B17 XCD , advanced Flying Fortress

[killnoizer]

Dear PR19 , and Zenrat , Kerick and Buzzbomb , thank you very much 

That cutting and sanding needs only MUCH time and endurance, and a sharp eye...  Things i needed in my original work over 40 years so much .  But how much work would it be to do that conversion with sheet and putty ?

This is the absolut last part to close the tailwheel bay :

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It is not absolut perfect , but enough 😜
The very old vintage files from my Grandfather and dad are the best tools for that . They are super sharp and give a amazing smooth result , i have used No sanding paper for the complete Work, only for the wing bases to get the perfect fit:

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The Boneyard .

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I bought the two kits each from 15-19€ , that is a good Investment for the fun .
And i have a good pair of 4 engine wings left to build another STRONG Ju188 , or maybe a He111 ? 

[PR19_Kit]

AMAZING work there, MOST impressive.       

[killnoizer]

I made a construction of the props, i think this is the thing to come ..

Each blade around 8x12 mm , 12 pcs. per section .
It is just a short simulation , not 100% in measure ( but very near at the real size ) .

Front view of the first and the last rotator .

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Later this evening i cutted the lines of the rotators and put a little bit black color in .

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Next step is maybe building a tool from metal tubes to shape the blades with heat.
I think a 1" inch tube fits perfect into 1 1/8 inch tube , this could maybe solve the problem .

[Captain Canada]

Wow. That's summing up what I'm thinking. So cool !

[kerick]

This caught me by surprise! I was thinking you were going to use the engines on the wings in the usual way. Will they be contra-rotating?

[killnoizer]

First idea was the system like a jet engine, plus a housing over it i think that is all the same direction ?   But with a cover you cant see the blades ...
And i found no way to build a good housing .

So i came to this ,  and i believe contra rotating is the right way  , what do you think ?

[jcf]

The various versions of the B-17 also had a Boeing factory Model 299 codes:
299B (YB-17, Y1B-17)
299F (Y1B-17A)
299M (B-17B, originally designated 299E)
299H (B-17C, B-17D)
299-O (B-17E/F/G, also shown as 299O)
299-Z (Two aircraft converted as testbeds, also shown as 299Z)
299AB (TWA B-17G conversion)

Perhaps Model 299XCD. 

[killnoizer]

Thank you,  good idea with the test number .

Yesterday night i spend some hours more and started the blades. They need around 75 cm of cutted and shaped material (  30" )  .

I made the first step with a toaster , a bottle and a cardboard , than cut it in 8 mm lines and pre shaped the edges with a knife ,  went okay.

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[Rick Lowe]

Impressive conversion work there - I think I would have given up and filled and sanded all the rivets off.

I agree, there's nothing like a good, sharp file.

And thank you for the Toaster idea - much, much easier and safer than using other sources of heat for softening plastic for moulding! 

[NARSES2]

So i came to this ,  and i believe contra rotating is the right way  , what do you think ?

Most certainly, this is looking amazing 

[kerick]

So i came to this ,  and i believe contra rotating is the right way  , what do you think ?

Most certainly, this is looking amazing 

I'll second that

[loupgarou]

Impressve work indeed. And the tail propellers caught me absolutely off-guard. I would never have thought of this.

[Rick Lowe]

Yeah, I thought initially that it was a conventional (?!) rear-winged-but-still-Radial-powered-thingy.

[killnoizer]

Under construction !

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[kerick]

Looks like you are building a jet engine! Cool!