Voir le sujet précédent :: Voir le sujet suivant |
Auteur |
Message |
Walter Incurable Posteur


Inscrit le: 05 Nov 2006

|
Posté le: 04/07/2016 21:02 Sujet du message: |
|
|
|
Hi Vincent,
...very interesting project - I will follow!
3784 actions.... and nobody can see this after covering....
So - I would suggest - make one ore two more for demonstration...
...hope to meet you in vauville
Walter |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 05/07/2016 09:51 Sujet du message: |
|
|
|
Hi Walter,
Thanks for the . Luckily you can see the ribs at the "Expo fuselage!", but the main reason is the translucentcy of the wings, with massive ribs they would look very different (I think )
Vincent |
|
Revenir en haut de page |
|
 |
Mad Doc Accro Posteur


Inscrit le: 08 Juil 2014

Localisation: Wuppertal, Deutschland
Âge: 45

|
Posté le: 01/08/2016 15:50 Sujet du message: |
|
|
|
Hallo Vincent!!!!
Endlich habe ich es geschafft mir Deinen Bericht anzusehen, was für eine schöne Arbeit!!!
Ich bin sehr gespannt auf Deinen weiteren Fortschritt, liebe Grüße,
Christian |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 21/08/2016 12:02 Sujet du message: |
|
|
|
Hello everyone,
Back from Polsa and our holyday I started again with the wings.
I liked to make the wingspars thinner, 4mm instead of the 8mm as planned, with internal crossbracing, as I discovered on the photo (with the FG 2 on crates). First I made a full size drawing of the wing.
 I made mainspars from 4 X 4 mm with a ply webb and vertical from 3 X 2mm.


When I got them finished they appeared to be very flimsy. I can imagine, that combined with the crossbracing it would be just strong enough, but very vulnerable. In the end I decided to go back to a bigger spar. Because the wing must not be stiff in torsion, I opted for 4 X 8 mm top and bottom with a single 1 mm ply webb.
 This was much better! I also choosed to have the wing divided, in one piece is too impractical. As wing joiner for the main spar I took a steel strip 10 X 1 mm and for the rear spar a 3 mm steel rod. In the centre part of the wing are a lot of attachments; on top the struts with fuselage, and at the bottom the landing skid. I took M 4 bolts bedded in epoxy with filler and some carbon reinforcement. I greased the M 4 bolts a bit, so I could take them out when the epoxy was set.



 (The balsa at the ends is just to prevent the epoxy for flowing out, it can be taken away easily.)

 All the stuff needed for the wings..
 The central lower part of the wing.
 Putting all the ribs on the spars, a very quick job compared with making of the ribs itself!
 One wing! To my big relief it was in horizontal plane sufficient stiff and stiff enough (for a biplane) vertically.
 Moment of truth: the wing is easily warped!
 Next thing is the upper wing.
To be continued.
Vincent. |
|
Revenir en haut de page |
|
 |
VincentB Serial Posteur


Inscrit le: 23 Jan 2006

Localisation: Béziers somewhere in the world
Âge: 58

|
Posté le: 21/08/2016 12:24 Sujet du message: |
|
|
|
Encore un sacré travail de fait, bravo Vincent ![[clap]](images/smiles/Clap.gif)
 Retroplane the World Touch - On the Web since 1854. |
|
Revenir en haut de page |
|
 |
michel Serial Posteur


Inscrit le: 04 Mar 2007

Localisation: Luchon
|
Posté le: 21/08/2016 17:56 Sujet du message: |
|
|
|
belle structure, c'est quoi comme profil ?
Michel


|
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 21/08/2016 19:04 Sujet du message: |
|
|
|
Merci Vincent et Michel pour les comments encouragieus!
Le profil est Eppler E174.
The weight of the wings at this moment is 640 grams, I think the whole plane will be about 3000 to 3500 gramms. Gives a wingload of 22- 26 gr/dm.
Vincent |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 25/08/2016 15:56 Sujet du message: |
|
|
|
Hello everyone,
Erstens, Christian , danke fur dir kommentar, es war schon lange da, befor wir zu hause waren, Ich war vergessen darauf zu reagieren.
This week I assembled the top wing,

I'will make the internal crossbracing only cosmetic, because I made the girders a bit heavier.

Top and bottom wing together;

Laminated the wingtips out of two 2mm X 3mm spruce .

Both wings

Now I am going to finish the wings and start with the fuselage.
To be continued. |
|
Revenir en haut de page |
|
 |
Frédéric Psycho Posteur


Inscrit le: 22 Juin 2006

Localisation: Corrèze
Âge: 57

|
Posté le: 25/08/2016 16:27 Sujet du message: |
|
|
|
Salut Vincent !
C'est magnifique ! Très joli travail !
Amicalement
Frédéric 


"L'eau plate ne favorise pas le vol de pente." Otto Lilienthal
"In Cyano véritas" Michel Coneuf
"Veni, bibi, vomi" Pasqual VOMITINO
Retroplane fort et vert ! |
|
Revenir en haut de page |
|
 |
michel Serial Posteur


Inscrit le: 04 Mar 2007

Localisation: Luchon
|
Posté le: 25/08/2016 18:10 Sujet du message: |
|
|
|
Magnifique structure,
Michel


|
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 26/08/2016 17:03 Sujet du message: |
|
|
|
Merci Frederic et Michel! It is very encouraging
I am waiting for the tubes and puzzling about the fuselage, how did Fokker connect the wood with the tubes etc?
Vincent. |
|
Revenir en haut de page |
|
 |
VincentB Serial Posteur


