Fizzle-bug (oz2956)

 

Fizzle-bug (oz2956) by Ian Dowsett 1955 - plan thumbnail

About this Plan

Fizzle-bug (Fizzlebug). 17in span FF model for Jetex 50B power unit. Model Aircraft, March 1955.

Quote: "Well-known Jetex flyer Ian Dowsett describes his quickly built model with a context performance. Power - 50B unit.

Although of functional outline, Fizzle-bug is a high performance contest model. Building is straightforward. Begin by cutting and sanding the flying surfaces to correct shape, and making fuselage from litnewood or very hard balsa.

Cement the wings at the correct dihedral, then cement the tail unit to the fuselage, also adding the front fuselage fairing. When the wing is set, cement into position, together with the motor pylon.

Give complete model one or two coats of thin dope. No nose weight should be required and flying trim is achieved by bending the trailing edge of the tail plane up or down.

For power flights, use right rudder. First get your glide circle correct and then try short power flights with straight thrust. Model should have a straight climb under power, going into a right-hand glide."

See Andy Sephton's excellent 2015 build thread with pics at https://www.aeromodellers.co.uk/forum/free-flight-models/32010-fizzle-bug-contest-ff-model-for-rapier-rocket

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Fizzle-bug (oz2956) by Ian Dowsett 1955 - model pic

Datafile:

Fizzle-bug (oz2956) by Ian Dowsett 1955 - pic 003.jpg
003.jpg
Fizzle-bug (oz2956) by Ian Dowsett 1955 - pic 004.jpg
004.jpg

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User comments

Hi, I built one of these 65 years ago from an old magazine, intending to fit a Jetex 50B motor but it flew so well from a hand launch that I never got round to powering it. Attached are a couple of photos of my "Nostalgia" build [pics 003, 004]. It is scaled up x 1-1/2 times to cope with the extra weight of a geared 8520 motor, Crossover RX42 receiver with built in brushed ESC, 260 Mah 1S battery, and 2 x 2 gm servos, for rudder and elevator. I made the wing so that it can be slid on the stick fuselage to find the optimuim. Wing and tail surfaces are from a foam dinner plate (similiar to Depron), hence the joins, leading edge is bamboo skewer to provide rigidity. Total weight 70 gms and thrust is 40 gms. It flies beautifully, just like the original. A great tribute to Ian Dowsett. Regards,
Eric - 04/07/2023
So nice to see my father’s design is being flown by other so many years after its design. He’s 91 now and I will show him your efforts.
Gary Dowsett - 09/09/2023
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