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HK B-17...C 5/4 sweating the metal


brahman104

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Craig,

What can I say! You just keep outdoing yourself with your "do overs!"

I thought your original ammo box was a work of art, but your new ones look fantastic --- and must be a timesaver!

 

I have to wonder sometimes if the C will ever be "truly" finished with your eye always on accuracy and revisiting items that where thought to be put to rest!

I'll love to see her when fiinshed, but each "delay" is an interesting project in itself! I for one can wait as long as it takes. Every step you take us through is well worth the wait!

 

Terry

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  • 1 month later...
On 6/26/2019 at 12:31 PM, TKB said:

Craig,

What can I say! You just keep outdoing yourself with your "do overs!"

I thought your original ammo box was a work of art, but your new ones look fantastic --- and must be a timesaver!

 

I have to wonder sometimes if the C will ever be "truly" finished with your eye always on accuracy and revisiting items that where thought to be put to rest!

I'll love to see her when fiinshed, but each "delay" is an interesting project in itself! I for one can wait as long as it takes. Every step you take us through is well worth the wait!

 

Terry

 

Thanks Terry,

 

You know between this and the Desert Rat, I'm not sure who'll be finished first the way I'm going! :)

 

Anyway, back home after 6 weeks in the States, I've found some time finally to get some runs on the board with the C..... First up was the rudder pedals and centre pedestal, followed by the permanent fixing of the two rear seats in the cockpit. I really like the green I ended up with ;)

 

61EESuJ.jpg

 

Then, in a change of direction I decided to get done something I've been procrastinating about for a while - the nose windows. I covered the interior of the nose section with putty in an attempt to replicate the soundproofing felt. How successful that will be remains to be seen, but it has made the walls quite thick. I drew up some frames in Rhino and printed them on the Photon; still have a huge amount to learn about resin printing!

 

UQuNosG.jpg

 

Once cleaned up, each will form the inside border for the window. On the outside, the windows will be oversize acrylic which will be sanded and shaped, then the final window dimensions will be depicted by the aluminium skin.

 

PgqFZE7.jpg

 

Takes a lot of grinding and test fitting to set each one as they are bevelled to allow support of the acrylic pieces.....

 

gQBj5EB.jpg

 

Then fixed in place with epoxy.

 

VMmE2Ld.jpg

 

On the last photo you can see how the support will work so my clear bits don't fall in :)

 

9vk8AUN.jpg?1

 

More of that, then hopefully some colour and fitting out of the nose section to come soon!

 

Cheers,

 

Craig

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Craig,

 

Nice to have you back and recovering from your vacation!

 

I have to ask --- do the window frames have "rolled edges!"

 

Cockpit looks great. The overall cockpit coloring is very effective.The shade of "bronze green" you came up with is just right. The more "oliveish" sidewall insulation isn't at stark contrast, but enough to keep things from being soporific; the yellow seat cushions/floatation devices add that "glitz" to the surrounding greens. Your control yokes will also set things off. You avoided the cockpit from becoming a "green chamber." Excellent work and very realistic looking --- you pulled it off nicely.

 

I'm sure all of your "major" work on the "C" is rewarding, but it must be truly relaxing when you work on something like the "finishing" details of the cockpit.

 

Terry

 

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On 8/18/2019 at 8:09 AM, TKB said:

I have to ask --- do the window frames have "rolled edges!"

 

Haha, well the skin isn't on yet, so if I can find a mini-Mike to do my metal work, I might be in with a chance!

 

So as I've found out recently, the outboard engines are situated too high on the wing. Not really enough to worry most people, but if I'm going to build this C, then an E and an F, I figured it might be worth my while to see if I could something about it. Also, I had to get rid of the intakes between the two engines in each wing and the outboard fuel boost pump blister underneath as, after lengthy discussions with Terry (TKB), we've concluded that they weren't fitted until probably the E model.

 

After studying a myriad of top photos of the wings, it became apparent that the rear of both nacelles are the same distance from the rear spar line of the wing. When I examined the kit, here's what I found:

 

URIfpyC.jpg

 

Assuming that HK at least got the length of the nacelles right, that means that the outboard is too high by about 3-4mm, which is what I'd figured. So what to do about it?

 

Well as you know, I'm no stranger to drastic surgery...

 

Y3b57sG.jpg

 

The wing plastic is ridiculously thick, so it took ages to remove the upper and lower nacelles...

 

IiKZY6y.jpg

 

Now off the wing, you can see quite clearly how high it sits on the kit....

 

802SDdb.jpg

 

After a while of thinking, I got to what I feel will be a reasonable fix:

 

First of all, I had to bridge the gap where the original was. (this is the lower nacelle, as it needs to move down)

 

wq9Z9TI.jpg

 

Then, using laminations of plastic to follow the wing profile, I built it up (down) to 3.5mm

 

aYFksVT.jpg

 

Then placed back on the wing, you can now see it has had the desired effect...

