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greggles.w

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Posts posted by greggles.w

  1. Hello all, another notch forward, this time it's the tail feathers.

     

    The kit horizontal stabilisers have squared-off joining faces, which do not match the tapering curve of the rear fuselage.  I don't have definitive plans to measure against, but it seems to me the kit parts also have some excess at that end with the intent that they can be ground down to suit ... at least this is what I elected to do.  A little bit of cardboard scaffolding to suspend the parts in place ...

     

    SAI-7 082

     

    ... which allowed for a 'bendy rule' strip nestled into the curve of the junction as above, so an offset line could be marked.  Top left below shows that discrepancy between the squared of part ends & the extent of curve that they need to interface with.  Excess ground off (bottom left) then a thin sheet of styrene rolled into the curve for the fairing, drilling & embedding of brass fixing pins ...

     

    SAI-7 083

     

    After that, back in the jig to fix in place ...

     

    SAI-7 085

     

    A little bit of pressure needed to get the styrene fairing to follow the curves.  There's still a bit of gap filling to be done to finalise the works.  Full disclosure - I suspect these could be more accurately mounted a little further aft, and I think the relative proportions of horizontal to vertical fins may not be true.  However in the absence of definitive detailed drawings I elected to settle for a compromise that utilised the kit parts & best suited my subjective eye.  That cowling & canopy have eaten up my scratchbuild budget for this project!!

     

    All the control surfaces had panel lines re-scribed too.

     

    SAI-7 084

     

    So the list of 'outdoors' tasks remaining is getting very short now!

     

    • Like 7
  2. A most enjoyable & comprehensive read! That said, it is an unfortunate cause-for-pause to bring things to an intermission.  I do understand the sentiment, I dropped & damaged my Auster Autocar fuselage - worked on for many months - just as I was applying what I believed would be the penultimate coat of primer. My reaction was just as yours - back in the box for you!! I have only recently had enough emotional detachment to let me pull it out & start repairs, several months later!


    I have a Dora Wings Vega Gull underway (yes, yes, I know, I know) & have similarly been intrigued & impressed by the kit’s thoughtful parts breakdown. Though I too have tinkered a bit with the intent.

     

    Glad to have belatedly discovered this one, now following along.

     

    ps, not sure if you inflict F’Book on yourself, but if so, then you may be interested in this group …

     

    https://m.facebook.com/groups/1028631820490934/
     

     

     

    • Thanks 1
  3. Thanks David, Ian, Terry - nice to share the madness!

     

    While waiting for putty to cure I made a start on the cockpit, first task being to address the monumentally thick (+2mm!) resin slab sides (top left below).  So I rigged another 'bendy rule' guide thingy from layers of thin & flexible styrene, that fixed with a bit of double-sided tape to the outer fuselage (bottom left below).  This gave a consistent offset thickness which guided scribing down into the top edge.  I then ran a drafting pen nib along this groove to flood it with ink, followed by a light sand across the top to leave guide lines ...

     

    SAI-7 077

     

    Thereafter much grinding & sanding & removing bulk from the inside out, up to & including the thickness of the line until the black disappeared & the cockpit tub sloshed with a resin-dust slurry ...

     

    SAI-7 078

     

    That looks a bit more plausible!  A little nose bridgework done since last update & cowling top plate added - with inset edges to house canopy.  Floor to be added to cover that mess.

     

    Now @Courageous Stuart, as you identified, the principle elements to fill this cockpit tub - now with additional shoulder room - are the pilots!  Meet Giorgio Parodi & Sig. Frassinelli.

     

    SAI-7 079

     

    I've not found much - not even first name - on Frassinelli down the back there, but Parodi up front was just the type of swashbuckling Golden Era sports pilot we like!  Amongst other things he was a founding partner of a motorcycle company in the interwar period, one that took the name of his business partner, a certain Mr (Moto) Guzzi!!  Parodi flew in both world wars, in the latter flying Breda & Stukas, and lived on into the 1960's.

