Slingsby Gull scale 1/4

[caralp_laurent]

Hi Vincent,
Bravo, it's superb !
Will you come to launch it at Chantemerle this summer ?

Friendly,


Lolo

[bocorvin]

Thanks Pat' and Lolo for your nice words . I often see only the things wich went wrong
Lolo, its not possible for me to come to Chantemerle, I wish you good weather, nice winds and a lot of thermals

Amicalement, Vincent

[caralp_laurent]

Thanks Vincent
I wish you good flights too

Friendly,

Lolo

[bocorvin]

Hello everyone,

I sprayed the instrument panel satin black

very black...
I didn't glue the ply at the bottom, so I could slid the cut out dials in. On top of the dials I put a disc from about 0.3mm clear plastic sheet as glazing. Finally I glued the "screws" in place.



Next the glazing of the canopy. The real Gull has wooden strips also on the outside.



I started with staining the frame of the canopy. I choose to do that with bister (an organic material I bought in artist shop). I cut the canopy glazing in three parts which I glued on the frame with 'canopy glue'. After drying I glued strips (0.5 X 5mm spruce) lenghtwise

not easy, its slippery . I cut slots in these strips and glued brebent strips across



excuse that the picture is blurred but it was the only shot of the gluiing, short of hands...
After a lot of fiddling it fitted reasonably flush with the rest of the fuselage.




the instrument panel in its place


The fuselage still needed its skid, I decided to make a rigid one.
Laminated 3 layers of 4mm balsa, painted dirty black and the skid itself from 2 layers of 3mm spruce

two small battens to keep "the canvas" in its place are already glued on the bottom of the fuselage.



To be continued,

Vincent.

[bocorvin]

Bonjour a tous,
It was time to finish the ply. I hesitated which colour I would choose. In the end I decided to make a fairly light staining, making the Gull how it should have looked leaving the factory.
So I used bister, (Francais; bistre) the same stuff as on my Nemere 1/6. It is an organic pigment (a powder) with only water added. Rembrandt used it, I bought it in an artist shop. I diluted it quite a lot, till I got the right staining ( I hope....)
I put it on with a brush and


because its practically only water it had to be spread with a sponge


A small detail; I made the impression of inspection hatches with a rotating cutter, just in the outer layer of the ply (after glueing 3mm balsa behind the ply), stained it so the scraped circle became very visible


and than glued the "handle" on the hatch



I put on two layers of "porienfuller" (did this job outside) and after some sanding one layer PU boatvarnish





Put it together

I had the sun straight in my face...


Ready to put the diacov on, which I received last week.

Vincent

[sebastian92]

Hello Vincent,
beautiful color and beautiful reflections on the wood !
do you live near the river ? it is splendid at this season !
many thanks for this picture ; a very pleasant breath of fresh air

[Franco Vallari]

Molto bello Vincent.....complimenti

[Claude Moinier]

An eyecatcher Vincent, bravo

[bocorvin]

Merci beaucoup Sebastian, grazie Franco et merci beaucoup Claude for the nice comments
The water is not a river, its a made by digging, a ditch I presume
A big part of The Netherlands is actually below the NAP (sea level). Our house is about 1meter below sea level and just 100meters away from us, is the Haarlemmermeerpolder which is 4meters below sea level. Good fun to check that on Wikipedia!

Vincent

[ManfredNeu]

einfach nur wunderschön , Vincent.
Manfred

[caralp_laurent]

Hi Vincent !
Wow, it's magnificent ! Congratulations !

Lolo

[hermann]

Hallo Vincent,
Herzlichen Glückwunsch , sehr schönes Projekt und Realisierung .
Ich hoffe wir treffen uns diesen Sommer.
Sehr freundlich
Charles

[bocorvin]

Danke Manfred und Charles fur die angenehme Worte and thanks Lolo for your nice comments
I start putting on the diacov, hopefully all stays straight and level...

Vincent (DB)

[bocorvin]

Bonjour a tous,

After the varnish I put on the Diacov

and put on a ply ring, just as a dummy inspection opening for the spoiler




Then varnished the Diacov and had a bit mixed feelings about that, some less good varnishing at the bottom, not possible to change it
Now I could put the CG alright and I had to put in more lead than I had hoped.

