Depron foam profile aircraft have recently become my new obsession.  They're easy to build, parts and pieces are relatively cheap to buy and they're a blast to fly.  It all started when I stumbled upon one man's designs (http://rc.tomhe.net) and I've been on a roll ever since.  I have built and flown several larger (full size and full+) of these planes and they rip through the sky.   They really do look great rolling across the sky and never fail to attract a crowd.

As great as the large ones are to fly I've been on the lookout for one I could throw around my backyard.  Reading through the threads of my favorite build (http://www.rcgroups.com/forums/showthread.php?t=723890) I came across the Mini-F22 and away I went.  Another great build that went together quickly, flew great and gave me tons of fun.  Until.......

All foamies have a single Achilles heal.  They are, well....  they are.....built with foam.  I was flying my Mini-F22 around a local ball field when I came out of a diving turn at full speed and didn't pull up (or couldn't - I'm still claiming that I couldn't but it's a loosing battle) and BAHM!  Nose first into the turf.  If this was a complicated kit build I'd be in tears.  However, being a foamie, I simply picked up the pieces and headed back home.

As you can see in the picture, the nose took the most damage (total loss) and there were lesser amounts of damage in other areas.  From what I've seen most damage on these foamies is from the nose backwards.  Again, not as bad as it may look.  Foamies are resilient.  Heck, I've even seen them fly WITHOUT a nose.  But I digress, they can withstand a lot and even if they do break they're really easy to fix, which is why we're hear after all...

Step 1: Seperate The Good From The Bad

Let's get started and here's what we're going to need.

     *  Marker
     *  Ruler
     *  X-Acto blade or similar

Hint:  Make sure the blade is SHARP.  Scratch that, make sure the blade is NEW!  Nothing is worse than cutting foam with a dull blade.  Dull blades squash and tear the foam.  DO NOT USE DULL BLADES!  Blades dull quicker than you'd think.  At the first sign of pulling the foam - swap out the blade.  Also, keep the knife at a low angle when cutting.  Hold it at 90 degrees when cutting and even a slightly dull blade will pull and rip the foam.  Hold it at a very low angle and the same blade will slice right through the foam.

I'm going to start off by assuming that there is more of the plane to save than there is damaged.  If the spar is damaged or most of the wing area is ripped or crumpled I'll just gut the electronics and throw them into a new build.  If you want to save your plane you have to be sure there's actually enough to save.

First I'll use my ruler and marker to scribe cut lines between the good parts of the plane and the bad parts.  A good  word of wisdom is to always try and mark at an angle to give you more surface area to glue.   More surface area + more glue = stronger bond.

What I did with this plane is mark lines across the top wing, the main spine, both sides and the bottom deck.  I usually don't worry about minor damage, after all it is a foamie.  I just try and cut away what's ripped, torn and crumpled beyond hope. 
WOW!<br> <br> Thank you for bringing your new obsession to the next level - writing about it.&nbsp; This is one of those Instructables you don't see coming.&nbsp; You can't just skim over this one.&nbsp; You have to read every word to find all the Easter eggs packed in.&nbsp; Thanks again!!

About This Instructable


26 favorites


More by CBGjr: How to make a Kayak drainage port Buzzing Headlight Reminder AutoAlert Driveway Alarm to Dakota Alert VS-125 w/ Hacked Wireless Chime
Add instructable to: