RE: CMPro Giles 202 - 50  
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All Forums >> RC Airplanes >> ARF or RTF >> RE: CMPro Giles 202 - 50
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RE: CMPro Giles 202 - 50 - 5/27/2008 9:54:14 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		I haven't, though I'd imagine that Mini's would work fine.

They should provide enough clearance.

I doubt you would need to do this for weight issues though.

Even with an anti-vibration mount, pitts muffler, etc., which all add weight. I've have my battery forward.

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       Post #: 101

RE: CMPro Giles 202 - 50 - 5/28/2008 2:52:30 PM   
ysteve1


 

Posts: 44
Joined: 11/8/2002
From: San Antonio, TX, USA
Status: offline 		well i'm not really worried about the weight, i just couldn't get the supplied linkage to work. It seems as tho the CF rod is way too long. I measured it and it is 600mm like listed in the docs but that length is the same distance from where the servo is suppose to go and to the end of the plane where the tailwheel mounts. so how are the linkage suppose to bend to fit, or was i suppose to cut the CF rod?


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steve

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       Post #: 102

RE: CMPro Giles 202 - 50 - 5/28/2008 5:25:01 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		I don't recall cutting the rod, though it is possible that I did.

I do remember that the metal pushrod ends could be adjusted in length to fit.

I loosely installed the rods, and affixed the elevator side linkages.

Then I adjusted the length of the rod end closest to the servo and affixed it in place.

It's worked fine, and there is NO lateral play ( no flutter! ) while the rods hold quite firmly.

I have not been displeased with this arrangement.



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       Post #: 103

RE: CMPro Giles 202 - 50 - 5/28/2008 8:50:49 PM   
ysteve1


 

Posts: 44
Joined: 11/8/2002
From: San Antonio, TX, USA
Status: offline 		for some reason my CF rod extends past the exit holes for the linkage on the sides and a little past the hole cut out for the servo. so are you suppose to bend the linkages in the shape of a 'S' to make it fit?


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steve

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       Post #: 104

RE: CMPro Giles 202 - 50 - 5/28/2008 9:04:31 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		No cut it down.

I found a piece of my CF rod in my "leftovers" box, so I did cut mine down... My leftover piece was about 3.5" long or so.

Measure carefully first!

It's ok to get the CF rod a little long, as you can adjust the wires.

The other way around will cause you to look for another mechanism altogether...

If I recall correctly, the wires on one side can be moved in and out to establish the final length. I believe I used screw on adjustable connects at the servo to I could fine tune the elevators later.

Remember that when you bend the "Y" out at the elevator, you will be shortening it a bit, so allow for this with the CF rod too.

I had some Dubro "exit" hole plastic inserts available that I installed at the elevator wire exits to make it look nice.



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       Post #: 105

RE: CMPro Giles 202 - 50 - 5/28/2008 9:23:24 PM   
ysteve1


 

Posts: 44
Joined: 11/8/2002
From: San Antonio, TX, USA
Status: offline 		Nice, good to know. I thought i was going crazy.
Unfortunately i already epoxied the black ends on the CF rod (that's what i get for not test fitting first). it shouldn't be too hard to cut the rod and then clean off all excess crap off the end


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steve

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       Post #: 106

RE: CMPro Giles 202 - 50 - 5/28/2008 10:38:04 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline 		You could leave them in place and cut down the rod to size, then epoxy it together.

Wax paper does not adhere to epoxy, so you re-attach the two cut portions using epoxy, and wipe off the excess and wrap with epoxy to keep things straight.

You could also wrap tape or a plastic wrap around this.

It's not going to ever be visible so as long as it is strong who cares.



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       Post #: 107

RE: CMPro Giles 202 - 50 - 5/28/2008 11:34:45 PM   
paul49


 

Posts: 20
Joined: 7/15/2007
From: Newcastle, AUSTRALIA
Status: offline 		Hi Steve and opjose,

I eventually gave up on the single pushrod as I couldn't find a way to fit the two wires down the fuselage and out through the slots. (Apart from a trainer and an easy-build electric, this is my first build which required a bit of thought so I probably have missed something obvious to a more experienced assembler.) I remember someone posting that it was easier if you did this before you glued in the horizontal stab. so you could get your fingers in to assist but it was too late for me. Then I tried Sullivan Goldenrods but couldn't think of an easy way to secure them inside the fuselage. Finally I used two servos and two pushrods and this was easy to install and mix in the radio. However, it occurred to me that this method allowed for some sideways movement of the rods and your comment, opjose, makes me wonder if this will be a problem. My trainer uses single pushrods for the rudder and elevator and, if you grab one of the surfaces and try to move it, the pushrod bangs around inside the fuselage. But it doesn't seem to affect the way the plane flies. I still haven't quite finished the Giles so I don't know how it will fly.
Should I be thinking of restricting the sideways movement of the pushrods in the Giles?

