Slingsby Gull scale 1/4

[bocorvin]

Hello everyone,

A friend had some doubts of the reinforcements I had made me at a weak point, which I had created in by drilling in the lower mainspar. I had a bit of a blind spot . Glad he told me that, it was easy to improve now So I took out the webbing plate, cleaned up the spar and chamfered the extra layers.




made also doubler on the top spar and put a double webplate at the front of the spar.


I couldn't put extra wood at the rear of the spar, (it was not on the real thing) so instead of that I put on some glasrovings with epoxy on the webbing plate. Later I laminated some short sections of glastape on the webbing to reinforce that also.



Its looking better, so I could go on with all kind of details of the wings.

To be continued,

Vincent.

[Mad Doc]

How nice it is to watch you working!!!
I definetely have to learn to do some of that soldering!

Christian

[bocorvin]

Hello everyone,

Thanks Cristian for your nice comments! The silversoldering is not that difficult, reading a bit, the right stuff and a lot of try and error (sometimes burnt fingers )

Next was with the nose of the wing.



I was a bit worried about that, there are about 12 joints in the ply covering of each wing (there is a bend in it; 4 seams). Scarf joints is very difficult to do it properly because of all curved surfaces. I build fuselages with butt plates instead, wich worked OK. In the wing it would be easier solved with thin glass/epoxy, instead of much thicker ply.
On a flat, (non sticking) surface I soaked 25mm glasstape with epoxy and let it cure. I took that off and cut it in the middle, getting strips of 12mm wide, 0.2mm thick and very flexible. I glued that with cyano an the ribs were the joint was needed. Sanded the rib first slightly down a bit (just the 0.2mm).





The panels were prebended, using boiling water and dried for some time. I fitted both sides and left a overlap at the main spar. Glued it with thick cyano on the leading edge, put the panel on, fold it in its correct position and let that harden


The wing is held vertically just for easier gluing


Now I put the wing flat, opened up one side, put glue in it and closed it while pulling it back.





Turned the wing over and glued the other side. Cut of the surplus


After a lot of gluing..



Still a lot of fiddley things on the wings to do.

To be continued,

Vincent

[Olli]

Hi Vincent,


nice wood work

Best Regards Olli

[Eric Spore]

Nice work ! One more devotee for skin laying with thick cyanoacrylat glue.

[bocorvin]

Hi Olli and Eric

Thanks for your nice remarks Olli !

About the cyano Eric, thats because of the building story of your Nemere .
Besides, it appeared to be quite strong, see "atelier reparation, Nemere 1/6"

Vincent.

[patte de loup]

Nice work Vince
Pat'

[bocorvin]

Bonjour,

Thanks a lot for your remarks Pat' .

I went on with all the control wires, first the wing, I changed the wires for a bit thinner wire, 20 KG, about 0.53mm thick. It was 30KG and that was a bit stiffer and the pulleys are not that big, now its working better.
From 1mm steel wire I bended a loop, which locks the aileron and which I (hope) to unlock via the slot for the control wire .





Th pull-pull wires for the elevator attached at the bellcranck


and also the wires for the rudder with a kind of homemade kwiklinks




Now it was time to put the lower ply panels on the fuselage, first I glued on the strips which acts as butt-plate



sanded everything and started to glue the panels

prepared, put on the thick cyano

put it in position and pressing it with a batten of 10X10 with non adhering tape on it (the brown parcel stuff)


there are some more panels to do...
The wings are now 975gr, servo's included and some minor panels missing.

Vincent

[sebastian92]

Hello Vincent,
you should put on gloves to stick with the cyano… it's safer for your fingers !
Good luck for the future ; it looks good

[caralp_laurent]

Hi Vincent,
Congratulations, it's superb

Friencly,


Lolo

[bocorvin]

Merci Sebastian et Lolo, and I'll put my gloves on .

Vincent.

[Clifton]

Hi Vincent,

I'm coming back to the forum after a long time.

Very nice build, I love this sailplane. I hope I'll see your Gull flying one day.

Friendly,

Philippe

[bocorvin]

Hi Philippe,

Nice to hear from you again . Thanks so much for your comments.
The planning is to fly the Gull at retroplane 2020, hopefully you see it there. It can fly as a "strutted" Gull and also as a "cantilever" Gull or Gull III.


Friendly,

Vincent

[bocorvin]

Hello everyone,

Next was the fuselage, a lot of panels!
The doublers low in the fuselage are to reinforce the fuselage were you hold it to hand launch it.


and a look at the inside with the steering cables in place



I also put some weight between the side panels in the front.

and it began to look a bit like the Gull



Now the nose (pif? )

and the real thing


this was presumably the prototype, it has the short canopy. what I liked was the difference in tints. So I choosed to put different veneers in the nose. Hopefully it will tone down after the staining, I will see.


I use veneer (massive thin wood) instead of ply, its possible to sand it.



and sanded






To be continued,

Vincent

[Sed]

Superbe, comme d'habitude !