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airscale

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airscale last won the day on July 8

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About airscale

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  1. thanks chaps Hi Brian - no, it is too near completion really, so I am going to save it for next year when it is finished... this one will be though Peter
  2. thanks chaps - much appreciated landing gear then... ..I started with the lower castings as these are probably the hardest part - made a spigot for the wheel, the bent fork and the collar that is at the bottom of the strut from brass on my lathe.. ,,these were soldered as they carry all the weight and the main legs turned from brass... the compression strut was a polished steel rod I got on ebay.. ..then all the mountings for the torsion links and other bits and bobs were added - the strut assembly was glued with epoxy adhesive, the rest of the bits with CA.. ..the torsion links were made upfrom brass tube, an inner litho shape (I wish I had photo-etched earlier) and plastic card for the casting sides.. ..the ends were glued while on a quick jig from rod so there are no surprises later... ..using pins to align the torsion links so I can add the mounts to the upper strut - I don't want them fitted until after painting.. ..then both struts were prepared for a shot of a silver/white enamel mix... I didn't have the right alclad to hand so I must get some at Telford next weekend ..once painted & assembled I added the brake line, but there are two much finer rigid lines that run up the leg and down the fork that I will have to add once the gear is in place as one goes in the wheel hub (I think) and the other up into the U/C bay.. ..the 3D printed wheels were cleaned up, painted & dirtied a bit.. (thanks Tim) ..and a dry fit.. ..and for the first time it is on it's wheels.. ...outer doors next... TTFN Peter
  3. evening ladies so, it's been raining all day here, so what better excuse that to spend the day at the bench here is the task - something else I have been quietly dreading as it's so distinctive... ..the B/C doors are very different to the D, so this pic of Lopes Hope is super valuable reference.. I started by getting the PE templates I had made a while back along with lots of other bits & bobs after scaling the drawings - once I had these I made up laminates of sheet stock until I had the thickness right and dremmeled out the wheel disc and started to prepare the indentations... ..further refining the shapes and a quick test to see how the skin responds to the plastic core shapes.. seems ok so we press on... ..once the core is finished and has cutouts for the retraction arm etc added, it was lightly CA'd to a perspex sheet to start the skinning process... ..after one try where I split the sheet, I CA'd the core to the PE door template and then CA'd that to the perspex - after working it some details start to be added.. ..the sheet was then removed from the core so the raised rivets can be added.. ..the outer skins were made up.. ,,and after making the covering strip & painting it, the doors were assembled & detailed with brackets etc.. ..this side has a strut mount in a semi-circualr indent.. ,,and this side has the retraction strut mount.. ,and in place will look something like this.. ..thats it for now, lets hope it rains again tomorrow TTFN Peter
  4. hello again so while I can't fit them yet, I wanted to get the flaps built up.. I used the same principle as the ailerons in that an inner core with raised rivets was made and then skinned with panels with normal rivets - you can see the raised rivets on the trailing edge in this shot... ..the first thing was to get the drawings into the overall 'folded out' shape along with the rivet markings - the raised ones are in threes along the trailing edge. there are also cutouts & shapes along the leading edge which curves under the wing trailing edge.. ..I always work in pairs if twothings need doing, so I don't do one and get bored doing the other, so bothe were made and folded.. ..the drawings actually had me confused as they show the lines of lateral rivets in paired rows, but all the pics I have show just one row so that was what I went with - here are an upper & lower pair for the panels with recessed rivets - the bottom one has just been done, the top one already burnished out to get rid of the 'pillowing' effect of the rivetting process.. ..the structures were strengthened with thick card and an inner core made up to define the profile and stop sagging.. ..details added and taped up ready to paint YZC where needed.. ..then the rivetted panels were added - here tape acts as a hinge at the top, and is masking where the impact cement goes at the bottom.. ..after painting the details showed quite well - I also noticed the curved edge that goes under the wing is normally seen quite glossy, I guess it doesn't get as much exposure as the rest of the structure, so I polished this area.. ..I also worked up and fettled the wing & fuselage so they fit and painted the recess YZC ..the aileron detail can still be seen.. ..not at the right angle or fixed yet, but you get the idea.. ..and that is the flaps nearly done - I will finish the fittings when I fit them .. ..I have the 3D printed wheels & hubs I designed from Tim Perry now, so they are next to take a look at TTFN Peter
