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. Now shipping, our 34" EPP Spitfire kit and coming soon, our kit of Leadfeather's 3D Delta from RCGroups.

Painted versions now shipping

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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 9 year old Evan flying his Dad's Yak55 on YouTube	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)

We have been taking a limited number of Bind and Fly Yak55s to area shows for sale. Please email us for color availability and to reserve yours and check our show schedule to see where we will be next. We are sorry but these are not available for shipment due to dimensional weight costs.

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.

The 9mm EPP Yak55 YouTube video playlist.

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.

The 6mm Depron Yak55 YouTube video playlist.

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.

The 6mm EPP Lightweight Yak55 YouTube video playlist.

Flat Foamie Warbird Series

34" EPP Spitfire

The Spitfire has always been one of my favorite planes and it never seems to get as much exposure as it deserves with the popularity of P-51 Mustangs as a model subject. We have put the ease of keylocked foam cunstruction and the simplicity of flat foamies into a well performing version of this WWII classic. With our standard completer kit below you can get unlimited vertical performance and the great profile of the elliptical wing of the Spitfire. We have remained true to the outlines of the plane while moving the hingelines to give great control in the air. As with our other models, our Spitfire instructions

are supplied in paper form with the kit but are also available on the website with expanding color pictures of all the steps for clarity.

The EPP Spitfire YouTube video playlist.

This kit uses the Standard 9MM EPP completer below.

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Completer Packs
For your one stop shopping experience we offer the motor, servos and ESC needed to finish the kit ready for your battery and receiver.

Standard 9mm EPP or 6MM Depron completer, $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)

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Lightweight 6mm EPP Completer, $44.95 each. Quantities Limited. We reserve the right to make equivalent product substitutions when availability requires.

The package currently includes:: HobbyKing 2310 Brushless Outrunner 2250KV (17g); TURNIGY Plush 10amp 9gram Speed Controller; HXT900 9g / 1.6kg / .12sec Micro Servo (qty 1 - Aileron); HXT500 5g / .8kg / .10sec Micro Servo (qty 2 - Rudder & Elevator)

Please note that this motor is for 2S battery operation only.
3S will burn it out.

Picture of the Lightweight completer set

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Construction Materials

1.4oz tube of UHU por. The preferred glue for bonding EPP planes. Can be used to make a living EPP hinge. $10.00 per tube. Quantities Limited.

2.0oz bottle of Beacon Foam-Tac. An excellent glue for bonding Carbon Fiber, EPP and Depron planes. Can be used to make a living EPP or Depron hinge. Stays flexible unlike foam safe CA. $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.

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Creation date: Thursday November 3, 2011
Last updated: Thursday April 11, 2013

For more information send email to RA Cores