The RV-4 came about as designer Andy Blackburn was after a small electric scale weekend hack. The model is generally accurate in outline but there have been a few minor simplifications made in the interests of easier building and slightly better performance.
The Full size:- The Van’s RV-4 is an American light homebuilt aircraft supplied in kit form by Van’s Aircraft of Aurora, Oregon. It seats two people in a tandem seating configuration with the pilot accommodated in the front seat. The Van’s RV series has become the most popular kit-built aircraft in the world.