Primeval Tecnology can usurp tecno marvels , at times . Double Upholsterers Thread . ( H.D. Cotton Thread , care to snap or cuts you ) .
Scissors are better , actually .
![Layingdown LL~](https://stunthanger.com/smf/Smileys/classic/side_laugh.gif)
but tough blokes Can Snap It .
![Grin ;D](https://stunthanger.com/smf/Smileys/classic/grin.gif)
![](https://stunthanger.com/smf/index.php?action=dlattach;topic=43319.0;attach=251474;image)
Reasons , STRUCTURALLY , well done , the two surfaces are One , integrally .
Thus Defected , the resistance to bow under load , is considerable.
Aerodynamically , the slightly raised ' V ' s are comparable to Vortex Generators , for flow attachmen / adheshion .
Geometrically , The ROLLING Hinge Motion ( Square Tailplane Rear Face ( maybe the edges radiused ) , Round Elevator L. E. )
gives a varying effective Horn ( control Arm ) Length .
Both , the rolling ( vertically ) hinge effectively lifts the control surface , compared to pins , progresively through the travel .
Thus if replaced by Conventional Nylon Hinges , More Throw is Required for same effective deflection ! .
Wrenching apart a tailplane with Nylon Hinges is Difficult , wit Sewn Hinges , nearer to Impossable ;
for a comparison of structural integredy .