Jump to content
This site uses cookies! Learn More

This site uses cookies!

You can find a list of those cookies here: mysite.com/cookies

By continuing to use this site, you agree to allow us to store cookies on your computer. :)

Recommended Posts

10 hours ago, Reconcilor said:

OK - it's all Hendie's fault

 

Thanks !   It always gives me a great sense of pride when I get the blame for other folks good work

 

 

16 minutes ago, Reconcilor said:

What could be better than this?Well your Pullman build for one thing!

 

nah.... not better... just different, that's all.

 

Share this post


Link to post
Share on other sites

Details and Gross Stupidity

 

I have decided to start putting headings on each of my major postings. This one was going to be called 'Details...Details' until about 5 minutes ago when I realised what a complete dullard I have been over the last few days.

 

As posted before I have been really looking forward to getting some primer on this model but before I can do so there are a handful of potentially tricky details to get in position.

 

The first were two quite small but distinctive trailing edge 'stakes? 'fairings? 'fillets?' at the trailing edge of the wing root. 

 

IMG_4215

 

You can see them here fitted. It's not a very interesting story really - these have just been shaped from bass-wood and PVA glued in place - since this photo they have been filled with Vallejo filler and sanded to shape and they look OK now.

 

IMG_4219

Here's a blurry photo of them getting sanded. Suffice to say they came up alright and didn't cause any grief.

 

It was the next part of the story that causes grief.

 

IMG_4195

As you can see from this drawing there is a prominent bullet-shaped fairing at the rear of the tailplanes that houses an anti-collision light. I was thinking of leaving this off - because it is generally not very visible in photos - most of which are taken from the side and the bullet shaped extension is often / usually obscured by the tailplanes. But since I was working to these drawings I felt it had to go on - even though it was in a difficult spot and looked like it was going to be difficult to 'engineer'.

 

I also however, noted two small reinforcing fillets under the tailplanes that blended into the 'bullet' so I figured that this was the key to a successful structural approach to creating the cursed thing.

 

I figured that if I could carve a split into a fine length of dowel then either side of the split could be glued under the tailplanes (into the positions of the fillet) and that there would be sufficient surplus dowel left for me to carve the bullet from. This bullet would then stick out of the aircraft like it's supposed to.

IMG_4181

 

So far so good...but you know what's going to happen of course...

IMG_4182

 

Yep!  Inevitable really.

IMG_4196

 

So then I thought I would try again - with plastic. Same approach...

 

IMG_4197

Yep - you guessed it.

 

So then I had a think and dreamed up a new approach.

 

Drill a hole in the necessary spot,

IMG_4199

 

Fit a length of carbon fibre - amazingly tough stuff this - will bend in long lengths and can be cut easily but will not break.

IMG_4200

I was starting to think I was clever.  Has anyone spotted the fatal flaw in all of this yet?

 

Now I did a naughty, naughty thing!  As I do not own a lathe I used a power-drill as an improvised lathe. I chucked a piece of dowel into the drill bit and shaped the bullet point using sandpaper. A golden rule of industrial safety is to never improvise tools - but I got away with it in this instance. One day I might buy a very small lathe.

IMG_4203

 

So now all I needed to do was drill a hole in the bullet and fit it onto the carbon fibre.

IMG_4208

 

Perfect - and after a bit of filler and sanding I was feeling well happy with myself.  I had overcome a technical challenge, used a new material (carbon fibre) that I reckon I will use over and over again in future and had made a passably accurate anti-collision light fairing for my Mig. Result! Or so I thought...

IMG_4213

 

Just now when I started writing this up I had another look at this image and the pure unadulterated stupidity of what I had done finally hit home.

 

IMG_4195

The 'large bullet shaped fairing' that you can see isn't a 'large bullet shaped fairing at all!' It's the tip of the tail fin! The real anti-collision light fairing is much smaller and is not really represented in this view at all. The damned thing is tiny! About 10% of the size of the mammoth overgrown knob that I've stuck on the back of my poor embarrassed Mig. The poor aeroplane now has to fly around the countryside with a 'growth' sticking out of it's...

