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Great soaring conditions on the Great Orme yesterday afternoon & even better today ( Sat.). Nice to get out & use some sky !!

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Wot 4 Mk3 Kit Build

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Wot 4 Mk3 Kit Build

Post by Andyedmead on Tue Jan 23, 2018 7:21 pm

I like reading these build threads so here is one of my own.

Chris Foss Wot 4 MK3 Classic. Bought this off my friend who has moved onto full size.

Engine is ether a os40 max fp or a asp 61 fs.




Kit contents and very nice foam wings.



Leading edges glued on.


Leading edges and trailing edges glued on. Ready for sanding.
Instructions crossed out so I don't screw the options up, which for me is 2 aileron servos.




Wing tips glued on ready for shaping, I cheated and used epoxy.
Wing  tip profiles dry built ready for glue.



Wing tips shaped and finished and I used some 1/2 stock balsa instead of the suggested 1/8  triangle scraps.
Le and te now shaped to wing profile.

Wing joined and some cable left in for pulling the servo extensions through.
Next job on wing is to square off the leading edge but can't do that until fus is done.


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Re: Wot 4 Mk3 Kit Build

Post by Mark Barnes on Tue Jan 23, 2018 7:49 pm

Awesome glad your doing a thread, a proper wot 4 too.

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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Tue Jan 23, 2018 11:44 pm

After another evening in the garage and not so fast progress I asked myself why didn't I buy an ARTF.
And I very nearly F***** up.

I had to make my mind up about the engine, have gone for the Asp 61 fs.

Anyway have managed two identical fuselage sides, pics to follow.


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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Fri Feb 02, 2018 8:46 pm

Left and right sides made and weighted down to keep straight not identical sides as I said before.

Sides complete with ply and longerons.

1 " Spacer to set back bulkhead for bigger engine. You can always add some sort of spacer later but you can't change the bulkhead position once it's built so best to set it back. One advantage over the ARTF version I suppose.

Very important job now setting the Bulkhead hopefully nice and straight and 90 degrees.

Same for Former 2 ensure its nice and square
Now time to join the other  side, still laid flat and weights added to keep it in postion after checking formers are still square.


All the time whist building the fus keep checking that its not twisted.




Note Velco strap to hold side together before glue.


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Re: Wot 4 Mk3 Kit Build

Post by Mark Barnes on Sat Feb 03, 2018 9:18 am

looking well Andy

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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Wed Feb 07, 2018 3:25 pm

Fiber glass Join on wing, may have used a little too much hardener but did come out strong.

Cut out for servo.

Covered wing in solar film, not 100% happy with my covering skills, a few wrinkles but at least I can say I built it myself. Still have to shape the control surfaces for the wing then hinge etc.

Had a good tip off Mike S to use some masking tape to cover the fiber joins before covering, worked well and it hides the joins.


Fus can be finished now, getting  there slowly.

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Re: Wot 4 Mk3 Kit Build

Post by Mark Barnes on Wed Feb 07, 2018 4:37 pm

good job, solar film wrinkles can be removed with carfull use of a heat gun.

I really should get on with my builds

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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Fri Feb 23, 2018 10:53 am

Starting to look like an aircraft now.
Time to align the wing and drill the holes for the dowels and captive nuts after checking measurements.

Added some square hardwood behind the main bulkhead to give it strength.

In the build instructions it tells you to drill for the captive nuts and glue them in. I have put them in behind the fixing plate so they can't come out. I have also glued in the captive nuts for the under carriage.


Next job is to make an Isopon fairing for the wing and to shape the fus.



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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Thu Mar 08, 2018 10:36 pm

So finally managed to get back to my build.
Just got to Cover it and install engine servos etc, next post hopefully show the finished thing.

Glue the horizontal tail stabilizer together.


Dry fit the Vertical stabilizer



Sand the rudder and elevators to shape.

Fit the Tail and check all measurements.


Started to build a fairing out of Isopon.


Sanding the fairing into shape.


Fairing starting to take shape now


Almost finished fairing.



Hopefully I've done a good job and it's all straight  Fingers crossed, I'm certainly no master builder!

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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Sun Mar 25, 2018 3:57 pm

Slowly making progress now.

Engine Installed

8 oz Fuel Tank ready to be installed.

Tank Tidy / Filler Installed.

Servos installed

Spinner Installed.

Almost Done now.



Ran the engine up today Started almost straight away once I found the right plug for it.
Just have to install the aileron control rod have a tidy up add the stickers then fly it.

Hopefully next photo will be of it flying.

Andy

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Re: Wot 4 Mk3 Kit Build

Post by Gary M Jones on Mon Mar 26, 2018 8:49 am

What size / make is the 4-stroke?
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Re: Wot 4 Mk3 Kit Build

Post by Andyedmead on Mon Mar 26, 2018 9:14 am

Gary, it is an ASP AR 61.


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Re: Wot 4 Mk3 Kit Build

Post by Mark Barnes on Mon Mar 26, 2018 10:47 am

Nice work Andy

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Re: Wot 4 Mk3 Kit Build

Post by Allan Patrick on Mon Mar 26, 2018 1:53 pm

Well done! Hope to see it flying soon...

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