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Old Jul 20, 2014, 05:02 AM
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Joined Jul 2014
49 Posts
Build Log
F-19A Steath "Specter"

in the mid 80's to early 90's just before the release of the F-117 nighthawk a lot of hype followed the mysterious stealth aircraft and from that various plastic model companies produced concept art and a kit.

In 1987 monogram released their concept & speculation of what a theoretical stealth aircraft could look like:




Phase 1: the goal and plan.
This build log is my attempt at producing a balsa wood scratch built RC version of this inspiring aircraft.

To start I took the monograms "Blue prints" and literately dropped it into paint and printed it over 6x6 pages:

From here I removed all boarders and squared every page to fit in a near seamless 6x5 blueprint to work off of.

Since the drawing isn't square set, I broke it down into mirror images and all measurements taken are from a center-line that I drew in.

Phase 2:
Attain parts to augment redesign segments of the plan that do not work with the parts I have available.
  • Parts List:

    Radio:
  • Specktrum Dx6i
  • AR6115e 6Ch Receiver
  • 4x -> Servo: DSP75
  • 4x -> E-Flight DSP76
  • Orange RX 3-Axis Flight stabilizer vs 2.0

    Power:
  • E-flite DeltaV 480 65mm EDF
  • Hobby people 14.8 Volt 2220maH 4s Lip T-conn
  • E-Flite 40-Amp Lite Pro SB brushless ESC {V2}

    Landing Gear:
  • 3x - > 1-3/4" Low bounce Treaded wheels 1/8" Axle diameter
  • 6x -> Hobby People Retracts Micro electric 4lbs, ho hdwr { 2 are back ups since they where cheap and 1 broke}
  • 1/8" piano wire { bent and shaped into landing gear struts}
  • 12" heavy duty servo extension
  • Triple Plug y-Harness

    Building Mats:
  • Wood:
    1. 3" x 36 " x 1/8" balsa - 9 sheets {body frame}
    2. 4" x 36" x 1/8" balsa - 1 sheet {body frame}
    3. 3" x 36" x 3/32" balsa - 9 sheets {wing spars}
    4. 1/32" x 4" x 36" balsa - 15 sheets { wing, body, and engine ramp covering}
    5. 1/8" x 36" x 1/8" balsa - 36 strapping strips {support cross members}
    6. 3/8" x 36" * 1/4" balsa - 2 straps { wing leading edge}
    7. 3/16" x 12" x 24" plywood - 1 sheet { engine & landing gear support}
    8. 4"x4"12" balsa block { Canopy former}
  • Great planes medium nylon pinned hinges {36}
  • 36 -> #4 x1/2" wood screws -{ Landing Gear and EDF mounting to plywood: screw points grinned off}
  • 4x -> 2-56 {1/16"} 2x threaded couplers
  • 4x -> Standard hooded push-rod exits
  • 12pcs -> 2-56 threaded Steek Clevis
  • 12pcs -> Screw-Lock Pushrod Connectors
  • 2x Hatch Latch {for battery tray & receiver}
  • 4x -> Micro2 Control horn
  • 2x -> 1/2a Control Horn
  • Spektrum Gyro Tape
  • Velcro double sided tape {battery holding}
  • 10x Strong Rare-Earth Button Magnets {canopy bay holding}

    Wiring: { not all are used bulk ordered to save some $$}
  • 10x 40 Cm servo lead
  • 10x 10 Cm male to male lead
  • 10 x Y-cable 30 Cm
  • 10 x 30 Cm Servo lead
  • 10x ec3 male/female plugs {fixed a melted connection}
  • 10x Servo Terminals (JR) Gold Plated {fixing broken connectors if it happens}

