The biggest problem at this stage lies in the springiness of the spruce longerons, so it's essential to steam out as much of it as you can at this time...
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SLINGSBY GULL 3: 1:3.25 scale
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chris williams
- Posts: 1573
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Re: SLINGSBY GULL 3: 1:3.25 scale
Maybe by Xmas, Mike...
The biggest problem at this stage lies in the springiness of the spruce longerons, so it's essential to steam out as much of it as you can at this time...
The biggest problem at this stage lies in the springiness of the spruce longerons, so it's essential to steam out as much of it as you can at this time...
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Barry_Cole
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Martynk
- Posts: 61
- Joined: 23 Mar 2017, 21:23
- Location: Willaston
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Re: SLINGSBY GULL 3: 1:3.25 scale
Does that mean you are steaming a bow into it or does steaming really remove the springiness Chris?chris williams wrote: ↑06 Oct 2017, 15:36 Maybe by Xmas, Mike...
The biggest problem at this stage lies in the springiness of the spruce longerons, so it's essential to steam out as much of it as you can at this time...
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chris williams
- Posts: 1573
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Re: SLINGSBY GULL 3: 1:3.25 scale
No, you need to wet up the spruce and insert it into a jet of steam whilst holding in a tad more than the required bend... In this,and most cases, the bend needs to be in two different directions...!
Meanwhile, with enough 1.5mm ply planking at the front end to hold the shape, the half shell can be removed from the board.
Meanwhile, with enough 1.5mm ply planking at the front end to hold the shape, the half shell can be removed from the board.
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chris williams
- Posts: 1573
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Re: SLINGSBY GULL 3: 1:3.25 scale
Having made up the port side, it's now time to make up, er...the other side
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Martynk
- Posts: 61
- Joined: 23 Mar 2017, 21:23
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Re: SLINGSBY GULL 3: 1:3.25 scale
Ah, I see why you have to remove the springiness now.. I must be thick, it didn't click originally.
Very neat
Very neat
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Mike F
- Posts: 114
- Joined: 18 Mar 2015, 14:08
- Location: Gloucestershire
Re: SLINGSBY GULL 3: 1:3.25 scale
Chris
Regarding the interface between the 1.5mm ply and the lighter ply in the rear fuselage, how do you keep the two different thicknesses flush on the outer surface?
Thanks
Mike
Regarding the interface between the 1.5mm ply and the lighter ply in the rear fuselage, how do you keep the two different thicknesses flush on the outer surface?
Thanks
Mike
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chris williams
- Posts: 1573
- Joined: 10 Mar 2015, 10:50
- Location: Blandford Dorset
Re: SLINGSBY GULL 3: 1:3.25 scale
Mike, it will take a good skim of filler to smooth out the planking, and it's simple to extend it over the join...
A quick word about planking with 1.5mm ply. You don't need to utilise individual planks: larger planks are cut and scored with two lines to form three planks. The wood is then bent along the score lines to form a curve that will better conform to the shape of the fuselage. The super-plank is then trimmed, cut to size, and glued in place with PVA. It's also worth pointing out that the fit of the planking does not need to be perfect, because as well as being skimmed on the outside, it will also be glassed on the inside...
Now the rear of the fuselage has been braced with 6mm balsa strip to keep it straight when the 0.8mm ply sheeting is fitted later on in the process...
A quick word about planking with 1.5mm ply. You don't need to utilise individual planks: larger planks are cut and scored with two lines to form three planks. The wood is then bent along the score lines to form a curve that will better conform to the shape of the fuselage. The super-plank is then trimmed, cut to size, and glued in place with PVA. It's also worth pointing out that the fit of the planking does not need to be perfect, because as well as being skimmed on the outside, it will also be glassed on the inside...
Now the rear of the fuselage has been braced with 6mm balsa strip to keep it straight when the 0.8mm ply sheeting is fitted later on in the process...
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