RA Cores Flat Foamie Series

Over the last couple of years we have been involved in local indoor flying and have built several indoor planes from plans on the internet. We have also started to carry Depron and EPP foams to supply to the local fliers for them to build them as well. This winter we are beginning to offer full laser cut kits for various designs. The first of those designs is our interpretation of the Leadfeather Yak55 from rcgroups.

Painted versions now shipping
The Yak Rainbow

Click to Enlarge

An online version of our illustrated instructions with "click to enlarge" color images
EPP or Depron

Showing all sides of the paint job on our painted kits. (actual plane in flight extracted from video)
Click to View John Glezellis flying Scott's Depron Yak55 Video on YouTube	Click to View a video of Jessie Russell comparing our 32" EPP vs Depron Yak55 kits on YouTube

There is a discussion thread on RCGroups about these kits and giving building and setup hints people have discovered. It's a great place to ask questions about them.

We are offering the following three versions:

(Please note that painted planes can take about a week to ship as we don't stock all colors all the time but will do them as needed)

32" 9mm 1.3# EPP Version

This is the typical version of the plane flown. It has the light weight and great handling characteristics and yet the EPP foam gives it some resilience to the bumps and less than perfect landings seen when learning new maneuvers. It is fully capable of 3D maneuvers and can be flown indoors or outdoors and yet can be toned down to be grown with and into. This is not a self-righting trainer airplane but it is a great option for learning more advanced tricks and a fun companion indoors over the winter that will move outdoors with you in spring.

Watch the videos above

32" 6mm Depron Version

This is the more advanced version of the plane. It has the light weight and crispness that Depron construction provides to further polish your 3D maneuvers. Like it's EPP siblings, this plane can be flown indoors or outdoors but it is a lot less forgiving to the typical bumps seen while learning. Repairs are easy with foam safe CA or tape.

Videos: 1) Jessie flies the Depron version

Lightweight 32" 6mm 1.3# EPP Version

This version uses 6mm EPP foam is lighter than our 9mm EPP version and has floaty flight characteristics. The airframe builds about 25 grams lighter which in turn allows you to use a lighter motor (we used a 17g pancake style motor in our videos) and 350mah 2S batteries for an overall reduction of about 40-50 grams in flying weight. Lighter flies better. it is a whole different plane even though the parts are all the exact same layout. The carbon stiffens the wing and the plane has good characteristics. The EPP is forgiving but the thinner foam isn't as tolerant to bumps as it's 9mm sibling. This is a fun option for intermediate 3D practice indoors.

Videos: 1) Bob flying it. 2) Eric flying it. 3) I even had some fun with it.

Completer Pack

For your one stop shopping experience we offer the motor, servos and ESC needed to finish the kit ready for your battery and receiver. $34.95 each. Quantities Limited. We reserve the right to make equivalent product substitutions when availability requires.

The package currently includes:: hexTronik 24gram Brushless Outrunner 1300kv; Hobbyking SS Series 8-10A ESC; HXT900 9g / 1.6kg / .12sec Micro Servo (qty 1 - Aileron); HXT500 5g / .8kg / .10sec Micro Servo (qty 2 - Rudder & Elevator)

Click to Enlarge

Construction Materials

1.4oz tube of UHU por. The preferred glue for bonding EPP planes. Can be used to make a living EPP hinge. $9.00 per tube. Quantities Limited.

Premium medical tape by 3M which is great for making hinges. Recommended for Depron hinging. $3.50 per roll. Quantities Limited.

Scrollable Customer Image Gallery
(click image to display full size)

Creation date: Thursday November 3, 2011
Last updated: Thursday April 19, 2012

For more information send email to RA Cores