     

    Not so easy to find suitable pilot figures for this era.  We of course need the distinctive flying helmet & goggles, but without all the WWII clutter of integral headphones, oxygen masks, lifejackets etc etc .. even shoulder seatbelt straps seem superfluous for many racers of this period.  After much fruitless searching, my go-to for a pilot of this era are from this range ...

     

    SAI-7 080

     

    Same era, but racing car driver figures, nevertheless suitably dressed & equipped.  They are scaled 1/43 but their dimensions fall within the typical body 'bell curve' for 1/48.

     

    Here just for you Stuart, a very rough & ready mockup, each perched on a tuffet of blue-tac ..

     

    SAI-7 081

     

    hmmm, seems I've a little scratch in the canopy there to deal with later ... sigh!

    • Like 8
  4. On 12/4/2023 at 10:00 PM, ianwau said:

    Do you have access to a Silhoutte/Cricut cutter - as that'd allow some precision masks to be cut (inside and outside)?

    No Ian ....... not yet 😉.  I have thought one of those would be just the thing for custom masks, say for registration lettering ...

     

    Only one piece to report on, so best .. get to the point.

     

    Spinner!

     

    I'm planning an in-flight display, as is my preference, and as with similar past projects I will forgo propeller blades & just present a highly polished (spinning reeeaally fast) spinner.  The Ambrosini seems to have acquired a progression of propellers in it's short active life, including some like so, with the lumps & bumps of an exposed propeller hub ..

     

    SAI-7 076

     

    Those warty things don't work so well with the display intent, so I'm selecting this one-piece prop with spinner ...

     

    SAI-7 075

     

    To fabricate this I laminated up no less than five lengths of evergeen styrene tubes, sleeved by their telescoping internal / external diameters.  Not sure why there is a comprehensive range of tubes available, but not similar range of rod?  At the centre a brass rod, and the tube projections were varied to sleeve into the nose ..

     

    SAI-7 072

     

    Buongiorno Pinocchio!!

     

    SAI-7 073

     

    After lopping the excess off, the brass was slipped into the drill chuck - my 'lathe' - and turned to shape.  The bulk form is now done.  There's a bit of fine surface filling to be done to address little pits & divots at a few of the 'tree rings' where tubes weren't fully welded together.  Also need plug that little hole & bring the tip to a point ...

     

    SAI-7 074

     

    This job shuffled up the task list as it's one which needs shaped in context with the full-length form, fuselage - canopy - nose - spinner.  To this end, again, the vacform buck + styrene draw is most helpful.  I've come to realise that as I next work up the cockpit detail, the opening will be closing up & I'll no longer be able to insert the buck.  So I'm seeking to clear any tasks such as this first ...

    • Like 9
  5. 14 hours ago, Dave Slowbuild said:

    Might I ask what is the “epoxy” that you’ve used as a filler?  Looks like it sands down nicely.

    Hi Dave, it’s Tamiya Epoxy Putty ‘Quick Type’. I’m finding it very user friendly, workable with a little water at hand for whenever it gets a bit sticky. Most times I’ve used it in fairly heavy applications, so I’ve conservatively left it 18 - 24hrs before sanding, so I can’t actually attest to how ‘quick’ this ‘type’ is.  Look for it in the green box seen at back of this earlier image ..

     

    SAI-7 020

     

    • Like 4
    • Thanks 1
  6. G'evening & thanks all for the enthusiasm for the canopy!

     

    On 11/28/2023 at 7:48 PM, ianwau said:

    Bear in mind the 1:1 canopy probably had it's own imperfections - bet they didn't have a 100% dust free environment either! Agree with Derek's comments that the addition of frames etc will cover/distract from the imperfections. Assume for the framing you'll be using that adhesive aluminium tape again?

    That's the plan Ian .. which reminds me I keep forgetting to try a strip of that aluminium tape on a clear PETG offcut to see how the adhesive face looks when seen through the canopy from the other side.  That may change my plans ...

