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1:32 Boeing P-8A Poseidon?


Iain

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7 hours ago, Starfighter said:

I definitely have to get my CR-10S dialed in to print ABS or HIPS - whilst I have printed pretty much all the parts I need on my Mono X, this is slowly starting to get expensive... :D

 

HIPS!!!!! H I P S !!!!!  HIPS HIPS HIPS !!!!!  High impact Poly STYRENE !!!!!

H, I, P, S! What have we got??!! The PERFECT printing material for making 32nd plus model aircraft!! Do not mess with ABS !! 

 

Am I getting boring? Good!!  Use HIPS. Please!!!!!

 

Tim

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I think Tim's being a little too subtle there...  :lol:

 

I'm loving HIPS as a print medium - and getting superb results now with the printer settings all dialed in, a PEI bed and the enclosure.

 

The material is absolutely perfect for our purposes - but it is sensitive to temperatures - both printer and ambient.

 

Inside the enclosure it's mid 30's deg. C (90's F) whilst printing - and I've learned to let everything cool very slowly to room temperature, before opening the enclosure and removing new parts from the bed.

 

I now have a suitable thermometer tie-wrapped to the inside of the enclosure frame.

 

But, yeah, wot Tim said...  B)

 

The new front end is all printed now - have just taken some photos with my mobile - will try and post later.

 

To say I'm a little chuffed with what I now see in front of me would be an understatement - but then I've always been a child at heart!  ;)

 

Iain

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OK - latest parts:

 

48b427_c44fa347f8b948e48b1b98a0ecb48781~

 

Ignore the surface marks - that was me whipping over some of the parts with some wet and dry paper - surfaces are actually really good straight off the printer - but will take some surface prep to smooth out the layer lines.

 

These are easier to sand off than ABS prints...

 

I mentioned that I was pleased with the PEI bed - and print settings - no shrinkage and perfectly flat base surfaces (any curves on straight edges are camera distortion on the wide-angle lens):

 

48b427_b72e0e9a64984c7a937b8c850848c8f4~

 

48b427_4e877b1dd720462fb7bfb5ec154a1653~

 

The horizontal cuts are in line with the interior floor - I might cut a floor section over the weekend in 80 thou styrene sheet.

 

This should make doing an interior a lot easier - with the trade off that more filling and sanding will be needed on the outside of the fuselage.

 

Back in a mo...

 

Iain

 

 

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Looks great!

 

Here's the progress on mine, not meaning to hijak your thread, am just sharing it with kit boxes in the background to give another perspective on the sheer size of this monster!  It's nice to have been able to get this printing while doing a total reorg of my basement.. next project, finding the best chemical to remove stubborn carpet tape adhesive from the tile! 

 

The print isn't nearly as clean as your project due to a few factors both environmental and user error, and I ended up with a lot of Z wobble on the wing parts which just finished printing half an hour ago.

 

 

 

eJKmNnA.jpg

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Item the next...

 

Forward lower fuselage - with the area around the nose gear bay cut out ready to add a suitable bay at some point further along the build:

 

48b427_152d0c0086324ea7936edabd5adbb869~

 

Ready to add to the section behind. Like the gear bay area, I've cut out the top of the well for the retractable MX-20HD electro-optical/infrared sensor turret.

 

An opening for this was already on the CAD model - but was capped off - and caused a previous print to fail. Opening it up allowed me to run tree supports in from either side of the part to support higher print layers:

 

48b427_09f761ae398244fda5c7c134e8a471e8~

 

Fit of parts is generally, excellent:

 

48b427_17027bf19f80407a9ddfdff095c116c1~

 

48b427_96b3f8a0349240b08f1044c673964ff7~

 

Back shortly with some more...

 

Iain

 

 

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2 minutes ago, seiran01 said:

Here's the progress on mine, not meaning to hijak your thread, am just sharing it with kit boxes in the background to give another perspective on the sheer size of this monster!

 

That's brilliant Mike! :thumbsup:

 

Great to see it with a wing on - I think it looks really good.

 

Wings are next for me to look at - going to see if I can thin the trailing edges on the .stl files before I slice/print - and probably remove the control surfaces.

 

It's fun being just slightly mad, isn't it!  :)

 

Iain

 

 

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Upper forward fuselage - with side observation windows and main entry door cut out from the CAD model:

 

48b427_5258508e69fe4ef88b765509318d7896~

 

And with the cockpit section.

 

This, like the other pieces, is double-skinned - but with no infill in-between - so I can easily strip down to a thinner skin and cut out the areas to be glazed.

 

Printed in grey HIPS to make things easier with regards to colours and window fitting:

 

48b427_50e7150795ec4073931c825d683a86d4~

 

Obviously, these parts go down to floor level - which should simplify things later.

 

Hollow nose cone:

 

48b427_7aff55c624de41fe8e4ff5ee45a2ce96~

 

And the front end taped up:

 

48b427_78a9aa9aea18481d86b2a5d357f5ee64~

 

Hopefully you can see the madness in my method, or something like that!  ;)

 

Iain

 

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And behold, Bob's your confused metaphor...

 

Or, this is where we're at this evening.

 

61cm/24 inch rule for size:

 

48b427_ed75b4eac8f040c6a5dd98ab5e0ecb8a~

 

48b427_8d8443c148534328a582bd3fc2c8aa91~

 

48b427_ba6e9d0629ba4f2490b0cf3f764a4cc6~

 

48b427_8ae508e0de3b4015a13f069269c6733d~

 

And the tail fin joints have been sanded smooth:

 

48b427_92491aaa883d49f09b24cc4e42002c61~

 

More when there's more, I need to go and lie down in a darkened room!  ;)

 

Iain

 

 

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I've used about 2kg of 1.75mm HIPS filament in total so far - including test pieces/failures and supports.

 

I managed to get 18 x 1kg rolls from a company in Germany, via Amazon before Christmas, for an extremely reasonable £12.99 per 1kg roll - so cost at those prices about £26 so far.

 

And they are a variety of bright colours - will all look the same under paint!  :)

 

However, that source has now dried up.

 

Just checked and probably around £20 - £25 per 1kg roll now - so still under £50.

 

Expect roughly another 2kg in filament for engines/wings etc..

 

Then there will be the costs of the Mini 4k resin printer resin - £33 per kg on last order.

 

That should give an idea on materials costs - not cheap, but then not hugely expensive either, especially given the size.

 

However - there's the costs for the 3D model .stl file, printers, enclosure, special print bed, electricity and wear and tear to add to that.

 

Hope that helps...

 

Iain

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