Cromwell Mk 4 1:16 scratch build Ludwig kit

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43rdRecceReg
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by 43rdRecceReg »

Dr Phibes wrote:I would just like to say, this has been a fascinating build to follow. Watching this fabulous, and quite uncommon, tank emerge from a few sheets of styrene has been truly riveting (no pun intended). Really excellent work 43rd and a credit to your sizable scale modelling skills. And I agree about the those sprockets, they are almost just too gorgeous to paint (but I think I would, eventually :D ).

As a relative newcomer to RC tanks I did notice the shortfall in British armour in particular (in 1:16 RC at least) so I think it is really a good thing that people like Chris of Ludwig's put so much work into creating these kits and builders/modellers like yourself take the time to show us how to go about creating a stunning tank from them. To be honest I would love to see some WW1 tanks kits (and/or RC tanks) surface too as, at present, there just seems to be next to nothing of the kind in 1:16, RC or otherwise.

Anyway, keep up the great work 43rd, I'm looking forward to seeing how you take this project through to completion :thumbup: :thumbup: :thumbup:
Many thanks, Doc., and to reciprocate, I thoroughly enjoyed the engineering innovations on you old KT rebuild. :thumbup: Like you, when the hobby lured me in, I was also shocked by the non-existence of British armour at the commercial 1/16 model level. :thumbdown: For two years or so, in WW2, Brit armour stood alone against the Germans, Italians (not much competition there, though.. :shh: ), and , of course,the Japanese.
Currently, I'm happily muddling through. Mistakes I've made have not yet been beyond remedy..and the requisite need to question the process is probably beneficial for the old brain matter. That said, more detailed instructions might have helped; but then, the need to improvise..or research, would have been diminished. :think:
Again, like you, I'd like to have a WW1 tank kit to assemble. A Brit Mk IV would meet the need.
Seeing your 'Phibes' handle again makes me smile. I'm sorely tempted to get 'the Abominable Dr Phibes', and 'Dr Phibes Rises again' on DVD, as well as a boxset of Hammer horror flicks!! :P
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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Ad Lav
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by Ad Lav »

Looks good with paint! Nice work!
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Estnische
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by Estnische »

Roy, I've not had any problems using enamel and acrylic when following these rules:

- always leave a week between them to allow the solvent component to gas out, and I include primer coat in this

- don't use enamel over an acrylic base

You could even say use hobby paints only. Other people have still had problems with crazing and yellowing, but if you follow some of the winter Camo painting videos, it relies on the enamel base being fixed below acrylic.
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AlwynTurner
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by AlwynTurner »

Wow 8O 8O 8O . That is looking absolutely brilliant, love all the bolts and fittings, it looks really authentic.

A lot of work has gone in and it shows. Great job.

Alwyn :thumbup: :wave:
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Saladin scratchbuild, Matilda scratchbuild, Churchill scratchbuild, Crusader scratchbuild, M10 Achiĺles scratchbuild, Universal Carrier scratchbuild
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43rdRecceReg
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by 43rdRecceReg »

Many thanks, Adam, Estniche and the modelling demigod, Alwyn :thumbup: The support gives an extra impetus to the project. More than that, the little hints and tips that pop up along the way (e.g. enamels and acrylics...and many more)
also make the job quite educational. :wave: :thumbup:
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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Raminator
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by Raminator »

Making some fantastic progress Roy, it looks sensational. Given how many details you've fabricated yourself, it looks like you've really taken to scratch building like a duck to water. I'm a little surprised that lots of these aren't included in the kit though; what's a turret without a cupola?
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43rdRecceReg
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by 43rdRecceReg »

Raminator wrote:Making some fantastic progress Roy, it looks sensational. Given how many details you've fabricated yourself, it looks like you've really taken to scratch building like a duck to water. I'm a little surprised that lots of these aren't included in the kit though; what's a turret without a cupola?
Thanks, and a good point about the cupola. That said, as a 'basic kit' (so described), it's a fantastic starter into Brit armour. The only way in, currently, in fact :-< and, to be clear, I'm full of admiration for Chris' exceptional kit designing skills, and undeniable enterprise..but maybe absorbing a few hints and tips here from end users might (in the form of feedback) might make the kits even better.. :think:
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

