It is a good idea but I do not have that kind of cash!!! Looking into foan cut with insert for a CF sq wich will pass thru the several hinges!

3d printing comes out at about $3 per hinge,give or take,and numbers make that price come down a lot.

https://cimg9.ibsrv.net/gimg/www.rcu...e596715c1a.jpg

Flap/Aileron
My problem is now hinges, I have a them laser cut out of aircraft grade alum; 5052-H32!! The problem id getting a stable part build. at 1;10 scale the wing span is 114" the aileron is just shy of 18"! As you cam see it has a very small foil.The sq. hole is for a CF solid rod to tie the hinging together where they can not twist independently!

Charles,I was thinking to myself,the middle slat is pretty much constant in it's rotation,why not lay up carbon fiber cloth on a form,and use that as the rigid shape to stabilize the hinge locations?

The inside flap portion of the outer control surfaces is large enough to use my conventional construction Method:
0. A jig with the three ribs and the hardware a part of the jig.
1. The remainder of the ribs loaded onto the jig as they are threaded on the CF sq.
2. A 1/8" Birch ply spar to position the ribs and hardware vertically.
3. A 1/4" sq. balsa LE.
4. A 1/32 Birch ply TE
5. Sheet top surfaces w/ 1/6" Balsa. heavily epoxy and CA the flap together.
6. Carefully remove the jig legs and base.
7. Smooth the bottom where the jig was removed and sheet w/ 1/16" Balsa
8. Sheet the pocket wit 1/32" Balsa.
9. Glass bottom and top w/ 5/8oz. FG cloth and Eze Kote.
10. Pocket not glassed.
11. Finish
Going to try the same with the aileron portion also!!!

that aileron portion is probably where it goes to "h in a handcart",as what is giving the aileron independent movement from the flap,and yet still droops by a percentile value in the mid slat,as the flap is lowered.It was all done by a interconnected cable and pulleys,BUT, does one do that by multitrack linkages in the servo world as we know it?

Independent servos of each on the flap/aileron. Flap movement is mixed with aileron to null the flap movement. Inboard the out side portion is hinged to the inboard portion driven by a link to the hinge base cause it to add angle [21 degrees] to the flap making a full 61 degrees..

Interesting project. The RCMP brought a Caribou an airshow at Fairchild Air Force Base many years back and it was one of the most impressive STOL demonstrations I have ever seen by any aircraft. Seeing something that big set down and lift off in an incredibly small hunk of runway is indescribable.

It was a big hit in Vietnam, on those mountain top bases!! The whole H stab can be trimmed 0 to 4 degrees. That makes is a lift surface so your not dragging it up behind the plane!!

what it does is allow a steeper angle of approach,and take off(it really creates the STOL effect) as when the hStab is rotated upward,it brings the nose down,along with the leading edge of the wing,thus decreasing the stall speed,by about 10 knots.So,steep and slow on takeoff and landings,with a flare just at touchdown.

very interesting,, I definitly thought about this Aircraft to built. Is there a Plan available?

Charles has one,and I have one(cad modelled)

and what is the size ,,, in mm cm?
do you sell it?

Mine is 96" ws. $50 for the cad file,easy traditional balsa construction,all formers should be cut with a scroll,or laser.

Hi Alex, is it possible to make it bigger like 140" or so?

it is,but the notches for 1/4" furring and 1/2 x 1/8 would scale up to something 3/8,and 7/8x5/16 respectively, or,you could adapt the fuse formers on the fly,(dont print by laser).You see,notches for materials like stringers are what take the most time,in a plane design,where each rib,each fuse former is drawn and produced in sequence.In my drawings,I use 1/8 ply thickness,1/4 x1/4 and 1/2 x 1/8 strips almost exclusively,and so the parts scale up.Right now as it is ,the length is 75",inner wing rib..12",wing spar 1"box..and so on

Caribou simplified
 

https://cimg3.ibsrv.net/gimg/www.rcu...b9ddcfe38c.jpg

this gives you a general view of the build

if you have cad skills,you Can modify the formers and rib notchings to suit your choice of dimensional stock.

Hi Alex, thank you. I´m not a Computer specialist, i`m cutiing all the Parts per Hand and elektrical Machines. The Thing is here in Germany we have metrical measchurements, so i must Change all the Notches anyway, that is not the Problem. i had build some Planes from US Plans, they were also in inches, so i have practice in such things.

The only Problem now in my Mind is the Engine. I think about four stroke( I know it has Turboprop) or electric (but this is not my first choice) Thrustreverse is an interesting Thing to think about.

this might help you to visualize the formers involved
 

The actual had radial engines.In my model,it was Turnigy G60's electric,but,my weight should be about 7 kg,so in your case10-12 kg.maybe more.So,in scale flying,probably DLE 20's. or four stroke 120's.There is a ton of room for systems inside it(after all it is a freight plane.).The real concern is being able to get landing gear with long enough legs.So, if you are scroll sawing,anyways, the laser cut files would lend themselves to manual editing of the slots,after you print them on paper,for 3mm stock.6mm stock,and your locally sourced material dimensions..as you are dealing with plywood formers and spars, balsa ribs,balsa stringers.The engine pods have,at minimum,on my model,63 mm diameter at the cowling--scale that up by 40% more for your idea.The firewall is 63mm from the front,and 75 mm between box side .It has to be aligned vertically to allow retract installs.

The wing isnt small,with a lot of flap.
 

The engine pod is fairly large,and symmetrical,then rotated to suit the inner wing.https://cimg5.ibsrv.net/gimg/www.rcu...a0a025da6d.jpg

very cool, i like planes that you don´t see everyday on the field. And things like These Flaps.... make it very interesting to me. i´d like it to built up to 20 kg or so.. Here we can go up to 25 kg without any extra permissions.. And if you see my P61, 3,6 m wingspan with 2 radials 24,5 kg.