An all around low-wing sport model based off a 1970's classic.
The Sky Ranger 40 is as much fun to build as it is to fly. Using updated design techniques and laser-cut precision, we've designed this kit so most any modeler can successfully assemble it in a short amount of time.
This all-around sport model's retro design looks great in the air and makes you look like an ace pilot. Loop it, roll it, spin it, snap it, and just have a great time flying it.
Power the Sky Ranger 40 with either an electric or glow powerplant. We've designed the fuselage with a built-in hatch so you have quick access to either your LiPo batteries or fuel tank.
Specifications:
Wingspan: 60 inches
Wing Area: 527 square inches
Length (airframe only): 42.75 inches
Weight: 3.5 - 4.5 pounds
Radio:
4 channel system
2 40-70 in./oz. servos for elevator and rudder;
2 40-70 in./oz. servos for ailerons;
o 1 40-70 in./oz. servo for throttle (if using a glow engine)
Power:
Electric (minimum 800 watt motor, 80 amp ESC, 4-5S LiPo)
Glow ( .40-.45 engine, 6 ounce tank, fuel tubing)
Additional items needed to complete the Sky Ranger 40 kit:
4 channel radio and servos
Propeller
Engine/Motor mount & mounting hardware
"Y" servo harness (for ailerons)
Pushrods (two 5" for ailerons, two 24" for elevator & rudder, one 12" for throttle if glow powered)
Clevises for the pushrods (8 if electric, 10 if glow).
Two 3" diameter main wheels
1 - tailwheel
Covering
Features of the Sky Ranger 40 Kit:
A Great Sportster Whether you like gentle cruising, or prefer to tear up the sky, the Sky Ranger 40's wide flight envelope makes it a blast to fly!
Premium USA Hardware Included in each Old School Model Works kit is a premium hardware package. We only source our hardware from brand-name, USA manufacturers to guarantee the best quality.
WEB-LOCK ConstructionThere's nothing else like it. Build our wings, straight and true - with a minimum amount of fuss.
Rugged 3/16" Main Gear We include sturdy, pre-bent main gear and wheel collars. The 3/16" diameter wire can absorb quite a bit of abuse for those no-so-good landings.
Front hatch Held in place with magnets, this hatch gives you easy access to batteries or fuel.
Windscreen Also included is a clear, pre-formed plastic windscreen.
All Old School Model Works kits feature:
Precision laser-cut parts Included in every Old School Model Works kit are all the wing ribs, fuselage formers, and other wood needed to build the aircraft.
Interlocking parts We've engineered each kit to give you the best chance of success. Each laser-cut part interlocks with the next for an accurate and secure joint.
Rolled Plans Each of our kits contains a set of rolled plans, never folded. They are full-size, highly detailed, and computer-drawn for accuracy.
WEB-LOCK Wing Construction Our exclusive wing design and construction techniques give you everything you need to easily build a straight and true wing with a minimum amount of fuss.
Due to high demand, allow at least 2 weeks or more for shipment.
The stock factory tail wheel setup on a slow stick is weak. Use this light weight mounting block to build a steerable tail wheel mount. Bend your wire gear out of .055 music wire (Part # KS503) and your all set. Notice in the photo how simply we connected ours to the rudder pushrod. What? No glow line in the field box? We've got that material also. Combine with a .063 (1/16") wheel collar (Part # DUB137)to lock the wire in place (works like our nose gear retainer) and your all set.
Notice the bending pattern (non critical) that we are setting it up so the elevator is 1.5-2" off the ground. The idea is to leave a little range for shock absorbsion so you don't strip a servo gear if you smack the tail. It's not only about having stearing. ;-)
Dimensions: 0.96 x 0.43 x 0.96 in. (24 x 11 x 24mm) Weight w/Wire: 8.4grams/0.3 oz. Torque (4.8V) 1.5kg-cm/21 oz.in. Transit Time: (4.8V)0.12 sec./60?.
Comes with universal connector, two control arms, & mounting screws.
The SC-1252MG is a high speed, low profile servo which combines leading edge technology with super high 12 bit (4096) resolution. Ideal for 1/10 on-road cars where space is limited and speed is desired.
Features:
Metal gear train ensures durability under harsh situations.
Ideal for 1/10 on road vehicles.
Aluminum case provides cooler operating temperatures.
Specifications:
Torque @ 4.8v - 4.5kg/62.5oz-in
Torque @ 6v - 7.0kg/97.2oz-in
Speed @ 4.8v - 0.08 sec/60 deg
Speed @ 6v - 0.07 sec/60 deg
Dimensions L x W x H (mm): 40.8 x 20.2 x 25.4
Weight: 44.5g
Operating Temperature: 14° - 122°F (-10° - 50°C)
Running Current (no load): 150mA @4.8V, 180mA @6.0V
Stall Current (at locked): 2000mA @4.8V, 3000mA @6.0V
Idle Current: 5mA @4.8V, 5mA @6.0V
Wire Length: 300 +/- 5mm
Output Gear Spline: 25 Tooth
Bearings: 2BB
Operating Travel: 90° (1000 -> 2000 μ second)
Neutral Position: 1500 μ second
Pulse Width Range: 950 -> 2050 μ second
Maximum Travel: Appx 160° (700 -> 2300 μ second)
Refresh Rate: 240 Hz
Motor Type: Brushed
Discontinued, while supplies last, 2 LEFT IN STOCK!