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..and after a wee break, to catch up on things I've been neglecting, it's back to 'work'...and it does feel like a proper job sometimes.
Defence portal glued in place, prior to sanding
Defence portal glued in place, prior to sanding
Finding pics of the Cromwell from above has proved difficult. I have a blueprint, but getting the scale of things right can be tricky, and frustrating (fun too, though.. :shh: ). I need to make an air vent for the upper hull, and fit three periscopes in front of the Turret. Placement ideas I got from this battered Cromwell pic. It's been shot to pieces on the Otterburn firing range, where it's in the company, of Comets, Challengers (WW2), Centurions and more. Sadly, some are barely recognisable now; but the site's worth a ghoulish peek:
http://hmvf.co.uk/forumvb/showthread.ph ... ecks/page3
The hull air vent I had to build in laminate form (three different thicknesses of styrene, bonded together):
Layout of periscopes and air vent
Layout of periscopes and air vent
Cromwell periscopes and air vent.jpg (51.91 KiB) Viewed 3556 times
Layering air vent
Layering air vent
Base for air vent
Base for air vent
Sanding the whole thing into shape..
Working on the overall shape
Working on the overall shape
About ready for fitting and paint
About ready for fitting and paint
Now for the periscopes. Rob (Wibblywobbly of super Comet renown..) supplied me with these. They're an alternative to the three metal ones supplied by Chris. Unfortunately, they're millimetres too big for the Cromwell, so I had to saw them down to size.
Here you can see Comet periscopes above front armour plate
Here you can see Comet periscopes above front armour plate
Exacto saw living up to its name..
Exacto saw living up to its name..
This is what they, and the Air vent look like in place..prior to sanding and finishing.
From another angle..
Glueing Periscopes and Vent in place
Glueing Periscopes and Vent in place
Front almost complete, apart from headlight protectors
Front almost complete, apart from headlight protectors
and an idea of what I was aiming for..coming :wave: shortly
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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43rdRecceReg
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by 43rdRecceReg »

..the inspiration:
Front of the Bovington Cromwell I photographed last year
Front of the Bovington Cromwell I photographed last year
Here you can see an admixture of periscope types. I still have to make some bars to protect the headlights, some handles for the hatches, and inspection panels, as well as some hinges for the Storage bins (that's a tricky one). Apart from all that....phew.. :crazy: the exterior is pretty well complete apart form minor turret details (aerial etc.,) sanding, weathering, and a coat of proper paint: British Olive Drab, not the Yankee Olive Drab she's sporting at present.
Now for the running gear. Having laboured long over this one, I found that 3mm nylon spacers/ bearings were needed on the swingarms. to line them up with the sprockets. Interestingly, the predictive text/ spell checker on this site wants to change 'swingarms' into 'swingers' >:< Damned thing. Certainly not what I'm looking for :haha: :haha:
The wheels supplied as idler wheels are off the Pz IV. Unfortunately, they need a 6mm axle, and the Henntec only has a 4mm. So, the Henntec axle is now redundant.There was no bearing sleeve supplied, and so I had to make my own. I fitted 5mm brass (4mm bore) inside 6mm brass tubing (5mm bore)., and then drilled the Panzer wheels out to a precise 6mm bore (they were slightly under).
Trusty Makita cordless to the rescue..
Trusty Makita cordless to the rescue..
Here you can see the 4mm Henntec axle in place, and the HL Tiger 1 axle I intend to replace it with- along with the brass bearing sleeves.
Parts needed for idler bearing
Parts needed for idler bearing
Assembling bearing prior to cutting
Assembling bearing prior to cutting
Then lining up with wheel to find cutting point..
Checking alignment of idler before cutting
Checking alignment of idler before cutting
Idlers fitted. Note the Henntec axle had no 'stub' on it to hold the bearing in place. Another reason why I modified the Tiger 1 axle to fit.
Idler in place
Idler in place
Now checking the overall alignment of the running gear, before test fitting the PZ IV tracks..
Checking wheel alignment..
Checking wheel alignment..
Next, checking the tracks for clearance:
Testing for clearance..and beginning link count
Testing for clearance..and beginning link count
These PZ IV/ Pz 3 tracks have around 91 links (correct for the real one too), where the Cromwell had around 125 track links per side. Luckily, dear old Forgebear supplied me with enough links to go almost round the Equator once! What a gent :thumbup:
Ah, but what's this new problem. Can my eyes be deceiving me? (Actually, they often do these days.. :haha: ). Those sprocket teeth are asymmetric. When I was screwing all those tiny bolts in, I never noticed that..until now. How can that be? I assumed that this was a precision fitting, and all I had to do was screw it together. Hmmmph. :problem:
The tips of the teeth on one side line up with the middle of the 'trough' of the opposite teeth. The alignment is almost as bad on the left hand sprocket too..
Alignment totally out
Alignment totally out
For the moment, then, these pretty looking sprockets flatter to deceive. Right now, they're useless. :thumbdown: unless i've missed something...Think I'd better have a word with Chris.... :eh:
"Get your facts first, and then you can distort them as much as you please"- Mark Twain.
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tomhugill
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Re: Cromwell Mk 4 1:16 scratch build Ludwig kit

Post by tomhugill »

Ah mr 43rr you didn't read my build thread thoroughly enough! I kid ;) But I have been through this issue. I can't give you the geometric reason but both rings need to be in the correct positions to align properly. What you need to do is unbolt one side and progressively move it along one bolt position until you find the one where it aligns properly. Mine aren't 100% spot on but within a hairs width and all works ok!
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