| Volume | Year | Month | Page | In/Out-Door | Subject | Class | Author-Designer | Model Name/ Article Title | Article Description | |
| XXIV No 4 | 1990 | April | 3 | Out | Rear Motor Anchor | Rubber | Jim O'Reilly | Jake Kroeker's Rear Motor Anchor Reinforcement | Design for a rear motor reinforcement; Wakefield in this case | |
| XXIV No 4 | 1990 | April | 4 | In | Site dwg of the Mini Dome | Two page plan & profile dwgs of East Tennessee State University dome | ||||
| XXIV No 4 | 1990 | April | 7 | In | New Event | E-33 | E-33 | Summary of 2 1987 articles by H Phillips + proposed new class rules | ||
| XXIV No 4 | 1990 | April | 8 | Out | Plan | Flying Wing | R Cizek | Sova (Owl) | Two towline gliders, both flying wings, from 1949-50 | |
| XXIV No 4 | 1990 | April | 10 | Out | FAI contest results | FAI | Lee Hines | Max Men FAI International | Max Men Feb 17-18 results @ Lost Hills | |
| XXIV No 4 | 1990 | April | 12 | Out | Basically .049 Engines performance improvements | TD .049 | Harlan I. Halsey | Increased RPM yes, But Increased Power too? | An article on getting better performance through experimenting with different prop combinations for your engine. | |
| XXIV No 4 | 1990 | April | 13 | Out | Events, unofficial | Nationals | NFFS/USOC Unofficial Events | Unofficial events to be held @ Nationals in Oct. | ||
| XXIV No 4 | 1990 | April | 15 | In/Out | Club Profile | Brainbusters | Abram Van Dover | Brainbusters FF Club | Freeflight only club profile; Hampton VA | |