Thread Tools
Jun 05, 2019, 01:00 PM
Registered User
Bob Snedegar's Avatar
Quote:
Originally Posted by apocalypsedude
A little progress on my Spitfire....
Looks great!
Did you use LW-PLA for the entire airframe? Is it sufficiently rigid for load bearing parts such as the motor mount?
Sign up now
to remove ads between posts
Jun 05, 2019, 01:14 PM
Registered User
Quote:
Originally Posted by Bob Snedegar
Looks great!
Did you use LW-PLA for the entire airframe? Is it sufficiently rigid for load bearing parts such as the motor mount?
The motor mount and the peg for the wing attachment are actually the only parts that are not printed with LW-PLA.
Jun 05, 2019, 06:36 PM
Registered User
atreis's Avatar
Quote:
Originally Posted by farmertom
Nice Looking airplane!
Is there a spray paint that will reduce/reflect the IR from Sunlight? Do you think that will help with the warping from heat?
IR or UV?
UV: https://www.amazon.com/Krylon-ALV144.../dp/B00ETP6MY0
No, UV blocking coatings won't help with heat.

Best way to reduce heat is to reflect as much sunlight as possible. Polished silver, very bright white...
Jun 05, 2019, 07:14 PM
My planes plow into the field
farmertom's Avatar
Quote:
Originally Posted by atreis
IR or UV?
.
IR of course.. I think I read somewhere that there are sprays products that are applied to the underside of roofs that are suppose to reflect IR to keep an attic cooler.. Just thinking out loud.

Here are some sprayed on top of a roof.. second one looks clear.
Maybe something like this https://www.ultimatecoatings.net/
or This https://www.texcote.com/wp-content/u...d_Benefits.pdf
Last edited by farmertom; Jun 05, 2019 at 07:27 PM.
Jun 05, 2019, 07:18 PM
Registered User
atreis's Avatar
I've not heard of a spray for roofs, but who knows.

This stuff is an IR reflector used in roofs/walls:
https://www.amazon.com/RadiantGUARD-...dp/B00EZV1BRG/
At any rate, also notice the color. (There are many others too, such as the silver bubble stuff, but all are silver color aluminized plastic.)
Jun 05, 2019, 07:24 PM
Registered User
Lynxman's Avatar
Thread OP
I tried a high temp PLA yesterday. It was crap. https://orbi-tech.de/shop/3D-Filamen...ural::297.html

Weakest material I have ever tried. Maybe it can work for 3D printed vacuum forming plugs, but
it was useless for thin wall.
Jun 05, 2019, 07:38 PM
My planes plow into the field
farmertom's Avatar
Quote:
Originally Posted by atreis
I've not heard of a spray for roofs, but who knows.
Here are some sprayed on top of a roof.. second one looks clear.
Maybe something like this https://www.ultimatecoatings.net/
or This https://www.texcote.com/wp-content/u...d_Benefits.pdf
Jun 05, 2019, 07:52 PM
Registered User
atreis's Avatar
First one appears to be white. Second is interesting, although the effect is not all that pronounced. (The kind of thing that adds up over many days on a building ... Might not be enough for a plane.)
https://www.texcote.com/reflect-tec/reflect-tec-colors/
Jun 06, 2019, 01:14 AM
Registered User
Bob Snedegar's Avatar
Wondering if a thin layer of LW-PLA would have the flexibility to form an integral hinge - allowing single printed parts for wing/aileron or stab/elevator as on molded foam airframes?
Jun 06, 2019, 01:30 AM
Registered User
Thoemse's Avatar
Quote:
Originally Posted by Lynxman
I tried a high temp PLA yesterday. It was crap. https://orbi-tech.de/shop/3D-Filamen...ural::297.html

Weakest material I have ever tried. Maybe it can work for 3D printed vacuum forming plugs, but
it was useless for thin wall.
I've tried different sorts of HT variations. They are unusable for thinwall printing. Most tend to get soft even sooner. This might be good for annealing but tthin wall does not survive the annealing process.

I lack the time to print atm but LW-PLA + a reson/epoxy coating could be a solution. I have heard that it keeps PLA stablke above the usual temperature where it gets soft.
Jun 06, 2019, 01:49 AM
Registered User
Breitlingwings's Avatar
Quote:
Originally Posted by Lynxman
I tried a high temp PLA yesterday. It was crap. https://orbi-tech.de/shop/3D-Filamen...ural::297.html

Weakest material I have ever tried. Maybe it can work for 3D printed vacuum forming plugs, but
it was useless for thin wall.
I tried the same some time ago for a 3D printed plane poject. It was a complete fail.
Jun 06, 2019, 02:48 AM
Registered User
Thoemse's Avatar
Left: ABS
Right: HT PLA

Tried annealing at 70 deg C (they tell you to use 100 haha).

Jun 06, 2019, 06:00 AM
Registered User
atreis's Avatar
I've actually had some luck with HT PLA, but had to use double walls to get it rigid enough to use for larger parts. That resulted in somewhat higher weight (~ 30%) than single wall normal PLA. I used it for printing Lynxman's larger Hercules, which flew nicely.

BTW - the h. stab that broke during the maiden was single wall. I've not had a chance to fly it again. The field I fly at got wiped out by one of the 14 tornadoes that hit Dayton. (My home got lucky. We had only a flash flood that left a large drift of corn debris on the driveway. Really fun to shovel off, but hey, it could have been a lot worse.)
Jun 06, 2019, 10:13 PM
Registered User
hawaiianspork226's Avatar
Quote:
Originally Posted by Thoemse
Left: ABS
Right: HT PLA

Tried annealing at 70 deg C (they tell you to use 100 haha).

What plane is that?

And which ABS did you use?

-david
Jun 07, 2019, 12:45 AM
Registered User
Thoemse's Avatar
Quote:
Originally Posted by hawaiianspork226
What plane is that?

And which ABS did you use?

-david
It's the nucking futs from our awesome plane designer Lynxman here in the forum.
I've used hobbyking ABS. I got loads of it here because HK had a sale selling these for 6 /kg.

If you want to print singlewall planes in ABS you will have to make sure to have the printer in a housing though.
I am using a delta printer for this.

Sadly the plane was lost due to the wing latch breaking at insane speed. I had doubts about it's strengh before maiden and threw it anyways - not a wise move.


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion LW and GM tissue sources phil alvirez Painting and Finishing Tips 1 Jun 30, 2009 11:01 AM
Question CSM 200 LW gyro instuctions lilpip Mini Helis 1 Jan 17, 2009 10:09 AM
Discussion Heath Midwing covering Litespan or LW tissue dflier Scale Kit/Scratch Built 2 Jan 18, 2008 12:02 AM