Author Topic: CT-114 Tutor (RCAF / Snowbirds)  (Read 948 times)

Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #11 on: June 11, 2015, 05:14:33 PM »
...continuing on, I have been test building a few parts.

I decide to start with the cockpit (since Nobi had numbered those parts first).

Right off the bat I see a few areas that I need to adjust and change.
This is not a criticism of Nobi's quality of design,
just some things that aren't the same as what I see in photos and some things I want to put my own ideas to.

I had already been working on a simple design for the ejection seats,
and I like my artwork over what Nobi has chosen to do.

Keep in mind, I originally just specified a "cockpit tub" with basic components.
So, I had originally planned to to do my own style of cockpit.


I built up Nobi's cockpit to familiarize myself...





and then I started swapping in my own parts
and adding some colour and textures.

For the first design, I've also included the Snowbird's red and blue seat cushions
(since the first kit will be a Snowbirds model).
Other versions will just have gray or green cushions.





This is also the first aircraft model where I have not used a photographic instrument panel.
Its a lot of work, editing and creating a miniature photo panel...
and it usually doesn't print that great anyway.
So, I am trying a new, graphic approach.

Keep in mind, there is still some tweaking...
and I just got in contact with Nobi, because I have changed the fuselage.cockpit construction
and asked him to modify a few parts...which will force some cockpit alterations too!
So, what you see is still in early design stages.
But, I like it!




...

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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #12 on: June 11, 2015, 05:47:13 PM »
Checking the assembly of the nose parts...all good.

Checking the fit of the Nose Wheel box.  Good.
Needs a bit of enlargement...and some gluing tabs.



Its, around the cockpit area, that I have a bit of fit problem.
And I don't like the lack of bulkhead formers in this area.
So I have altered the fuselage design a bit...Nobi is supplying me with some new formers,
and I am modifying how the cockpit fits into place.

Other than that, I am chuffed with how its coming together.

So, now I cut it up and build it again!
lol
Because I have a plan to eliminate those ugly seams on the underside.


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yukonjohn

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #13 on: June 13, 2015, 03:32:45 PM »
Very nice work - looking forward to seeing more.

BTW, I have a few photos of the AETE Tutor when it was up here in 2006 if you need more.

Regards,
John

Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #14 on: June 13, 2015, 04:18:25 PM »
I don't know what version that is. AETE? the Aerospace one?
If so, I'll let you know if I don't have enough material.
Thanks
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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #15 on: June 17, 2015, 07:43:02 PM »
Look what I did today!

I completed all the artwork for the logos and insignias and graphics...
and laid out the paint scheme for the Snowbirds Tutor!



But don't get too excited.
I'm still stuck on test building the fuselage.
And Nobi is working on a few extras for me...incluidng modifying the engine and wing attachments.
(I was unhappy with the shape of some parts, so we have redesigned things a bit).

I think I have got the fuselage sorted out...and I am now building the tail section.
(I'll post some pics soon)
I am on my fourth build of the fuselage/cockpit...I just couldn't get a handle on Nobi's original design.
So, I made my own modifications which didn't completely work.
After some more changes, I think I finally have an assembly I like.
Once I confirm that the full length of the fuselage goes together properly, I'll post a report.

Tonight...test fit the new Exhaust insert parts.
I've added an inner wall to the fuselage end, and a separate jet exhaust tube to go inside that.




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Vermin King

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #16 on: June 17, 2015, 08:02:41 PM »
Gonna be mighty pretty. 
There are no strangers in this world ...
Only people I haven't embarrassed ... yet

Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #17 on: June 23, 2015, 07:22:44 PM »
Short bump - quick update

Been doing little bits here and there...I've built four cockpits so far.
Three Nose assemblies...working on the fourth.
And two rear fuselage halves.

All this because I am modifying the design at the same time as I introduce new details and parts.
I'm also running into small problems in a couple of areas...
one being the engine, and wing root design.
With Nobi's help, we have sorted out some changes and he is updating the basic template.

I also just started a test build of the Snowbird's artwork...



and introduced some new exhaust parts for the tail end of the plane.
Which have worked out quite nicely.
(Nobi is also designing for me, the rear fairing and smoke/diesel injector nozzles)

While assembling the Snowbirds fuselage, I got to try out my updated Speedbrake recesses and door assemblies.
Unfortunately, this brought to light another design problem with the model.
...and some related assembly problems have now led to me redesign the rear fuselage

and once again, Nobi is modifying the template to my instructions.
(lol Poor guy!)

Anyway, I am slowing down with test builds until I get the new template,
and then I'll probably start again with another Snowbird's test.

Stay tuned bat-fans!
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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #18 on: August 13, 2015, 11:00:07 AM »
okay, so its been a while since I updated...

heres what has happened with the CT-114 Tutor model (and the Snowbirds prototype):

the first modifications I made, were to the wing root design.
I wanted a larger root fairing, more taper at the back, etc
and this also meant redesigning the engine intakes and how they fit to the wing roots.



