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Troy Maynor
Joined: 10 Jan 2006
Posts: 162
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 Posted: Sat Oct 31, 2009 7:58 pm Post subject: Rudder Lock |
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Hi All,
I desire to build a control lock for the rudder. Searching the archive I found the good idea of the pvc pipe assembly that goes onto the pedals and back to the stick or seat edge maybe, however I am looking at trailering my Europa a lot, at first anyway. It would seem this design would allow wind to whip the linkages and cables too much. Is there a nice one that can be clamped around the rudder itself and not mar the paint but hold it secure at highway speeds traveling backward? (It is a monowheel) Pictures would speak volumes.
Thanks in advance again...
Troy Maynor.......almost done......
[quote][b]
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rparigor(at)suffolk.lib.n
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frans(at)paardnatuurlijk.
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| Posted: Sun Nov 01, 2009 1:45 am Post subject: Rudder Lock |
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Troy Maynor wrote:
| Quote: | Hi All, I desire to build a control lock for the rudder. Searching
the archive I found the good idea of the pvc pipe assembly that goes
onto the pedals and back to the stick or seat edge maybe, however I
am looking at trailering my Europa a lot, at first anyway. It would
seem this design would allow wind to whip the linkages and cables too
much.
|
You are right indeed. I have some experience with (backwards) trailering
the Europa and forces when a truck passes from the opposite direction
are enormous. When I was trailering the Europa to the upholstery
companty I had a temporary lock that came off at the moment that a
truck passed and the rudder whacked back so I could feel it in the car.
Damage: the rudder tried to pivot over the rudder stop tab, and this
induces a tearing force on the hinge. I could see that the hinge area of
the rudder was stressed, small vertical cracks and a whitish appearance.
I later reinforced this with a couple of UNI layers perpendicular on the
cracks. This incident happened by the way with a speed of 80 Km (about
50 mph). I guess this is a speed very easily achieved by a tail slide,
so this incident is for me proof that a Europa will not be able to
handle even a small tail slide.
Anyway, my solution was to make a device just like shown by Ron
Parigoris in another post, except that mine is in a V-shape, and the
open end of the V is connected via a bolt that goes through the trim
slot. It is therefore quite low on the rudder, where I think most of the
forces and potential for damage is. And it doesn't try to twist the
whole rudder and fin assembly together. The legs of the V extent all the
way over the tailplane "stubs", so they have quite some leverage and the
forces spread over a large area that is already reinforced for the
tailplane.
The legs are made of metal tubing, with insulation around it.
The design works: the painter who did my airplane is 200 Km away from
here, had to get there when the wind was about 40 knots. On the way back
there was not much wind. But the airplane survived both travels without
any problems.
If my description is not clear, I will make pictures.
Frans
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hurstkr(at)redzone.com.au
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| Posted: Sun Nov 01, 2009 2:40 am Post subject: Rudder Lock |
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> I desire to build a control lock for the rudder
Troy,
Since the aircraft will be travelling backwards, if I were you, I would build a device on the trailer itself that restrains rudder movement. That way, you will not be relying on another part of the aircraft to take the strain. Ideally, I think I would also build an enclosure for the rudder and at least part of the tailplane to enter to protect it from winds while travelling.
Just my 2c worth.
Kingsley in Oz
[quote][b]
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frans(at)paardnatuurlijk.
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| Posted: Sun Nov 01, 2009 5:06 am Post subject: Rudder Lock |
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Kingsley Hurst wrote:
| Quote: | Since the aircraft will be travelling backwards, if I were you, I
would build a device on the trailer itself that restrains rudder
movement.
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I would caution *against* that!
The airplane will move a lot during travel, it sits on its own
suspension and rubber tires which allow quite some twisting and sideways
movement, and the tail of the airplane consequently moves as well. If
you restrict the movement at that point, you will use the tail as a
lever to restrict movement of the airplane, not good in my opinion, as
it is not designed to take such loads.
One option would be to restrict the airplane on multiple places (I tried
that), but then I discovered that the trailer, being of metal, will bend
and twist by itself. If you secure the airplane like that, you will use
the airplane to make the trailer more rigid, not a good idea either.
Apart from the problem that there are very few places on the airplane
suitable for securing the airplane like that anyway.