     

    On 11/28/2023 at 7:48 PM, ianwau said:

    You have a clever solution to getting the required fit at rear of canopy.  Looking forward to next update.

    OK, well then, here you go ...

     

    At last post I had anchored the bulkhead (bedhead?) at the back of the cockpit & then applied epoxy behind.  This doubtless could be done more efficiently, or at least more elegantly ... I'm afraid cake frosting has never been my skill!

     

    SAI-7 065

     

    A reminder that back at an earlier stage I had been thinking ahead to this moment, affixing a styrene 'spine' to the raised ridgeline profile, coordinated with the emerging canopy ...

     

    SAI-7 066

     

    ... the theory being to sand back the epoxy until the tope edge of this guide appeared.  Well, as evidenced by the second helping of cake frosting seen below, it turned out that guide was .. misguided!  Too shallow ..

     

    SAI-7 067

     

    As seen above, the canopy buck overlaid with the spare opaque styrene draw stands in nicely for the clear canopy, allowing me to keep that at a safe distance from all things scratchy.

     

    With Ambrosini's lovely sweeping ridgeline profile now formed in 2D elevation, a centreline was drafted for me to work to & protect as the remaining 3D form is extracted from putty ...

     

    SAI-7 068

     

    I elected to start forming the upper 'hump' first.  To define a line to work down to I rigged up this flexible 'bendy rule' from brass rod, eyeballed the desired subtle curve from photos & marked on the surface ...

     

    SAI-7 069

     

    After quite some tentative work the upper hump was pinched in, say 80% done, then tape to flip the guide line ready to finish off the lower portion that merges into the fuselage ...

     

    SAI-7 070

     

    And after yet more tentative work I think that starboard side is now finished in bulk.

     

    SAI-7 071

     

    Here I'm stopping for now.  I'll return to bring the port side up to match when refreshed, hopefully soon.

    • Like 11
  7. On 11/23/2023 at 11:33 PM, AdrianMF said:

    (edit) This all makes me wonder whether having the recessed channel in the canopy actually provided any aerodynamic advantage? It certainly looks good, but...

     

    Agreed.  They were certainly squeezing the most out of the airframe to support that little V8 engine.  Ambrosini carried the canopy treatment over in the first iteration of military prototype, the SAI.107 MM 441.  Unlike the two-seat racer, this was now a single-seat fighter, sat way down the back there, while the canopy was of even greater length due to the extended nose housing uprated V12 motor!  Your surmise seems right Ian, as the reference book states "the aerodynamic advantages of this solution were cancelled by visibility and refraction problems unacceptable for a fighter".  Subsequent prototypes dropped this canopy design. 

     

    SAI.107 MM 441

     

    In the spirit of the above trial & error, here follows my efforts with the canopy at scale.  First, for the record, here's the finish I mentioned last post - possibly the smoothest, shiniest thing I've ever produced!

     

    SAI-7 060

     

    ... but as it turned out, not the cleverest.  The Mr Surfacer had a very limited durability.  In all I managed 3x draws:

    1. Clear PETG direct over the buck.  OK result - thankfully no 'orange peel' finish - but a few imperfections.  Miniscule dust dot distortion, but so fine that they can't be felt on the outside;
    2. White styrene over the buck (as advised @Malc2 / Gordon Stephens). Super smooth external finish, left to cool on buck for next draw;
    3. Clear PETG over the styrene draw.  It didn't fuse together, so that proves the method, but as I had not made allowance for the double layer, it looked a little bloated.

    At this point I removed the styrene ... to find the Mr Surfacer had passed it's limit ...

     

    SAI-7 061

     

    So - be warned, follow me not!

     

    I really don't want to be stuck forever refinishing & refinishing this thing, and am mindful that the form must be compromised a little each time it is reworked.  I also cannot provide a laboratorial dust-free environment, so that could continue to impact results.  So I took the first clear PETG draw, trimmed the excess, gave it a wash, forgave the impurities & have declared it good enough, allowing me to move forward!

