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  #1  
Old August 23rd 16, 10:17 PM posted to rec.aviation.soaring
Dave Nadler
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Default Arcus owners not monitoring the Arcus newsgroup...

Assembly info he
https://groups.google.com/d/msg/sche...w/7Ufemdv0BQAJ
Enjoy!
See ya, Dave
  #2  
Old August 24th 16, 03:51 AM posted to rec.aviation.soaring
[email protected]
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Default Arcus owners not monitoring the Arcus newsgroup...

I have been assembling and disassembling the Arcus "J" (jet engine conversion by Desert Aerospace) using the WingRigger I specifically built for this application. The prototype unit went to Al Simmons, who appears to be satisfied and pleased with it. To counteract the high spring forces necessary to handle the heavy Arcus wing, the gas spring is augmented by a remotely controlled 12 volt 225 lb. capacity linear actuator. Not only does it make height adjustments effortless, it also enables the user to easily lower the saddle to the lowest position so that the second wing can be removed from the trailer. So far, we have had excellent results. For more information, please contact me through info (at) mmfabrication (dot) com. Photos and video are not yet available on my website, but will be coming soon. www.wingrigger..com
  #3  
Old August 24th 16, 02:10 PM posted to rec.aviation.soaring
Dave Nadler
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Default Arcus owners not monitoring the Arcus newsgroup...

On Tuesday, August 23, 2016 at 10:51:19 PM UTC-4, wrote:
...To counteract the high spring forces necessary to handle the heavy
Arcus wing, the gas spring is augmented by a remotely controlled
12 volt 225 lb. capacity linear actuator.


With a properly sized electric linear actuator, the gas spring is
unnecessary, and adds additional weight/complexity...

The wing dolly as I modified should now be available from IMI.
It is beautifully built, has an adequate axle that does not bend,
and is very light weight.

Thanks,
Best Regards, Dave
  #4  
Old August 25th 16, 01:42 AM posted to rec.aviation.soaring
[email protected]
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Gee, Dave- when we were corresponding last year about an Arcus model WingRigger, you were adamant that the linear actuator was "too complex and unnecessary." Now it is the gas spring that is too complex and unnecessary. How things change. I find that a combination of the spring and actuator is preferable.
  #5  
Old August 25th 16, 02:33 AM posted to rec.aviation.soaring
Dave Nadler
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Default Arcus owners not monitoring the Arcus newsgroup...

On Wednesday, August 24, 2016 at 8:42:29 PM UTC-4, wrote:
Gee, Dave- when we were corresponding last year about an Arcus model
WingRigger, you were adamant that the linear actuator was "too complex
and unnecessary."...


Unfortunately, the proportionality of a gas spring that fits inside the
IMI structure is too high - otherwise gas spring would be preferable.
If you can fit a gas spring with more constant force, that would be best.

I find that a combination of the spring and actuator is preferable.


Using both is just unnecessary complexity, cost, and weight.


Now, how about a thank-you for repeatedly providing you with engineering
data and measurements, instead of snide comments? Really now.

Thanks,
Best Regards, Dave
  #6  
Old August 25th 16, 03:50 AM posted to rec.aviation.soaring
[email protected]
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Dave, your "engineering data and measurements" were not needed nor used. I am satisfied with my solution. The extra 1.1 lb. of the gas spring means I can use a lower capacity actuator (thus less costly) by using a properly sized gas spring as a load assist. I am sure the IMI unit is satisfactory, but it is not the only solution.

"Thanks" anyway.
  #7  
Old August 26th 16, 07:32 AM posted to rec.aviation.soaring
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On Tuesday, August 23, 2016 at 5:17:52 PM UTC-4, Dave Nadler wrote:
Assembly info he
https://groups.google.com/d/msg/sche...w/7Ufemdv0BQAJ
Enjoy!
See ya, Dave


Alignment suggestion: how about a simple sight gauge? A removable fixture sitting on top of the fuselage (maybe 1” pvc pipe attached to a FG saddle) which "fixes" two vertical “whiskers” aligning perpendicular to the fuselage center-line. These “whiskers” would be spaced as far apart as possible without interfering with walking out the wing. With the fixture on the fuselage top “sweet spot", just "gun sight" the whiskers while out at the tip until properly aligned with a reference point on your wing. Wing should then be positioned close enough to align dead on within the adjustable travel of the rigger base if needed. KISS rocks.

