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Concorde Speedbird03/02/2018 21:52:01
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2688 forum posts
559 photos

Not much progress today thanks to the rugby!

I put in the glow extension permanently. I will need to extend the earth wire though. Seen with the driver on as it will be in use.

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I made a mount for the fuel tank and put a thin layer of varnish in the tank bay, in case of any inadvertent fuel leaks.

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And the sides of the deck, to be sanded.

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Concorde Speedbird04/02/2018 14:42:52
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2688 forum posts
559 photos

I decided to put the fuel tank in since there is no further reason to remove it. I assembled, leak tested it and installed it (it can be removed/reinstalled through the fuselage if required).

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Then the skin:

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It is quite a subtle curve, which I quite like.

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Left to set whilst I watch the Rugby, then I will sand the corners and start work on the last two decks beneath the wing and fuselage.

Concorde Speedbird05/02/2018 19:29:20
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2688 forum posts
559 photos

I started on the front under fuselage. The undercarriage is now finally fitted, and I am being ambitious and building over it. If needs be it will be easy to cut through the deck to remove the undercarriage.

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This is the area on the plan

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More to come

Concorde Speedbird05/02/2018 21:05:31
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2688 forum posts
559 photos

Next former

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And the next one

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As shown on the plan (see previous post) a curve is formed:

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Some nice light 1/16" is used to form the double curve. I decided to let this half set properly before attempting the second half tomorrow.

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Once this is done, the section beneath the wing can be built.

On track to be covering this weekend!

Tom Thomas05/02/2018 23:54:48
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285 forum posts
205 photos

Such a tidy and interesting build yes

Concorde Speedbird06/02/2018 20:00:07
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2688 forum posts
559 photos

Thank you very much Tom!

Firstly the tailplane/fin blocks

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Then the other half of the underside skin.

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Just the cowl, canopy area, rudder and elevators needed now.

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Concorde Speedbird07/02/2018 22:02:21
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2688 forum posts
559 photos

Only one picture today. The under fuselage section underneath the wing is quite a complicated part, so I am taking it slowly. Should get it done tomorrow.

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Concorde Speedbird08/02/2018 18:49:07
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2688 forum posts
559 photos

Some more pre-dinner work

I attached the aft former. Cleverly, I didn't cut the curve making it much more difficult and precarious to match the shape...

200.jpg

That's picture 200 by the way (there are fewer in the album because I haven't uploaded some).

I then shaped it, which wasn't too bad.

201.jpg

Very much full span ailerons! The red stains are blood (don't worry it wasn't a bad cut).

More this evening if I can be bothered (got a stupid cold).

Jacob

Concorde Speedbird08/02/2018 20:51:47
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2688 forum posts
559 photos

Sides sanded and central support added.

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Central former added (1/16 for lightness).

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And the last bit of fuselage sheeting... on the wing.

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Concorde Speedbird12/02/2018 21:57:10
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2688 forum posts
559 photos

Elevators, pretty simple. Not tapered or anything fancy, mainly because it is easier to keep them straight.

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Two extra bits for hinge material:

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Top skins:

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Here is the wing centre section by the way:

208.jpg

Rudder, balance tabs on elevators, cockpit area, cowl and a good sand before covering. Weekend was written off by a cold unfortunately.

Concorde Speedbird13/02/2018 21:22:45
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2688 forum posts
559 photos

Elevator work:

209.jpg

And hinged- still awaiting balance tabs. Moved onto some Mustang work, but more on this tomorrow.

210.jpg

Concorde Speedbird14/02/2018 22:48:05
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2688 forum posts
559 photos

Late night building session!

Elevator balance tabs and piano wire connector. The tabs look a bit thin on their own, but look fine on the tailplane and this is how the Giles has it. I'm also going to strengthen the join to the elevators.

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Rudder build: Sheet 1

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Frame:

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Horn material:

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And sheet 2:

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Balance tab to be added. Might mass balance these controls too as they are quite large.