     

    SAI-7 062

     

    Without the distraction of framing, it really is a vast - if narrow - canopy!

     

    SAI-7 063

     

    I'm very pleased that I was redirected to delay implementing the framing.  It gives a certain optical consistency, as advised.  Thanks again all!

     

    Fit is satisfyingly sound, sides & forward.  At the rear there's a marked discrepancy, but one which has been anticipated.  With the canopy now formed I was able to use it as a template, carefully tracing with marker onto blue tape fixed to a thick styrene 'bulkhead'.  This now lets me follow through with bulk-out, ready to re-profile the rear fuselage spine.

     

    SAI-7 064

     

    Epoxy curing .. canopy put in a very safe place (really don't want to be sent back on that one!)

    • Like 11
  8. 1 hour ago, Malc2 said:

    Sorry for the long ramble, its all about the details!

    No need apologise Malc - this is valued input, most appreciated that you & all here take the time to assist.

     

    So, from your response:

    - varnish: good to have your feedback triangulate my own musing, shan’t be doing that again;

    - preheating: noted & will be implemented, thanks & thanks Ian too

    - raw timber: this might have been the wisest course, but I muddied things by epoxying the grooves left after removing the micro tubing. I’ve thought one consistent overall finish preferred, hence the coating of Mr White Surfacer (wisdom of this supposition yet to be tested!!)

    - styrene first draw: this is a curious option, but one I might keep up my sleeve in case the above mentioned Mr Surfacer coating proves detrimental. Encasing that in a thin shroud of styrene might be preferable to stripping back!


    A full week of high humidity & rain ahead here, so there will be some delay, but keen to try soonest thereafter…

    • Like 2
  9. Thanks Ian, yes banyan tree roots seem to be my specialty!

     

    On 11/21/2023 at 10:53 PM, ianwau said:

    That extra drilled hole has made all the difference - must remember that one next time I have something similar.  The technique must give some reassurance on how that might work if it was to be part of your vac canopy solution.

    .. yes drilling holes remains an option in reserve, however initial draw shows the PETG pulling close to shape without them.

     

    So after all the valued input here I peeled off all that canopy framing, resolving to add that after.  I left the nickel tube piano hinges in place on top .. recognising that if I removed them I’d need fill & refinish .. this was just avoiding the inevitable as it turned out!

     

    Next I cleaned it up & then sprayed several coats of a high-gloss, one-part polyurethane varnish, supposedly heat resistant. A final polish after several days to harden.

     

    So, time to form ..

     

    53349727551_06176f2123_c.jpg

     

    As mentioned above, the plastic drew into the side scallops satisfactorily, so that was good.  However the top piano hinge tubes resulted in overly bloated bulges .. I guess validating the advice here that framing would have done the same ..

     

    53350047049_0c70855cd3_b.jpg

     

    Of more concern though is an unfortunate finish on the inner surface. It has proven difficult to photograph.  A subtle reversed ‘orange peel’ effect, as though the varnish coat is not as smooth as I believed, or perhaps it reacted with the hot plastic?  This wasn’t a problem - or even perceptible - on the cowl, as it doesn’t carry through to the external face, but this clear piece is less forgiving.

     

    I briefly tried micromesh / polishing it out .. but that quickly proved unworkable.

     

    So I have extracted the tubing; epoxy puttied their absence; sanded back the varnish; brush coated a slather of Mr Surfacer 1500; sanded; sprayed multiple coats of yet more Mr Surfacer; rubbed down with the descending grades of micromesh; & polished with the suite of Tamiya compounds.  I don’t think I’ve ever generated such a smooth finished element before - here’s hoping to goodness it yields a result!  Again I’ll let it sit for a day or so before rigging up the Vacformer again ..

     

    Fingers crossed! 🤞

    • Like 8
  10. Congratulations! What a beauty, lovingly crafted with skill. I’m most impressed.

