Author Topic: Lets build a CL-41 Tutor Jet (Photo Walkthrough)  (Read 678 times)

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #22 on: November 25, 2015, 03:51:05 PM »
Main Gear continued...

Shown below, is all the parts needed for both Landing Gear assemblies.

The Main Strut is rolled and glued to an outside diameter of 3.5mm (at the top).
I rolled the parts around a piece of straight wire...actually a straightened metal Paperclip.
After rolling a few times, and once the paper started to retain the tight roll, I removed the metal wire.
Then I rolled the part to its proper dimensions, while gluing it.
If done correctly, you should be able to trim a short piece of wire and slide it back into the Strut (or extra strength).

The other bracketry needs to be scored, folded and/or rolled.

Glue the Tire sides to the main Tread.





...
Start by attaching the middle bracket and support arm to the Strut.
There is a marked (shadow) location for the wraparound bracket,
and the strut pieces are glued together to form a thicker support arm.

Note the positions of the upper brackets as shown (in this photo).





...
Fold the upper brackets into shape and attach them over the support arms ...and glue to the sides of the Struts.
I filled the gap with glue, but you could also insert some card.
This connects the parts ...and forms a larger mounting base for the Strut assembly.



...
Now apply glue to the top end of the Strut and along that upper bracket...
you can sand the top end flat if necessary
...and glue the Struts into place, inside the Wing Wheel Wells (at the marked locations).

On the real Tutor, the Landing Gear Struts extend very close to the front outer corner of the Wheel well opening.
On the model, you can push the Strut right into the corner...this will give you a little more support for the Strut.
Apply a drop of glue to the sides of the Strut.







...
DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #23 on: November 25, 2015, 04:20:10 PM »
You may have noticed that I did not fit the Wheel and Tire assemblies to the Struts...
attach them after the Struts are installed.
This way, you can align the Wheels properly without worrying about the Strut positions (which are slightly angled in the Wings).

The little box Hub has a curve cutout to fit against the Strut, and a bottom plate to secure it to the bottom of the Strut.
Generously apply glue and press into place...making sure the wheels are parallel with the fuselage.



...
The open Gear Doors can be assembled and fitted at this point.
The parts are layered for 3D effect, however the doors shown in these photos have since been modified.
Its a little tricky cutting out those matching parts exactly, so I changed the assembly to avoid this problem.
[On the final model, you will fold and glue a larger outer door part...then cut out using the inner door layer as your guide.]

Those inside layers are small parts and require a bit of patience to cut out.
Laminate them and then affix to the inside of the Doors for visual effect.





...
You can also fold and glue...then cut out...the tiny little "actuators" for the Wing Flaps.



...
The final redesigned Door parts will also include a small supporting bracket for those inboard Doors.

The Landing Gear Doors are simply edge glued to the wing surface at the Wheel Well openings.

During Landing and Takeoff, the Gear Doors open to allow the extension and retraction of the Gear.
Once the Gear is fully extended, the inboard Door closes again by hydraulic operation...leaving only the outboard door open.
Many "parked" Tutors are seen with their inboard Doors hanging open...probably due to hydraulic pressure loss.
(P-51 Mustangs have this same situation!)


This is why I opted for a full Wheel Well...and I leave the decision up the builder (how to position the Doors for final display)
If you want to leave the inboard doors open, like I have done here, at least you have a full wheel well behind it.

Note the Wing Flap Actuators in place.












DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #24 on: November 25, 2015, 04:54:21 PM »
One BIG thing I discovered since installing the Landing Gear...is that the plane is tail heavy!

I had assumed the plane was fairly well balanced...
and I did actually count and weigh the paper parts front and rear of the wings!

But, it seems the nose will require some additional weight...only about 4 Grams.
Thats the same as two Pennies (US or Canadian).

I have updated the instructions to alert the Builder to deal with this problem
(if installing Landing Gear, and long before you assemble the Fuselage).
All you need to do is slip a couple of pennies into the fuselage, above the front Wheel Well.

(I was able to lift the instrument cowling, cut a slot in the fuselage, and slip in a couple coins so my model survived!)

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #25 on: November 26, 2015, 05:20:11 PM »
So, now that the aircraft is sitting on its wheels, I only have two things left to finish.
I'm working on the underside Pylons and Fuel Tanks (Diesel for the Smoke generators)
and I will update on those shortly.

But first, I'll finish a canopy.

The paper canopy included with the model is no different than other paper canopies
and requires cutting some slots, shaping the parts, and then gluing it all together.

I prefer to make the canopy as smooth as possible, so I don't use overlaps.
Instead, just cut some small triangles of paper or card and attach to the inside of the canopy
across the slotted areas.  As you curve and shape the part, the slotted areas will come together
and you can hold them with multiple tabs.
With patience, you can get an opaque, but nicely formed canopy.
Use a rounded end tool to burnish (from the inside) and make it even smoother and more curved.

A second layer...just the Frame...is layered on top to strengthen and create depth to the canopy frame.

