Buldog - F3A

[maki]

link to my friends page. (as soon I will find out how to posti it here, "jpg is not allowed") .


Bogdan

Hi,
Sorry for writing in english, I hope that pictures will tell more than words.
I would like to introduce you project for season 2010 from Sloweina. As you will see, construction is wood based with some gfk implementations.
Project is based on older models from my friend, who is also a constructor of the model.
Construction was made in CATIA-V5, with newest implementations of the F3A models.
I hope that this thred will be useful for some excange of experience.
Here is the link to my friends page. I will try to explain each picture (as soon I will find out how to posti it here, "jpg is not allowed") .
Fell free to post your comments.
Best regards,
Bogdan

[maki]

I have made link to photos on album:
basic start with side reinforcement and undercariage..


wooden motor mount, suitablle for elektro motors and glow or gas. It is strong enought for all.


basic construction of main frame


undercariage plate and support for LiPo's or rezervoar


tail section basics


rock solid frame for suporting other parts


basic parts together, big opening for acssesing cells ...


from top...

[maki]

I have made an album on this forum, so now I have just made a link to the pictures. At the moment there are not all pictures which I have, but will be added soon. First two will be also - I must request it from the owner. At the moment I have some other pictures from catia which will be also posted.
Yes, you have wright. One is for me and other for my friend. He is incharge for construction and wood work's and me for cnc cutting and gfk laminates.
Pictures are in flash, but I will have it soon.
Regards
Bogdan

some first basic construction...


nose with spinner...


taill


pictures inside of the modell, here you can see reinforcement with styro foam top and bottom


model is wide so it can cower eaven gas engine with side exhaust

[Seb Leaute]

impressive job!

[geoffroyBelgium]

Great construction! Realy like this wooden job. I'm impatient to see the evolution of this construction.

[Steph bernard]

Very interesting project,

You have used a 3D CAO modeler for design. Do you try to calculate the weight of the model ?

best regards

stephane

[Marbar]

Helo, everybady!
I`m builder from Buldog.
First my apologies for my bad english. Never learned!
So, yes, in CATIA V5 is easy to calculate weight. But must be construction finished.
Some things (especialy wings an stabilisators) are changed, construction is not finished yet.
All balsa breets are weighted: balsa 2mm between 20 and 22g
balsa 3mm between 30 and 35g
balsa 1,5mm between 16 and 19g
Diference in weight between fuselage 1 and 2 is only 5g!

More about buylding from my friend Bogdan!

Regards

Marko

[jclaude]

Very interesting! I always liked multis in wood structure. Future plans maybe?

Très intéressant ! J’ai toujours aimé les multis en structure. Futurs plans peut-être ?

[maki]

As I have promissed, here are basic pictures from CATIA V5 and rest of drawings. As you can see, basic design was a little diferent then the model becomes now. Marko decided to modify geometry of wing and tail. Now they are a little more swep back.

complet 3D model view


side view, here is vertical stabilizer cut out from the fuselage, later was modified and cut off completly


another 3D view


here you can see proposal with MVVS 26ifs (which I was using on my ex plane )

[maki]

Very interesting! I always liked multis in wood structure. Future plans maybe?

Très intéressant ! J’ai toujours aimé les multis en structure. Futurs plans peut-être ?

Thank you jclaude for posting replays in both languages, so I can learn something French (I know that be better to wisit France )

[maki]

Rest of the pictures from CATIA V5....

top view, with older geometry


construstion of the vertical stabilizer


here you can see unique system of tightenig the horizontal stab with one screw from the tail tip


and cowered with balsa


oposite side...


vertical stabilizer (old plan) now is the rudder completly cut off, and have qite wide TE
and bottom "U" cover is now made in sendwich construction balsa-styrofoam

[Seb Leaute]

Hi maki,
for direct translation in french you can put your sentences between this BBcode:

Code : Tout sélectionner

[translater=fr][/translater]

But only one sentence each times(for the moment)

I have do it for your first post.
regards
seb

[maki]

Thank you Seb! I will use this.

Here is continuing building log.


vertical fixed tail with balsa sheets and balsa block (hollow) on the top.
()


here you can see how wide the rudder is. At the moment we dont decide to install any adjustement mechanism for horizontal stab.



and the cables are on place. It is much easyer to install it now.



here is cnc cuts styrofom with 1,5 mm balsa covering. They become really light weight. All cuttings was made with GMFC program.



upper part of the fuselage is almost ready



fuselage glued together, waiting just for canopy and motor cover



and from front



vertical stabilizer is ready



interior, extra rib was made in place between fuselage and canopy



here you can see very smart move to fix horizontal stabilizer with just one screw



and the screw



and the rudder is done



rudder with newest knowledge in design



While the wings start building by my friend Marko,
here is the link to previous model called "hypeshade 90" which is also a very good model for starting point.
A plan in PDF format is also awailablle for free there.


link"hypeshade 90"

[pilou17]

Hello,
Very nice Airplane.
I am sure that this plane will fly very well

See You
Pilou

[maki]

After a short time out, things is going on. Marko has finished my fuselage, hrozontal stabilazer and I have manage to make a gfk canopy.
We are making some weight calculations with fuselage and tail sections. Calculations shows that model will weight from 2600-2700g. Almoast complete fuselage is only 750g, and canopy come out 116g.






tail section of both fuselages



here we have mesured the canopy, and accuracy of canopy



we are werry satisfied with the look and accuracy



it realy looks good...



and here is still missing some ribs inside the canopy which will be added to reinforce the canopy



regards,
Bogdan