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Author Topic: Focke Wulf Fw190 A-8 - BUILD  (Read 9673 times)
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Russ Lister
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« on: April 22, 2010, 06:53:52 PM »

The title for this should perhaps read: 'My Indoor Scale Nats Build - FAIL' ;Undecided

I had hoped to get this model finished for the indoor scale nats - as you will see, I am still a long way off so I suppose I am starting this thread to 'vent my frustration'.

I have designed the model hoping that it will be light enough for indoor flying but suitable for outdoors too.

I have an old Airfix 1/72 kit for the Fw - I've always liked the 'texture' of the 'laddered' flying surfaces and wanted to get that same feel with this model. I have taken the route of 'lots of little bits' so the model is not as heavily built as it might first seem ( Tongue)

I'll start the thread with the bones almost all there. The model was primarily drawn from John Weal 3 view drawings with further help from the Bluebottle Squadron boys and the Bentley drawings. I later found that the drawings I scaled from were not quite 1/72 scale, so the model is 1/19.6 scale instead of the intended 1/20 scale. It's about 21" span anyway!
« Last Edit: April 22, 2010, 07:07:06 PM by FFmodeller » Logged
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Russ Lister
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« Reply #1 on: April 22, 2010, 07:02:53 PM »

The aircraft I am specifically modelling is the Fw-190A8 4.JG3 WNr681382 flown by Wilhelm Moritz Gruppenkommandeur.

I like the 'blinkered and bulges' look of this version - some of the bulges are quite hard to reproduce. Combined with the armored glass panels to the side of the canopy it looks reet aggressive!
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Russ Lister
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« Reply #2 on: April 22, 2010, 07:15:23 PM »

Still a fair way to go with the structure with fillets, peg retainers etc. etc. before I start covering.

The gap at the wing root is there so I am not doubling on weight when the water colour paper fillets are added. The formers radius into the wing root and will act as support for the fillets.

The surfaces are just taped on and out of alignment in places - still a fair bit of final sanding to do too.
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Re: Focke Wulf Fw190 A-8 - BUILD
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« Reply #3 on: April 22, 2010, 07:29:05 PM »

I have enlarged the tail surfaces as much as I think I can without getting 'nobbled' by the static judges (BMFA rules) - still a bit on the small side but if I have any problems I will enlarge them on the second version of the model - with the accent more on flying - that I hope to do.
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Don McLellan
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« Reply #4 on: April 22, 2010, 10:39:21 PM »

Beautiful work Russ. The detail is first class. Will this become a kit, or drawing for scratch build or..... ? Looking forward to a lot more pictures!! What is the weight so far?

Don
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« Reply #5 on: April 23, 2010, 02:36:42 AM »

Russ

Very nicely done. I really do like the work on the ailerons, and it's a shame that you've run out of time for the Nats - next year perhaps.

It's craftmanship like this that confirms my need to stick to duration models Grin

Peter
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« Reply #6 on: April 23, 2010, 03:22:46 AM »

Coooor, that looks nice, keep us posted with updates!

M.
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Russ Lister
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« Reply #7 on: April 23, 2010, 05:25:48 PM »

Thanks all Smiley

Don,
I do have a lighter version in progress that would be perhaps more suited to kitting or a plan - not that I want to write this version off just yet! The weight is already up near my total target weight at about 35g - but to be fair that was based on less than 0.5g per sq. in. that I was hoping for but not really expecting.

Peter,
I have to admit that I have had thoughts myself of moving to duration models a little more. I've already been working on this for months and still not got there. I am thinking about doing a trial design and build from now 'til the FF Nats as a comparison of 'effort v return'. I still wouldn't give up the scale stuff but I might get my flying hours increased?
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« Reply #8 on: April 25, 2010, 02:25:53 AM »

I am speechless.

I have never before seen subtle features of the prototype's structure rendered in the model's framework like yours has. For example the peculiar angle of the wingtip-to-wing joint as seen from above and the triangular section on the fin, to name a couple.

Marlin
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« Reply #9 on: April 25, 2010, 12:54:38 PM »

Russ,

Superb craftsmanship! You have captured the full size plane just perfectly. Will you be bringing the model to Old Warden in May?

Steve
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« Reply #10 on: April 25, 2010, 05:38:48 PM »

Thanks Steve - I think that the Mayfly is a bit too close now to get it finished. I'd be happy to get it done for Peterborough in September!
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« Reply #11 on: April 25, 2010, 06:04:55 PM »

Russ,

I was hoping you might bring it along 'as is' I’d live to see it before you go and hide that beautiful structure under tissue.

Steve
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« Reply #12 on: April 25, 2010, 06:16:30 PM »

Will do Steve - I did take it today to the indoor scale nats.

Talking of beautiful structures - at the nats today I got my first chance to see Robert Pajas's models in the flesh ... wow! Some great models there today - a little down in the open classes I thought, but a lot of overseas visitors. A good day!
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« Reply #13 on: April 26, 2010, 07:40:11 AM »

I hope someone took LOTS of pictures and vids Wink.
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« Reply #14 on: April 30, 2010, 06:35:32 PM »

Pit,

I did take a few ... most of them have been posted over on SFA
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« Reply #15 on: April 30, 2010, 06:42:44 PM »

I thought I would run through the process of moulding the canopy ... hopefully this might be of interest to some?

I wanted to carve the mould blank in situ but didn't want to run the risk of damaging the structure trying to carve a heavier mould material. With this in mind I went about it in what might seem like a long-winded method. It did seem to progress quite quickly though.

Stage ONE

I carved the shape of the canopy in situ using pink foam. Once carved and sanded I gave this a few coats of clear acrylic varnish just to protect the surface a little.
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Re: Focke Wulf Fw190 A-8 - BUILD
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« Reply #16 on: April 30, 2010, 06:47:26 PM »

I am recreating the process here with the components created at each stage .. this is not the actual progress.

I built up the pink foam with clay to a level base (not shown) and overlap for waste when vac-forming the canopy. This assembly was then covered with a 2 part silicone moulding material. This sets in not much more than 10 minutes.
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« Reply #17 on: April 30, 2010, 06:49:31 PM »

When fully set the female mould was removed from the foam male.

This was then set level on a block of wood using the same clay as I had used to level the foam male.
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« Reply #18 on: April 30, 2010, 06:52:27 PM »

I then poured hard plaster into the mould and allowed this to fully harden. (the photo shows a 'papier mache plaster' trial piece placed back in the mould if you wonder why the plaster does not appear to have flowed into the mould fully)
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« Reply #19 on: April 30, 2010, 06:54:44 PM »

This photo shows the rough 'papier mache plaster' removed - the hard plaster was smoother but still need final finishing especially where there was the odd air bubble in the silicone mould.
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« Reply #20 on: April 30, 2010, 06:56:07 PM »

Here is the hard plaster mould finished and fixed onto a balsa base - this helps to stop the plaster cracking under pressure in the vacuum former.
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« Reply #21 on: April 30, 2010, 06:58:52 PM »

Here are all the parts together, including one of the earlier formed canopies.

You probably know already, but if you press the play button to the top right of the first image, the site software will give a slideshow of all the images.
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Don McLellan
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« Reply #22 on: April 30, 2010, 07:32:51 PM »

Very interesting Russ. Thanks for sharing.
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« Reply #23 on: April 30, 2010, 07:50:20 PM »

Top shelf wood work.
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« Reply #24 on: April 30, 2010, 07:56:39 PM »

Gosh Russ, What a nice set of bones. I can't believe how detailed it is. I agree with Steve in that it is almost a shame to cover that gem.

Caley
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What's stall speed?  Undecided
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