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SFS 31 Milan

Posted: 15 Sep 2015, 00:12
by Noël Rumers
Hi,
Here I am, finally, with the nose turned into this new build, parallel to the SF27 M, the SFS 31 Milan.
What is this Milan? Well simple described, the RF4 fuselage with the wings of the SF27 glider.
So we count: 4 + 27 = 31 or the SFS 31 Milan.
I have had great help of the owners in the UK of the D-KORE and now being the G-KORE.
Measurements have shown that the RF4 fuselage was changes on a few point to make it work on the Milan. Later more about these changes.
All was redesigned over the French drawing I have out of the French scale magazine from some years back.
The drawing was highly detailed and to a very good scale standard. This made my work more easy in the end.
All was copied and the real work could start, cutting the parts the old way, by hand.
Accordingly the design of the SF27 M in the section of building threads, I like a kind of jig saw puzzle.
This is the system I used again.
Noël

Re: SFS 31 Milan

Posted: 16 Sep 2015, 10:07
by Noël Rumers
More work done now.
I finished all cutting and drilling by now.
Also the top and bottom spars are glued together.
A dry fit was also tested and all looks OK for now.

Noël

Re: SFS 31 Milan

Posted: 16 Sep 2015, 10:09
by Noël Rumers
More pictures...
Noël

Re: SFS 31 Milan

Posted: 16 Sep 2015, 11:41
by Peter Balcombe
Looking good Noel.
I will be following with much interest.
Peter

Re: SFS 31 Milan

Posted: 16 Sep 2015, 13:23
by Noël Rumers
Hi Peter,
Now the building will go till the end of both models, the Milan and SF27 M.

As promised I wanted to build ours 1/3 scaled first before having a PDF made of the drawings.
Good I did, in every design are always small bug that get into a design.
Also with this one although the checked and double check...the good thing was I had no need of cutting new parts due to the bugs.
I could change the minor mistakes in time.

I will change the drawings soon, so you can move on as well.
Noël

Re: SFS 31 Milan

Posted: 16 Sep 2015, 23:31
by Noël Rumers
More work was done today to clean the formers and other pieces.
Again a dry fit was carried out to make sure that all fits properly.
The landing gear former...this is of special interest to us.
I have seen two fuselages, one 1/3 scale and one 1/2.5 scale, which needed a lot of reinforcement to hold the gear in at all times.
Nothing can be said about leaser cutting, but in both cases the formers were in layers of 3 mm ply with slots to get all together.
Cutting one slot from the bottom and the matching part from the top with glue is not strong enough for this purpose.
That is why I made a 14 mm thick ply former, being former 5 and 6 mm and former 5.1 being 9 mm ply glued together. I did cut a rectangular hole out in this formers, to be able to push the wheel box side tongue through this hole. This tongue matches with the seat former, that will be glued head to head and then supported by a double piece that is pushed in from behind. This double pc has also a tongue that will be glued to the wheel box side from the inside. This way the 14 mm (maybe a bit too strong) former will hold the landing gear under any landing condition.
Noël

Re: SFS 31 Milan

Posted: 17 Sep 2015, 23:54
by Noël Rumers
More work done today,
Noël

Re: SFS 31 Milan

Posted: 20 Sep 2015, 21:42
by Noël Rumers
No time to post...
here the progres.

Noël

Re: SFS 31 Milan

Posted: 20 Sep 2015, 21:47
by Noël Rumers
...a few more...
So far so good!
Noël

Re: SFS 31 Milan

Posted: 20 Sep 2015, 21:51
by Noël Rumers
And more from today...
The rear and the front were glued together.
The top is the canopy line from firewall to the elevator and rudder platform.
The turtle back will be glued on later.

Noël