Official PayPal Seal
RA Cores sign and logo

Welcome to RA Cores Home Page.

Find us on Social Media
Google+ Instagram
Go To Order Form
Contact Us

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
Product images
Click image for more information on each product.

The CrashCast Posted Monday January 16, 2012, Episode 147 of TheCrashCast contained an impromptu segment on the Gremlin. One of my customers in Australia wrote in and it turns out the host, Mike "Crash" Hancock, is a long time Gremlin pilot and they took a trip down memory lane. Now Crash is going to do a segment on the Mini in March 2012 and hold a contest to give away a kit at the end of the month. He plans on flying a couple of the Minis in the full contact combat sessions at SEFF 2012. In Episode 152 I was interviewed and we rambled on and covered how I got started in the hobby, where the Gremlin came from and what RA Cores has been up to these last 20 years and where we seem to be headed. Be sure to check out his March podcasts with the build log of his Minis and for how to qualify for the Mini Gremlin kit giveaway. Most recently I was interviewed in Episode 216 about the new product releases I have coming out this summer.

Episode 147 An edited copy of the impromptu Gremlin lovefest - 20 minutes
Episode 152 An edited copy of the full interview/history - 60 minutes

Hobby King has interviewed us at Joe Nall, WRAM Show and SEFF. Those interviews can be found in this playlist.
RA Cores Products
R/C Combat Gremlins
December 2017 will be the 25th anniversary of the Gremlin Construction article in R/C Modeler
The Original R/C Combat Gremlin kit.
         The Original R/C Combat Gremlin YouTube video playlist.
Our Speed 400 sized Mini Gremlin kit.
         The Mini Gremlin YouTube video playlist.
         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.
         The GremTwin YouTube video playlist.
We now offer Graphics for your Gremlins.
A page that lists Hobby Shops that stock our kits
EPP Flat Foamie Series
Our EPP Yak55 kits. (including our 22" Mini Yak55 kit)
         A review of our kit on RC Groups
         The 9mm EPP Yak55 YouTube video playlist.
         The 6mm EPP Mini Yak55 YouTube video playlist.
         The 6mm EPP Lightweight Yak55 YouTube video playlist.
Our 34" EPP Spitfire kit. (RCGroups discussion thread).
         The EPP Spitfire YouTube video playlist.
Our 34" EPP ME-109 kit. (RCGroups discussion thread).
         The EPP ME-109 YouTube video playlist.
Our EPP P-51D kit. (RCGroups discussion thread).
         The EPP P-51D YouTube video playlist.
Our kit of Leadfeather's 3D Delta from RCGroups. (RCGroups discussion thread).
Now offering multiple Flat Foamie Series Completer set options including the motor, servos and ESC.
Joel "MetroGTI" Dirnberger Designs
EPP BluFO and all the necessary accessories to complete it.
We have put our instructions up on the web so people can click on the images and see a full sized color image.
A helpful Gremlin repair hints page
How to cover your Gremlin with 2" colored packing tape
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
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
Gremlin Clothing and hats are now available via CafePress hats
Pictures and Videos
Be sure to check out our product playlists linked in the product sections above.
A page of customer supplied Gremlin images
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 video showing how to launch a Gremlin (taken from a contest video), You can also see launches in each video listed above.
A gallery of some of our Customer's Flat Foamie builds
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)

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.

We use a highly accurate, templatefree, computerized cutter using standard coordinates including the results from the Princeton windtunnel tests being done by Dr. Selig and the UIUC Applied Aerodynamics Group.

We have published a couple of articles in R/C Soaring Digest on being a first time contest CD as well as an article on Low cost foam wing cores.

We provide an email discussion group for R/C Combat online and list and subscription information on it can be obtained by sending email to with the word INFO in the body (NOT the subject) of the message. This group is not restricted to Gremlin combat although the initial membership is mostly Gremlin flyers. Building and flying questions are answered here as well as combat techniques.

We also publish an electronic newsletter for the New England R/C Combat Association (NERCCA) which is available in our online archive as well as a current NERCCA contest calendar.

The counter says you're visitor Visit counter since April 9th, 1996

Creation date: Monday March 6, 1995
Last updated: Monday January 16, 2017

For more information send email to RA Cores