 

OK...this has to be corrected.  But primer first - I can wait no longer...

Share this post


Link to post
Share on other sites

Oo, primer, progress. Missed your company and banter on Saturday. 

Grant

Share this post


Link to post
Share on other sites

Thanks mate! A family event cropped up at the last minute and it was kinda compulsory. It was actually pretty good too! See you next time, and next time I might just have a canopy mold for your vac-forming pleasure.

Edited by Reconcilor

Share this post


Link to post
Share on other sites

A canopy buck. Must get some testing of new machine done on old bucks found in the recent move. 

Grant

Share this post


Link to post
Share on other sites

Finally, Primer!

 

OK it's time - this thing's going to get painted.  Overall I'm fairly happy with the project but right now it looks 'bitsy' and 'messy'. A good even coat of primer will, I hope, make this look a lot more respectable.

 

First step is to make sure all the last details are on - there's a very prominent reinforcing sheet added to the tail where the tailplanes meet the tailfin and that's been modelled with very, very  thin (0.13mm in fact!) Evergreen plastic card. I have also secured the wing fences in their slots using cyanoacrylate superglue.  Now I'm all ready to start masking.

IMG_4234

 

For the primer coat we need very little masking - just some tape inside the cockpit and then any last gaps filled with silli-putty. There's also a dab of Windsor and Newton masking fluid on the front of the cine camera lens.  I have a 25cm long length of plastic tubing that fits exactly into the jet outlet so that makes an ideal painting handle. OK - let's go to the shed and spray some paint!

IMG_4238

 

I have a can this stuff waiting for use. I have tested it on plywood - and it works very well, so I'm not going to bother with any wood-primer on the tailplanes.

IMG_4246

 

And now the big moment - the first primer hits the model!

IMG_4254

After leaving the first coat an hour or so to dry and harden a bit I gave it a second coat.

 

And here's the result - one grey 1/48 Mig15. Much tidier looking than it was!

IMG_4287

 

Shame it's not a modern jet in low-vis colours; I could walk away and call it finished right now! 

IMG_4289

 

I am happy with this. It almost has a 'shark-like' quality in this view.

IMG_4295

So that's the long-awaited primer on. As you can see there's some tidying up to do; some rough surfaces to fix and so-forth but I am pleased with the outcome. :smile:  I hope you like it too!

 

Next step - Start on the Natural Metal Finish.  I have a strong suspicion that it's going to be all downhill from here! :worry:

 

Share this post


Link to post
Share on other sites

it's always a good feeling when the first coat of primer goes on isn't it ?    Looks good though I fear that with a natural metal finish, you're going to  be micromeshing for some time to come

Share this post


Link to post
Share on other sites

That looks very sharp! You wouldn't believe it was a "wooden wonder".

 

Regards,

Adrian

Share this post


Link to post
Share on other sites

Inspect, Fill, Sand, Inspect, Fill, Sand...

 

I think Hendie got it right with 'I fear that with a natural metal finish, you're going to be micro-meshing for some time to come...'  Yep!

 

However, in addition there are one or two corrections to make before attempting the finishing coats. 

 

Here's the first one; in the photo below you can see a prominent 'notch' running around the fuselage about 2 scale metres ahead of the cockpit opening.   This is the left-over scar from where I inserted a thin slice of plywood to fill the kerf from the rebate cut ('Kerf' is a real word I only recently learned - google it if you like - it means the slot or incision left by a saw).

 

IMG_4292

 

The Photo below is a reminder from what seems like a long, long time ago.  That layer of plywood ahead of the cockpit is what's causing the issue. It would seem that during subsequent sanding and shaping it has 'eroded' more than the surrounding, hard Jarrah. Under a layer of primer the error stands out hideously - under Natural Metal it will look even worse.