  5. thank you my friends been away on business a bit so not much done, but I guess enough for an episode.. ..ailerons... lets take a look - see how there are both raised & indented rivets... there is also what looks like an overlapping panel at the forward half of the aileron (forward of the trim tab) so I thought I would make a folded metal part with the raised rivets, and add the other panel on top with indented rivets.. ..I started by adding both sides of the drawing together to get what it would be if folded out flat and pinpricked where the raised rivets were - also scored the trim tab... ..then after turning it over and adding the raised rivets, i folded it and folded the leading edges to get the inner (and main) part of the aileron ..then I made and rivetted the overlapping panel, also folding down the leading edges.. ..a thick plastic card spar was then added and once I had made both ailerons, they were filled with Alec Tiranti expanding foam - this stuff goes rock hard and was actually a bit of ballache to clean out of the open end where the aileron meets the flaps.. ..with both done, I started removing the trim tabs - these were waste - I made new ones with raised rivets.. ..soon both were completed.. ..the exposed end seen because the flaps are down was detailed according to pictures & drawings.. ..and with two fixing rods fixed into the leading edges, they were mounted to the wings - I might live to regret this but the wingtip fairings after profiling to neatly fit the ailerons were getting really fragile and will break so hopefully this will protect them.. ..Flaps next - they are an interesting, if similar structure.. TTFN Peter
  6. thank you folks - you are too kind Hi Gary, yes they are in Scotland and can do bespoke PE if you have vector artwork in the format they work to - I guess an A4 sheet is about £50 GBP with delivery in the UK - here is the link.. Hi Gary - no I do them one by one using a home made PE spacing template in stainless steel - millions of them.. it can give you repetitive strain injury pretty quickly carrying on with the wing fillets - the borders are laid out with tape to rub soft metal into to get the shapes in 3D after translating the plan profiles.. ..taped down & burnishing.. ..the forwardmost fillet is one piece and very difficult - there was nothing for it but to have a go at bashing some ali into shape - itv soon kinked and creased and took a lot of work to get even half right... ..you can see here how the material just wouldn't do what was needed and split in one place - no matter I thought I could let in a piece here - this had any inner creases filed down to give it the best chance of truly flattening out when fixed.. ..still working it.. ..and finished & with fixings.. it's not perfect, but good enough for me.. ..same on the other side.. ..the PE arrived for the front vents so I could do this panel too - another tricky one.. ..first step was to add the vent structure and then make the front seam of the panel meet the nose intake casting... the rest of the panel lines could be dealt with with overlaps being removed.. ..with both panels & the vents added..,. the fasteners are added, but not yet all the riveting.. ..and the nose is pretty much coming together.. ..still lots to do despite it looking quite complete... TTFN Peter
  7. Hi folks having finished the upper cowl panels, it was time to move below, the first one to set down was marked out with 3mm tamiya tape to allow another masking tape template to be made of just the straight rear edge... ..once that was done the panel was burnished down to the front defining edge and cut out - her it is once it has been fixed down and some of the fasteners added.. ..then the remaining fasteners & rivets and a hatch was added.. ..I was going to do the panel forward of this one which has the distinctive small air intake panels with lots of holes, but found the PE ones I had made are not scaled correctly as they are too big so PPD are running me up another set - as such I did the panel behind it instead and will complete it when the PE arrives.. ..while waiting for the PE I decided to prepare & paint the wings so I can work on all the wing fillet panels - these had already been etch primed months ago so were cleaned up and sprayed with alclad white aluminium... I was a bit worried about the fragility of the alclad paint, but after a gentle wire wolling to get rid of the dusty finish, it seems to be ok with some tape tests I have done - I have had it in the past where tape just pulls up or damages the finish.. ..with that done, the rearmost fillet was planned - it looks like this and is not only a signature shape, but full of compound curves... thankfully it's in two parts - upper & lower and the seam can be seen - it's actually a weld, but I haven't figured out how to represent it.. ..using drawings I made the upper shape and worked this into shape across the fillet to get the three dimensional shape.. ..and eventually both upper & lower were added to the model... ...the fillet right at the front on the leading edge looks really difficult so back when I have worked that out TTFN Peter
