Sorry about the delay in answering seems time flies faster than I am able to count !!! The plane in the original box has the actual blue colored blue prints and that has not been done for a lot of years. There is a pair of possibly 1.5 oz gas tanks that are made to fit the engine mounts so that leads me to believe that it was originally a glow motor set on it. The plane as far as I can tell is late 40's to mid 50's manufacture as I can find no mention of the eureka hobby anywhere. The box has a actual photo of the completed model in black and white taped to the front as the draw for the plane. If you go to the address at photo bucket I posted a lot of pics and it does not look like it was set up for RC but set up for control line. The engine cowls are both very thin aluminum that is polished. If you look closely at the inside pics of the wing and fuse there is 2 decals with the hobby shop logo. I think that it would be best to convert it to electric as that would allow the cowl's to not be cut up to fit the motors and exhaust systems. I thought I had it sold but have not heard back in a while from the individual and have been looking at it hanging and thinking more and more on how to mod this beauty to fly great on electrics! I really have not planed on doing much to it this winter as i am going to be building a Mud Duck Sport to tow banners with at racing events where I work on Fridays as the announcer. I might be tempted to trade it for a gas 20 or 30cc motor but that remains to be seen.
Larry