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rowlandcarson(at)gmail.co
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 Posted: Thu Feb 12, 2015 1:17 pm Post subject: flap cross-tube hinge alignment query |
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Monowheel XS, building in UK.
Today I thought I’d be bonding in to the fuselage floor the FL18 hinge brackets for the FL15 flap actuator cross-tube. I have already rigged the wings with the cross-tube connecting both flaps, the FL18s secured to a straight-edge and the FL15 lugs clamped to the FL16 hinges. The whole thing seems to operate quite smoothly over the whole range when I crouch in the rear fuselage and operate it from the lug near the centre.
However, when I got to the part where I remove the hinge screws and stretch a string between the inner flap hinges on the wings to line up the holes in the FL18 brackets, I couldn’t get the line straight.
I photographed the nylon monofilament line, looking along its length, and measurements on the pictures suggest the brackets need to move forward by between 1.8mm and 2.2mm. I also tried using a laser pointer to provide similar data, shining it through the wing-mounted flap hinge hole and through a 1.5mm orifice centred on the nearer FL18 hole. This was tricky to achieve so the results may be less reliable. Calculations based on how far off-centre the beam appeared to hit the far FL18 suggest that each FL18 might need to move up to 2.7mm forward.
I have already chamfered the forward edge of both FL18 slightly to accommodate the fillet of BID where the baggage bay meets the fuselage floor, but I don’t want to remove any more metal without some sort of reassurance. I’m assuming that cutting into the BID reinforcement between the baggage bay and the fuselage floor is not desirable!
Suggestions welcome!
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
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jan_de_jong(at)casema.nl
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| Posted: Fri Feb 13, 2015 2:32 am Post subject: flap cross-tube hinge alignment query |
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Hi Rowland,
I am hardly the expert you are looking for (I'm not even quite at your
stage of build), but I would do to the bid whatever is necessary and
reinforce the slot in the bid with 3 layers of bid or so - rear surface
top, lap onto the bottom left and lap onto the bottom right.
Jan de Jong
#461
On 2/12/2015 10:16 PM, Rowland Carson wrote:
| Quote: |
Monowheel XS, building in UK.
Today I thought I’d be bonding in to the fuselage floor the FL18 hinge brackets for the FL15 flap actuator cross-tube. I have already rigged the wings with the cross-tube connecting both flaps, the FL18s secured to a straight-edge and the FL15 lugs clamped to the FL16 hinges. The whole thing seems to operate quite smoothly over the whole range when I crouch in the rear fuselage and operate it from the lug near the centre.
However, when I got to the part where I remove the hinge screws and stretch a string between the inner flap hinges on the wings to line up the holes in the FL18 brackets, I couldn’t get the line straight.
I photographed the nylon monofilament line, looking along its length, and measurements on the pictures suggest the brackets need to move forward by between 1.8mm and 2.2mm. I also tried using a laser pointer to provide similar data, shining it through the wing-mounted flap hinge hole and through a 1.5mm orifice centred on the nearer FL18 hole. This was tricky to achieve so the results may be less reliable. Calculations based on how far off-centre the beam appeared to hit the far FL18 suggest that each FL18 might need to move up to 2.7mm forward.
I have already chamfered the forward edge of both FL18 slightly to accommodate the fillet of BID where the baggage bay meets the fuselage floor, but I don’t want to remove any more metal without some sort of reassurance. I’m assuming that cutting into the BID reinforcement between the baggage bay and the fuselage floor is not desirable!
Suggestions welcome!
in friendship
Rowland
| Rowland Carson ... that's Rowland with a 'w' ...
| <rowlandcarson(at)gmail.com> http://www.rowlandcarson.org.uk
| Skype, Twitter: rowland_carson Facebook: Rowland Carson
| pictures: http://picasaweb.google.com/rowlandcarson
|
| | - The Matronics Europa-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Europa-List |
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