1/5th OV 10 Bronco

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Dave Parry
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Re: 1/5th OV 10 Bronco

Postby Dave Parry » October 17th, 2018, 8:17 am

Chris Bradbury wrote:
Dave Parry wrote: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.

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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 25th, 2018, 9:01 pm

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.

IMG_4615.jpg
The UniLight controller
IMG_4615.jpg (519.05 KiB) Viewed 10785 times


56218764345__DEEBC8D9-88D3-4A65-B7B2-D26FB5A2BE94.JPG
56218764345__DEEBC8D9-88D3-4A65-B7B2-D26FB5A2BE94.JPG (280.89 KiB) Viewed 10785 times


56218749765__753F5D1C-0E73-4254-A65A-A642FA5EDFFA.JPG
56218749765__753F5D1C-0E73-4254-A65A-A642FA5EDFFA.JPG (311.74 KiB) Viewed 10785 times


The tail beacon light recessed in to the skin of the rear stabiliser.
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 26th, 2018, 10:57 pm

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.

IMG_4625.jpg
Gluing in place
IMG_4625.jpg (423.71 KiB) Viewed 10743 times


IMG_4626.jpg
View from above
IMG_4626.jpg (424.54 KiB) Viewed 10743 times


IMG_4641.jpg
View from inside the wing. This will have a solid balsa fill as well.
IMG_4641.jpg (404.01 KiB) Viewed 10743 times


IMG_4634.jpg
Top wing skin applied.
IMG_4634.jpg (252.33 KiB) Viewed 10743 times


IMG_4636.jpg
Flaps started, which now need the leading edge attaching.
IMG_4636.jpg (289 KiB) Viewed 10743 times
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 12:54 am

Focussed on the centre wing section today.

Flap leading edge shaped.jpg
Flap leading edge shaped.jpg (204.34 KiB) Viewed 10695 times


Rough cutting leading edges to flaps.jpg
Rough cutting leading edges to flaps.jpg (245.07 KiB) Viewed 10695 times


Flap ready for install.jpg
Flap ready for install.jpg (202.56 KiB) Viewed 10695 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
Gluing support blocks in place.jpg (250.75 KiB) Viewed 10695 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
Measure twice cut once.jpg (217.21 KiB) Viewed 10695 times
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 12:59 am

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

Gluing servo supports in.jpg
Gluing servo supports in.jpg (236.23 KiB) Viewed 10694 times


Servo bay ready to be covered.jpg
Servo bay ready to be covered.jpg (228.15 KiB) Viewed 10694 times


Skinning the centre wing panel.

Lower wing skin sheets glued together.jpg
Lower wing skin sheets glued together.jpg (203.92 KiB) Viewed 10694 times


Gluing the lower wing skin on.jpg
Gluing the lower wing skin on.jpg (224.57 KiB) Viewed 10694 times
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 1:09 am

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
A couple of tools made for specific jobs.jpg (210.64 KiB) Viewed 10693 times


Servo hole cut.jpg
Servo hole cut.jpg (198.11 KiB) Viewed 10693 times


Bottom of the skinned wing.jpg
Bottom of the skinned wing.jpg (161.95 KiB) Viewed 10693 times


Bottom of the skinned wing with servo mounts in place.jpg
Bottom of the skinned wing with servo mounts in place.jpg (159.67 KiB) Viewed 10693 times


Centre hole in wing for wiring to access the fuselage.jpg
Centre hole in wing for wiring to access the fuselage.jpg (199.79 KiB) Viewed 10693 times
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 1:14 am

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

Flap in max down position.jpg
Flap in max down position.jpg (213.4 KiB) Viewed 10693 times


Flaps fown.jpg
Flaps fown.jpg (195.27 KiB) Viewed 10693 times


Flap hinges with small reinforced aluminium rings.jpg
Flap hinges with small reinforced aluminium rings.jpg (206.88 KiB) Viewed 10693 times


Lower side of the wing showing the gap for flap operation.jpg
Lower side of the wing showing the gap for flap operation.jpg (201.15 KiB) Viewed 10693 times


Lower of centre wing piece.jpg
Lower of centre wing piece.jpg (166.08 KiB) Viewed 10693 times


Test fitting for leading edge.jpg
Test fitting for leading edge.jpg (242.91 KiB) Viewed 10693 times


Checking flap movement clears the fuselage.jpg
Checking flap movement clears the fuselage.jpg (216.59 KiB) Viewed 10693 times


Flap in max up position.jpg
Flap in max up position.jpg (189.05 KiB) Viewed 10693 times
Altitude Aerial Photography Ltd
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 1:21 am

