People are joining and then emailing me to ask for plans. We do expect you to contribute to the community before being granted this option. I have added a section to the rules of the forum to cover this.

Slingsby T.50 Skylark 4

Let us all watch your new project progress.
Post Reply
User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

Thanks Vince. Actually my choice of 1/5 scale has made things a little more difficult. I am finding that producing fine detail with my sausage fingers is trickier than with 1/4 or 1/3.5.
Brian :?

User avatar
chris williams
Posts: 1085
Joined: 10 Mar 2015, 10:50
Location: Blandford Dorset

Re: Slingsby T.50 Skylark 4

Post by chris williams »

You'll forget all that when the time comes to carry her up the hill! ΨΨΨΨΨ

User avatar
Barry_Cole
Posts: 1332
Joined: 10 Mar 2015, 09:30
Location: Hampshire UK

Re: Slingsby T.50 Skylark 4

Post by Barry_Cole »

Don't you have a Minimoa to spray slow setting paint on?????

:ugeek: :ugeek: :ugeek:

BC

User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

Spot On Chris.

User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

I needed a little break from balsa bashing so I covered the finished tailplane, elevator and rudder. The tailplane and elevator were covered in “Profilm” white while the rudder was covered in “Glosstex” white. These have now been hinged with “Robart” hinge points. :)

In the last day or so I have started building the wing centre section panels, starting on the right. As I said at the beginning of this thread Mike used a wing section which is not unlike the full size NACA63-620 which works out at 22% thick on the plan. I felt that using this would give a fairly narrow performance envelope so I am changing it to HQ3.5/16 at the root transitioning to HQ3.5/14 on the centre section. The tips will transition further to HQ2.5/12 at the wing tip. The upper surface of HQ3.5/16 is fairly close to that on Mikes plan is considerably shallower. Because of this I have had to make adjustments to the plywood joiners at the centre. All of the ribs and spars occupy the same positions on the plan but everything which has a “depth” function has had to be modified. :)

Hey Ho! One of my builds wouldn’t be one of my builds without a few mods here and there. :D
Brian.
Attachments
Covered tailplane, elevator and rudder.
Covered tailplane, elevator and rudder.
Right wing centre section being built over the plan.
Right wing centre section being built over the plan.

User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

The internal structure has now been completed for the whole centre section. All dihedral braces, webs, joiner tubes and strengthening braces have been fitted.
I am presently debating whether to sheet this structure now or will I build the wing tip sections onto the centre so that everything can be properly aligned before sheeting.
Attachments
SL4_030.jpg

User avatar
RobbieB
Posts: 548
Joined: 07 Mar 2015, 22:22
Location: North West

Re: Slingsby T.50 Skylark 4

Post by RobbieB »

Definitely tip sections first Brian - or at least just part sheet, bottom only perhaps.

User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

I clearly forgot the old adage that you should check everything twice before cutting when I started building the wing. I fitted the centre section to the fuselage and found that the mounting area on the fuselage is shorter that the finished wing chord by about 1/8 inch (7mm).
I checked the wing plan and then the fuselage plan and elevation and each has a different measurement. B****r!!!!! (Translation: Oh Golly Gosh) :oops:
I cannot change the wing chord! I cannot move the former at the rear of the wing seat backwards! I can only shorten the cockpit area slightly to make room for the leading edge!!!!! :x :x :x :x :x
So I have had to pull apart the freshly finished cockpit frame and shorten by 7mm then fill in the gaps at the rear! :evil:
Not Happy! :( :( :( :( :(
Brian.
Attachments
Not enough room for a leading edge!
Not enough room for a leading edge!
SL4_032.jpg

User avatar
VinceC
Site Admin
Posts: 744
Joined: 22 Feb 2015, 11:45
Contact:

Re: Slingsby T.50 Skylark 4

Post by VinceC »

Don't worry Brian, that sorts the men from the boys

User avatar
B Sharp
Posts: 662
Joined: 19 Mar 2015, 17:18
Location: Perthshire

Re: Slingsby T.50 Skylark 4

Post by B Sharp »

After much deliberation I decided to shorten the cockpit area and also the canopy frame by just over 1/8 inch. A piece of 1/8 hard balsa sheet was glued to the rear of cockpit bulkhead and shaped. The canopy frame was disassembled and rebuilt to fit the altered space. Of course this meant alterations to the side frames, the back frame and of course the magnet catches. So after 24 hours I have returned to where I was 24 hours ago – but now the wing will fit!
Brian. :)
Attachments
1/8 spacer added to bulkhead and everything resized.
1/8 spacer added to bulkhead and everything resized.
SL4_034.JPG

Post Reply