02/28/2014. Remarks by Johan Visschedijk: "The Model 7RH (RH for Rich Hoffman) was a two-seat sport homebuilt aircraft of R.J. Hoffman and W.K. Rich and was completed in 2001. The aircraft was described as a homebuilt Aeronca Model 7 Champ and it was fitted with an 125 hp Franklin 4A-235 engine."