Fokker FG-2 - Congrès 2017 Vauville

[DOMINIQUE DIOT]

superbe travail d'équipe

[Clifton]

Always a very good job. Marvelous yours pilots, thanks to your sister. You're a great team !

[bocorvin]

Merci Dominique et Clifton pour les comments!

I'am very lucky to have a sister who can make that!

Amicalement,
Vincent

[Mad Doc]

Aaabsolut sprachlos bin ich!!
Was für schöne Details! Ich wär so gerne dabei wenn die Fokker fliegt...

Liebe Grüße,

Christian

[Fotor]

Today Vincent and I assembled the FG-2 to make photos.
We also made some hand tosses. Exciting! But the result was not yet optimal.

Vincent will share the whole story tomorrow, but here some teaser photos.

[patte de loup]

Wonderfull work.

Pat'

[Mad Doc]

Wow!!! Mehr Bilder!!!
Grüße,
Christian

[bocorvin]

Thanks Pat, Christian and Raymond!

We had an eventful day, yesterday! After a long period of dull weather we had sun, so it was an excellent opportunity to do a fotoshoot. Raymond knew a nice location, so we started;


The building up takes a lot of time, I am thinking of improving that...






Wires all over the place....

And securing pins..

All those ribs...

Last wing slides on its place..













It had the nice transparancy where I was looking for





It was difficult to hold it!

Finally completed!

Because it was nice weather we decided to make some hand tosses.
Some problems became apparent.
First its difficult to get an hold on the fuselage?? so it was difficult to toss.
This is a link to a video of the bulding up and first tosses.
https://www.youtube.com/watch?v=nnVJrVO_WWs
As you can see, it needed some improvement!
The rigging appeared to be to weak, a lot of wire was not good clamped


The strain on the wires is pretty high with the kind of "landings" I made .
I also have some doubts about the wing warping, I am lokking to improve that.
Ther was also some damage at the wooden parts, a bit on the root of the wing and the skid.


I'll make the next changes; replace the rigging with heavier wire (90 kg) and improve the clamping, also securing the clevices and testing if it is strong enough.
Looking if it is possible to enhance the warping. I have some doubts about the control off the rolling, horizontal tailplane gives ample control!
Repair the skid and wing. When that is OK the FG can be towed, it is good that this weak points of the plane are discovered with little damage.

Thanks Raymond for the mental support!

To be continued,
Vincent

[VincentB]

Hooo, Vincent, you are crazy to do hand launch with this model at the field not enough speed to have good reactions, use a bungee or go to the slope or towing, please stop hand launch before destroy it

[bocorvin]

Hi Vincent,

Yes, I am going to tow!! it and yes I am a bit crazy . Luckily the model appeared to be quite strong
We don't have something like a slope but you are right, no hand launches. (with the Nemere it went OK, that's why we tried it)

Thanks Vincent, I'll listen to you

Vincent

[sebastian92]

Yes, marvelous !
keep cool, you have time to secure all

[michel]

le lancer à la main comme ça sans vitesse quel risque dommage!
Tu as de la chance Vincent il n'y ait pas trop de bobos.

Michel

[Sed]

Bonsoir Vincent.
Ton Fokker est vraiment splendide et je suis soulagé de voir qu'il n'a pas subi de dégâts trop importants !
Je m'excuse par avance si je "pollue" un peu ton post, mais cette petite mésaventure m'inquiète quelque peu car à dire vrai, je pensais procéder un peu de la même façon le moment venu pour faire voler le Tenax... Et au vu des différentes réactions des pilotes expérimentés du forum, cela ne semble pas du tout raisonnable ! Pourtant, je ne suis vraiment pas très chaud pour le lancer directement dans la pente sans avoir pu effectuer auparavant quelques réglages. Alors je me permets de m'adresser à eux à travers ton post pour savoir comment ils procèdent pour le tout premier vol...
Bons futurs tests .

[bocorvin]

Thanks a lot Michel, Sebastian and Sed for all your comments and advices!

I am very glad there is little damage and in this way I learned about the weak spots of this plane! Fokker himself made also a lot of changes on this plane!
Sadly I could not do as Fokker on this picture



I knew the risks of hand launches, but there are also risks with towing or bungee.
I learned a lot of it, I'll make some changes in the wing warping and rigging and I have got the confidence now to tow it!

Vincent.

[Johannes]

Nicht kaputt machen, Vincent
Sie ist viel zu schade!
Ich mache solche Erstversuche immer mit Flitschengummi:
Erst nur mal rutschen lassen, dann immer etwas mehr vom Boden weg
steigen steigen lassen, so kann man sich drauf einstellen ohne zu viel Schaden zu verursachen (meist )

Gruß und viel Erfolg beim erneuten Erstflug
Johannes

[Mad Doc]

Just Beautiful! Maybe it´s good you found out where the weak parts are before you go to Retroplane 2017... Would have been even more annoying.

