wire rigging

[Den Moran]

Hi, everyone,

I'm rebuilding the wing support system for a Hobbyking Flybaby (44" w/s), and need to make up the wire support system. The system leads upwards from the axle ends to two bolts through the wing, and these bolts feed wire back to the single fuselage point above the wing.

My problem is sourcing fittings that will carry the wire, (sourcing) the wire itself, and secure it to the fixing points. I know I could make them, but as there are twelve of them (three under/three on top of each wing) I'm hoping they are a manufactured item. The bolt size through the wing is 4 mm dia.. The upper fuselage point is secured by a self-tapper (although I'll probably bolt this with 4mm nylon bolts) .

I don't even know what these fittings are called! Help!

Thanks, everyone, Den, Swansea

[Former Member]

[This posting has been removed]

[Don Fry]

Having looked at a photo of one of these, the rigging is non functional, so dressmakers cotton sheathed elastic will do for the "wire". I can't think of much commercial stuff available, except some of the fittings used for "closed loop" or "pull pull" control systems. Be easier to make your own, as a small model like that will not be happy straddled with a load of heavy units designed for load bearing in much heavier aircraft.

[Denis Watkins]

Here, at Modelfixings too Den,

**LINK**

[Peter Miller]

SOmetimes one can find proper turnbuckles on EBay and other places.

Controlline wire makes excellent rigging wire but as others have said if the model does not actaully need rigging wire shirring elastic from any haberdashers works real well and does not need tensioners

[Former Member]

[This posting has been removed]

[Den Moran]

Thanks, everyone. As the rigging is functional for this particular aircraft,, a necessary part of the wing support system, I'll go with the fishing wire et al, and use soldered crimps.

It's the brackets that are key to avoiding all that drilling and shaping. My hands aren't up to too much of that these days! Cheers, Den

[Former Member]

[This posting has been removed]

[Simon Chaddock]

If the rigging is fully functional you really do need turnbuckles to be able to accurately balance the tension as any discrepancy between the leading and trailing wire will effect the wing incidence out towards the tip, particularly as the load varies.

[Don Fry]

Sorry Den, I would never have thought a model that size would use functional rigging. An alternative to turnbuckles is a closed loop attachment (m2 thread one end, hole to attach wire/Dacron on the other), to a m2 clevis. I thin

[Former Member]

[This posting has been removed]

[Former Member]

[This posting has been removed]

[Martin Harris - Moderator]

If you use the crimped tube solution, we've found that an additional loop passed back through the crimp so that there are 3 wires in the tube means that the wires are forced into close contact and are far less likely to slip than a simple loop relying on the tube to wire point contact.

[Former Member]

[This posting has been removed]

[Den Moran]

I agree about the 'top tip'!

As the four 'v's' come to single points, I've decided just to tension using the 'Spanish cramping' method, i.e. twisting, to take up slack, as I don't want/need the wires bow tight.

As usual, a really helpful response from everybody, cheerio, Den, Swansea.

[Manish Chandrayan]

If in need of turnbuckles look up here. Available from M1.2 to M3 thread size, different lengths and with loop or slot ends

Edited By Manish Chandrayan on 22/04/2019 09:31:10

[Den Moran]

Thanks, Manish, but turnbuckles are a bit too weighty for this aircraft. I looked up the fishing supplies, and they have 'figure of eight' flat pieces, which, if I bend them slightly, will be ideal. Thanks every one, Den.