Concorde Speedbird16/02/2018 17:51:44
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2688 forum posts
559 photos

Rudder done, decided to take some pictures

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Paul C.16/02/2018 18:15:31
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348 forum posts
104 photos

Looking great CS 👍I like the colour coded fuel lines saves a lot of grief later in the build 😀. Are you doing a built up cowl or do you have something else in mind .

Paul

Concorde Speedbird18/02/2018 19:37:17
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2688 forum posts
559 photos

Thank you, simple built up cowl sanded to shape, but it will be removable.

Slow but consistent progress. Elevator joiner from piano wire and a small piece of balsa as a form of fairing.

221.jpg

Strengthening cocktail sticks that I found at a bar. These help hold the balance tabs on (inside would be better but they are sufficiently strong now).

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I like to attach the tail wheel to the rudder with a rubber band, so any shock loads don't either break the rudder or overload the servo. This needs to be cut down, but here is the hook:

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And a notch to allow the tail wheel to rotate independently of the rudder when the rubber band is stretched.

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Finally, I glued and partially shaped the cockpit sides. These need some precise filing and sanding so the canopy fits well- once they are stuck.

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I also did a lot of sanding. I will try to get the cockpit sides done tomorrow, then I will do the cowl, some other bits and pieces and covering can occur.

Biggles' Elder Brother - Moderator18/02/2018 23:18:54
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Moderator
14891 forum posts
1310 photos

Really taking shape now, nice work. And I see you have bled on it - always a guarentee of sucess that! I have bled at one time or another on all my most sucessful builds! smile

BEB

Concorde Speedbird19/02/2018 22:57:27
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2688 forum posts
559 photos

Thank you very much BEB. Yes, it inevitably seems to occur at some point and I have bled on all my aeroplanes so far, must help in some way!

Good evening all, just some shaping and an additional lip over the 'instrument panel'. Note the slots for the canopy.

226.jpg

The canopy sits well considering I found it in the corner of a model shop, but not perfectly. It will be fine to glue on though with a bit of bending (and tape to hold it), once I have covered the fuselage and painted the cockpit area.

227.jpg

Just the cowl to go and a final sand before covering!

cymaz20/02/2018 06:47:34
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7330 forum posts
964 photos

Interesting well done. I you thought about how it might fly? Short moment arm ,large fin and elevator. Keep that in mind when setting up the throws and for the maiden. Good luck

Concorde Speedbird20/02/2018 22:34:50
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2688 forum posts
559 photos
Posted by cymaz on 20/02/2018 06:47:34:

Interesting well done. I you thought about how it might fly? Short moment arm ,large fin and elevator. Keep that in mind when setting up the throws and for the maiden. Good luck

High manoeuvrability! Thank you very much. I've thought a lot about it and with the Taranis I have a lot of flexibility with multiple control rates and exponential, so I can set it up with small throws initially and work from there. The aim was to have something which can do impressive tumbling manoeuvres etc. rather than a precision aerobat, hence the design choices.

Some cowl work, first the engine on:

228.jpg

Then the cowl mounting blocks with screw holes in. Not asymmetry of the blocks because the cooling air exit hole is to be directly behind the engine for effective cooling.

229.jpg This is to make the spinner gap, and my idea for holding it in place with pins:

230.jpg

Then I realised I had forgotten the cowl front! This will be shaped and the cooling holes similar to a full size aeroplane cut (although I might blank the non-engine side one).

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First piece, note hole for mixture control needle:

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And glued onto the front, screwed to the mounting block (it will have a thin ply plate for the screwhead to sit on).

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So I need to work around to build up the rest of the cowl and then a huge amount of shaping.

cymaz21/02/2018 06:23:08
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7330 forum posts
964 photos

Now would be a good time to design the cooling baffles. Easy to build a tunnel right onto the engine fins. Can’t wait to see the results.

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