Cheers,
Paul.

(in reply to opjose)
       Post #: 108

RE: CMPro Giles 202 - 50 - 5/29/2008 4:25:26 PM   
ysteve1


 

Posts: 44
Joined: 11/8/2002
From: San Antonio, TX, USA
Status: offline 		Paul,
in past experience you want to have those pushrod anchored somehow. depending on your flying style the movement of the pushrods could effect the flight of the aircraft (flutter) and the response time of the control surfaces.
Also if you plan on running long linkage then i would go with a min of 4-40 rod. One way that i have anchored long linkage in the past is to CA light ply down the center (vertical or horizontal) of the fuselage (near where the wing bolts are) and run the linkage thru those (you can run the linkage thru plastic sleeves that are glued to the light ply and glued to the exit by the tail). that will help the lateral movement of the pushrods


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steve

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       Post #: 109

RE: CMPro Giles 202 - 50 - 5/29/2008 4:52:21 PM   
opjose



Posts: 5832
Joined: 11/26/2005
From: Poolesville, MD, USA
Status: offline
quote:

ORIGINAL: paul49

Hi Steve and opjose,

I eventually gave up on the single pushrod as I couldn't find a way to fit the two wires down the fuselage and out through the slots.


I've done this with many planes so I found it somewhat easy.

You bend the wires out slightly and insert the rod 90 degrees to it's eventual orientation.

Sometimes I put a piece of wire or string on each side to act as a leader... inserting the string all the way back and out first.

I then get the rod all the way down the fuse, and work it almost into position, then pull the string to get the rods to slip out of the slots.


quote:

ORIGINAL: paul49
My trainer uses single pushrods for the rudder and elevator and, if you grab one of the surfaces and try to move it, the pushrod bangs around inside the fuselage. But it doesn't seem to affect the way the plane flies. I still haven't quite finished the Giles so I don't know how it will fly.
Should I be thinking of restricting the sideways movement of the pushrods in the Giles?

Cheers,
Paul.


As ysteve1 said, normally this is of big concern, as any time there is lateral movement you have the opportunity for flutter.

However that said, with the arrangement in the Giles I haven't had any problems.

The "three point" positioning seems to prevent lateral movement.... and I've pushed this plane quite hard.



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RE: CMPro Giles 202 - 50 - 6/1/2008 10:56:43 AM   
mattmc


 

Posts: 6
Joined: 12/6/2006
From: Melbourne, AUSTRALIA
Status: offline 		Giles Flight 2

Flight 2, Incident 2 - Hot landing - http://fangin.com/blog/?p=173

Giles Flickr pix


< Message edited by mattmc -- 6/2/2008 11:00:40 AM >

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       Post #: 111

RE: CMPro Giles 202 - 50 - 6/2/2008 12:29:41 AM   
paul49


 

Posts: 20
Joined: 7/15/2007
From: Newcastle, AUSTRALIA
Status: offline 		Sorry to hear about that, matt, but I like what I can see of the "checkerboard" repair you've made where the covering peeled off a few weeks ago. Do you have any side-on photos?
Also interesting that we both have a Giles and a PA Addiction . My Addiction is still in the box waiting until I finish building the Giles.

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       Post #: 112

RE: CMPro Giles 202 - 50 - 6/2/2008 11:37:26 AM   
mattmc


 

Posts: 6
Joined: 12/6/2006
From: Melbourne, AUSTRALIA
Status: offline 		Paul,

Some side on photos.
The Addiction is a lot of fun and a quick build too.
What stage are you up to on the Giles?

Giles Flickr pix




< Message edited by mattmc -- 6/30/2008 8:36:42 AM >

(in reply to paul49)
       Post #: 113

RE: CMPro Giles 202 - 50 - 6/2/2008 10:23:17 PM   
paul49


 

Posts: 20
Joined: 7/15/2007
From: Newcastle, AUSTRALIA
Status: offline 		To finish the Giles, I just have to cut the openings in the cowl, hook up the throttle servo, fit the fuel tank and canopy.
I was thinking that your new colour scheme would help with orientation. My distance vision isn't quite so good any more and the standard Giles looks the same top and bottom whereas the underside of yours is very obvious.

(in reply to mattmc)