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
Leading edge fitted and rounded.jpg (173.34 KiB) Viewed 10693 times


Cebtre wing piece in place.jpg
Cebtre wing piece in place.jpg (188.85 KiB) Viewed 10693 times


Centre wing is a good fit.jpg
Centre wing is a good fit.jpg (199.61 KiB) Viewed 10693 times


Centre wing piece almost ready for glassing.jpg
Centre wing piece almost ready for glassing.jpg (137.46 KiB) Viewed 10693 times


Servo plate in place.jpg
Servo plate in place.jpg (157.25 KiB) Viewed 10693 times


A third of the barn door in place.jpg
A third of the barn door in place.jpg (159.92 KiB) Viewed 10693 times
Altitude Aerial Photography Ltd
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 29th, 2018, 1:22 am

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
Blocking out for the back of the wing.jpg (188.22 KiB) Viewed 10693 times


Rear wing lump rough formed.jpg
Rear wing lump rough formed.jpg (205.07 KiB) Viewed 10693 times
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 31st, 2018, 12:41 am

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
Gluing servo mounts.jpg (511.94 KiB) Viewed 10627 times


More servo mouning points.JPG
More servo mouning points.JPG (525.31 KiB) Viewed 10627 times


Hinge detail.JPG
Hinge detail.JPG (476.93 KiB) Viewed 10627 times


Hinge close up.JPG
Hinge close up.JPG (398.31 KiB) Viewed 10627 times


Flap internal.jpg
Flap internal.jpg (524.27 KiB) Viewed 10627 times


Left wing ready for trimming.JPG
Left wing ready for trimming.JPG (515.34 KiB) Viewed 10627 times


Shavings.jpg
Shavings.jpg (633.96 KiB) Viewed 10627 times
Attachments
Centre and left wing piece.JPG
Centre and left wing piece.JPG (268.42 KiB) Viewed 10627 times
Full wing.JPG
Full wing.JPG (386.41 KiB) Viewed 10627 times
Aileron up, flap down.JPG
Aileron up, flap down.JPG (322.1 KiB) Viewed 10627 times
Altitude Aerial Photography Ltd
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » October 31st, 2018, 12:42 am

There is loads of control throw available.

Loads of throw.JPG
Loads of throw.JPG (338.19 KiB) Viewed 10627 times


Nice and straight.JPG
Nice and straight.JPG (372.45 KiB) Viewed 10627 times


Right wing end.JPG
Right wing end.JPG (417.19 KiB) Viewed 10627 times
Altitude Aerial Photography Ltd
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http://www.altitudephotography.co.uk

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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » November 1st, 2018, 11:28 pm

Finishing the main wings today.

Lining flaps up to match size.JPG
Lining flaps up to match size.JPG (352.2 KiB) Viewed 10590 times


Unilight on right wing.JPG
Unilight on right wing.JPG (628 KiB) Viewed 10590 times


Unilight and mounting slot.JPG
Unilight and mounting slot.JPG (327.11 KiB) Viewed 10590 times


Running wires through the wing frame.JPG
Running wires through the wing frame.JPG (476.67 KiB) Viewed 10590 times


A little sanding to finish.JPG
A little sanding to finish.JPG (341.84 KiB) Viewed 10590 times


Main wing nearing completion.JPG
Main wing nearing completion.JPG (330.07 KiB) Viewed 10590 times


A giant barn door.JPG
A giant barn door.JPG (291.19 KiB) Viewed 10590 times


Weighing components.JPG
Weighing components.JPG (415.01 KiB) Viewed 10590 times


Quick assemble.JPG
Quick assemble.JPG (434.19 KiB) Viewed 10590 times


Getting a sense of size.JPG
Getting a sense of size.JPG (459.23 KiB) Viewed 10590 times
Altitude Aerial Photography Ltd
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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » November 1st, 2018, 11:30 pm

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

Quick assemble.JPG
Quick assemble.JPG (434.19 KiB) Viewed 10590 times
Altitude Aerial Photography Ltd
Aerial Filming and Survey Specialists
http://www.altitudephotography.co.uk

BMFA Examiner
B(FW) - E(FW) - B(H) - E(H) - B(SF-S) - B(MR) - E(MR)

May all your landings be intentional

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Chris Bradbury
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Re: 1/5th OV 10 Bronco

Postby Chris Bradbury » June 6th, 2022, 5:00 pm

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.
Altitude Aerial Photography Ltd
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http://www.altitudephotography.co.uk

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Joshua Henderson
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Re: 1/5th OV 10 Bronco

Postby Joshua Henderson » June 8th, 2022, 7:10 pm

Message sent


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