So I passed along all this re-design work to Nobi, who sorted it out in short time.

In the meantime, Nobi had also designed the wing mounts and long range fuel tanks that I had requested.
At the same time he was able to create the center mounted tanks* for the Snowbirds planes as per my instructions.
 (*Diesel fuel for aerobatic smoke)

It was during this time that I went ahead and assembled a Fuselage...in Snowbirds livery.

I found a number of small fixes...but I ran into a big problem with the rear half of the fuselage.
Assembly was difficult partly based on the model design.
(One section just too long to reach inside, making control of the assembly quite difficult
...and the area around the speed brake openings was just too narrow, making the fuselage very weak in one area.)

So, I designed a new layout, new part configuration, moved some seams...and passed along the idea to Nobi,
who redesigned everything to my satisfaction.

I redid the Snowbirds paint work...altered the exhaust parts to fit the new fuselage sections...
and did a full test build of the fuselage.



I also made some adjustments to the instrument panel, cowling and canopy parts.
Combined with the entirely redesigned Cockpit, it all seems to go together quite well.

Heres a couple more shots with the canopy removed.
Obviously I have not fixed the canopy on the model.
A paper canopy needs to mounted in the open position, or left unattached (to view the cockpit if installed).
For the next build, I'll try a clear canopy (fixed in place).







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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #19 on: August 13, 2015, 11:11:25 AM »
Even added the exhaust nozzles for the aerobatic smoke.

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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #20 on: October 04, 2015, 04:21:34 PM »
okay, so I haven't worked on the Tutor in some time...
was working with Nobi to make a few changes to the design.
Nobi has now finished the commisoned work for me,
and so its all up to me now.

Unfortunately life has dealt a new set of cards this year
and I have been busy with personal and home issues.
So, the paper model work has taken a backseat.

Until today.

Nothing else to do today, other than try to watch a Nascar race online...
so I decided to open up the files (on the computer)
and finalize the redesigned wing ribs/spars and landing gear boxes.
I test printed some parts and it looks like I have only a couple of minor adjustments to make.

Yes, there are a whole bunch of corner braces (which I have not fitted yet)
which will strenghten and square up the spar/rib assembly.




So, maybe the Tutor is back on the workbench.
woohoo
I still need to do the Snowbird art/paint on the wing parts before I can test build the wings themselves.
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Dave Winfield

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Re: CT-114 Tutor (RCAF / Snowbirds)
« Reply #21 on: October 08, 2015, 09:12:45 AM »
Well, I have been continuing with the Snowbird build...this is a good thing right?
Maybe I can get back into it and get the model done before Xmas?!

I wanted to show an excellent example of how I deal with changes to the design work.
With a project like this, I know from the start that I will be modifying the basic design,
swapping in my own parts, adding stuff, and tossing out some of the original work that I don't like.

Luckily, when commissioning Nobi to do work, you won't find much you don't like.

But not everything works right, and theres always a lot of changes and adjustments to suit my preferences.
And, since I didn't design the basics, I have to figure out the design and assembly (as Nobi intended).

I'm working on the vertical Tail (Rudder) which also supports the raised Elevators.
Nobi provided an assembly diagram...
but the small, perspective view didn't make things completely clear.
There are four parts...straightforward...with cross join slots...and one gusset style brace part.

But, once assembled, the parts don't match the Tail shape...and are too big, too long.



...
After some thinking, I realized that the angles in the assembly drawing are actual "angles".
The parts need to be angled during assembly.
(More like whats in the next photo)
But this presents more problems.
The 1mm thick parts don't angle within 1mm wide slots.
The upright support actually bent while trying to form the parts.
And everything is still too long and doesn't line up properly.

As a 2D drawing...minus the 1mm thickness...it looks like it should work.
But it doesn't.



...
So, I started from scratch...using the overall shape and size of the Tail fin part...
and readjusted the lengths of the upper and lower forms.

I kept an upright part...just resized...and moved rearward, so it can maintain a right angle connection.
(This is the only slotted connection now)

And to hold everything in place, three simple gusset pieces.
(Just position, center, and glue in place)



...
The mounting locator hole idea is retained (in the fuselage)
but it has to be repositioned because of the modified vertical support position.

The small lower gusset part is optional, but it helps with the mounting to the fuselage.





...
You can fit the structure to the fuselage, but I found it better to glue the structure inside the Tail fin first.
Then mount the entire assembly on to the fuselage.

But I guess the builder will find their own preferred method.



...
Next step is the horizontal Elevator which mounts at the top of the vertical Tail fin.
You can see the spar already in place.
Hopefully the attachment of the two elevators is without issues.
Stay tuned.





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