John Slater Airspeed Tern

Let us all watch your new project progress.
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Barry Apostolou
Posts: 37
Joined: 07 Jun 2019, 15:36
Location: Surrey

Re: John Slater Airspeed Tern

Post by Barry Apostolou » 21 Nov 2019, 17:19

Ah OK then,

Perhaps I am not the slowest builder in the UK. When I talk to other guys they seems to be able to produce such superb models in a short time. I guess it is how much time you are able to devote to a project before 'real life kicks in and drags you away.

Also unless I am sure of the way forward I tend to mull over the next stages, who knows perhaps I over think these things. The important thing is that we all enjoy what we do.

All the best

Barry :P

Adam C
Posts: 8
Joined: 26 Oct 2017, 14:36
Location: Southampton

Re: John Slater Airspeed Tern

Post by Adam C » 25 Nov 2019, 19:23

Looking ace Barry. Enjoy the journey.

Building isn't a rush and inveriably results in errors. Cant wait to see this one fly.

Barry Apostolou
Posts: 37
Joined: 07 Jun 2019, 15:36
Location: Surrey

Re: John Slater Airspeed Tern

Post by Barry Apostolou » 27 Nov 2019, 13:59

Hi, Tern Watchers,

The wings are now painted and drying off. As you will know I did not use ply for the leading edges of the wing. This was mainly due to cost and also I had loads of balsa sheets looking for a home. Accordingly I wanted to try and paint the leading edges to mimic ply, this 'Faux' type of painting was a popular decorating skill in recent years, involving 'rag rolling', 'dragging', 'scumble glazing', 'marbling' etc. All being techniques using paint to mimic wood, marble or other surfaces. A good buddy of mine is a sign writer who helped me with this effect. It is applied using a brush to drag across the covered surface to mimic the wood grain, and is just a mixture of Satin Varnish and paint to get the colour you want.

You can buy staining varnishes from B&Q and they do an 'Antique Pine' (Small pot £5.99) which is very like the color of varnished ply. The method is this:-

1) Mask the area for painting using good quality masking tape. This will determine the edge you get. You can use a stick on 'cheat line' in Orafilm to cover the join between the varnish and covering if the join line is too untidy

2) Ensure the surface is free from dust and other stuff found in work shops. I use a large soft brush for this. Also try and get some additional heat in the work shop to help with the flow of the varnish. Otherwise if too cold it gets 'sticky' and does not flow well across the covering. To give an idea of the colored varnish, it looked like clear honey. If you are adding colour make sure you have thoroughly mixed it all up, to prevent color changes during application.

3) Use a 1 inch soft brush to paint on the varnish with positive strokes going from root to tip. Remember each coat used will make the finish darker so you need to be bold and try to get coverage with the initial strokes, do not reload the brush for the same area. Do not paint into the masking paper too vigorously as this may cause the varnish to bleed where you do not want it.

5) When you have painted the whole area take another clean brush, moistened with white spirit and gently stroke it across the entire surface, again from root to tip. this will give the impression of wood grain. Before it gets any drier take off all the masking tape. This removal needs to be 'bold' and pulled away from the painted surface.

6) Having done this the best you can; leave it alone. do not try to 'over work' the varnish. You need to just go away and let it harden for 24-48 hours. Until it is dry and cured you will not improve the final outcome, I know this from bitter experience. Where I have tried to make things better and simply messed them up more.

A day or so later you can inspect the finish to see if you are happy with it, or if you feel it would be better/neater with a 'Cheat line'.

Well that is it for now, my own outcome as you can see on the picture was OK, not perfect by any means.

No doubt loads of people will point this out on the hill. However, as a builder of many vintage sailplanes I do have the perfect answer to this. It is

"When you do yours I am certain it will be perfect, mine was the best I could do at the time." (Tee, Hee )

Just the balancing and the maiden flight now to do now.

All the best

Barry
Attachments
IMG_303 Stained wing.JPG
Last edited by Barry Apostolou on 29 Nov 2019, 20:59, edited 6 times in total.

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VinceC
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Re: John Slater Airspeed Tern

Post by VinceC » 27 Nov 2019, 14:12

Lovely covering

Adam C
Posts: 8
Joined: 26 Oct 2017, 14:36
Location: Southampton

Re: John Slater Airspeed Tern

Post by Adam C » 29 Nov 2019, 15:37

Clever idea.. Not just a pretty face then.

No chance of a faux marble airbrake then?

Barry Apostolou
Posts: 37
Joined: 07 Jun 2019, 15:36
Location: Surrey

Re: John Slater Airspeed Tern

Post by Barry Apostolou » 29 Nov 2019, 21:02

Good idea, I am certain then that some one would say........ " Marble ?? That's too heavy" :)

ATB Barry

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