ORIGINAL: sclitheroe
Hi,
I'm brand new to the forums, and relatively new to RC flying. I'm currently building a semi-scale DHC-3 Otter from a kit, so I have the occasional odd question as I make progress.. I don't know very many modelers yet in my area, so I'll ask here...
Here's one - how come hinges on control surfaces get glued and pinned, but control horns are typically a two piece affair, with the horn, and a backing plate that gets bolted together? Why not use bolts on all the hinges? Do horns need it because of the greater shearing load on the control horns?
Thanks,
Scott
Hinges are inserted internall to the wood in a "layered" manner and don't require bolting because of the direction of the loading. Simple pulling for the most part.
Control horns are attached to the EXTERNAL surface and because of the type of load "angular" needs the load distribution effect of the backing plate. A couple of drops of thin CA is often also used to harden the balsa too. Drill the holes first.