     

    13 hours ago, Malc2 said:

    all the left over bits at the end that will now go in the bin.

    .. really?? This makes me nervous, I keep all my clutter, jigs & bits, because I’ve proven highly prone to accidents involving gravity!! Heaven forbid, but as insurance for future repairs?

    • Thanks 1
  11. On 8/23/2023 at 3:04 AM, Farmer matt said:

    Cutting the blades to represent a spinning prop is a trick I stole for my Christen Eagle last year, having seen it in @greggles.w s fine build of the LDM Knight Twister.

    He doesn't seem to have been around for a while, but that thread was the catalyst for me joining BM, and also the catalyst for my attempts to build some of my dad's kits and I am very glad I came across it. If you are out there sir, I would be most pleased for you to drop in here.


    Close to 3x months before I took up your kind invitation Matt - what a nerve!  It’s been a year of challenges for my family .. we’ve had our fill of all things medical. However I am finding (needing?) time back at the cutting mat, I’ve a build thread on here again - Ambrosini SAI.7 racer. Not white metal this time, resin. And again, yes, no prop blades needed sir.

     

    Great to see you moving these Chiltons along, & sharing the thread with others like-minded. It’s quite a unique treat to see the work presented against those original masters.

     

    While rearranging the household here to suit changing needs, I had the task of relocating my stash. Those little LDM boxes still surprise with their hefty weight, ‘tis it a gold ingot in there?? Treasure for sure.

    • Like 2
  12. Buongiorno Brits!

     

    Thank you for all the thoughtful input re canopy.  These have led me to reassess, and I have taken the necessary 'one step back' but as yet without reward of 'two steps forward', so until then I'll not be updating on that.  However other work is progressing!

     

    The cowling.  The timber buck was finalised, several coats of varnish with sanding between & polishing after.  A few test draws led to an evolved plinth'n'packer, ply'n'pine arrangement in an attempt to minimise webbing (resulting from the overly tall proportioning) and pull the plastic flush to the shape.  To the latter end, I implemented @AdrianMF advice & drilled a pinhole on top as the plastic wasn't pulling in under the spinner.  That drill hole necessarily goes all the way through the layer-cake, and given the length it actually telescopes up in diameter the further down it goes .. not sure if that actually made a difference!

     

    SAI-7 054

     

    The selected draw was then progressively trimmed back to the buck, which was retained for as long as possible for workable strength as the plastic was drawn quite thin & fragile.  Webbing to the undersides was limited & had actually fused into one, so not too much damage to repair.  Thereafter cowl panels were laminated on & a nose panel joint scribed ...

     

    SAI-7 055

     

    Unavoidably messy that laminating, however that's OK as they are they sanded down as much as I dare to make them as thin & subtle as possible.  With that done the buck was removed & various styrene strips, rods, & tube added for internal reinforcement - a dozen extra pieces! - then nose openings drilled & shaped ...

     

    SAI-7 056

     

    I've delayed fully opening the exhaust slots, until I've resolved how I'm going to execute the exhausts which are to fill said slots.  So until then, this has largely completed the cowling ...

     

    SAI-7 057

     

    SAI-7 058

     

    Oh!  And in parallel, in small increments - matched to my patience with the fiddly tasks - I have progressed the motor which will fill that cowling.  Painting done, 16 pushrods fixed in place & the two halves now joined together.  Considered against the front view above, I think this is not completely time-wasting, some of that will be visible ... surely ...

     

    SAI-7 059

     

    Hope to follow this up with canopy progress soon!

    • Like 11
  13. Tremendous, this is great Malc, you’re doing a splendid presentation of this fine machine.  Gotta say I rather like seeing it unfold with skill, without bearing the pressure or setbacks!

     

    On 10/25/2023 at 4:52 PM, AdrianMF said:

    .and very timely too. I was the only bidder for a CA Atkins white metal kit (1/72) of this aeroplane on EBay. I've paid my fiver, and it's in the post. It is incomplete and I'm awaiting it with a mix of excitement and trepidation.

