A-B Astrostar - Free flight power model. Wingspan 67in, wing area 600 sq in.
Quote: "Big brother to the 1/2A Astrostar, this larger 600 sq in version is designed to compete in either the A or B class with a simple engine change. It's already proven itself by winning B Gas at the 1988 US Free Flight Champs.
My original 1/2A Astrostar, designed in 1985, has proven an exceptional performer - it was the 1988 NFFS model of the year in the Small Gas category, and prersently holds two of the Open National records. Given that caliber of airplane, it was just a matter of time before I applied myself to the challenge of enlarging the basic design concept.
I designed the upscaled model to be capable of handling the power output of noth the K&B 3.25 and 3.5 so that I could fly it in either the A or B class with a simple engine change. Hence the name A-B Astrostar.
Because of the significant power output of the two K&B engines, I'd obviously have to make structural changes on the larger Astrostr to avoid wing flutter. Since the model would be covered with Microfilm which has little torsional rigidity..."
Scan from DBHL, cleanup by theshadow.
Direct submission to Outerzone.
Update 12/02/2018: added article, thanks to Pit.
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