My solution to these problems: I put a winch on the trailer with a nylon
band, and use that to tow the airplane onto the trailer. I leave it
connected during the travel. At the same tail position, I connect two
straps to it, connected via two metal springs to the trailer. This will
form a triangle, restricting movement of the tail in all directions, but
due to the springs trailer movements won't jerk on the airplane. The
trailer is thus allowed to move a little bit under the airplane. A
second benefit of this is that the airplane can use its own tires and
springs to deal with bumps in the road, in addition to the suspension of
the trailer. This will be better for your gyro's, if you have them.
Frans
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hagargs(at)earthlink.net
Guest
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| Posted: Sun Nov 01, 2009 6:45 am Post subject: Rudder Lock |
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See attached photos
PVC. some all thread, rubber tubing, and a bolt.
Tested out, effective, no hassles
Steve Hagar
Mesa AZ A143
| Quote: | [Original Message]
From: Frans Veldman <frans(at)paardnatuurlijk.nl>
To: <europa-list(at)matronics.com>
Date: 11/1/2009 6:08:05 AM
Subject: Re: Rudder Lock
<frans(at)paardnatuurlijk.nl>
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| Quote: |
Kingsley Hurst wrote:
> Since the aircraft will be travelling backwards, if I were you, I
> would build a device on the trailer itself that restrains rudder
> movement.
I would caution *against* that!
The airplane will move a lot during travel, it sits on its own
suspension and rubber tires which allow quite some twisting and sideways
movement, and the tail of the airplane consequently moves as well. If
you restrict the movement at that point, you will use the tail as a
lever to restrict movement of the airplane, not good in my opinion, as
it is not designed to take such loads.
One option would be to restrict the airplane on multiple places (I tried
that), but then I discovered that the trailer, being of metal, will bend
and twist by itself. If you secure the airplane like that, you will use
the airplane to make the trailer more rigid, not a good idea either.
Apart from the problem that there are very few places on the airplane
suitable for securing the airplane like that anyway.
My solution to these problems: I put a winch on the trailer with a nylon
band, and use that to tow the airplane onto the trailer. I leave it
connected during the travel. At the same tail position, I connect two
straps to it, connected via two metal springs to the trailer. This will
form a triangle, restricting movement of the tail in all directions, but
due to the springs trailer movements won't jerk on the airplane. The
trailer is thus allowed to move a little bit under the airplane. A
second benefit of this is that the airplane can use its own tires and
springs to deal with bumps in the road, in addition to the suspension of
the trailer. This will be better for your gyro's, if you have them.
Frans
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jeff(at)rmmm.net
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| Posted: Sun Nov 01, 2009 9:44 am Post subject: Rudder Lock |
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Frans,
I did something like Steve did. I will eventually refine it to ride
lower but I don't tow mine. The foam sleeves protect the paint.
Jeff R.
A258 - N128LJ / Gold Rush
| Quote: |
> [Original Message]
> From: Frans Veldman <frans(at)paardnatuurlijk.nl>
> To: <europa-list(at)matronics.com>
> Date: 11/1/2009 6:08:05 AM
> Subject: Re: Rudder Lock
>
>
<frans(at)paardnatuurlijk.nl>
>
> Kingsley Hurst wrote:
>
>> Since the aircraft will be travelling backwards, if I were you, I
>> would build a device on the trailer itself that restrains rudder
>> movement.
>
> I would caution *against* that!
> The airplane will move a lot during travel, it sits on its own
> suspension and rubber tires which allow quite some twisting and
> sideways
> movement, and the tail of the airplane consequently moves as well. If
> you restrict the movement at that point, you will use the tail as a
> lever to restrict movement of the airplane, not good in my opinion, as
> it is not designed to take such loads.
> One option would be to restrict the airplane on multiple places (I
> tried
> that), but then I discovered that the trailer, being of metal, will
> bend
> and twist by itself. If you secure the airplane like that, you will
> use
> the airplane to make the trailer more rigid, not a good idea either.
> Apart from the problem that there are very few places on the airplane
> suitable for securing the airplane like that anyway.
>
> My solution to these problems: I put a winch on the trailer with a
> nylon
> band, and use that to tow the airplane onto the trailer. I leave it
> connected during the travel. At the same tail position, I connect two
> straps to it, connected via two metal springs to the trailer. This
> will
> form a triangle, restricting movement of the tail in all directions,
> but
> due to the springs trailer movements won't jerk on the airplane. The
> trailer is thus allowed to move a little bit under the airplane. A
> second benefit of this is that the airplane can use its own tires and
> springs to deal with bumps in the road, in addition to the suspension
> of
> the trailer. This will be better for your gyro's, if you have them.