Inscrit le: 23 Jan 2006

Localisation: Béziers somewhere in the world
Âge: 58

|
Posté le: 26/08/2016 18:10 Sujet du message: |
|
|
|
Que fais tu exactement en tube? tout le fuselage avec les haubans des ailes et les poutres arrières qui maintiennent l'empennage? ou seulement la partie avant du fuselage qui est entoilée?
 Retroplane the World Touch - On the Web since 1854. |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 26/08/2016 19:37 Sujet du message: |
|
|
|
Bonjour Vincent,
Excuse moi, je continue en Anglais, the tailboom, horizontal and vertical stabilizers, wing struts, struts for the skid and the tubing to support the skin of the nacelle are of tube.
The " A " which you can see on the view from above on my plans is from wood, but I think it is interconnected with metal fastenings. In the coming week I am going to visit the "Aviodrome " (a museum) to have a close look of the Fokker Spin (spider) which is displayed there. The Spin is also a bit of hybrid construction, timber with metal. I hope that I understand a bit more of his , don't know how to say, construction pattern? just the way he worked with wood & metal. I ordered the tubes at "tubos capilares", very nice service, hope to get them on short notice.
Vincent. |
|
Revenir en haut de page |
|
 |
VincentB Serial Posteur


Inscrit le: 23 Jan 2006

Localisation: Béziers somewhere in the world
Âge: 58

|
Posté le: 26/08/2016 19:55 Sujet du message: |
|
|
|
Pour des connexions tubes/bois, tu peux braser une tôle de 1mm et boulonner. Le bois peut aussi rentrer dans un tube si ce n'est pas une partie soumise à des efforts.
 Retroplane the World Touch - On the Web since 1854. |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 26/08/2016 20:48 Sujet du message: |
|
|
|
Je ne comprends pas, helas, je ne connais pas le mot "boulonner".
On one of the photo's you can see (guess) how support tubes are fastened to the skid, it looks a bit like this.
The tubes are silver soldered to the "U "plate.
 The bolt is M2 , that would be M10 true scale. I guess he connected those quite big timber parts with metal plates and bolts. Its only educated guessing
Vincent |
|
Revenir en haut de page |
|
 |
VincentB Serial Posteur


Inscrit le: 23 Jan 2006

Localisation: Béziers somewhere in the world
Âge: 58

|
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 02/09/2016 12:36 Sujet du message: |
|
|
|
Bonyour a tous,
I started with the fuselage, first the nacelle. That is built of wood and steel. I tried to make a drawing based on the existing plans, photo's, thinking and guessing!

To get a better idea how fokker bolted all that wood together I visited the Aviodrome, the Dutch aircraft museum. The plane I like to see was the Spin (Spider).I was allowed to make photo's of details (thank you!). There is a snag, this was a replica of a replica, I think the basic construction of the fuselage was 90% correct.





As you can see, rather big steel profiles and big bholts are used, I'll try to keep this in mind!
I glued the wooden frame, first out of 10mm X 10mm spruce, but looking at some photo's of the original I changed it 8mmX 8mm.
 Laminated the skid, first 3 layers 3mm X 8mm spruce, later one extra layer at the bottom. I drenched the spruce in boiling water before bending. Clamped it without glue together
 and put very thin cyano on it, no mess!
Now I had to start with the metalwork. I ordered stainless steel tubes at "tubos capillares", as recommended on the forum and within a couple of days I received a 2m long package, very good service!
 I made the supports for the skids an the piece of metal at the nose to connect the 'nose'of the 'A' and later the tubing of the nacelle. It was long ago I used silver solder and it took some time to get used to it.
 After using a bigger torch thing went better, but it was sometimes difficult to keep all the parts correctly placed!



Later it will be bolted with M2 trough the wood.
 Just to get a better idea to make the tubing of the nacelle, the placing of the rc equipment and the pilots I put it temporary together.
 Never built someting like this
My idea is next to make the tubing of the nacelle and a bit later detailing the wooden structure. I am not used in constructing wood with metal and there is a lot of thinking and guessing in it!
to be continued. |
|
Revenir en haut de page |
|
 |
CHAUSSEBOURG Maniaco Posteur


Inscrit le: 22 Sep 2010

Localisation: Touraine
Âge: 84

|
Posté le: 02/09/2016 12:54 Sujet du message: |
|
|
|
Very good building and many thanks for all the détails!
Pierre
 Lorsqu'on est toujours en l'air, c'est qu'on n'est pas encore posé.
Johannes Walkowiak
LDC |
|
Revenir en haut de page |
|
 |
de Schaetzen Harold Maniaco Posteur


Inscrit le: 06 Avr 2006

Localisation: Schilde
Âge: 76

|
Posté le: 03/09/2016 07:44 Sujet du message: |
|
|
|
Prachtig! Zeer indrukwekkend. Alles is goed nagedacht.
Doe zo voort.
Harold |
|
Revenir en haut de page |
|
 |
bocorvin Maniaco Posteur


Inscrit le: 17 Aoû 2015

Localisation: Hillegom
Âge: 75

|
Posté le: 03/09/2016 10:36 Sujet du message: |
|
|
|
Thank you Pierre for your nice comments and Harold hartelijk bedankt en inderdaad ik moet me soms suf denken, maar dat maakt dit soort projecten spannend!
Vincent |
|
Revenir en haut de page |
|
 |
|