FREDe(TM) (300) is a ToonScale(TM) version of Eric Clutton's F.R.E.D. (Functional Runabout Experimental Design) FREDe's airframe frames quickly thanks to precision laser cut components and simple yet thoughtful engineering. This rugged design features our shock mounted landing gear system and soaks up all the bumps and bruises a beginner can deliver. FREDe dishes out stable predictable performance with pro pleasing "fun" on tap allowing for all rudder, elevator, throttle aerobatics including flat and falling leaf flat spins! FREDe - because flying should be FUN!
Made in Colorado, USA
Specifications:
Wing Span: 27 in
Overall Length: 23 in
Wing Area : 265 sq. in.
Flying Weight: 12.5 oz
Wing Loading: 6.8 oz/sq. ft.
Controls Required: 3 channel, R/E/T
Construction: Balsa / Ply
Category: Park Flyer
Includes:
Illustrated instruction manual
Hand selected laser-cut AAA balsa and hardwood stock
Full length leading edge, turbulator, and spar wood stock
Pre-bent wire landing gear
Profile pilot and scale motor detail
Comprehensive hardware package
Required Electronics (or similar):
Brushed Motor*: GWS 350C-CS 5.33:1
Speed Control: 10A
Propeller: GWS 10x4.7 SF
Battery: LiPo 7.4V 800 mAh (25C)
Servos: Hitec HS-55 (2 required)
*This product was originally designed for a GWS brushed power system. These are no longer widely available. The upgrade path to brushless is given below:
Motor: Sport Park BL370 (1100KV) - requires EFLM1915 Motor Mount
ESC: 20A
Propeller: APC 9x4.7 SF
Required finishing items:
Trexler #6-G Balloon Wheels or similar 3.5 inch diameter foam wheel
Our F3P biased servo horn used by many top competition pilots. 4 peices per sheet. Control Radius .625" (Equivelant to 1.25" spread servo horn). 6 Holes are offset in 6 degree steps starting at 5 degrees and ending at 35 degrees. Holes are precision drilled at .031 to be snug zero slop fit to common .032 pin control rod fittings and music wire. May be sewn and glued to many standard horns. Laser cut from 1/32 aircraft grade plywood. Strong and light weight. I've never had a report of a broken horn. SKU Number: RRCF3PBSH2
When developing the Four-Star 40, SIG had two main design goals: First of course was impeccable flight performance, including the ability to perform any aerobatic whoop-dee-doo you can throw at it. Second, it had to be ultra-simple to build without looking like a "box with wing".
Kit Features: Lite-Ply Fuselage Construction, Pre-Cut Sheet Balsa Tail Surfaces, Durable Aluminum Main Landing Gear, Formed Tailwheel Wire, Molded Clear Plastic Canopy, Full Size Plans, Fast-Building Wing with Spruce Spars, Photo-Illustrated Instruction Book, Engine Mounts, Sig Easy Hinges, Pushrods, Complete Hardware Pack & Large Decal Sheet.
Wingspan: 59 3/4 in 1518 mm Wing Area: 604 sq in 39 sq dm Flying Weight: 4 3/4 lb 2150 g Length: 47 in 1194 mm Radio Required: 4 Channel, 4 Servos Recommended Engines: .30-.40 cubic in (4.9 - 6.5 cubic cm) 2-Stroke, .40-.50 cubic in (6.5 - 8.2 cubic cm) 4-Stroke
Special notes about electric from Dave: This model makes an excellent electric conversion. I've seen many of them done and they fly well. Plenty of wing area and a light weight design. Below are my suggestions for a range of practical power systems.
Setup and Performance Chart
Motor
# Cells
Prop
Amps
Watts In
RPM
Thrust oz.
Pitch Speed MPH
Climb FPM
Est. Top Speed
Himax 3522-0990
3
12x6
41.7
469
8,470
62
48
1377
53
Himax 3528-800
3
12x10
37.4
421
6,950
66
54
1260
56
Himax 3528-800
4
11x7
36.6
549
9,770
65
68
1674
61
Himax 3528-1000
3
12x6
44.5
501
8,690
49
64
1490
54
Himax 3528-1000
4
11x5.5
51.4
771
11,660
61
85
2177
64
Himax 3528-1000
3
12x6
44.5
501
8,690
49
64
1490
54
Himax 5018-530
5
12x8
30.5
572
8,560
65
76
1839
63
Himax 5018-530
6
12x8
40.5
911
9,930
75
104
2766
73
Estimates based on manufacturers provided constants using E-Calc. High Quality 2100-3000mah used as trial cell in calculations. Presumed model weight of 76oz. @3 cells (added oz for higher cell counts). Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of battery, ESC, and many other factors.