As you see, the canopy is in two sections, windscreen and main canopy...and you can join them together to make one solid unit.
I will be altering this design to be one piece which you can separate if you like (into the two parts).



...
As with the Snowbirds build, I am experimenting with clear canopies and trying my hand at vacuforming.

I have added to the kit, a template for cutting clear acetate...but its still requires assembly like the paper canopy.
The frames however, can be used on a vacuformed canopy.



...
My biggest problem is finding the right plastic sheets and getting a usable canopy.
My latest attempts are with thicker plastic which isn't forming as well as I need.
They look okay by themselves, but aren't accepting the paper frames very well.
The canopy I created for the Snowbirds model was much thinner and very flexible. It was easier to fit the frame to.
The thicker plastic also makes it difficult to flex it for a tight fit to the aircraft.
The sides keep pushing outwards.
The front won't stay down against the fuselage.



...
I tried a couple more vacuforming attempts, and got a little better fit.
I will try to make a few more, once I find some thinner lastic sheets.

In the meantime, I fitted this Canopy, so I could install the liittle vent thingies in front of the windscreen.
No, I am unsure of exactly what they are...they look like some sort of air vents.

I start with base parts, that fit onto a marked location on the fusleage.



...
And then a second layer, which is the vent hood, and it rises slightly above the edge of the windscreen.





DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #26 on: November 26, 2015, 05:29:35 PM »
DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #27 on: November 27, 2015, 10:19:33 AM »
So, to wrap up this build I just have to add the Pylons and Fuel tanks.

These are straight cylindrical tanks with simple conical ends ...which makes for a simple model version!
Hardest part is the Pylon construction and fitting to the fuselage.

I am trying to make a little diagram (for the Instructions) that shows where to position the right and left Pylons.
They have different side shapes to compensate for the uneven underside fuselage surface.

Score and fold the Pylon parts...well, actually only fold the rear glue tab. The front end gets a roll.
And slightly crease the sides at two spots...to create the overall shape.



...
And then glue the right and left Pylon into place against the fuselage.



...
Next, prepare the parts for the two Fuel tanks....everything is mirrored right and left.



...
Hardest part is rolling and gluing the small conical end caps.
I use as many tools as possible...dowels, wire rods, pencils, markers
...anything round and smooth that can help me curve, roll and secure paper tubes and cones.







...
The Fuel Tanks are marked to show you the position against the Pylons.
Just put a drop of glue on each of the four little mounting brackets (on each Pylon)
and press the finished Fuel Tanks into place.






...
And thats it.
All I need to do now is take some final photos.
I'll post those as soon as they are developed.  (Young folks scratching their heads right now..."developed?")

In the meantime, its back to the Instruction pages.


DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #28 on: November 28, 2015, 05:11:21 PM »
Still experimenting with vacuforming.
Found some plastic sheets that are much thinner, but not too thin.
Tried a couple more Canopies...and scored a couple more successes.



Also tried another thinner one, but it wrinkled.
I will try some more thinner ones, because I like the thinner, more flexible canopies.
Its just tricky not to burn them or wrinkle them since i am working with a heat gun to softent he plastic.

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!

Dave Winfield

  • Administrator
  • *****
  • Posts: 2645
  • Kudos 51
    • Dave's Card Creations
Re: Lets build a CL-41 Tutor Jet (Photo Walkthrough)
« Reply #29 on: December 02, 2015, 11:49:01 AM »
So, it looks like the Golden Centennaires version is completed
and other than some minor adjustments, that kit is completed too.

I took some photos of the finished model,
you can see them all here (in my Flikr Tutor album):
https://www.flickr.com/photos/65936213@N08/albums/72157660391251542



As I said, I am making adjustments to the kits as I build these test models
and I am now starting work on the Cover pages for the kits.
(The main purpose behind the photographs of the finished models)

I am also still working on the Instruction pages...which is very tedious and time consuming.
I can't release a kit until that is done.
Hopefully I will have something before Xmas.

...
Just got in touch with a fellow up here in Ontario who runs a business restoring and custom building
aircraft, cars, hot rods, and other items...aswell as a Military Museum.
He has a couple of Tutor jets in his shop at the moment
...one for sale on eBay right now, and another being restored for a customer.

(The aircraft for sale is in RCAF livery, and the restoration will be a Golden Centennaires paint scheme.
Both are ex-Snowbirds planes, which is the case with most surviving Tutors
other than the 20 exMalaysian AF aircraft,
of which many were sold off to private owners ...such as John Travolta!)

Anyway, he has graciously sent me a bunch of photos of the underside of the wings
...specifically the Landing Gear bays.
An area that I have never found photos of!
Now, I can go back and adjust my artwork for the Wheel Wells and add a couple more details.
I mainly wanted to add any walls or dividers that are present on the real thing.
So thats another modification I need to make to these kits.

DAVE WINFIELD - GO TO WWW.CUTANDFOLD.INFO FOR MY DESIGNS AND LOTSA FREE STUFF!