    Tools:
  • Hobby Knife
  • Dremel & accessories
  • zap a gap glue
  • Drafting table
  • Drafting tool kit {straight edge, squares t-squares etc}
  • Compass set
  • Wire bending tool set: bench vise
  • Writing utensils
  • JigSaw
  • Level
  • Drill & bits
  • Sand Papper
  • soldering iron, flux and solder
  • Needle nose pliers, Linesman pliers
  • Sewing Pins : using them as {T-Pins}
  • Jewelers Screwdriver set
  • Cutting Mat
  • Box Saw
  • Du-Bro Hinge Slotter kit
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Last edited by Strmckr; Nov 12, 2014 at 12:40 AM.
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Old Jul 20, 2014, 08:43 AM
Oh no, not again!
jhspring's Avatar
United States, LA, Carencro
Joined Dec 2005
5,598 Posts
This is a really cool project. Your MSPaint printouts are world's neater than mine. I imagine that the aerodynamics of this one will be "interesting." Are you considering using a 3-axis stabilizer for the maiden?

Regards,
Jeff
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Old Jul 20, 2014, 09:03 AM
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aymodeler's Avatar
United States, CT, Hartland
Joined Jul 2011
191 Posts
+1 - very cool project.

I actually have a Testors plastic kit sitting in my basement from the same time period. Their version of the "F-19" had a bit of a different look: https://www.google.com/search?q=testors+f-19&tbm=isch.
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Old Jul 20, 2014, 03:07 PM
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Joined Jul 2014
49 Posts
Yes I'm considering running a stabilizer. I designed this in x-plane flight Sim years ago and I don't have those planes anymore however; I distinctly remeber it having a tendency to nose lift and stall and flip overfrequently.
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Old Jul 20, 2014, 08:23 PM
This is kid stuff.
Mazzepa1's Avatar
USA, AR, Harrison
Joined Aug 2010
966 Posts
Wow
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Old Jul 21, 2014, 02:33 AM
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United States, TX, Cedar Creek
Joined Feb 2006
34 Posts
My fantasy plane...

I hope my intended large-scale foamie will be airworthy, even if it's intended to be a display (I can imagine the fly-overs, already)...

"Base, we have what appears to be some sort of stealth missile, and assorted rocketships, in a driveway, East of ABIA. Please advise, over."

I believe that the RC model that was built in Germany was stable, but cannot confirm that...

Not going to be many that follow this as thoroughly as I will!

She's a beaut! Keep up the great work!
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Old Jul 21, 2014, 02:03 PM
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Revell also made one similar Testors concept :
http://www.mojehobby.pl/products/F-1...h-Fighter.html

Of the three model manufacturers Testors was the most popular; In fact Testor's kit became one of the best selling plastic model kits in history selling well over 700,000 copies.
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Old Jul 23, 2014, 03:57 AM
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updated
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Old Jul 24, 2014, 08:23 PM
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Argentina, Capital Federal, CF
Joined May 2011
202 Posts
You have to be very brave to build that plane. check the weight and lipo combo, ducted, bec. good luck!!!!
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Old Jul 24, 2014, 10:43 PM
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never mind figured it out:

B.E.C -> battery elimination circuit..

this one might take a while to figure out:

i know the esc has one built in but might not be enough considering --- still debating on running 8 micro servos for flight control systems + 3 built in servos in the landing gear
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Last edited by Strmckr; Jul 25, 2014 at 04:47 AM.
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Old Jul 29, 2014, 03:48 AM
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Getting there
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Old Jul 30, 2014, 01:54 AM
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Anhedril created at 20 degree drop from engine mount hight to top of wing hinge location.

Fabricated wedge inserts to tilt the wing latterly off the body frame, and glued them to wing.

Created a wing half spar parallel to the body and straight through it as one piece. From there I slid. the wing over it cutting out the spar location as Imoved it into position.
Once. Together pinned and. Glued it down.
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Old Aug 05, 2014, 03:33 PM
This is kid stuff.
Mazzepa1's Avatar
USA, AR, Harrison
Joined Aug 2010
966 Posts
Very nice work.

I especially like the sheeted wingtips and spoilerons.

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