MU13 Charlesworth

Let us all watch your new project progress.
Geoff Pearce
Posts: 376
Joined: 18 Mar 2015, 09:11
Location: SN11 9EE

Re: MU13 Charlesworth

Post by Geoff Pearce » 05 Mar 2018, 20:43

John Vella wrote:
05 Mar 2018, 18:02
Hey Geoff steady on I think at 71 I am just getting into my stride as far as balsa bashing goes. It is most enjoyable when it is freezing outside to balsa bash in a really warm model room. It is also sound proof so I can't be disturbed by the "boss".😁😁
Hi John, I know what you mean, I'm also 71........The comment was meant for Roo....

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 05 Mar 2018, 21:33

Andy A wrote:
05 Mar 2018, 20:40
Looking Good Any ideas on colour and finnish yet?
Andy at the rate I build the decision of the colour scheme is some way off. What scheme is your MU13 ? Have you any photos ? Regards John.

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 07 Mar 2018, 08:54

Andy thanks for the photo. I really like your Horton flying wing as well. Regards John.

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 11 Mar 2018, 18:42

Fuselage build nearly done. One tricky bit was the repositioning of the diagonal uprights to accommodate the curve of the side stringers between F6 and F7. The side stringers were 4 by 6mm pine from Wicks some 5ft long. The spreaders were 6 by 3mm hard wood slotted into the diagonals. All joints have 0.4mm ply fillet reinforcements. Wing centre box work and sheeting to follow next to complete the fuselage.
Attachments
20180311_124140.jpg
The diagonal upper joint moved in board.
20180311_124730.jpg
All 0.4 ply fillets fitted with thick cyano glue.
20180311_125009.jpg
More construction detail.
20180311_125153.jpg
Curve of side stringer running to nose.
20180311_125521.jpg
Underneath detail of structure.

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 20 Mar 2018, 17:10

Here is the wing centre box work on the MU13. Ply doublers used on the flat plate joining boxes. The main joiner is 15mm by 2mm steel, and the wing incidence joiner being 10mm by 1mm steel. I have fitted a ply cross brace at the back of F5 to reinforce the corner joint and act as a base for the front of the 5mm top balsa sheeting. The centre sheeting will be covered by 0.4 ply skin to blend in with the wing skin covering when the wings are built. It is a slow but enjoyable build so far.
Attachments
20180319_105427.jpg
Ply doubler and F5 front cross brace.
20180320_162544.jpg
Centre section 5mm balsa sheeting in place.
20180319_105558.jpg
View with brass centre box fitted.
20180311_124140.jpg
View of incidence box,10by 1mm , with doublers.

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Chris Jesshope
Posts: 36
Joined: 24 Jan 2017, 16:13
Location: Shropshire

Re: MU13 Charlesworth

Post by Chris Jesshope » 20 Mar 2018, 17:46

Looking forward to seeing this up on the Mynd, John.

You posting from Australia?

Anthony
Posts: 89
Joined: 18 Mar 2015, 21:39

Re: MU13 Charlesworth

Post by Anthony » 20 Mar 2018, 21:34

Hi John, where are you sourcing the canopy from. :!:

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Cliff Evans
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Joined: 13 Mar 2015, 10:32
Location: Bristol
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Re: MU13 Charlesworth

Post by Cliff Evans » 20 Mar 2018, 22:03

Canopy is made from sheet material!
Screenshot 2018-03-20 22.02.15.png

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 20 Mar 2018, 23:18

As Cliff says the canopy is built up from sheet material and a metal frame. The 4th photo should be the rear view of the incidence flat plate box and ply doublers.
20180320_161840.jpg
Rear view of incidence flat plate brass box.

John Vella
Posts: 110
Joined: 20 Mar 2017, 22:09
Location: UK

Re: MU13 Charlesworth

Post by John Vella » 02 Apr 2018, 15:23

After a break the build continues with the Empennage , another clever light weight Charlesworth design. The ribs on the tail needed a bit of work. The ply doubler is capped by 1.5mm sq spruce and the same is used to support the rear shroud. The lightening cutouts were filled with 1.5mm soft balsa to support the ribs and seal the tailplane against the elements, the weight being negligible. Now it's ready for 0.4mm ply sheeting and LE capping.
Attachments
20180402_104336.jpg
Tips balsa ply balsa sandwich
20180402_104213.jpg
Carbon spacer for 4m bolt mounting fitted.
20180323_171330.jpg
Front view with doubler and spruce strips
20180323_173110.jpg
Rear view and ribs

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