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Old Apr 28, 2007, 04:38 PM
One eyed Corsair
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Jetscreamer Saab J 29 Tunnan Buildthread

Hi guys !
Here's a new thread about a famous European jet of the early 50's : The SAAB J29 TUNNAN , the "flying barrel".
Once upon a time in the Great North of Europe, lived shy and proud Viking people... They sailed their Drakkars during Middle Ages, and -may be- discovered America before Christofer Colombus... Later, in the middle of the 20th Century, they built nice (and sometimes strange) planes, like the SAAB J 29 Tunnan
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Old Apr 28, 2007, 04:56 PM
One eyed Corsair
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Jetscreamer Sabb J 29 Tunnan Buildthread

Most seriously... This foamy EDF is all from 3mm Depron and is built for the Vasafan 55 and the Jetscreamer from Little Screamers motors. She's 800mm WS (31,49") and 750 mm L (29,5"). Hope she'll be as fast and easy to fly as my TA 183 Huckebein... Of course, i had to change some things on the model, like larger air intake and exhaust to fit the EDF and give it "a good breathe".
Just let's see some pics of the real one :
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Old Apr 28, 2007, 05:10 PM
One eyed Corsair
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Jetscreamer Sabb J 29 Tunnan Buildthread

The Tunnan and Huckebein constructions are very similar, but the J29 has complex curves and needs more work...
The fuselage bottom is built first. 6mm Depron belly formers are glued on a 3 mm basis before glueing 3 mm Depron skin. Do not bend the structure during assembling...
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Old Apr 28, 2007, 05:14 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

On the rear fuselage, glue the half-formers and the EDF access hatch seat, before glueing the 3 mm skin (without bending the fragile structure...)
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Old Apr 28, 2007, 05:22 PM
One eyed Corsair
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Jetscreamer Sabb J 29 Tunnan Buildthread

Start on the rear top fuselage construction when the bottom is ended : 3 mm Depron formers are glued on the other face of the 3 mm Depron basis, before glueing the 3 mm skin. It can be difficult because of tight curves...
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Old Apr 28, 2007, 05:26 PM
One eyed Corsair
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Jetscreamer Sabb J 29 Tunnan Buildthread

The tail cone (with stabilizer and fin seat) is built on the fuselage extremity. Little 3 mm Depron formers are glued on a 3 mm spar, before glueing the 3 mm Depron skin.
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Old Apr 28, 2007, 05:33 PM
One eyed Corsair
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Jetscreamer Sabb J 29 Tunnan Buildthread

Building wings is necessary before ending the fuselage construction. As usual, a "big A spar", made of a sandwich 3mm hard balsa/0,4mm carbon/1,5mm hard balsa, is glued on the intrados 3 mm Depron skin. Then, 3 mm Depron ribs and polyester tracing paper hinges... Before the extrados 3 mm Depron skin and 6 x 6 mm balsa leading edges. Result is a very solid and rigid wing, fit for high speeds
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Old Apr 28, 2007, 05:39 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

Ailerons servos (one for each) are mounted in the wings roots before the wing is definitively glued on its seat. Then, the formers of top forward fuselage and canopy seat are glued...
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Old Apr 28, 2007, 05:43 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

... Just before the 3 mm Depron skin.
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Old Apr 28, 2007, 05:51 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

Canopy seat is strengthen with thin 0,4 mm plywood.
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Old Apr 28, 2007, 05:55 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

Ailerons are out of 6 mm light balsa and fences out of 0,4 mm plywood... Stabilizer is from 6 mm Depron, with 6 x 6 mm hard balsa leading edges (same way for fin) and 6 mm light balsa flap...
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Old Apr 28, 2007, 05:57 PM
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Any possibility to have drawings of your plane?
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Old Apr 28, 2007, 06:02 PM
One eyed Corsair
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Hey, just wait a minute ! Let me end construction before ! Plans'll be downloadable on Parkjets.com, after complete flight tests...
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Old Apr 28, 2007, 06:12 PM
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Jetscreamer Sabb J 29 Tunnan Buildthread

The F1 3 mm Depron former is strengthen with 1,5 mm plywood and the air intake lip is a ring made of 0,5 mm balsa stripes cyano glued around a size (just like i did with the Crusader intake lip...)
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Old Apr 28, 2007, 07:55 PM
EDF rules... :)
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Hi Phillipe,

Another nice start and it is looking very good, I did a solid model of it for a soldi foam build and will get back to it eventually but right now it is on the back burner till my shop is completed. Good luck and I will spectate for a while.

Eric B.
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