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Scratch built Pilatus B4 to 1/4 scale.

Let us all watch your new project progress.
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Peter Balcombe
Posts: 1108
Joined: 18 Mar 2015, 10:13
Location: Clevedon, North Somerset, U.K.

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by Peter Balcombe »

Well done Brian.
Looks very neat so far & you’ve even started the covering :o

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B Sharp
Posts: 728
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by B Sharp »

Thanks for the nice comments Peter.
I have now started on the sheeting and planking of the fuselage. It is pretty straight forward at the back because the fuselage is a straight forward ovoid cone shape with no compound curves. I have been able to cut the 1/8 balsa sheet to a long triangles, moisten the outer surface and glue and pin it into place. I have resorted to traditional planking going towards the top of the fuselage where the curve tightens. The front of the fuselage will all be planked to cope with the compound curves there.
If I keep going at this pace I will be keeping up with Chris Williams! (in your dreams Brian!!!)
Brian.
Attachments
Sheeting started.
Sheeting started.
Now a bit of planking up to the top.
Now a bit of planking up to the top.

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B Sharp
Posts: 728
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by B Sharp »

This afternoon I have got the sheeting and planking to the point where the fuselage is rigid enough to allow me to remove it from the jig. Thanks Robbie, once again your jig design has left me with a perfectly straight and nicely aligned fuselage structure. The fuselage is now sitting upside-down in a couple of foam cradles on the workbench ready for me to start on the underside planking.
Brian. :) :) :)
Attachments
Fuselage ready to be removed from the jig.
Fuselage ready to be removed from the jig.

Paul Neville
Posts: 2
Joined: 01 Mar 2019, 11:30
Location: Australia

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by Paul Neville »

Good luck with the rest of the build, looks great so far.
The fuse jig looks easy to make ,are there details of it anywhere?

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B Sharp
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Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by B Sharp »

Hi Paul...
Yes it's a great tool and easy to build and use. Designed by Robbie Bridson and details are available - this is where Cliff Evans can step in with the Info.
Brian :)

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Cliff Evans
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Joined: 29 Dec 2019, 15:13
Location: Bristol
Contact:

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by Cliff Evans »

Damn you Brian!! :lol: :lol: :lol: :lol: There is basic info here: viewtopic.php?t=2486

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RobbieB
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Joined: 07 Mar 2015, 22:22
Location: North West
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Re: Scratch built Pilatus B4 to 1/4 scale.

Post by RobbieB »

Just to add to Cliff's post, my original was 50 x 50 ali angle and was spaced with M8 studding. Bear in mind you will need four nuts and washers per spacer. You could use bolts but studding is probably cheaper.
IMG_0019.JPG

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chris williams
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Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by chris williams »

All the hardware for mine (minus the jig base) came from B&Q: the angle brackets were perfect for the job...
Attachments
01100002.JPG

Paul Neville
Posts: 2
Joined: 01 Mar 2019, 11:30
Location: Australia

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by Paul Neville »

Thanks for the info guys,something to keep in mind.

Paul

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B Sharp
Posts: 728
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Scratch built Pilatus B4 to 1/4 scale.

Post by B Sharp »

I have made a bit more progress in the last couple of days. The fuselage is now completely sheeted and planked except for the upper surface in front of the cockpit, This is being left open at the moment to get easy access to the whole of the cockpit area. The planking on the outside of the front of the fuselage was given a rough sand followed up by a thin layer of filler all over to close up any holes and gaps that there might be between planks. The filler I use is Ronseal multi-purpose wood filler (natural) as I find that it sets fairly hard but is easy to sand and gives a good surface finish.
I then cut out panels of 390gm/m2 glass cloth using card templates and glued them into the various bays using Bucks Composites finishing epoxy resin.
I have also added the balsa leading edge to the fin and have rough sanded it to section.
Brian. :)
Attachments
The nearly finished fuselage.
The nearly finished fuselage.
The interior of the cockpit lined with glass and epoxy.
The interior of the cockpit lined with glass and epoxy.
The fin with the leading edge in place.
The fin with the leading edge in place.

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