    Adrian I have had accounts that the CA Atkins kit is the best ‘out of the box’ representation of this machine, closest to available drawings & without the errors of the Merlin or Karaya versions.  It will be interesting to hear what you discover .. 

     

    So, we shall have a 1/72, 48 & 32 .. who’s going to step up for 1/144?

    • Like 1
    • Thanks 1
  14. 18 minutes ago, AdrianMF said:

    I've been told that making female moulds, which is what Falcon and others do, takes a lot more suck than a domestic vac, so I haven't tried it.

    Right, then I’ll leave that method to those few who are as well endowed as @Malc2

     

    19 minutes ago, AdrianMF said:

    I have successfully used shockingly thin material which is surprisingly strong when formed into a canopy shape.

    OK, thanks, so that sounds like a workable strategy, thin stock. I only have 0.5 at present, I’ll see what thinner I can source - presumably worthwhile whichever way I frame it.

    • Like 2
  15. 4 minutes ago, Malc2 said:

    FWIW I would mould a smooth canopy and add the framing to the finished canopy using the alu foil you have.

    And that - thank you - is another option with much appeal! Certainly as the period photos show the framing to be a fairly high shine metal finish …

     

    Your option would cut out the need to replicate metal finish & save on all the masking …

     

    🤔

    • Like 1
  16. 9 minutes ago, ianwau said:

    Their buck would have been perfect if they'd done a female vs male mould (or is it the other way round?) - which is what I think the pro vacformers like Rareplanes/Falcon etc normally do?

    I did briefly contemplate if I ought to switch gender of this thing (?!) & cast then vac as per the professionals .. but then realised that my work to date won’t suit due to the allowance made for plastic over .. if reversed it would be too small all over. So, I’m loathe to start again - forwards it shall be! I think I will trial as you say, and & then if needs be tiny drill holes as per Ian’s advice ..

    • Like 1
  17. 1 hour ago, ianwau said:

    Might I suggest that before sealing/varnishing/polishing that fine work - that you do a test vacform on something 'similar' with the alum tape in place?

    Wise words thank you Ian, yes I ought to ..

     

    1 hour ago, ianwau said:

    Exhibit 1 below is a very crisp canopy buck supplied with the Lifthere!/Aircast Resin 1/72 Ceres kit and THEIR resultant not-nearly-as-crisp vacform canopy.

    How curious - do I understand you right, they supplied you with both? Regardless, your evidence is compelling .. I’m hoping for better than that!

    • Like 1
  18. On 10/13/2023 at 6:09 PM, woody37 said:

    Love the solution to creating an equal pinched area down each side, every day is a learning day!

    Thanks Woody, I do hope it is equal each side when this is done - it's seems ok, but true test will be when it's transparent!

     

    On 10/14/2023 at 3:02 AM, AdrianMF said:

    I'm wondering if you might need a pinhole or two (hidden under the frames) in the buck if the plastic doesn't pull down fully into the grooves before it seals on the bottom edge of the groove. That would provide the means to suck the air out so the plastic can bed down. Hopefully not.

    I am indeed hoping Ian, but reserving the right to implement this if things don't go so well.

     

    On 10/14/2023 at 5:15 AM, Malc2 said:

    FWIW,  I think the canopy will be fine as long as you get it hot and your sucker provides enough, well..... suck.

    I have done sharp internal corners with no problems, but then again I do have a big sucker.......

    Crikey! Talk about add to the 'performance anxiety'!!

     

    OK, so next phase - experimental, so this is sharing the leap into the unknown - canopy framing.  I figured criteria being ever-so-slightly raised, pressure & heat resistant, malleable around curves, adhesive ... & cheap please.  Came up with this stuff from a car parts store ...

