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B-25 Mitchell DTFB Build

#1
I just started a B-25 DTFB Scratch build that I would share the progress as I am proceeding through the build. This is a design by Phoenix1962 who has an article on the FT site on this build as well.

Wing span will be 59.9"
Length will br 46"


The beginings of the battery box construction

BatBox1.JPG

BatBox2.JPG

BatBox3.JPG

BatBox4.JPG

Construction of the Bomb Bay
BBay1.JPG

BBay2.JPG

Bbay3.JPG

Bbay3.JPG

Bbay4.JPG
 
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earthsciteach

Moderator
Moderator
#3
Wow! That is pretty intricate construction for DTFB. Nice work. What methods of construction are you planning on using?

I'm hoping to start on a 101," span, fan fold B-25 soon. My thought is to make a "box spar" fuselage with formers attached to get the proper contours. The formers will be wrapped with FFF for the skin. Should be very strong when finished.
 
#6
Wow! That is pretty intricate construction for DTFB. Nice work. What methods of construction are you planning on using?

I'm hoping to start on a 101," span, fan fold B-25 soon. My thought is to make a "box spar" fuselage with formers attached to get the proper contours. The formers will be wrapped with FFF for the skin. Should be very strong when finished.
I am using typical standard FT build procedures. This B-25 is patterned after the FT Cruiser as far as the same electronics and similar size.
Here is a picture of the belly pattern that I am yet to cut from DTFB. The skin here will be durable and look really nice for the scale like look.
Thank you for the input. More to come as I progress on this.

Bottomskin1.JPG
 
#7
Further Build Progress

Finishing up on the Fuselage and getting the skin on

Bottom Skin 1.JPG
Bottom Skin 2.JPG
Bottom Skin 3.JPG
Bottom Skin 4.JPG
Bottom Skin 5.JPG

Apply Front Skin 1.JPG
Apply Front Skin 2.JPG
Apply Skin 1.JPG
Apply Skin 2.JPG
Apply Skin 3.JPG
Apply Skin 4.JPG

Bottom skin all done showing Bombay Doors. Video to follow
Bottom with Skin1.JPG

Front with skin1.JPG
Front with Skin2.JPG

Magnets for Battery box
Magnets.JPG

Assembling Stabilizer
Stabilizer 2.JPG
Stabilizer 3.JPG
Stabliizer 1.JPG

Finishing with Top Skin on Fuselage
Top Skin 1.JPG
Top Skin 3.JPG
Top Skin 4.JPG

Filling cracks with Light weight spackling
Cracks 1.JPG
 
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#8
Video of my operational BomBay Doors

Here is a video of how I did my Bombay doors using two servos. Door speed can be adjusted to any speed I want them to be.
 

Ron B

Posted a thousand or more times
#13
If you gave the size of your plane I missed it.
What do you expect the weight to be with out electronics?
 
#15
If you gave the size of your plane I missed it.
What do you expect the weight to be with out electronics?
Wing span 59.9"
Length 46"
Wing Area 493in
Wingloadinq 14 oz per sq ft
AdamsFoamboard 7 sheets
Poster board 1 sheet
Owens Foamular 1" 1sheet

Using the FT Cruiser recomended electronics from Altitude Hobby