  8. evening boys & girls Hi - it's a set of jewelers Awls with a 'Mega Tool' brand on them - I think I got them from UMM USA ..time for a nose job... ..this is one of the two detatchable panels that sit on top of the engine.. ..step 1 was to prepare the surface so it's nice & smooth and to mark the centreline.. ..then a sheet of soft aluminium was prepared by adding the row of rivets that go along the seam where the two panels meet and the fastener positions that run along the centreline on each side... then this was taped to the centreline... ..you can see rivets along the bottom scrap edge where I ballsed this up once already.. ..then the sheet is burnished down to the cowling with balsa blocks and in some areas around the nose where the curves are most acute, with a ball pein hammer... ..masking tape is used to hold the panel taught where it should be as the surface is worked from the straight edge centreline, to the outer curves.. ..soon the panel is roughly done and the borders appear as raised edges.. ..the masking tape is removed to see whats what.. ..the panel is then trimmed & fixed with contact adhesive, using the centreline tape to as a hinge to keep it's relative position and the overlaps start to get filed / sanded away.. ..with both sides done and the surface sanded smooth to remove irregularities (like glue highspots), the rivet detail was gone over again.. ..with the fastener details defining the lateral rivet detail position, tamiya tape was laid out to set out the spacing - interestingly these rows of rivets are perpendicular to the A/C datum, not the cowling which is tilted slightly downwards... ...also the hatches had been let into the structure by taping them down and tracing the outline with a new scalpel blade with the waste later removed.. ..once complete another burnish to get everything nice & recessed and a wire wool clean up.. ..lower cowl next... TTFN Peter
  9. thanks chaps & good evening again another step forward and in some ways another escape from the devil of modelling- transparencies... they are my nemesis and I am literally on the verge of a cardiac arrest every time I go near them on the model.. ..not many WIP pics, but here is the original... ..I started by putting down a false cowling panel so all the panels around the cockpit will butt up against it and I will get a clean sequence of joins.. then added the strip that goes around the rear of the windshield where it meets the canopy windows.. ..once that was down I added the top framing which was made up from strips of tape on the model and then made up in litho.. the strip was attatched with CA, but all the rest with contact adhesive very, very carefully ..the bottom of the frames around the armoured glass is really hard to get right, and I haven't but it is the best I can do - I started with some ali/tin sort of soft metal sheet I have and teased it into position before marking it out... ..and then no more WIP pics until I had all the panels down -sorry about that ..so I am relieved it is done and will now tape it up to protect it while I sort out the cowling panels.. TTFN Peter
  10. thanks folks & good evening.. :) Thanks Laurent - it is good to know I ballsed that up - I guess I followed the drawing without cross checking the airframe and that must have been a D. I have looked at whether I could strip it off and let in a clean bit of litho, but for now I am not sure I could make it disappear so may end up leaving it I woudl always rather know these things, than blither on in ignorance :) oh no, I do that a lot, you just don't normally get to see it :) .....a bit more done over the weekend.. I was pleased to see the glazing survived under it's protective film, but it was time to take that off and add the frames, these are PE and have been amended from the drawings to allow for the fuselage curvature - the drawings are flat as you look at it side on.. ..here the frames have been added and a tape template to start to derive the top panel.. ..with that panel and the lower surround with the grab handle cover done, it was time for another fuselage panel... ..after both sides were done, I couldn't do the next panel until the exhaust panels were in to set the firewall line.. I added the exhaust mounts first.. ..then annealed the PE nickel silver panels that surround the exhaust - these have all the fasteners etc etched in, but as you can see discolour badly when annealed - it all sanded out though.. ..then after much careful measuring & pre-shaping the panels were added.. ..then the main side fuselage panel could be added - here it is finished and a tape hinge added so as the adhesive goes off I can just swing it right into position - you can also see a tube section for the flare pistol and the bottom was annealed to conform to the fuselage as the wing fillets will go over the lower section.. ..too big to really photograph on my bench, so a few shots as the evening sun was going down... ..all the skinning needs tidying up & finishing, but it is getting there panel by panel.. TTFN Peter
