1/5th OV 10 Bronco

[Dave Parry]

Looking really good Chris, would love the full story for the Journal if you ever fancy having ago. My contact is at the bottom of my posts and in the Journal.

Good luck with the rest of the build.

Dave (LMA Journal Editor)

Be happy to write something up once it's all finished and we can get the important flying photos.

Great, will look forward to it.

[Chris Bradbury]

I've started adding a few more components that are easiest added at this stage of the build, which in this case is the lighting.

The OV10 has a single beacon light on the top of the horizontal stab, so this has been fitted. Sequence wise I've programmed this with a UniLight 8 channel controller.

The UniLight controller

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The tail beacon light recessed in to the skin of the rear stabiliser.

[Chris Bradbury]

A little bit off work done on the centre main wing section tonight.

I've added a 3mm ply reinforcement under the skin of the wing where the bolts will go through to mount to the centre fuselage.

Gluing in place

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View from above

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View from inside the wing. This will have a solid balsa fill as well.

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Top wing skin applied.

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Flaps started, which now need the leading edge attaching.

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[Chris Bradbury]

Focussed on the centre wing section today.

Flap leading edge shaped.jpg (204.34 KiB) Viewed 12038 times

Rough cutting leading edges to flaps.jpg (245.07 KiB) Viewed 12038 times

Flap ready for install.jpg (202.56 KiB) Viewed 12038 times

I added some balsa block in the centre of the wing where the bolts will go through, just to help prevent any accidental over tightening causing damage during use.

Gluing support blocks in place.jpg (250.75 KiB) Viewed 12038 times

The phrase measure twice cut once is something I live by, which is good, as I was amazed to take not two, but three goes at calculating the position for the wing securing bolts. Must be the end of a long week...

Measure twice cut once.jpg (217.21 KiB) Viewed 12038 times

[Chris Bradbury]

I glued the servo mounts in place before skinning the lower side of the wing.

Gluing servo supports in.jpg (236.23 KiB) Viewed 12037 times

Servo bay ready to be covered.jpg (228.15 KiB) Viewed 12037 times

Skinning the centre wing panel.

Lower wing skin sheets glued together.jpg (203.92 KiB) Viewed 12037 times

Gluing the lower wing skin on.jpg (224.57 KiB) Viewed 12037 times

[Chris Bradbury]

With the wing skinned, I cut out some of the holes I need for servos and wiring. The centre hole is to allow wiring down in to the fuselage.

I also made a couple of tools for doing a couple of particular jobs, as it would seem I need to check Permagrit to add some more useful items to my list. In particular I made a small saw for cutting the servo bays neatly, which is a hacksaw blade with the pins knocked out and a small balsa handle added, which works really well for the job.

A couple of tools made for specific jobs.jpg (210.64 KiB) Viewed 12036 times

Servo hole cut.jpg (198.11 KiB) Viewed 12036 times

Bottom of the skinned wing.jpg (161.95 KiB) Viewed 12036 times

Bottom of the skinned wing with servo mounts in place.jpg (159.67 KiB) Viewed 12036 times

Centre hole in wing for wiring to access the fuselage.jpg (199.79 KiB) Viewed 12036 times

[Chris Bradbury]

I'm using live hinges for all control surfaces, based on 3mm carbon rods.

Flap in max down position.jpg (213.4 KiB) Viewed 12036 times

Flaps fown.jpg (195.27 KiB) Viewed 12036 times

Flap hinges with small reinforced aluminium rings.jpg (206.88 KiB) Viewed 12036 times

Lower side of the wing showing the gap for flap operation.jpg (201.15 KiB) Viewed 12036 times

Lower of centre wing piece.jpg (166.08 KiB) Viewed 12036 times

Test fitting for leading edge.jpg (242.91 KiB) Viewed 12036 times

Checking flap movement clears the fuselage.jpg (216.59 KiB) Viewed 12036 times

Flap in max up position.jpg (189.05 KiB) Viewed 12036 times

[Chris Bradbury]

The next small job was to add and shape a leading edge and finish the fit of the centre wing piece to the fuselage.

Leading edge fitted and rounded.jpg (173.34 KiB) Viewed 12036 times

Cebtre wing piece in place.jpg (188.85 KiB) Viewed 12036 times

Centre wing is a good fit.jpg (199.61 KiB) Viewed 12036 times

Centre wing piece almost ready for glassing.jpg (137.46 KiB) Viewed 12036 times

Servo plate in place.jpg (157.25 KiB) Viewed 12036 times

A third of the barn door in place.jpg (159.92 KiB) Viewed 12036 times

[Chris Bradbury]

The last job today was to start adding the form shape for the rear of the wing, that will eventually form in to the shape of the rear of the main fuselage.

Blocking out for the back of the wing.jpg (188.22 KiB) Viewed 12036 times

Rear wing lump rough formed.jpg (205.07 KiB) Viewed 12036 times

[Chris Bradbury]

This evening I added the control surfaces and servo mounts to the outer removable wing pieces, which will now need a little sanding off to finish.

Gluing servo mounts.jpg (511.94 KiB) Viewed 11970 times

More servo mouning points.JPG (525.31 KiB) Viewed 11970 times

Hinge detail.JPG (476.93 KiB) Viewed 11970 times

Hinge close up.JPG (398.31 KiB) Viewed 11970 times

Flap internal.jpg (524.27 KiB) Viewed 11970 times

Left wing ready for trimming.JPG (515.34 KiB) Viewed 11970 times

Shavings.jpg (633.96 KiB) Viewed 11970 times

[Chris Bradbury]

There is loads of control throw available.

Loads of throw.JPG (338.19 KiB) Viewed 11970 times

Nice and straight.JPG (372.45 KiB) Viewed 11970 times

Right wing end.JPG (417.19 KiB) Viewed 11970 times

[Chris Bradbury]

Finishing the main wings today.

Lining flaps up to match size.JPG (352.2 KiB) Viewed 11933 times

Unilight on right wing.JPG (628 KiB) Viewed 11933 times

Unilight and mounting slot.JPG (327.11 KiB) Viewed 11933 times

Running wires through the wing frame.JPG (476.67 KiB) Viewed 11933 times

A little sanding to finish.JPG (341.84 KiB) Viewed 11933 times

Main wing nearing completion.JPG (330.07 KiB) Viewed 11933 times

A giant barn door.JPG (291.19 KiB) Viewed 11933 times

Weighing components.JPG (415.01 KiB) Viewed 11933 times

Quick assemble.JPG (434.19 KiB) Viewed 11933 times

Getting a sense of size.JPG (459.23 KiB) Viewed 11933 times

[Chris Bradbury]

Current weight for everything in the image is a little under 8kg, so I'm still hoping to get this in under 20kg.

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[Chris Bradbury]

Due to health problems I will no longer be able to finish this model. So this is now for sale in the condition you see it in from the latest photos.

This is the wooden frame only, but I can also sell some glass cloth if anyone wants that as well to finish the project.

Looking for £350 ono.

Located in Telford, Shropshire, but can take it to the BMFA National Centre, or Weston Park / Cosford over the next month or so.

[Joshua Henderson]

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