1/13 scale Grunau Baby IIb

[Fred]

Hello there,

Here is my new challenge.. Yep, sometimes, on the Retroplane Forum, well, I must shut up and don't take challenges !!  
Vincent had a simple idea... Why not make mini / micro scale models, but the same way as the bigger one ? Let's say, a maximum scale of 1/10 ? Who want to try ?
And that's enough for me to build another glider !  :wink:
Vincent, at the same time, is building a wonderfull Cimbora ! ( http://www.retroplane.net/cimbora/page1.htm )

So, here we go !

First, the scale has been choosen, because of my smallest battery pack... The pack must fit into the second former.. That gave me the scale ! 1/13, that's around 1.20 mtrs wing span...

All the formers :



The pen give the size...

The smallest one :


All the front formers are made with 3mm plywood... Rear ones, are in 2mm balsa.


Taking shape...  



The entire glider is sheeted with 0.4mm plywood, then a coloured varnish is applied (teak).
All surfaces are scale ! The covering is made with Japan Paper and a mix of water and white glue (around 50/50)

Only 2 servos (9grs) as the glider only have rudder / elevator functions.. We will see later... And it's not a big job to make a wing with ailerons...



Nice eh ?!  :wink:  

More to come !!

And a bit more pictures here :
http://www.gliderireland.net/minigrunau.htm

[Alan_Perse]

Man, that went together quick. Cool       .

[Fred]

Well... that's a month after I start !  :wink:

But roughly, there is 5 evenings worth of work.

And here is a picture of the beast yesterday (the glider, not me  :lol: ) :



Video as soon as I find my dv cable !  :!:

[Alan_Perse]

Looks great Fred.

[Fred]

Thanks Alan !  

And looks even better in the air ! :

http://www.gliderireland.net/images/videos/minigrunau.wmv  ( 4.9Mo)

[Fred]

Some pictures of the mini Grunau, in flight during Retroplane 2007 (you can have the full album and higher resolution photos here : http://www.retroplane.net/album/index.php?cat=11

Well, You need at least 2 launchers ! And not the smallest ones !  :lol:  :lol:



And in flight :



Fly like a dream !
Really easy to fly, and even only with Rudder / elevator, she's really responsive. We tried the roll (well, you need altitude !  :wink: ) and the loop.. And that's pretty much it !
After that, slow low passes to admire the line of the machine.
Thanks to Anthony for the decals (available here : http://www.rubberprintdesign.com)
Plan in a magazine sometimes next year, with Vincent's mignificent Cimbora  =P~

[drover]

Congrats for your magnificient  glider.
Can someone tell me were can fint the plans for the 1/13 scale Grunau Baby IIb ?
Please i want to build one like this.
Best Regards
George