 

IMG_3169

 

It should be fairly simple to fix I hope.  Just scour the area that needs filling (in this case with a series of X shaped scalpel cuts) and fill with Vallejo filler.

 

IMG_4300

 

And the other job that needs to be done is to trim that tail fairing down to a sensible size. Mercifully, this turned out to be a fairly simple exercise in whittling and sanding.

 

IMG_4303

 

And with these two jobs done and some other patching (mostly with very quick drying 'Perfect Plastic Putty') my Mig 15 looked like this. Ready for...

 

IMG_4305

 

Sanding, sanding, sanding...you know the drill. 

 

IMG_4314

 

I normally find sanding 'therapeutic' - but not at this stage. Here I have to concentrate because one slip and some detail or another will be damaged.

 

IMG_4317

 

OK - she's ready for her second primer.

 

IMG_4323

 

This second Primer is a lighter dusting than the first one.  A bit more sanding with increasingly fine grades of micromesh (down to and including 12000) and I think we are ready to try spraying the first layer of metallic aluminium. I'm hoping that it will go on tomorrow night, so stay tuned.

 

I have selected and tested the paints on a block of Jarrah. I think I'm ready to go...

 

IMG_4313

 

 

 

 

Edited by Reconcilor

Share this post


Link to post
Share on other sites

painting always fills me with 50% anticipation and 50% fear. (and that's just bog standard colors)  I think I'd need a good stiff drink attacking this one

Share this post


Link to post
Share on other sites

Looking good with the primer coat on. Should look even better with the NMF!

Share this post


Link to post
Share on other sites

NMF - Part 1

 

Well here goes! For the viewing pleasure of 'Wyvern S4' 'Van Roon' 'The Baron' 'Chaotic Mike' and 'Mike Romeo' all of whom voted for an attempt at a Natural Metal Finish...here comes the first coat! Remember, if this doesn't work - I'm reverting to a Korean War stripy camouflage scheme.

 

Generally  I use an airbrush. But on this occasion I think that it'll be quicker and easier and more consistent to use a metallic lacquer spray can.  Here's the chosen weapon'. If you look carefully in the background you can see the intended victim shivering in fear.

IMG_4326

 

The moment before the very first lick of NMF hits the target.

IMG_4356

 

And the result a few minutes latter - paint still drying of course.

IMG_4382

 

Not perfect by any means - but as my father would say...'a blind man would be pleased to see  it' or alternatively...

IMG_4384

 

'It'll pass in the rush with the lights out'...

IMG_4383

 Suffice to say - it could be worse. Just view these photos on a screen no bigger than an I-phone 6's and it should look OK. :think:

 

Next step? Inspect, sand, fill...Inspect, sand fill (or maybe just inspect and sand?). :unamused:

Share this post


Link to post
Share on other sites

Well, I have to admit that on a first pass, that's turned out a lot better than I expected.   That is meant in no way to denigrate your skills whatsoever - it's more that I anticipated the shiny finish to show up a lot more flaws opportunities for improvement

 

It is certainly looking good. Great job !

Share this post


Link to post
Share on other sites
22 hours ago, Reconcilor said:

Good idea! Make mine a Glenffidich please.

Pub malt. Try a Glenlivet, 16 yr old. I'd join you, but I've been off the sauce since June. :(

Share this post


Link to post
Share on other sites

That came out all right Reconciler.

. Buffable metallic paint can improve with polishing and other handling but is fairly fragile when handled repeatedly before being sealed. Testors metalizer sealer is very good. 

G

Share this post


Link to post
Share on other sites

Ok. Sounds like good advice! Does the sealant go on before or after the decals? The best way to apply decals for an NMF is causing me some concern - normally, on a painted finish, I would paint , apply a gloss finish (say pledge), apply decals, seal with more pledge and then spray on the final satin or Matt varnish. But I'm unsure if that approach is compatible with this finish. Any thoughts welcome. Am working on that canopy 'buck' tonight.

Share this post


Link to post
Share on other sites

Carving a buck, not a stag. 

