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Ed, you got me going on these cowls now.
Cowl foam plug has started to take shape:
I just went and assembled half of the models in my living room, then went on with these 3 views and did some measurements on the fuselage with firewall in place.
First i drew a point on the fuselage where firewall is and then drew 90 degree straight line by use of set square. By looking these drawings length of the cowls would be 6" from firewall to the lip of the cowl.
Then i marked second line at 6" from the first, these are my reference lines only. Once i had marked my reference lines vertically i went on and made couple of base templates for the cowls. These are same size as firewall is as they have to be mounted but against firewalls. Now i will go and find a usable piece of foam. I will be drawing crosiers on the foam block so my round templates will be squared as i did when Mike and i were making fuselage sections.
More to come shortly.
< Message edited by Props4ever -- 6/14/2008 4:04:37 AM >
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Yes i am aware of it Ed, but since my nacelles are 1" longer then suppose to be, i will try to make the best for this angle and how it curves inside the flap doors.
Maybe some compromise might be in order too.
< Message edited by Props4ever -- 6/14/2008 4:14:06 AM >
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I am using white foam to make my plug, in the pictures you can see i have already drawn crosiers on the templates and now waiting for the foam block to dry as i had to join up 2 foam pieces to make this block.
For glue i am using GP's Pro Wood glue (Alaphatic resin).
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While foam block for the plug is drying, i took this shot of the Connie minus its outer wings to see how it's attitude is with scale size main wheels vs other 2.25" ones i had on for the longest time.
I have to say, it's looking sweet and AOA is RIGHT ON!!!...he he
< Message edited by Props4ever -- 6/14/2008 4:27:00 AM >
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It's 538Am Saturday morning and i haven't slept yet!, I have been working on this plug all night.
Here is what i have accomplished so far, i divided this plug's build into 2 sections.
1- Make main cowl plug 2- Add upper and lower air intakes to the main cowl plug.
As i mentioned earlier that this cowl will not have functional flap doors initially as this is first experiment. Once if get it glassed then i will see if i could cut out side doors and make them functional with help of bell cranks.
Last night after foam block dried up, i made crosiers on it on both sides, then i lightly glued round templates on these sides and sat it to dry.
It took sometime to dry and then i started to saw of block sides from all sides going in round direction. When i had sawed off enough that just 1/8" of foam was left from the border of both templates i then started to sand it down in circular direction making sure all sides get equally sanded to the edge of templates. This took some extra time and care to do as i didn't wanted to sand off more then required.
After sanding was done, i took the barrel, templates attached and placed it on the IB firewall to see how it looked/felt. It looked good. After this i marked 4 points 1-1/2" in from the front template in curve pattern. These marks were reference marks where front round of the cowl will be made by sanding. I also used another smaller template that i cut it out from original one and placed it on the front center of the plug. This is where main air intake will be and crank shaft will come through to mount the propeller.
Once this smaller template was glued on and dried, i started to sand it in curve pattern to make the front curvature of the cowl. I took sometime and care as again i wanted equal amount of curve all around. This gave me proper front shape of the cowl. After this was done, i measured the size of the side flap doors and drew them with ball pen as out lines. Then again i took the plug and dry fitted to the both outer and inner nacelles to make sure all looks good. To me it's looking pretty good at this stage. What do you guys think of it. I still have to make inward curves on both sides where flap doors will be then i will make both top and bottom intakes and attach them as well before glassing this foam plug.
< Message edited by Props4ever -- 6/14/2008 11:52:52 AM >
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I can see that i have to make 2" engine block to secure mounts on them for all 4 engines.
I used old but new ASP 40 core as reference to ST40s that i am trying to get for this model, i have selected to use 4 Evolution PTS 3 blade square tip props on this model, they are 10x6 i believe.
You can see engines will vanish in the cowls!, good for scale appearance but i will open up head's area for cooling purpose.
< Message edited by Props4ever -- 6/14/2008 11:44:58 AM >
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All Forums >> RC Airplanes >> Scratch Building, Aircraft Design, 3D/CAD >> RE: Scratch building 105" W/S Super connie L-1049 G 
RE: Scratch building 105" W/S Su... - 