  11. Hi folks Hmm - I have been thinking about that, just looking into what is involved ..back again with a bit more done... first the top canopy section was made as a plug and the boiling water process used to form PETG around it - here it is pretty much fully wrapping the mould.. ..and with framing added inside & out.. ..Steve at Model Monkey 3D printed the correct gunsight for me from the Don Lopez cockpit photo and it turned out brilliantly - added a few details and good to go.. ..after painting, detailing & making the mount.. ..mounted in position on the coaming.. ..as this was now ready, I stopped working on the canopy and got on with fixing the coaming & windshield so I could start fairing in the sections & skin the fuselage - here the process has started at the front, and now P38 filler added at the back.. ..I forgot to take pics of the shaping work, so next up is one of the fuselage skins at the rear.. I made up a template sheet as it has to fit on three edges, and once I had that I could translate the drawing rivet & hatch positions to the sheet.. ..the finished sheet, with a bit of tube fitted at the rear for the mounting where I think a jig fits the fuselage for balancing & gun alignment etc.. ..and the sheet fitted with the hatches & upper skin.. ..as the airframe is now virtually complete in shape terms after 18 months, I couldn't resist an assembly shot to see how things were shaping up.. ..thats it for now TTFN Peter
  12. evening folks as it's a Bank Holiday here, I had a bit more time at the bench.. the windshield parts were made up and painted... ..then very carefully assembled - I also added the fixed gunsight and mirror.. ..and thankfully the coaming fits nicely - Steve from Model Monkey has kindly 3D printed the gunsight which I think will arrive tomorrow so once I have that I will detail it, fit it and this whole assembly will be added to the airframe.. ..I had to find another part to do and as the glazing was going pretty well (hope I don't speak too soon, it's my nemesis), I decided to start on the side windows... ..started by making a mould profile to make up the PETG in boiling water, pressing it down on foam to adopt the shape.. ..once done, I used the PE frames I made to size the glazing... ..I also had separate PE frames for the front sliding part of these windows so they were also carefully added.. ..then the detailing started, there are lots of very small assemblies in each one, and they are subtely different (or will be) as the top canopy part hinges off one side.. ..another bit I was dreading sorted out, hopefully I can get them all finished without any mistakes like scratches or CA blobs TTFN Peter
  13. evening folks had a few days off, so here we go again.. so, the Instrument Panel coaming - something looking so simple is anything but... - lets take a look.. complex shape that forms to an angular shape around the IP, see those air vents - there are 4 - two at the sides for the side windows, two at the front for the windshield - also there are two handholds, and a big rubber tube / impact strip along the front edge to protect the pilot... ..more on those vents & hand holds.. ..this is version 4 of my vacfrom mould - it needs to fit the IP and fit in the windshield glazing almost touching at all points so has taken a while to get right.. ..I pulled a copy in black plastic for no other reason than it was all I had in the right thickness... all the bits & bobs were fashioned from plastic from the drawings - the vents from card with a strip of litho & rod fittings, the hand holds, plunge moulded... at the back are two holes for a landing gear down light and a reset button.. ..painted bronze green & detailed - the rubber is heat shrink tube, slit, kinked to get a flat and coaxed into shape, the gunsight mount is PE and the two holes have been filled with their bits from my box of watch spares.. ..and dry fitted ..I also made up all the innards for the windshield, including the armoured glass mount (it will be two bits of glass laminated but hopefully will work..) and some inner framing I will cut to fit - the Xtracolour enamel I used is still drying - seems to be 12+ hours so I don't know if it's the levelling thinner I used or what, but I will have to wait until tomorrow to carry on TTFN Peter
