|Dec 01, 2008, 04:05 PM|
Scratch-Build-Off 3 1/28 scale 7 engine bomber, Kalinin K-7
My entry is the Kalinin K-7 at 1/28 scale
wing span = 173.9 feet = 2086.6 inches
1:28 scale = 74 inch wing span, 60mm crew members
Russian 7 engine bomber, last flew in 1933, more information here:
Since the fuselage is mostly wing, I decided to use the original airfoil.
According to http://www.public.iastate.edu/~akmit...foil_usage.htm
the airfoil is TsAGI R-II.
I decided to just trace the airfoil in CorelDraw, bring it into Profili as DXF,export as *.dat to Compufoil. (Thanks to Milhafre and Vintage1 for CorelDraw training)
The Wing and horizontal Stab both have a constant chord main section with an elliptical outer panel.
Compufoil constructs elliptical wings with just the root chord and half span as inputs, so it is not necessary to draw a plan of the wing beforehand.
I am still trying to improve my skills with CAD, so my entry will be mostly CAD with maybe enough time for the build.
|Dec 01, 2008, 05:30 PM|
Joined Sep 2006
I think the Bison's uglier, but the Kalinin is like a caricature of a plane. I kinda expect to see Donald Duck and Mickey mouse pop out of it, followed by the seven dwarfs - one to man each engine!
|Dec 01, 2008, 08:49 PM|
Fantastic subject! It has been on my list of "Want to" for a while as well.
I lover the Habitrail tunnels from the gear platform to the upper decks.
Love to see this one come together.
|Dec 01, 2008, 09:33 PM|
guys thanks for the coments.
Pat, The Bison is well ahead in the challenged appearance contest.
Mike, I'm planning on 8 pounds weight with 700 watts of motor. I have a set of 3s 8400 MA batteries for power. I was thinking of having the one pusher at 300 watts and then six 70 ish watt motors.
Ryan, Like the Chinese say "live in interesting times?
Paul, I knew there was something familiar about that cross section.
Geoff, Just trying something different, I was considering the Burnelli.
Darryl, Maybe put some gerbils in there?
|Dec 09, 2008, 03:55 AM|
Great prototype! You've got me hooked and subscribed! The bigger and uglier, the better...
I see your point on the airfoil. You really little choice since it is such a large part of the character of the airplane. Any more appropriate shape would result in a very unscale-like appearance.
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