Gyrfalcon (oz10007)

 

Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - plan thumbnail

About this Plan

Gyrfalcon. Free flight sport model. Torp Jr .035 shown.

Quote: "For all mad modellers we've got just what the doctor ordered - a semi-scale 1/2A free-flight that can change to skis at the first sign of winter. Full-size plans make it simple to build! By Dick Ealy.

Like to fly models year round? Then don't let winter weather stop your fun this year. Roll up your sleeves and build this exhibition plane to fly in fair weather or foul - snow or sun. You can make a snow-ski landing gear and switch to wheels when weather permits.

A parachute or balsa bomb can be dropped to thrill audiences, whether they be a few friends or thousands of people at an Air Race or Football Game. Since the plane resembles a military fighter-bomber in action, we have appropriately named it 'Gyrfalcon' - an Arctic bird that catches its quarry on the move.

Our 36 in wingspan free-flight model is powered very nicely by an .035 Torpedo Jr. and makes a realistic appearance due to a smooth take-off and stable flight. The glide is long and flat, resulting in gentle landings. Motors up to .049 may be used, and will result in a faster climbing ship. Now for the construction.

Make the fuselage sides first, using 1/8 in square hard balsa for the longerons and cross-pieces. Use pins to hold parts in place while cement is drying. Remove the sides from the drawing and place them inverted on the top view. Add the 1/8 square cross-pieces A, B, C and D. When the cement has dried, taper the longerons at the rear end on the inner side.

Pull the sides together and cement the rear joint well. Next, place the remaining cross-pieces (E, F, G, H) in position and cement. Make a 1/8 sheet balsa bulk-head for station A. Make the fire-wall from 1/16 thick plywood and drill six 3/32 diameter holes as shown.

Bend up the landing gear from 1/16 diameter steel music wire and attach it to the firewall with 2-56 machine screws, nuts and washers. A stock 'Baby Spitfire' motor mount is also attached to firewall with the same size screws..."

Scan from DBHL, cleanup by theshadow.

ref DBHL-6714.

Direct submission to Outerzone.

Update 27/04/2018: added article, thanks to Gerrit.

Supplementary file notes

Article.

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Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - model pic

Datafile:
  • (oz10007)
    Gyrfalcon
    by Dick Ealy
    from Flying Models
    February 1951 
    37in span
    IC F/F Parasol
    all formers complete :)
    got article :)
  • Submitted: 17/04/2018
    Filesize: 306KB
    Format: • PDFbitmap
    Credit*: DBHL, theshadow

Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - pic 003.jpg
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Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - pic 004.jpg
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Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - pic 005.jpg
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Gyrfalcon (oz10007) by Dick Ealy from Flying Models 1951 - pic 006.jpg
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User comments

I'd like to submit two photos of my Gryfalcon (Plan 10007) that I built in 2010. It was powered by a PAW .033 diesel with throttle and guided with rudder and elevator controls. I built it from the plan included in the Feb '51 FM magazine. I used the term "was" because about 2 years ago I experienced a receiver switch failure after launch. That little PAW would run for more than 10 minutes on the 1/2 oz of fuel in the tank.......never to be seen again. Please see attached photos [more pics 005, 006].
DougWeaver - 22/05/2018
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Scaling

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