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  #1  
Old 04-29-2009, 07:25 PM
FlyBack FlyBack is offline
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Default Zuni RBG build

Thought it might be interesting to see what could be done with the wing from an ArtHobby Zuni-V R/c glider.
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  #2  
Old 04-29-2009, 07:45 PM
FlyBack FlyBack is offline
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Default Mock-up

Design Features:

Added about 10 degrees wing sweep on trailing edge to get C.G to work out. Inverted V-tail for exhaust clearance and proverse yaw. Twin booms to allow use of an electric motor with pusher propellor instead of a rocket motor. Pull/pull control wires to the ruddervators. Will use an AeroTech E6-RCT motor.
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Last edited by FlyBack : 04-29-2009 at 10:35 PM.
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  #3  
Old 04-29-2009, 07:52 PM
FlyBack FlyBack is offline
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Default Contstruction so far

Construction progress so far...
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  #4  
Old 04-29-2009, 08:15 PM
Ltvscout Ltvscout is online now
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Default

Excellent! This is what we like to see, a nice photo progress report of a project.
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  #5  
Old 04-29-2009, 10:37 PM
FlyBack FlyBack is offline
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Thanks Scott... will update as I get further along.
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  #6  
Old 04-30-2009, 03:54 PM
shockwaveriderz shockwaveriderz is offline
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flyback, looks great. Can't wait to see more.


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  #7  
Old 11-04-2009, 07:24 PM
FlyBack FlyBack is offline
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Default Update

Quote:
Originally Posted by FlyBack
... will update as I get further along.


Finally. Now that construction of my BlackStar model is completed, I have a bare workbench. I've decided to resume work on this design, instead of moving on to Config 2 of the BlackStar (have to finish CAD drawings of Config 1 first).

Latest construction photos attached below. More to come later this week.

Regards,

DJ Miller
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Last edited by FlyBack : 02-22-2011 at 09:16 PM. Reason: Resumed work on it
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  #8  
Old 02-22-2011, 09:18 PM
FlyBack FlyBack is offline
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Default Specs

For the engineers out there:

Here are the preliminary specifications. Latest photos added to post #7 above.

Preliminary Specs:

Wing Root Chord (A): 6.0

Wing Tip Chord (B): 4.375

Wing Sweep Distance (S): 5.375

Wing Half Span (Y): 21.75

Stabiliser Root Chord (AA): 5.5

Stabiliser Tip Chord (BB): 3.625

Stabiliser Sweep Distance (SS): 2.875

Stabiliser Half Span (YY): 6.0

Distance between both LE's (D): 17

Static Margin 12.5 %

Mean Aerodynamic Chord MAC = 5.23

Sweep Distance at MAC (C) = 2.55

From Root Chord to MAC (d) = 10.31

From Wing Root LE to AC = 3.85

From Wing Root LE to NP = 5.63

From Wing Root LE to CG = 4.98

Wing Area = 225.7

Stabiliser Area = 54.8

Wing Aspect Ratio = 8.39

Tail Volume Ratio, Vbar = 0.73


Aircraft Weight (estimated) : 12.7 ounces

Max Lift Coefficient : 1.0

WING LOADING : 7.85 oz/sq.ft

CUBIC LOADING : 6.27 oz/cubic.ft

STALL SPEED : 13.9 mph



FlyBack
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Last edited by FlyBack : 02-23-2011 at 09:59 PM. Reason: Added dimension drawing
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  #9  
Old 02-23-2011, 11:05 AM
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jharding58 jharding58 is offline
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A very nice looking boost glider. You have really got a flair with design. How much will you have to reduce the elevators at the vertex so they do not foul each other on down?

I recall seeing a Zuni with a 24mm mount located just at the dihedral break with a slight tail high configuration to allow the exhaust to clear the V tail. I think the tail was also finished in matte black to further reduce the cleanliness issues.
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  #10  
Old 02-23-2011, 09:35 PM
FlyBack FlyBack is offline
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Default Fuselage Sides

Quote:
Originally Posted by jharding58
How much will you have to reduce the elevators at the vertex so they do not foul each other on down?


Thanks,

The clearance on the ruddervators is about a 1/2 inch. I used 3/16 inch balsa for the side pieces. They were preformed by first soaking in an amonia/water mix then taping in place. After 24 hrs they take on a permanent set. The corner strips will be done the same way.

Regards,

FlyBack
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