More important suggestion: the thought of lifting any wing tip and carrying its load to full extension while stepping over a mid-way pivot rigger is inviting a probable trip/fall/damaged wing and SCREAMS oh my aching back. With rigging aids becoming the norm and the linear actuators proving to be so helpful, pilots with bad backs and especially “bus” or “big bird” pilots need a dual purpose rigging aid. First it would serve as a “wingout” device; it would be used to capture wing tip handles and lift the wing tip so the wing could be rolled straight back to full extension. Once fully extended, the linear actuator would transfer the wing tip load to a purpose built tip stand. Once on the tip stand, the aid would be converted into the current wing cuff pivot rigger and manage the positioning and rotating of the wing until the wing root is seated into the fuselage. I think a dual purpose rigging aid could use the existing IMI or Enstroj (another well designed pivot rigger) actuated base and reengineered to offer easily interchanged “wingout” and pivoting wing cuff “heads” to handle all the lifting loads.

Proof of concept should develop an easy process which eliminates any lifting heavier than what is required to lift the trailer clamshell roof.

(Dave, please share the sight gauge idea with the ARCUS group.)

And ya’ll quit slinging cow piles at each other.
  #8  
Old August 26th 16, 11:39 AM posted to rec.aviation.soaring
Casey[_2_]
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Default Arcus owners not monitoring the Arcus newsgroup...



And ya’ll quit slinging cow piles at each other.


And I thought I was the only one that got cow patties thrown at me.
  #9  
Old August 26th 16, 12:32 PM posted to rec.aviation.soaring
Dave Nadler
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Posts: 1,610
Default Arcus owners not monitoring the Arcus newsgroup...

On Friday, August 26, 2016 at 2:32:43 AM UTC-4, wrote:
Alignment suggestion: how about a simple sight gauge?
A removable fixture sitting on top of the fuselage (maybe 1” pvc pipe
attached to a FG saddle) which "fixes" two vertical “whiskers” aligning
perpendicular to the fuselage center-line. These “whiskers” would be spaced
as far apart as possible without interfering with walking out the wing. With the fixture on the fuselage top “sweet spot", just "gun sight" the
whiskers while out at the tip until properly aligned with a reference
point on your wing. Wing should then be positioned close enough to align
dead on within the adjustable travel of the rigger base if needed.


Hi Marshall - Perhaps I don't understand? A sight-gauge on the fuselage
won't help if my eye (at the root) is in the right location, but the
center of the wing (in the dolly) is not.

KISS rocks.


Absolutely. I'm going to try a string-gauge that places a target for
the wing-dolly column on the ground. Maneuver the wing dolly til the
support column is over the target, then swing root to fuselage and
rotate.

More important suggestion: the thought of lifting any wing tip and
carrying its load to full extension while stepping over a mid-way
pivot rigger is inviting a probable trip/fall/damaged wing and
SCREAMS oh my aching back.


Its not that bad! IIRC wing-tip is 40kg.

...pilots need a dual purpose rigging aid.
First it would serve as a “wingout” device...


Spindelberger makes a wing-tip roll-out device for the ASH-30
inner wing panel. The Arcus wing shape makes this harder.
And, a wing-tip device adds more parts and complexity...

Thanks Marshall,
See ya, Dave
  #10  
Old August 26th 16, 01:29 PM posted to rec.aviation.soaring
Muttley
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Default Arcus owners not monitoring the Arcus newsgroup...

Hi all

rather than walking the rigger in an Arch to the fuselage i used to walk it quite far out with right angles which gives you a long last leg to line it up better with the fuselage, also putting the wing flat for the last leg gives you a better feel and sight of what you are at. (Duo Discus)
 




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