Surely it will look marvelous in the sky!

Greetings,
Christian

[Mad Doc]

I just remember a Airco D.H.2 I had built. It was a really beautiful thing, unfortunately on the maiden flifght I had to find out that my wires were not tight enough, too... They got into the Propeller and the Propeller ripped out the controll wires from thre rudder... THAT was sad....


https://www.youtube.com/watch?v=jFS4KbAURzU

More Greetings,
Christian

[Philippe26]

Aïe !!!
What a pity !
Sorry for you, it was a beautiful plane...
Philippe

[Fotor]

[Philippe26]

SUPER !!!
Philippe

[bocorvin]

Hello Johannes, Christian, Phillippe,

Sorry for your plane Christian its sad to see it happening.

Thanks all for your caring remarks!! I think the bungee thing is a very good option to make first flight attempts, it good to dose. Slopes and towing is a bit more frightening for me
Luckily there is not much damage and easy to repair. I never built a biplane with functional rigging, so I had a lot to learn. Specially the shockloads are so much higher with rigging because the whole thing is so stiff. I will replace the rigging and I already changed the servo arm of the wing warping to give greater travel, its now 7.5 degrees up and 7.5 degrees down.
Don't worry, it will be OK, at least I know its quite robust

Vincent

[Johannes]

Hallo Vincent,
kannst Du mal schreiben wieviel Spannweite und Gewicht Dein Modell hat?

Gruß Johannes

[bocorvin]

Hallo Johannes,

Das sind die daten;

Some facts of the model;
span 2m 22cm
lenght 1m 45cm
wing surface 132 dm2
weight 4450 gr
wingload 33.7 gr/dm2

Im anfang hatte Ich gedacht dass die Spannweite des Originals 12 meter war, 2.40m als Model. Spater habe Ich dan entdeckt dass das Original eine Spannweite von 11.20 hatte, im Model 2.22m.

Gruss, Vincent.

[Johannes]

Danke Vincent

Und jetzt schnell wieder alles reparieren

LG Johannes

[bocorvin]

Bonjour a tous,

The first thing I had to tackle was the rigging. I ordered wire for 90 kg, but it was to thick, not good for the looks . The insufficient clamping in the bushes with the 40 kg wire was the problem, the wire just slipped out. I think this was a mistake of mine. I am familiar with sailing and on sailing rigging the clamping is 100% free of slipping, so I just clamped the bushes. Now I learned to make an extra loop in the wire to get it slip free.


I replaced all the rigging, except for the rudder controls, because the loads are so much less.
Next was a new skid and I decided, (because its an vulnarable and essential part) to make a spare one.

laminating with thin CA, the thermos bottle is to keep the water for bending nice hot.

coloured with bister and merisier from "Liberon"

On top, bottom and sides I put glass roving with epoxy.

Connected with 3 M2 bolts to the fuselage




Finally I repaired the wing






So the Fokker is ready to fly again, we are going to tow it, hopefully coming weekend, the forecast is good and Rob is getting his Piper ready.

Vincent

[Clifton]

Very nice job ! I'm happy for these good news.

Congratulations !

[de Schaetzen Harold]

Dear Vincent,

Nice repair. This plane is so beautiful.

Concerning first flights I am working as follow:
On the slope, with some nice Wind, I am running with the glider in my hands and I am "feeling" the movement. Up or down? It give you already good informations.

See you next time.
Regards.
Harold

[bocorvin]

Hello Phillipe and Harold,

Thanks a lot for your encouraging comments.
A slope is certainly a good place for a first flight. Regretfully, the only slope in our region has a very nasty landing terrain, very, very small, with barbed wire around it and a lots of turbulence, with a modern glider with brakes is still tricky.
So we are going to tow it, nice flat field and I have adapted some controls, less elevator and more wing warping, so I hope for the best.

Vincent

[Fotor]

I have had the honour of witnessing the first flights of the Fokker yesterday. It was beautiful!

I't up to Vincent to tell his story, but here are the pictures and movie:

The plane had a lot of attention.





Some adjustments




Ready for takeoff



















The sunlight throught the ribs is beautiful.













Vincent was a happy man!




Celebration with some eclair-like cakes.




And a special car-sticker was made.




Movie of the first flying day.
https://www.youtube.com/watch?v=bNBfcjasQuk

I have not been able to fully enjoy the view of this magnificent plane, because I've been looking at it only through my various cameras, but the resulting photos and video make up a lot for that.

[bocorvin]

Hello Raymond,

Thanks very much for making this wunderful film and the also the pictures
I am very glad the FG-2 flew, still some work on it, we think th c.g. is too for in front ( it flew with about 10 degrees elevator up)
But it flew! and the anemometer really turns

Vincent