
may have to do more than just "drilling out the bushing". If you know the
problem is a shaft misalignment, can you correct the misalignment itself? I
would try to do that first before I did any more "drilling". I don't know
how this affects your SLSA status.
Hugh McKay
Allegro 2000
Rotax 912 UL
N661WW
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of aerosiam
Sent: Monday, July 14, 2008 9:18 PM
Subject: Allegro-List: Stiff ailerons
Our aircraft came with stiff ailerons. We traced the problem to a shaft
misaligned in a nylon bushing (the red shaft that attaches to the bellcrank
in the top of the cabin.) We drilled out the bearing slightly and on the
ground, the ailerons now feel loose and normal.
However in the air, they have a 'break-out' force. If the pilot applies a
positive movement of a few inches to roll, it is ok. But if he tries to make
small normal corrections in flight of half an inch, there is considerable
resistance. I will try a spring gauge next time I fly, but I'm guessing that
it takes a 4 pound force before the stick will move off center. It is tiring
and irritating to fly.
Does anyone have the same problem or have an idea what might be causing it?
One possibility is that the fuselage cage bends slightly in flight and still
pinches the shaft which was originally misaligned. Maybe we need to ream
out the nylon bushing more but without comparing to another aircraft, it is
difficult to assess.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192754#192754
Message 10
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Subject: | Lubricating flap motor screw shaft |
Paul:
I was not aware that the screw part of the shaft screwed (operated) in a
matching nylon female screw. I have been lubricating the steel screw with
white lithium grease without a problem for two years. I certainly will not
use oil on the screw after reading your post. If oil causes the nylon to
expand over time, why would'nt the Lithium grease do the same thing?
Hugh McKay
Allegro 2000
Rotax 912 UL
N661WW
-----Original Message-----
From: owner-allegro-list-server@matronics.com
[mailto:owner-allegro-list-server@matronics.com] On Behalf Of aerosiam
Sent: Monday, July 14, 2008 9:30 PM
Subject: Allegro-List: Lubricating flap motor screw shaft
The flap motor operates a vertical screw shaft which rotates in a nylon
bushing riveted to the flap actuating arm. It is accessible after removing
the white cover behind the pilot's seat.
The screw shaft should be lubricated with lithium grease, I believe.
If a 3 in 1 type oil is applied to the metal screw shaft, it causes the
nylon bushing to expand. Over time, flap movement slows and the flap breaker
starts popping due to the excess load. The cure is to tap out the nylon
bushing until the screw shaft moves freely inside it.
Regards
Paul
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=192757#192757
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