     

    SAI-7 051

     

    .. lay a strip onto silicone paper (basically sticker backing paper, sold without the sticker), then printed some parallel guide lines on adhesive label, nice and long to help get the steel rule aligned.  Cutting technique took some trial, arriving at need for sharp blade, not too much pressure, multiple passes, & spinning the paper around frequently so the steel rule applies pressure to the bit to be used, as the exposed bit crinkled & dragged a bit.  Application was manageable.  It's thicker than kitchen foil, closer to the foil around a red wine bottle top, so you need bend it to the curves as much as adhere it.

     

    Happy with the outcome.  Ridge line of the two opening sections had a piano hinge, so for these I used micro tube half embedded & CA glued into the timber, to result in half-round raised detail (will it work, we shall see?).  A bit hard in the images to distinguish from the residual black centreline pen marking.  Also note that one of these frames covers the cedar guide used for earlier bulk shaping.

     

    SAI-7 052

     

    However I see here it seems I muffed-up some setout, as shown below, I think I have the mid-height horizontals a little low (the frames for the little sliding windows etc) ...

     

    SAI-7 053

     

    Luckily these strips can be carefully peeled off without damage to the timber, and can even be repositioned if I don't crease or tear them in the process.  I'll fix that tomorrow hopefully, then I'm thinking I'll seal them in place with an overall spray varnish to the lot (with a polish?) before committing to vacforming.  Getting close now!

     

    • Like 11
  19. On 10/11/2023 at 8:28 PM, Dave Slowbuild said:

    Best of luck! 🤞
    Seriously, I’m fascinated to see how you tackle it.

    Thanks Dave, yes how?? That query kept my mind busy for some time. Here’s the method I arrived at..

    The starting point: here below can be seen the canopy buck extracted, showing the mishmash of stuff underneath that held it together & plugged it firmly in place in the cockpit opening.  Bottom left is a fresh jig of sandwiched boxboard & PVA, with a matching hole to receive the canopy buck ..

     

    53254812729_7d22183e4a_b.jpg

     

    .. like so,

     

    53254462236_f1ee198afa_b.jpg

     

    Note above the end guide profile, with the concave geometry relationship to the stacked card either side. These stacks provide a level ‘shelf’ each side to lay a razor saw blade on ..

     

    53254462246_2bed733c7b_b.jpg

     

    .. delivering the initial longitudinal slice as above, and after protecting the boxboard shelf with some tape, the same principle repeated but using the edge of a flat file ..

     

    53254462221_164a248a4c_b.jpg

     

    .. following the sawcut, progressively opening & deepening a groove, checking as I go against the end guide profile so as not to go too deep.

    That groove then acted as guide to run along sanding sticks with a conveniently curved end, again keeping an eye on the end guide profile ..

     

    53254950885_e7d64a87ef_b.jpg

     

    .. arriving at this sharp-edged concave scallop ..

     

    53254462261_de17965ab1_b.jpg

     

    .. the same jig guided alignment of protective tape, getting ready to knock the top sharp edge off first ..

     

    53254812679_eb8d71e601_b.jpg

     

    .. and then finally address the lower sharp edge, blending it down to the cockpit sill.
    (note allowance made for future vac-plastic thickness)

     

    53254950910_658affcf29_b.jpg

     

    Phew! I declare the bucks ‘shaped’, only a little surface finishing remaining before ready to draw plastic!

    • Like 17
  20. 12 hours ago, 2996 Victor said:

    This is incredible, a modelling masterclass! I'd say you've captured the contours of the nose very well indeed. The wooden bucks are a work of art in themselves - you could display them alongside the finished model.

     

    Cheers!

    Thanks Mark, nice feedback but I must say the most cheering bit is that your confidence that it will be ‘the finished model’!!

     

    5 hours ago, Malc2 said:

    One thing I have learned is that joining the mould pattern along the centre line before starting gives a nice center line to work to that does not disappear no matter how much sanding you do!

    Such an elegantly simple solution, of the kind that makes one think but of course, why did that not ever occur to me?! I will be applying this in future for sure - thanks Malc!

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