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Beatty-Johl BJ-4
 
The BJ-3A appeared in 1968 and this was followed by the BJ-4, two of which were built for the 1970 World Championships, in which the existing BJ-3 wings were married to a new fuselage and tail unit, the T-tail being replaced with a taller fin and rudder and an all-flying tailplane repositioned on the fuselage behind the rudder.
 
 
 
 
 


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