Ive sprayed one coat of TMS (testors metalizer sealer) before the decals and once or twice again after to merge them in. However, the more clear, the more toy like. Are your decals glossy?, perhaps give them a coat before application.

G

Share this post


Link to post
Share on other sites

Canopy - Part 1

 

When I were a lad I, used to make my canopies by heating a small sheet of clear plastic with a candle and then 'smash molding' them over a carved wooden former.  Ah... those were days!  But now it's the  21st century and my mate down the road, Mr 'Van Roon' owns a vac-forming machine. Now, I've never vac-formed anything in my life and to be honest I'm still a bit hazy on the subject, but I've just been dying to have a crack at it. So let's have a go at vac-forming the canopy for this project.

 

First however, I am going to ramble on again, about some wood.  This is a piece of 'liquidambar' (no spelling mistake it's ambar with an 'ar' not  'amber with an er').  Apparently it's also known as 'American Sweetgum' and 'Satin-Walnut'. This piece of wood was sold to me by a vendor who highly recommended it for carving and whittling, and wow! - did that guy know what he was on about!  This stuff is incredibly good to work with in every regard and, if ever I'm stupid enough to embark on a project like this again, this is what my next fuselage will be made from. Shown below is a the result of a simple test to see what it might be like to scribe panel lines on this stuff - the result is sensational - each line is straight and clean and even. This is much better than I could manage with Jarrah.

 

IMG_4389

 

So - Liquidambar it is for the rest of the canopy making project.

 

In order to make a vac-form anything it seems you need a mold (also known as a 'form' or a 'buck') to shape the plastic. I believe that the mold can either be 'male' or 'female' and it seems that people that really know what they are doing recommend 'female' or 'concave' molds. Such molds however are harder to make so I'm going to go the easy way and carve out a 'male'.

 

For those of you who have been following along the next few steps should seem quite familiar...

 

Stick on a profile view of the required shape.

 

IMG_4396

 

Remove most of the unwanted material with a saw, in this case a fret saw.

IMG_4398

 

Cut in closer to the final profile with a chisel, here a scoop chisel.

 

IMG_4400

 

Use sandpaper to achieve a more accurate final profile.

 

IMG_4402

 

Now repeat the process on the top view.  As you can see - because the plan view now needs to be applied to a curved surface the length of the original drawing is not long enough. This is a classic case of a 'foreshortening problem' for which there are doubtlessly many highly sophisticated mathematical solutions. 

 

IMG_4404

 

Here's my fix! Cut the paper up and move the bits about until the framework lines up. This is close enough for jazz music.

 

IMG_4405

 

Cut with a rusty razor saw whose handle fell off years ago. It actually is rusty and will be thrown away soon - but after waxing the blade with candle wax it still cut remarkably well. Please take better care of your tools than I do.

 

IMG_4406

 

 Rough cut complete.

 

IMG_4408

 

Chisel the vertical shape. (I have taken much better care of my chisels than that poor razor saw).

IMG_4409

 

Sand to shape.

 

IMG_4412

 

Chisel and sand, being careful to leave the red marker stripe...

 

IMG_4413

 

Getting there - more sanding required at this point. Note how the armoured windshield is red - that's because I had already achieved the necessary flat panel on this surface and wanted it to survive the sanding / chiseling attack.  If the red remains, the shape is intact.

 

IMG_4421

 

And after some final fine sanding and polishing I can cut the canopy mold off it's base.

 

IMG_4428

 

Leaving this encouraging looking shape.

IMG_4431

 

That's enough for now - but suffice to say, the mold is not actually complete.  There's plenty more work to follow.

 

Best Regards,

Reconcilor

 

Share this post


Link to post
Share on other sites

That's coming along very nicely indeed!

 

Mike.B)

Share this post


Link to post
Share on other sites

Beatiful finish on the wood. Lovely close grain.

Did you use sealer, or is that bare wood?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×
×
  • Create New...