Nick Stock 2
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All great and interesting responses so thanks everyone. I'm gluing wood to wood for those who asked. Personally, I am set (no pun) on using an epoxy though interesting that some of you have used aliphatic etc to good effect. Noted now that (particularly) excessive use of epoxy comes with a high weight cost, but this is line I intend to straddle because of my slight paranoia of the tail snapping off under heavy load in flight. I'm going with Araldite Standard dual syringe which is repositionable for up to 2 hours and I know will set rock hard.
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I'm nearly at the point where I want to assemble the horizontal tail assembly to the fuselage. I have plenty of 20 minute cartridges from screwfix lying around but would prefer to use something more suitable. Any suggestions here? Brands? Cure time? Edited By Nick Stock 2 on 15/08/2018 12:21:03
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1:5 Spitfire Balsa Kit - Custom Control Horn Design: Length?
Nick Stock 2 replied to Nick Stock 2's topic in Warbird kits
Posted by David Ovenden on 13/08/2018 13:35:26: Just a thought. Is the elevator hinge point really where you show it in the diagram? Aren't they normally hinged at the centre of the circle that forms the radiused leading edge, rather than at the leading edge itself? If so, that would affect the geometry of your diagram. Edited By David Ovenden on 13/08/2018 13:41:05 David good point - perhaps in the actual full size the hinge point was/is some distance within the leading edge. However my Robart hinges have their hinge points effectively dead in the middle between the outer most part of the leading edge and the trailing edge of the horiz stab, perhaps at most within a few mm. So I take the view now that as long as I'm in the right ball park, I can adjust surface deflection with the position of the pushrod at the servo end (inwards or outwards) and then fine tune with my transmitter (end point). N -
1:5 Spitfire Balsa Kit - Custom Control Horn Design: Length?
Nick Stock 2 replied to Nick Stock 2's topic in Warbird kits
Thanks you both. Together with this and Tim's Seagull Model Hurricane setup, I committed to a vertical distance of 25.4mm/1" from lower surface of the elevator to the hinge point. This I hope will err on the side of 'big servo arm movement = less control surface deflection' which I understand is vital to warbird setups - particularly Spits. -
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I've been working on the tail section of this kit - planing and sanding to necessary profile. I just have some tidying to do before glassing the Horiz stab and covering the elevators before final assembly. I plan to cut my own control horns by hand from pre-cured carbon fibre sheet. Can anyone advise on my current design (pictured below) - whether long enough hence resultant pushrod travel or else? Thanks Nick Edited By Nick Stock 2 on 13/08/2018 10:30:54 Edited By Nick Stock 2 on 13/08/2018 10:43:58
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