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VESNA RES Sailplane

Posted by ultralajt on July 11, 2016 at 6:00 AM

 

This spring I start thinking of a new sailplane, that will not be "just another glider", but it should look nice in spirit of "Golden era of gliding".

 

I give her name VESNA after Slavic Goddess of Spring.



 

So, I start with a hand drawn sketch, then CAD drawings and also for the first time I went to 3D model design and extract then parts from it.

All started with idea to build myself a new glider, possible within RES category (Rudder Elevator Spoiler, 2m max wingspan), but not in the spirit of mainstream where mostly large HLG models are build today as RES, but rather a nicely shaped-curved eyecatching nostalgic model!

 

I draw a sketch to pour my vision on the paper and then I start to do computer design in 3D model. It was my first real attempt of 3D design of the sailplane that I also finished by building it.

 

Here are some pictures made while process was on the fly...

Photo above: initial hand drawn sketch of new model.

Photo above: Sketch outined by CAD program and sized to 2 m wingspan.

Photo above: 3D computer design of the structure.

Photo above: 3D structure almost finished

Photo above: making drawings for CNC machine, all white poplar plywood 3mm thick.

What is needed to build this sailplane?

What is needed for building this model beside Short KIT:

 

- Balsa thickness of 1.5mm to cover wing root, torsion nose and fuselage, TE doublers ................ 4 pieces (100x1000mm)

- Balsa 1mm thick for sheeting the tail surfaces and TE doublers.........................2 pieces (100x1000mm)

- Balsa 6mm thick for the leading edges, rudder and fuselage nose .................... 1 pc (100x1000mm)

- Plastic tube of 2mm outer diameter and the associated steel wire 0,8mm .....2 sets

- Transparent covering film .................................................. ....................... 2 meters

- Colored covering film .................................................. ............................... 2.4 meters

- Control surface hinges18x28mm .................................................. .......... 6 pieces

- The guard of the control wire 0,8mm .................................................. .. 4 pieces

- Round magnet round10x1mm .................................................. ............... 1 pair

- Servo extension cord ~ ​​20cm .................................................. .................. 4-6 pcs

- Wing jiuner, steel rod 6mm diameter, L = 165mm ............................. 1 piece

- Carbon strip 3x1mm L = 1000mm .................................................. ........ 4 pieces

** This costs just under € 40, depending on where you purchase .

 

Various material:

 

- Clear adhesive tape for sealing control surfaces and air brake course

- Self-adhesive foil for decoration (white for the inscription, black or blue cabin)

- Metal hook for Hi-start

- The sponge or foam-like material to hold battery and receiver

- Lead ballast approx 200g

- Screw M4 x 40 ............................................. .2 piece

- Screw M3 x 15 ..............................................2 piece

- Nut M4 .................................................. ......... 2 pieces

- Nut M3 .................................................. ......... 2 pieces

- White glue for wood

- Universal adhesive for wood and carbon (Super Glue phatic)

- Masking tape (for fixation of certain elements during glueing)

** This is to be found in any average local hobby shop.

 

Recommended Radio Equipment:

 

Receiver with at least three channels, preferably, 5 or more, because we have more choices for managing air brake (mixes, etc ..). If spoilers are connected to RX by Y-cable, an servo reverser must be purchased for a spoiler . Spoilers can be coupled to the throttle channel, or to flaps (3 position switch..flight modes) or on the slider.

Receiver battery AA size, flat, 800-2700 mAh

Switch on / off (optional)

A receiver battery voltage indicator (optional)

 

Spoiler servomotor ................................ 2 pieces (or equivalent)

Elevator and rudder servomotor ................. 2 pieces (or equivalent)


Proposal for tailoring the film to cover the model:

Legend:

Blue: sheet 60 x 240 cm; white

Red: sheet 60 x 200 cm; transparent



The big day arrived!  I maidened Vesna. She was a bit nose heavy, so yesterday I already remove some nose ballast and test it in the flat field. It was amazing change! Now I am waiting a good day to went on the hill again and fly her.

 

Till then, I can show only videos from her first flights (nose heavy), one from ground camera and another from on board camera.

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There will be a Short KIT for this Sailplane model available soon in my webshop!

Categories: Building modells

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