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Author Topic: Simfire  (Read 71 times)

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Simfire
« on: February 09, 2018, 12:52:30 PM »
This is the modelling part of a larger article - that I'm still putting together.

Spent a morning doing pencil sketches, which don’t scan at all well. Also makes you realise how complicated the various bits are.   
Decided it would be a good idea to start on the simple stuff & work fwd, so made a start on the laser detectors.
In theory, they’re a simple box, with a glass front, but then, take a close look at the photo. Notice the rounded corners on the box, the shade at the top. The lens behind the window, the 8 screws around the window, the short stalk on top, the longer stalk below, the mounting arrangement – 91179-091181-1 –

The Box - Decided to use some Evergreen Rectangular tube as the basis – 6.3mm X 9.5mm, cut into 11mm lengths (X4) to form the main box section. To create sides, I cut up some 2mm sheet to fit the ends/sides (X8). Glued 1 piece in each box, to act as support for next operation.
Front Window - Marked edges of windows on front side – inset 1.5mm approx.. Placed in vice, drilled 1mm hole at corners, then drilled line of holes along the window edges. Cut along the lines to separate the window panel – keep this piece.
The Lens - To replicate the lens (the actual lazer detector) I took a clear 5mm LED & cut the top off it, just above the internal metal bits. Keep the top, discard the base. Glue the top to the window panel cut out that you kept. Glue it into the box, centre. Fit the 2nd 2mm sheet end/side.
Rear Overhang - Using more 2mm sheet, cut a 5mm X 11mm piece (X4). Glue it to the upper back of the box. Draw a line down the centre of the 11mm axis. This line forms the most rearward point, much like the bows of a ship. Grind/file/sandpaper the excess plastic to form a point. More plastic needs to be removed, from the top this time. The underside of the overhang is where the system wiring attaches, a mentioned above there are no really good views of this, but – Simfire 5 & 6 are best – 91183-291185-3
The Stalks – round protrusions top & bottom, the top one very short – 1.5mm approx., bottom one longer – 3mm approx., used more Evergreen Rod & Tube Assortment to replicate these, not sure of the exact size. Bottom one needs to nest in the next size up, to provide lateral movement of the detector. The larger sized tube was glued to a 10mm length of 2mm X 2mm rod.
The Shade – a piece of 1.5mm X 2mm rod was cut & glued side on to the box above the window, edges cut & rounded.
Build pics are few & far between – 91187-491189-5– one near complete detector, just missing the window & 3 X boxes, one end & window cut only
91191-6 – at night
91193-791195-891197-9- early morning
Applied some paint - Humbrol 67 – 91199-1091201-1191203-12– late afternoon

More to come next week
Mal
HL M41A3 X 6.5 - NZ M41A1 MERDC, AVRNZE, 3 X Barely touched, T50 ARV WIP - 6 wheel hull, Taigen M41A3
HL M26 - MERDC Dots & HL M26A1
2 X Bruder MB Actros Low Loader - 4 axle, Bruder MAN TGA
Ultimate Soldier 1/18th M113A2 X 2
Spyder Works 1/16th FV101 Scorpion
Ludwig Centurion III

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Re: Simfire
« Reply #1 on: February 12, 2018, 12:30:56 PM »
Bit more done
I mentioned above “The underside of the overhang is where the system wiring attaches “ but didn’t actually progress that – have now, drilled a 1mm hole in each, to attach the individual wires – 91205-0 –
Made more of the ‘stalks’ above, plus mounting rods. The rods are 12mm X 2mm X 2 mm – the individual parts laid out – 91207-1 – also shows the LED cut – parts partially assembled – 91209-291211-3– top stalks added – 91213-4 -  shades cut (11mm X 2mm X 1.5mm rod) – 91215-5 – glued in place – 91217-6 –
End blocks made (2mm sheet) – 91219-791221-8– paint applied – 91223-9 – mostly assembled – 91225-10 – added window sheet – 91227-1191229-12 –

As you will note 3 have an open left side – though I painted the exterior of the end blocks, forgot to paint the interior, which meant I couldn’t seal them up. Still need to apply putty & tidy them up
HL M41A3 X 6.5 - NZ M41A1 MERDC, AVRNZE, 3 X Barely touched, T50 ARV WIP - 6 wheel hull, Taigen M41A3
HL M26 - MERDC Dots & HL M26A1
2 X Bruder MB Actros Low Loader - 4 axle, Bruder MAN TGA
Ultimate Soldier 1/18th M113A2 X 2
Spyder Works 1/16th FV101 Scorpion
Ludwig Centurion III