>
> Frans
>
<DSCN0813.JPG><DSCN0809.JPG><DSCN0810.JPG><DSCN0811.JPG><DSCN0812.JPG>
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ptag.dev(at)tiscali.co.uk
Guest
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| Posted: Sun Nov 01, 2009 10:16 am Post subject: Rudder Lock |
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Hi!
I must just comment.....you can't beat a covered trailer with the trike
wheels winched against fixed chocks and a central ramp for the nose wheel
with screw bottle jacks holding the spring originally intended for the tail
wheel of the Mono held down into the central channel spine of the trailer
..it isn't going anywhere, and all parts of the aircraft are supported
where intended. (Works for Mono as well)
When parked on an airfield I use two lengths of water pipe insulation
material made into a loop with cable ties round each end to envelope the
rudder and fin.
Regards
Bob Harrison G-PTAG
--
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frans(at)paardnatuurlijk.
Guest
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| Posted: Sun Nov 01, 2009 10:49 am Post subject: Rudder Lock |
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Robert C Harrison wrote:
| Quote: |
Hi!
I must just comment.....you can't beat a covered trailer with the trike
wheels winched against fixed chocks and a central ramp for the nose wheel
with screw bottle jacks holding the spring originally intended for the tail
wheel of the Mono held down into the central channel spine of the trailer
...it isn't going anywhere, and all parts of the aircraft are supported
where intended. (Works for Mono as well)
|
Did you convert the Europa "factory" trailer for that, or is it a
completely new creation? If it is a Europa trailer "mod", I'm very
interested in the details. Although weight limitations for unregistered
trailers will probably prevent me from making a covered trailer... 
You wouldn't believe it, but here in the Netherlands it is much easier
to register your aircraft than to register a trailer.
Frans
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frans(at)paardnatuurlijk.
Guest
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| Posted: Sun Nov 01, 2009 10:49 am Post subject: Rudder Lock |
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JEFF ROBERTS wrote:
| Quote: | Frans,
I did something like Steve did. I will eventually refine it to ride
lower but I don't tow mine. The foam sleeves protect the paint.
|
Nice to see that everyone comes up with an almost similar solution. Mine
is not much different, except that it rides lower, and because the fin
ends there, I have to insert a bolt through the trim slot to keep both
halves of the lock connected.
If I did not intent to trailer my Europa, I would probably have made
something that can be just hang over the rudder and fin, like most
others do.
Frans
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ptag.dev(at)tiscali.co.uk
Guest
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| Posted: Sun Nov 01, 2009 12:42 pm Post subject: Rudder Lock |
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Hi! Frans
It was a completely independent steel creation and certainly weighs in XS of
any UK regulations but it is a special purpose trailor so circumvents some
of the pit falls. In actual fact it wasn't so much designed as evolved,
since to get the balance right for towing the twin axles were moved
rearwards three times and the wheels and tyres were up graded each time.
However I towed it to MT Propellers for harmonics tests in Bavaria behind my
Volvo Estate saloon.
It is fitted with two very large rear box doors which when closed
sufficiently balances the drawbar so that with the front axle mounted on
three inch ramps(with the aircraft inside) the draw bar can be lifted up by
one hand to about 4 ft high for easier discharge of the 'plane.
It is lined inside with spray on foam insulation which keeps it cool in high
summer.
The purpose being that it is a permanent safe hanger for parking on my
drive.
Regards
Bob Harrison.
--
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topglock(at)cox.net
Guest
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| Posted: Mon Nov 02, 2009 8:12 am Post subject: Rudder Lock |
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I also used the PVC lock, but found it to be inadequate for towing.
What I did do was to hollow out a piece of 3/4" plywood, to accommodate
the shape of the tailplane and line the opening with carpet (foam would
work, also). This has proven to be very ridged and does a nice job of
holding the rudder firmly...
Jeff - Baby Blue
Frans Veldman wrote:
| Quote: |
JEFF ROBERTS wrote:
> Frans,
> I did something like Steve did. I will eventually refine it to ride
> lower but I don't tow mine. The foam sleeves protect the paint.
Nice to see that everyone comes up with an almost similar solution. Mine
is not much different, except that it rides lower, and because the fin
ends there, I have to insert a bolt through the trim slot to keep both
halves of the lock connected.
If I did not intent to trailer my Europa, I would probably have made
something that can be just hang over the rudder and fin, like most
others do.
Frans
------------------------------------------------------------------------
Checked by AVG - www.avg.com
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