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  • Brian Jackson
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13 Jul 2019 11:51 #20238 by Brian Jackson
3D Printing was created by Brian Jackson
Just watched some videos from 3DPrintlabs. I wonder if it would be worth having a go. 3D printers vary a lot in price from a PRUSA i3 at £600+ and a Creality Ender 3 at £200 on eBay. Most of the videos of the printers working are speeded up, I suppose to prevent the watcher from falling asleep or expiring from sheer boredom. With a layer thickness of 0.4mm, it takes over 60 passes to grow the piece being made about an inch, so as entertainment, watching a part being printed doesn't score very highly. What has got me onto this theme is the Freewing MIG 15. None of the sections would be all that big, and several parts could be printed at the same time, so it wouldn't take more than a week to have enough bits to glue up a nice new shiny MIG, or even a Sabre. Observations, comments etc.anyone?

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13 Jul 2019 15:38 - 13 Jul 2019 15:40 #20239 by Decks5712
Replied by Decks5712 on topic 3D Printing
I have a Ender 3 Pro with all the upgrades. I have printed various scale parts for helicopters, friends plus various non rc parts. I even printed a 90mm edf complete which did take a few days. There are many 3D files on the internet even one for a Mig . If you want to know more I’ll be up Cashmore tomorrow.
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13 Jul 2019 19:42 #20241 by Brian Jackson
Replied by Brian Jackson on topic 3D Printing
I've been looking at 3D printers for some time, recently I decided to sell all my I/C powered models, with some loot to play with, I had a look at what printers were on offer. I found one on eBay, did a deal, so soon I'll be able to find out if a downloaded file will actually produce a flying model. I really do hope so!

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14 Jul 2019 06:25 #20244 by Decks5712
Replied by Decks5712 on topic 3D Printing

I've been looking at 3D printers for some time, recently I decided to sell all my I/C powered models, with some loot to play with, I had a look at what printers were on offer. I found one on eBay, did a deal, so soon I'll be able to find out if a downloaded file will actually produce a flying model. I really do hope so!


Depending on your printing bed size you be ok. Be careful on what filament you use. You will need a good strong one which will not attract moisture. Also you will have to adjust your infill settings in your slicer software to make wings etc strong . There are a lot of videos to watch. The edf fan was printed using carbon fibre but did wear out a few print nozzles.

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14 Jul 2019 08:04 #20246 by Brian Jackson
Replied by Brian Jackson on topic 3D Printing
Thanks Alan, that EDF looks impressive, does it give lots of thrust? Bet it sounds good with all those blades. I'll be using PLA to start with, all the models in the videos were made from it. The printer is a Prusa i3 Mk3, a genuine one, not a Chinese clone. These are used by 3DLabprint for their own models, so the parts will fit the bed OK. I'll be using their files and I understand that everything is geared to the Prusa machine, with luck there'll be no need to tweak the software settings or add expensive mods to the printer.

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16 Jul 2019 06:01 #20268 by Brian Jackson
Replied by Brian Jackson on topic 3D Printing
This is a sobering video. The fragility of the model is a bit worrying. The landing was a bit firm, hardly merited the damage.
The big Mig from 3DLabprint takes 85 hours to print and 55 hours to assemble.



I hope to print one of the small warbirds on offer, as a "first go". All take 1Kg of filament or a bit less, and fortunately use the same battery as the Freewing MIG 15. 3530-1100kV motor, 30A ESC and 9" X 6" prop.plus 3 X 9g servos, fortunately all found in the amazing box of goodies that I inadvertently referred to as "junk".

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16 Jul 2019 17:51 #20279 by Dave Bright
Replied by Dave Bright on topic 3D Printing
Is that 55 standard hours or ‘Brian’ hours? :-)

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16 Jul 2019 19:27 #20281 by Brian Jackson
Replied by Brian Jackson on topic 3D Printing
Well, I know I stretched the build of the Freewing MIG 15 a bit, but please bear in mind that I'm a dyed in the wool "trad" builder. I find foam plastic is totally alien, and the skills involved are just a bit difficult to get to grips with. However, my ongoing struggle with the Internet, 3D printing, "slicing" and 3D modelling, will, with luck produce some flyable models. The advantage with 3D printing seems to be that the printer works all day and all night. All you have to do is switch the machine on, wait a bit for the "bed" to warm up, load a spool of suitable filament, instruct the printer to obey the commands from the downloaded programme on the SD card, press "go", then wander off to find something rather more interesting to do, other than watch a printer generate a model layer by 0.1mm layer. I found the video of the 3DLabPrint MIG-15 a bit disturbing, the way the model disintegrated made me think that it was way too fragile. It probably was. The standard filament for model aeroplanes seems to be some stuff called "PLA". A splendid eco-friendly plastic, I assume by " eco-friendly" they mean that if you can't find the model when it lands out, then it will quietly blend into the scenery with no fuss at all..Don't know about the rest of the bits though, LiPos are a bit dangerous if left lying about unattended.

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17 Jul 2019 05:45 #20286 by Decks5712
Replied by Decks5712 on topic 3D Printing
Oh Brian there is a lot to learn about 3d printing, slicer software, slicer settings, layer height. infill. bed temp. hot end temp.etc. Yes you can push print then go to bed but with my experience if bed levelling is out or something not set up correctly you will have a big mess in the morning. Never use PLA on something that that is going to be stressed. This where you will have to modify the slicer settings or you 3d cad drawings to put in supports etc. I have various filaments for different print jobs. You do need to use the correct one for each job, there are so many to choose from.

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17 Jul 2019 08:54 #20287 by Brian Jackson
Replied by Brian Jackson on topic 3D Printing
I can only say that I was a bit worried, but now I've read about the pitfalls for the unwary, I'm a lot more worried than I was!
The PLA filament I intend to use is very strong, for PLA that is. The write up reckons it performs more like ABS. The printed bond is excellent, so no delaminating, and it takes a variety of glues. I'm going to do some test pieces first, I'll try using Acetone as an adhesive to see if the joints are as strong as superglue. I think that this project will be OK. The LabPrint download seems to cover just about everything, and the program has been designed to work straight away with a PRUSA i2 or i3 printer with no modifications other than adjustments to allow for choice of filaments. Whichever way this project turns out, either a pristine "warbird" or a tangled mess, I shall write of the experience so that the members can read, and find some amusement in my jottings. In any case, it'll take minds off the stressful business of taking a model to Cashmoor, and flying it

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