This film features the build and first trim session of the 44" free-flight rubber-powered Boeing 306-C, a twin-pusher flying wing that was an unbuilt, concept design aircraft by Boeing in 1935. The model was inspired by the paintings of Jared Zichek, and the 21" rubber-powered plan of the Boeing 306-B by Pres Burning.
I was given a 36" rubber-powered model of the single engine version, the 306-B, from the estate of the late Dallas Cornelius. I had intended to fly his beautiful model this summer, to give her some air again, but instead, I became inspired to build my own, opting for a larger twin-pusher version, the 306-C.
Inspiration also came from the Lippisch P-13, rubber-powered design by the late, great Don Srull, whose rib designs were employed for this project.
I wanted to keep this model as clean as possible, so I decided to keep the rubber motor contained within the wing via a sheeted rib box. With only an inch of clearance at the high point of the airfoil, I grew concerned for the ability of the motor to fully unwind without bunching, which could then easily alter the flight path. I needed consistency for these twin motors, so it was decided to go a bit shorter with the rubber, than originally intended. Still, the motor is 3X the hook to peg distance. I also used a 1/2" piece of surgical tubing at the prop hook to act as a spacer, which helped to prevent the rubber from climbing the prop shaft.
The model performed well on its first time out, so I'm excited to see her potential as I reach max winds of 1200 turns. Happy man!!
Filmed with a Canon PowerShot SX20, and an iPhone 11Pro & 14Pro on 5.18.23 in Wawayanda, NY. Music by Ben Linwood & Noam Zaguri via ArtList.
Pres Bruning plan of the 21" Boeing 306-B: hallmanstudio.c...
Photo showing Srull's Lippisch plan & Cornelius's 36" Boeing 306-B: hallmanstudio.c...
Film of Dallas Cornelius's Boeing 306-B in flight: • Rubber-powered Boeing ...
For more info on free-flight rubber-powered models, check these websites:
brooklyn-balsa...
www.easybuiltmo...
www.volareprodu...
www.flyingacesc...
National Free Flight Society - freeflight.org/
Mike Stuart's Flying Scale Models - www.ffscale.co.uk/
www.freeflight...
Flying Aces Club merchandise: www.cafepress....
All profits support Flying Aces Club activities.
Center of Gravity merchandise: www.cafepress....
30 сен 2024
