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trying2fly
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Cheers
Thought as much
Minwax (mineral) OK to use on bare foam?
Does it do any good/harm??
Or do I modpodge it?

Rounded edges vs knife edge I think is more a personal preference with our foam models. In the world of aviation when considerations of hypersonic and subsonic speeds are dealt with the form becomes more noteworthy. Some people like miniwax polyurethane as a painted thin undercoat when painting. Using the polyurethane allows one to use just about any spray paint you desire without worrying about dissolving the foam. I personally like it with dollar tree foam . Removing the paper from the foam makes the foam pretty floppy and bends easily and has a tendency to warp if you set the model at an awkward angle. The miniwax urethane stiffens the foam, water proofs it, and makes the painting easy and less stressful. You remove the paper and it lightens the model...placing a thin coat of urethane does not seem to make the craft as heavy as it was with the paper. Again, just my observations and no rule of thumb seems to prevail. chas
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Wildthing
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Rounded edges vs knife edge I think is more a personal preference with our foam models. In the world of aviation when considerations of hypersonic and subsonic speeds are dealt with the form becomes more noteworthy. Some people like miniwax polyurethane as a painted thin undercoat when painting. Using the polyurethane allows one to use just about any spray paint you desire without worrying about dissolving the foam. I personally like it with dollar tree foam . Removing the paper from the foam makes the foam pretty floppy and bends easily and has a tendency to warp if you set the model at an awkward angle. The miniwax urethane stiffens the foam, water proofs it, and makes the painting easy and less stressful. You remove the paper and it lightens the model...placing a thin coat of urethane does not seem to make the craft as heavy as it was with the paper. Again, just my observations and no rule of thumb seems to prevail. chas

If you are taking the paper off and then doing the minwax you probably end up very close to the same weight.
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trying2fly
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If you are taking the paper off and then doing the minwax you probably end up very close to the same weight.

You are correct....I weighed a wing for a "NOOB" after removing the paper and putting a coat of MiNIWAX polyurethane,,,I was only about 20% lighter. I guess the + is being able to spray any kind of paint you desire and it not affecting the foam. Also the lines are crisper and the colors are slightly more vibrant than foam alone. I usually leave the paper on because I am lazy and coat the paper with colored packing tape! ha! chas
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omar182114
I use two types of foamboard dollar Tree and Staple's
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I can`t help you with the foam question I haven`t used dollartree(Adams) or minwax.
Malukk, Homey666 and e3-scott have used those and could tell you as well others.


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http://www.youtube.com/user/Omar142118
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Sidewayskiwi
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I've always had the best luck using 5 minute epoxy for motor mounts, control horns, reinforcement in the foam, takes a bit longer to cure, but dries very strong and is stiffer and more heat resistant than hot glue in my experience. When I put my motor mounts on, I will spread the epoxy on the foam, get the mount set square and then "spot weld" in a couple of spots with hot glue where the mount meets the foam so that it holds in place while the epoxy cures.

Cheers,

Scott

Ironically
A world apart
That's exactly how I do it now
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Sidewayskiwi
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I use two types of foamboard dollar Tree and Staple's

Sent from my SAMSUNG-SM-N920A using Tapatalk

I either double up the DTF on profiles or make a double on the centre span for my plastic mounts
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e3_Scott
Hi Everyone -

@Sidewayskiwi , hope it is OK that I post this in your thread, I didn't want to start yet another thread about KFs just for this video

I know that there are at times confusion and controversy about KF airfoils on park jets, so hopefully I'm not adding to that, but I shot this video about how I go through step by step to size, draw and install KF airfoils on my park jets. Some of the discussion in this video is based on my flying style, preference and environment, obviously your preferences and experiences may differ. My feedback on testing KF size (ie percentage of KF area of the wing) took place over a couple of years testing NAMC planes and others, so take that for what it is worth. KFs are certainly inexpensive to experiment with, so I encourage anyone to do their own testing.

Here is the video.


So you don't have to watch on YouTube to get the links, to the blog posts discussed, here they are.

http://scottsparkjetblog.blogspot.com/2018/01/which-park-jet-for-me-part-11-kf-kline.html

http://scottsparkjetblog.blogspot.com/2018/07/table-talk-how-i-make-kf4-airfoils-for.html

Cheers,

Scott
Park Jet noise...the "other" sound of freedom😎
#ParkJetnoise #ParkJetpilot
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Sidewayskiwi
Yea she's all good mate
All help welcome
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Sidewayskiwi
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Hi Everyone -

@Sidewayskiwi , hope it is OK that I post this in your thread, I didn't want to start yet another thread about KFs just for this video

I know that there are at times confusion and controversy about KF airfoils on park jets, so hopefully I'm not adding to that, but I shot this video about how I go through step by step to size, draw and install KF airfoils on my park jets. Some of the discussion in this video is based on my flying style, preference and environment, obviously your preferences and experiences may differ. My feedback on testing KF size (ie percentage of KF area of the wing) took place over a couple of years testing NAMC planes and others, so take that for what it is worth. KFs are certainly inexpensive to experiment with, so I encourage anyone to do their own testing.

Here is the video.


So you don't have to watch on YouTube to get the links, to the blog posts discussed, here they are.

http://scottsparkjetblog.blogspot.com/2018/01/which-park-jet-for-me-part-11-kf-kline.html

http://scottsparkjetblog.blogspot.com/2018/07/table-talk-how-i-make-kf4-airfoils-for.html

Cheers,

Scott

Hey hadn't thought of spray adhesive for KF's been using my craft super glue to do it
There's some more weight saving cheers
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