  14. 'sup folks just a bit more Mustang ramblings for your entertainment (hopefully :)) ..I made up a new master plug to correct some shortcomings including not leaving overhangs at the back as can be seen sat on the wing - I used one of the pulls to just fill in some of where I have been chopping the fuselage about as I was starting to lose my bearings.. this is simply plumbers ali tape on the cockpit glass and a bit of litho to force the P40 filler into a nice profile of the fuselage.. ..I then used the mould/plug as a basis to just form the windshield panels out of PETG one at a time. The method was to immerse in boiling water and once soft put on a 2 inch thick bit of foam and just press down until it hardened again. Without moving I then scribed the reference of some of the straight parts of the mould so I knew exactly how it sat on the mould.. ..these blobs are soon turned into the panels themselves as can be seen at the bottom - i removed a tiny strip of the protective covering around the edges so I can assemble it, but still protect it - the fact there is virtually no aggressive heat in this process means they will be crystal clear ..sides are on the mould and the other parts coming together... the black sharpie edging means when you assemble it there is a visible trick where the thickness of the plastic just disappears.. ..CA was carefully wicked into joints as it was held on the mould and presto, a windshield... I also formed the rear former from brass around the mould and with a bit of brute force & ignorance.. ..as this bit starts to come together, I need to drop in the instrument panel so I can build up the coaming around it and ultimately the windshield - as such the parts were assembled .... dummy instruments & bits were added to the back to keep it three dimensional.. ..and dry fitted in place... ..I have also started to form the coaming - tricky as it is inside the windshield so needs to almost touch it all the way round, but also be a rigid shape to go around the panel - you might be able to just see it here.. thats it for now, take care y'all TTFN Peter
  15. Hi folks & thank you very much been a while - it's got to a really tough bit of the build... I got the cockpit pod assembled in a jig and got it in the airframe... ..the external sidewalls of the fuselage have also been added & faired in.. ..I wanted to get the rear window area sorted so I started by making a plug for vacforming but once I had a go with my usual dismal success at vacforming PETG (I get distortion etc) I realised the curves are not compound really so I just bent some sheet in boing water and made a slit along the top rear edge so I could pinch it in a bit to get the upper profile.. ..the windows were then set out and the covering removed - I had an etched template I did that matches the framing I also had done as these are really difficult to do freehand.. ..also made the inner skins and the front former which were painted black on the outside & green on the inside.. ..then added to the interior (carefully!) - the seam doesn't matter as it will be covered, and the little metal brace at the back is so far down the fuselage it cannot be seen.. ..there are some gubbins on the roof of this area so these were made up in metal & plastic and wired up.. ..then as I was about to add the assembly and fair it all in, I thought I had better get the front windshield fuselage area done as if there is any sanding, all the dust will get in the rear cockpit and I will never get it out.. ..I had drawings - you can see the windshield drops down each side of the upper curve of the fuselage and actually the armoured glass panel goes right through this area.. ..I made up templates as there is so much three dimensional geometry going on it is really (and I mean really) difficult to fabricate.. ..one shows where the IP coaming is in relation to the windsheild, the long one is just the overall upper profile with a vertical where the rear of the front windshield is.. ..I made up many more templates and plugs for moulding the windshield & coaming - I also spent days trying to figure out why things were not lining up before I realised the top of the fuselage was very lop-sided so the half-round template is to correct that.. ..one of the coaming vacforms - this is wrong but each tester gets me closer... one thing I am struggling with is on many cockpit pics the panel does not look set back very far, but every factory drawing has it set quite deep - it has to be deep as that is where the panel goes in the cockpit pod, but it is a bit of optical trickery I am struggling with.. ..so some overall shots of the mock-up windshield and the rear glazed area - once I get the plug for the windshield I will probably just plunge mould PETG panels in boiling water as this completely preserves the optical clarity and assemble individual panels to make it up.. lots and lots of fettling & thinking to be done in this bit... ..back when I have some meaningful progress TTFN Peter
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