AMA Plans Service Showcase
JUMPIN' GEO
Combining strength, rigidity, and response!
In competition, no matter the discipline, equipment is constantly evolving. What wins today may not win tomorrow, but that doesn't mean older designs are no longer viable. A case in point in the modeling world is the Jumpin' Geo by John Hunton and Bill Winter.
This high-performance RC design was developed for competition fun-fly and was published in the November 1991 MA. The Jumpin' Geo features true geodesic wing construction: the ribs interlock at extreme angles, producing an "eggcrate" structure that is extremely rigid and strong — a must for the demanding world of competition fun-fly.
Designed for use with a strong .45-size engine, this 3-pound model features coupled flaps and elevators similar to a CL Stunt (Precision Aerobatics) aircraft. The result is a responsive yet smooth-turning airplane that can be flown precisely through wild gyrations.
Although this design probably isn't the hot ticket for modern fun-fly competition, it makes a great sport model that will never get boring. It is also a prime candidate for conversion to electric power.
Do you want a Jumpin' Geo of your own? Order plans 701C from the AMA Plans Service.
Transcribed from original scans by AI. Minor OCR errors may remain.