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Re: Simfire
« Reply #2 on: February 19, 2018, 10:04:39 AM »
Using this photo – 91307-0– I sketched & measured the pyro holder/kill lamp fitting – 91309-1 – as the photo was larger than life, had to scale it back a bit – measurements A – I bottom left translated at bottom right – 66% reduction.
As I don’t have pics of the RHS side of the fitting, I had to ‘wing it’, but mostly based on the Cent mounted version – 91311-2–  with pyro smoke bomb fitted - 91313-3 -
The photo of this particular M41 is a bit unusual as it shows that the pintle extension, normally seen on the forward outer pintle, is mounted on top of the rear pintle – it’s the green extn – the lower pintle is brown, while there are several photos of this, they all appear to have been taken in just this photo session.
Had a couple of serendipitous moments with this build – I was looking for a thick round piece of sprue to add detail below the pyro holder & checked out the Challenger sprues to see if they were sufficiently thick – they weren’t, but noticed that the Chally sprue has a Beacon Lamp on it, the down side, being that its solid plastic, so not a good representation. Thought I might be able to take a piece of clear rectangular acrylic & shape it into a round cylinder, when I noticed a length of 6mm light gathering yellow rod which I got a while back for a non tank project – 91315-4
Cut the top off the beacon, cut a length of the yellow rod to replace it, and bevelled the top edge – 91317-5 –
You’ll note that some Simfire installations had the rounded top beacon, while other ones have the ‘square’ topped version.

Had thoughts about adding an SMD LED to the beacon base, but drilling a hole in the base was difficult – hard to stop the base revolving with the drill, so ended up with just a depression, rather than a hole – 91319-6 – placed the yellow rod on top – 91321-7 – looked ok, but…. Then had the idea of adding a reflector, got some aluminium foil & the office 2 hole punch – a couple of discs later – 91323-8 – placed a disc in the depression – 91325-9 – then the yellow rod over it – 91327-10 - looked better. Glued it all in place – 91329-11. This ‘tweak’ to the Chally beacon should work for making reflectors too – though using the red rod.

Mal
HL M41A3 X 6.5 - NZ M41A1 MERDC, AVRNZE, 3 X Barely touched, T50 ARV WIP - 6 wheel hull, Taigen M41A3
HL M26 - MERDC Dots & HL M26A1
2 X Bruder MB Actros Low Loader - 4 axle, Bruder MAN TGA
Ultimate Soldier 1/18th M113A2 X 2
Spyder Works 1/16th FV101 Scorpion
Ludwig Centurion III

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Re: Simfire
« Reply #3 on: February 19, 2018, 10:14:51 AM »
Started on the fitting itself, used the rectangular tube that I used on the detector units – 91331-0 – cut a side off the smaller piece & attached it to the larger bit, added an L Angle shelf for the pyro (smoke bomb).
The smaller piece should be flat, but I left an angle on it to improve strength. Added the thick round bit below the shelf.
Cut a length of ally tube to sit the beacon stalk in – 91333-191335-2– then added a short length of styrene tube, for the ally tube to locate into, then with beacon added – 91337-3 – added a piece of L angle to block off the open end – 91339-4 – fitted to the turret – 91341-591343-6– added the bolt detail-  3 holes & 3 hex head bolts – 91345-791347-8 – the fitting looks to be attached to the pintle by 2 U bolts - 91349-9- so made a double one from wire – 91351-10 – added a little more detail – 91353-11 –
Still need to add the retention band for the smoke bomb.

Got some Evergreen L Angle 4.8mm (Part 296) to make the turret mounting brackets for the Detector units. The front most detectors are attached to  the upper L angle that looks to be bolted between  the forward handholds, with a length of 4X2 timber as backing inside the handholds. The rearward detectors look to attach to a pair of short L Angle pieces bolted together either side of the rear turret lifting eye.

To make the 4X2, took some iceblock sticks & glued 2 together with PVA, clamped them together for 48hrs to dry – 91355-12 -  4X2 in 1/16th is 6mm X 3mm approx., so I could get 3 lengths out of a short length (20mm approx.) of iceblock stick – 91357-13 –
Mated the 4X2 & L angle together by drilling 1mm holes in both & adding 1mm Hex Head bolts – 91359-14 – Actually fitting these – the fiddly bit – will come later.

Mal
HL M41A3 X 6.5 - NZ M41A1 MERDC, AVRNZE, 3 X Barely touched, T50 ARV WIP - 6 wheel hull, Taigen M41A3
HL M26 - MERDC Dots & HL M26A1
2 X Bruder MB Actros Low Loader - 4 axle, Bruder MAN TGA
Ultimate Soldier 1/18th M113A2 X 2
Spyder Works 1/16th FV101 Scorpion
Ludwig Centurion III

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Re: Simfire
« Reply #4 on: February 20, 2018, 10:12:40 AM »
Applied some paint to the pyro/Beacon fitting – 91369-091371-1-

Mal
HL M41A3 X 6.5 - NZ M41A1 MERDC, AVRNZE, 3 X Barely touched, T50 ARV WIP - 6 wheel hull, Taigen M41A3
HL M26 - MERDC Dots & HL M26A1
2 X Bruder MB Actros Low Loader - 4 axle, Bruder MAN TGA
Ultimate Soldier 1/18th M113A2 X 2
Spyder Works 1/16th FV101 Scorpion
Ludwig Centurion III