700 gr, making 950 gr lead in total. poured in 24h epoxy, so it became a rigid block.
Reason for so much weight was perhaps the weight of the tailplane (145gr). Total weight of the plane is 5200 gr with struts (2 X 10mm carbon wingjoiners) giving a wing load of about 55gr/dm2 and 5600 gr without struts (2 x 10mm steel wingjoiners) giving a wingload of about 59gr/dm2.
After fitting the receiver and programming the transmitter I discovered a nasty problem , the ailerons didn't come well in their neutral position.
How did that come? To avoid problems with the steering cables I made the servo arm exactly as long as the rudderhorns. Because there was some friction in the pulleys and the servo arm was long , it didn't centre properly. What to do? I discussed it (at 1.5meter distance) with my friend Adri (from the anemometre on the Fokker) who had an identical problem already solved. He made a angled servo arm. I made a crude drawing and with a compass I constructed the angle on the servo arm, sorry, its analog . In this drawing the servo arm is half of the aileron arm


second drawing at 30 degr

I converted this angle om a circular servo arm and had to drill an extra hole


To my relief I had made an inspection opening in the bottom of the wing root, so I could change the servo arm and adjust the steering cables.

To my big relief the ailerons worked nicely and returned now to their neutral position

To be continued,

Vincent (DB)

[Olli]

Hi Vincent,

wie mein Klavier
Super Bauausführung und Technik

Gruß Olli

[bocorvin]

Danke Olli, ja Ich war ganz gut gelaunt wenn die Querruder gut functionierten

I go on in English, the Gull is completed on the outside,the sun was shining, so I took the Gull outside for some pictures









Adri made the name and the numbers on the wing, registration letters were not needed at that time



You can see at my face (straight in the sun) that the Gull is quite heavy


Some detailing of the cockpit is still to be done.

Vincent (DB)

[Franco Vallari]

Formidable!!!!

[Sed]

Waouh, superbe ! Très belle finition !
Il ne reste plus qu'à prendre l'air !

[sebastian92]

Marvelous !
you are a strong men ! position of victory
keep cool, some weeks again…

[bocorvin]

Thanks Franco Sed and Sebastian, yes it was quite heavy and my wife didn't know my camera, it took some time

I am afraid it will take some time before we are allowed to fly again, but I'll keep you informed.

Amicalement,

Vincent (DB)

[caralp_laurent]

Bravo Vincent, it's magnificent !
I knew we would have finished our gliders at the same time
Ready to go to the slope or field. We just Don't know exactly when it's possible...

Friendly

Lolo

[bocorvin]

Thanks Lolo for your comment!

Yes we have to wait, I am going to finish the interior

Vincent (DB)

[Greg]

Il est superbe, en vol ce sera un régal ...
Bon, on attend

[Johannes]

Herzlichen Glückwunsch zu diesem tollen Modell
und danke für den interessanten Baubericht, Vincent
Jetzt wollen wir nur noch hoffen das sich die Situation um das Coronavirus
sich bald bessert und du das schöne Modell bald einfliegen kannst

Liebe Grüße und bleib gesund
Johannes

[bocorvin]

Merci Greg und danke Johannes fur das commentar

Muss nur noch an dem Cockpit und Piloten arbeiten und dann warten ob besseren Zeiten fur die Erstflug....

LG und ja, bleibt gesund,

Vincent (DB)

[Eric Spore]

Magnifique !
Encore un chef d'oeuvre

[bocorvin]

Merci Eric, I am feeling humble from all those nice comments
It still didn't have its maiden flight, hopefully that will be less nervewrecking as with the Fokker FG-2.

Friendly,

Vincent (DB)

[ManfredNeu]

Hallo Vincent,
einfach klasse, das Modell. Und wie schwer ist es geworden?

Gruß Manfred

[bocorvin]

Danke Manfred .
Leider ist sie schwerer geworden wie gepland. 5200gr im Gull I ausfuhrung (2X 10mm kohlefaser Flugelverbinder und Flugelstutszen?) oder 5600gr wie Gull II I met 2X 10mm stahl Flugelverbinder (ohne Flugelstutzen?). Bei ein Flugelflache von 95 dm2 gibt es ein belastung von 56 oder 59 gr/dm2. Vielleicht auch nicht slecht, weil wir nahe die kuste fliegen und immer viel wind haben.

LG,

Vincent (DB)

[Clifton]

Ma-gni-fi-que !

Quel beau travail et c'est un très beau planeur que j'aime beaucoup . Bravo !

Philippe