 

jAoTVWF.jpg

 

5gLy0XZ.jpg

 

Iq1MQuQ.jpg

 

Still a huge amount of work to blend it back in, but I think I'm on the right track.......

 

Cheers, Craig

 

 

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Craig,

 

I have to admit, "dumbstruck" is exactly what I was by the simplicity of your nacelle fix!

 

You're the exception to the saying "Those that can do, those who can't teach."  YOU DO and TEACH!

 

Absoulutely great work!

 

Terry

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  • 2 weeks later...

Thanks for the encouragement and interest guys! It always helps on such a long project such as this one (5 years and counting!):whistle:

 

First up, the engine work is going really well. The engine halves have been reattached and everything is looking good. Still have a bit of reconstructive work to do on the wing/nacelle join and reshaping of the lower nacelle but I actually think I'm going to be able to pull this off!

 

JA4KqX6.jpg

 

WoEbdeQ.jpg

 

32Ra5nB.jpg

 

And for a comparison shot..... definitely worth my while!

 

7jw9eyO.jpg

 

Leaving the wing/engines for while, I wanted to jump into something I'd been procrastinating about for quite a while: lighting.

 

The big issue I had was that the wiring for the lights would have to travel through/around the bomb bay at some point, not to mention the two dome lights that needed to be added in there. Every time I temporarily fitted the bay inside the fuselage I was potentially doing damage to the frame, so I really just needed to suck it up and get on with it. I made some new lights, which were surprisingly easy out of soft foil....

 

WSk9KAu.jpg

 

UVusobs.jpg?1

 

I then drilled a hole to route the wires outside the bom bay shell and to a little LED distribution board I got from a model train company call ngineering. This board allows me to hook up 8 individual LEDs and will regulate the voltage and current to them equally. Solves my problem of making bus bars!

 

Positioning it in the life raft bay was convenient and it meant I could still display the right hand side open...

 

v7EGge3.jpg

 

I had to redo the forward entry door light as constant test fitting of the fuselage must've broken one of the very fine wires at some point. Hence my desire to start getting things permanently in place...

 

ZVhVOCA.jpg

 

Apart from the two new bomb bay lights, I also drew and 3D printed the little work lamps for the navigator and radio operator. I then drilled and threaded a little LED into it. Hard to photograph, these lamps are a grand total of 6mm high!

 

wFemMY2.jpg

 

Then tested everything prior to fixing the board upside down for the remaining 4 LEDs to be hooked up at a later stage.....

 

2YP8Mej.jpg

 

NOa9AgI.jpg

 

H3S1Qgs.jpg

 

4PEjObN.jpg

 

87AdXTY.jpg

 

S9fb9x1.jpg

 

I also spent two whole days re-running braided cable across the top of the bay. This was to replace that horrible black thread I used that went horribly saggy in the humidity. This was NOT fun at all, as I had to do everything from the bottom of the bay turned upside down, but looks infinitely better!

 

dgoq6G9.jpg

 

With the bomb bay set in place, I now really wanted to get on with the nose. First task was to smooth out the putty around the windows to make a surface that would loosely resemble the felt lining in the compartment...

 

I forgot to take many photos, but I also worked at adding the detail to the front of STA #3.

 

cy2KGGf.jpg

 

Once painted, I thought it came up looking pretty good...

 

0BDnYR1.jpg

 

From what I can interpret of period photos, the "hard" surfaces may have been painted the DDG colour like the cockpit, so I added that along with my previously printed oxygen bottles.

 

fgV966y.jpg

 

Getting the rest ready to install in the radio room and the rear fuselage...

 

wkpUV5l.jpg

 

The heating ducting in the nose was always going to be challenge, considering the multitude of angles that it turned through. It was also supposed to be made of unpainted metal, but I had a plan....

 

doMMMrS.jpg?1

 

First of all, I found some nice box section styrene that I could work to get the shape. I wanted to make it in one piece so I could finish it completely prior to permanent installation.

 

Eventually, I had the piece ready. The black in pen ink used to sand the piece smooth.

 

zC6tqfU.jpg?1

 

Then, and I don't know why I hadn't thought of this before, I covered the piece in aluminium tape. The same principle as the litho plate, but much easier to work for something like this and not having to worry about that horrible contact adhesive....

 

fpCMlKh.jpg

 

Roughly installed... looks the part!

 

EDxcAUu.jpg

 

I'm not entirely happy with the placement of the double O2 bottles, so I'll probably move them down to make room for the driftmeter case and the meter itself.

 

Finally! I'm actually getting somewhere with this! Very happy!

 

Craig

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