And this is the top end, which rotates freely in a piece of brass tube to allow tightening. The end of the wire is capped with a thin piece of tube to hold it in place. Hope all this makes sence to you.
< Message edited by CTDavies -- 4/6/2007 8:53:31 PM >
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
The struts are sandwiched between some thick balsa strips to hold it firmly in place to allow correct lengthening of the wires. It is much easier to work on it this way.
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
Landing wires; these are the wires that are under tension when the aeroplane is on the ground, as opposed to the flying wires that are tensioned when the plane is flying. I decided to do the landing wires first as these are easier. The foot fixing is the capped rotating wire in brass tube.
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
Here's the top fitting of the landing wires with rod coupler in threaded tube for tightning. Once I've done all the landing wires I'll start the flying wires. See you then.
< Message edited by CTDavies -- 4/6/2007 9:33:32 PM >
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
Posts: 5177
Joined: 2/13/2004 From: Zentsuji, JAPAN Status: offline
Wow, how did I miss all these updates? I think you're right about doing the strut cross-bacing first -- and about trying to make these units as rigid as possible. I'm seriously considering make mine completely non-adjustable and putting a spot of solder in the middle. I like the idea of doing them over the plans as the length of these wires (particularly the front top to bottom rear wire) in effect sets the lower wing incidence/washout. So this is fairly critical.
This is what our Pup looks like with rigging and closed loop wires etc, everything installed. Basically it is ready to cover now, but some of the rigging will have to be removed again for covering. We will take it to the local photographer's on Monday to get some nice glossy glamour shots, for which we wanted it to be fully rigged. These glamour shots will later be used for the manual and box top etc, but we couldn't wait until Monday to show it to you all. We'll still post some of the images we get on Monday if the turn out ok.
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
Posts: 26
Joined: 8/18/2003 From: Ridgefield,
CT, USA Status: offline
Looks wonderful Chris,
A couple of quick questions if you don't mind. There looks to be guide tubes for aileron control cables in the wings. Are these pull-pull controls? Also, why the sheeted bay behind the rear spar just inboard the of ailerons? Would a diagonal member not have been enough? I am just thinking what the structure will look like if covered with CDL instead of being painted?
A couple of quick questions if you don't mind. There looks to be guide tubes for aileron control cables in the wings. Are these pull-pull controls? Also, why the sheeted bay behind the rear spar just inboard the of ailerons? Would a diagonal member not have been enough? I am just thinking what the structure will look like if covered with CDL instead of being painted?
Thayer
Hi Thayer,
the top wing ailerons are connected with a flex cable running through brass guide tubes as shown on the first image. The bottom ailerons are connected to bellcranks via piano wire pushrods (second image). These are connected to the servo which is in the fuselage. The top and bottom ailerons are again connected to each other also with piano wire which makes the closed loop. I like to use a sheet for that last bay before the aileron cutout as the wing rib/trailing edge joint there is very weak and nearly always breaks at one time or another. I guess a gusset/diagonal stick combination would also work, but I've been doing it this way since the old Radio Modeller days - old habits die hard, they say
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
The top aileron cables (left and right) are connected with a tube/socket connector within the wing center section. To connect the wires both ailerons are moved to the full up position, the left wing panel is left with a 1" gap to the center section and the smaller diameter tube is pushed into the larger one until the holes are aligned. They are then locked by a small piece of piano wire that fits into the hole. When the ailerons are lowered the left panel can be pushed against the center section and the connector slips into its tube in the center section.
_____________________________
"there is no Dark Side of the Moon really, as a matter of fact it's all dark"
Printable Version
All Forums >> RC Airplanes >> RC Scale Aircraft >> RE: CD-Scaledesigns Sopwith Pup Prototype 
RE: CD-Scaledesigns Sopwith Pup Prototype - 
