I saw some really sweet looking dynamic slopes planes made with light ply bulkheads and the fuse was a single piece of 3mm corrugated plastic and was wondering if anyone has used it to build a flying wing - I know guys use it for hatch covers and battery boxes - I've got 2 3'x3' sheets leaning against the wall and can't see myself using all of it in my lifetime if I just use it for hatch covers and battery boxes.
Anyone use it for an entire wing ?

I built an entire plane out of 4mm coroplast from a left-over political sign. It's kinda between a delta and conventional wing in shape, and features a mid-motor slot prop and 2mm tip fins.

Coroplast is maybe 3x heavier than foam and the plane is relatively heavy for it's size. Which required a slightly larger motor and 3S vs the 2S my foam deltas use. Accordingly the plane is not at all floaty and flies and sounds like a moderately high powered wing.

Not so much a plane I like, as a plane I built for a purpose. I hike the hills every other day and I throw this delta and a 3D foamy in back. After my hike I fly the foamy if it's calm and the delta if windy. There is no field and while I can hand-catch the 3D, the delta has to land in rough desert brush. The coroplast and slot prop make it up to the task. The weight and high speed give it substantial wind capability.

The small one is actually it's foam brother, but the design is the same. Ignore the bigger one on the left. Yet another variation.

Mugis and SPADs were popular for awhile. They seem to have died off several years ago, but there's still a whole RCG subforum dedicated to building planes from the stuff: https://www.rcgroups.com/spad-simple...e-designs-176/

I messed with it a little myself, but it's awfully heavy and not much fun to work with, and even a nicely finished model tends to look like garbage for some reason.

Mine looks fine -- as good as any of my scratch builds. Except the bottom surface has the original
election graphics on it which I don't know how to remove. So it looks funky.

I build almost exclusively with correx. IMHO it is a highly under-rated material, especially here where a 8'x4' sheet of 2mm costs under US$5. Sadly it has an undeserved reputation for being heavy and ugly. Partly this is because a lot of people try to use 4mm and even 5mm, which is crazy heavy and hard to work with. And because 'traditional' SPADDERS seem to take a perverse pride in making their planes as ugly as possible.

It is very popular for slope gliders in Port Elizabeth, South Africa: See these threads: https://www.rcgroups.com/forums/show...-Scratch-build and https://www.rcgroups.com/forums/show...190-free-plans!

I've built several correx wings, the later versions of which fly great and look pretty neat too. See this thread: https://www.rcgroups.com/forums/show...tor-WITH-PLANS

Browse through this thread to get an idea of the variety of correx builds: https://www.rcgroups.com/forums/show...-P-A-Ds/page54

Finally, here is a thread that pushes the boundaries a bit on construction techniques: https://www.rcgroups.com/forums/show...and-techniques

The trick is to use 2mm as much as possible (the slopers use 2mm for the wings and 3mm for the fuselages, but I use only 2mm). Most of my planes weigh less than the same sized and spec'ed bought foamie, but are way, way tougher.

You're lucky if you have easy access to 2mm. I have 4mm repurposed signs and new 4mm in the stores. Anything else needs to be shipped. That's a non-starter.

Those migs are sweet ! And they seem to slope nicely

Thanks for the info - yeah, the Migs really are sweet! That's the thread I read a while back and couldn't find - they really do fly well! I have a couple of large sheets from a past election, I'm going to have to measure it and see how thick it is, I'm thinking 3mm hopefully. I really like the funjet version as well.

Build a Mugi, the original correx wing: http://www.mugi.co.uk/evo_plans.php

First that comes to mind:

http://www.rcsail.com/article_beetle.htm

Originally Posted by joe_crash

I really like the funjet version as well.

Originally Posted by Granted

Build a Mugi, the original correx wing: http://www.mugi.co.uk/evo_plans.php

I recently built my 4th Mugi, including all the improvements and techniques I've accumulated over the years. I soon binned it in favour of some changes to my funjet. Why? Mugis seem to be temperamental beasts. Some fly great right away, others seem to take some time (and damage) to get 'into a groove'. Mostly I think this has to do with having the CG slightly far back, and having twists in the wings. Either way, this last one did not feel like it was going to be a winner.

So instead I tried some new wing tips on my funjet and now it really is exactly the plane it was intended to be. Some time back the Mugi guys were working on something they called the 'Mugi Scramjet'. It was supposed to be a bit tamer than the Mugi Evo, yet still have a decent speed range. However, Morgan moved on to real flying and Life before getting it done and sadly has removed the Scramjet pictures and discussions from the Mugi website.

The Funjet was my attempt to get a correx wing to do what the Scramjet was intended to do - fly predictably and be better behaved than the Evo. The construction is a little more involved, but still simple. I can update the plans if you are interested in building one. Should work with 2mm or 3mm (could also be scaled up for 3mm). The one pictured is powered by a little Emax 2228 rewound to 1800KV with a 7x6 and 1800mAh lipo. Will easily handle the normal 2826 2200KV parkjet motor.

When I get home I am going to start on a simple swept wing. Not sure if it will have more drag then typical swept wing with more sweep and higher aspect but I want something for high speed flying and easy to build with the battery further back then most swept wings so this is the compromise I am planning on trying.

Later Andrew k