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Welcome to RA Cores Home Page.

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Check out our "FAQ" page to get answers for many common questions

Check out our "What's New" page to find out about recent changes and additions

Check out our Show Schedule to see where we will be this season.

This site is mirrored on and our own domain,

Current News

RA Cores Products
Product images
Click image for more information on each product.

EPP Flat Foamie Series

Our 32" Original EPP Yak55 kit.
Our 32" Lightweight Yak55 kit.
Our 22" Mini Yak55 kit.
A review of our kit on RC Groups
Our 32" EPP Extra kit.
Our **NEW** 22" Mini Extra kit.
Our kit of Leadfeather's 3D Delta from RCGroups. (RCGroups discussion thread).

EPP Warbird Series

Our 33" EPP P-51D kit and our 22" Mini P-51D kit. (RCGroups discussion thread).
Our 34" EPP Spitfire kit. (RCGroups discussion thread).
Our 34" EPP ME-109 kit. (RCGroups discussion thread).

Joel "MetroGTI" Dirnberger Designs

EPP BluFO and all the necessary accessories to complete it.
EPP BluFO-XL introduced at Joe Nall Week 2017 and all the necessary accessories to complete it.

R/C Combat Gremlins

Due to production and time constraints we are no longer offering the Almost Ready-to-Cover option for our Gremlin kits. Lead times had stretched out too far recently.

December 2017 was the 25th anniversary of the Gremlin Construction article in the December 1992 R/C Modeler
The Original R/C Combat Gremlin kit.
Our Speed 400 sized Mini Gremlin kit.
         We offer a Mini Completer set including the motor, servos and ESC used in the Mini videos.
Our 48" GremTwin kit as seen in the December 2011 Flying Models and at the 2011 NEAT Fair.
We now offer Graphics for your Gremlins.
A page that lists Hobby Shops that stock our kits
A helpful Gremlin repair hints page
How to cover your Gremlin with 2" colored packing tape
Plans for the Gremlin Stand shown in the pictures. (plans included in the full sized kit instructions)
Plans for the Sliding Tray used with non-mixing radios.
Download a Real Flight Gremlin model created by David Beach
A page of customer supplied Gremlin images
A video showing how to launch a Gremlin (taken from a contest video), You can also see launches in videos on our Gremlin Playlist.

Gremlin Streamer Combat Contest Rules and Info

The contest rules we use (updated to include plain bearing .28 engines)
A PDF file of the forms typically used for a Gremlin Contest.
And the current NERCCA combat contest calendar. (click a past date for the report and pictures)


We have put our instructions up on the web so people can click on the images and see a full sized color image.


Indoor accessories are now available for our EPP foamy friends.
Recommending Beacon Foam-Tac EPP and Depron glue (the only glue we use for building our RTF models), Beacon Foam-Finish filler, smoother, waterproofer, Beacon Hobby Coat protective coating and sealer, and Blenderm hinge tape for building our Flat Foamie Series designs

News, Pictures and Videos

See some of the News and Interviews we have had
Be sure to check out our Product specific YouTube playlists.
A demonstration video of John Glezellis flying one of our 32" EPP Yak55 kits
A demonstration video of Jessie Russell comparing our 32" EPP vs Depron Yak55 kits
A gallery of some of our Customer's Flat Foamie builds

Here's our current Additional Options online order form using Credit Cards and PayPal.

For non-US orders please email us at the address below for us to PayPal invoice you with the actual shipping costs. Thank you.

Creation date: Monday March 6, 1995
Last updated: Sunday November 18, 2018

For more information send email to RA Cores