This material shrinks easily with your covering shrink gun, lighter or other heat source. After shrinking, this higher quality tube stays flexible keeping your strain relief plans intact. Shrinks about 50%. 1/16 and 3/32 sizes are most popular for individual servo and park flier pack wires. 1/8" for strain relief on 2 pole 22 gauge battery pack wire, larger sizes for larger wire. Shown at right is 3/8" for locking together servo connectors you won't be able to easily inspect later. Measurement is inside diameter. Very economical to keep plenty of this material on hand. You'll find many uses, we even use the smallest size for wheel collars on some of our kits! Hint:In a pinch? Short sections of tubing can be opened up 25% to 50% larger with hemostats or fine needle nose pliers Sold in multiples of 3' lengths.
Y harness. 10" long. Use to run two servos off one channel output on RX. JR connector style, 26 gauge Standard duty wire, gold connector pins. SKU Number: RRCYSTDJR
We packed as much brute power and intelligence into this tiny layout as we possibly could and came up with a 15 amp* controller with ability to sustain an 8 amp BEC! Talon 15 measures just 1.1" long and is under 0.6" wide! At nearly the size of a quarter, this ESC supports an outlandish 8 amp** peak BEC with output voltage of 5.5 VDC. Applications range from foamies to micro and sub-micro helis running up to 4S and pulling 15 amps. As with any Castle ESC, the Talon 15 offers Castle's industry-leading functions, not to mention easy programming using the Castle Link USB adapter (coupon for free Castle Link included), or the Castle Field Link Portable Programmer (sold separately).
Notes from Dave: This is a world beater ESC. Now we can run high voltages in our smaller models with a small tight ESC from a quality manufacturer. I'm very excited to put one of these in my 5S, 16 ounce Stick 400. Sweet!
Input Voltage: 2-4 Lipo Max Continuous Amperage: 15* BEC Voltage: 5.5v BEC Amperage: 3 Continuous, 8 Surge** Switching Rate 7,000 Hz Resistance 0.0065 Ohms Brake yes, programmable Reversible yes - change any two wires Size .058 x 1.1 x 0.32 in. Weight (w/wires) 0.25 oz. (7.2g) Universal connector
*RC HOBBY APPLICATION RATING: 15 amps for the duration of a single 4,000 mAh battery pack with the ESC in contact with a 5 mph airflow of 25C (77F) or cooler air. Controller temperature must never exceed 100C (212F). Exceeding current or temperature ratings may damage components and may shorten the life of the ESC. Always verify system current draw at full-throttle. Decrease load or increase airflow to decrease the ESC's operating temperature.
**Peak indicates amperage sustainable for most servos' current draw transients. Always confirm servo current draw before the first flight of the model.
Tidy up and protect your servo wire. 10mm fits over servo cables. Works like Chinese finger cuffs, push ends toward center of piece to open up to insert wiring. Very nice for heli applications, keeps wires from straying and protects from friction damage. 3-foot packs available in Orange & Yellow. See other listings for color and size options.
Solder Kwik-Links are nickel plated making a strong, attractive and easy to solder connector for servo or horn. 4-40 Solder Kwik-Link designed solder onto .093 diameter wire which is typical size found with rolled 4-40 threads on one end. Spring keepers included, shown in bulk package photo. SKU Number: DUB604
This material shrinks easily with your covering shrink gun, lighter or other heat source. After shrinking, this higher quality tube stays flexible keeping your strain relief plans intact. Shrinks about 50%. 1/16 and 3/32 sizes are most popular for individual servo and park flier pack wires. 1/8" for strain relief on 2 pole 22 gauge battery pack wire, larger sizes for larger wire. Shown at right is 3/8" for locking together servo connectors you won't be able to easily inspect later. Measurement is inside diameter. Very economical to keep plenty of this material on hand. You'll find many uses, we even use the smallest size for wheel collars on some of our kits! Sold in 3' lengths, typically comes in black, color shipped may vary. Sold in multiples of 3' lengths.
Long leg Y harness. Need to drive 2 servos in a tail that are close to each other but far from the receiver? Here is a special part to solve some of those special problems. The Arms are fixed at 3" for all sizes. The Leg is available in variable length. Select leg length below. 22 gauge heavy duty wire. Note: JR harnesses on left and Futaba J on right. SKU Number: RRCY__L03AJR
Our set includes the Crimping Tool, Wire and Pin Kits you need to get started making your own connector ends, Y's and extensions.
Included: 25 Feet JR/Spektrum Color Coded Servo Heavy Duty Twisted 22ga Wire 10 each Male End Connectors 10 each Female End Connectors Radcial RC Connector Crimp Tool
New Du-Bro Mini E/Z Connectors. Light weight aluminum (0.25g). 2-56 machine screw locks, max wire diameter. is 0.47. Press fit on Du-Bro Mini Servo Arms and most others. Great for indoor and park flyers! 12 units per pkg. SKU Number: DUB915
This material shrinks easily with your covering shrink gun, lighter or other heat source. After shrinking, this higher quality tube stays flexible keeping your strain relief plans intact. Shrinks about 50%. 1/16 and 3/32 sizes are most popular for individual servo and park flier pack wires. 1/8" for strain relief on 2 pole 22 gauge battery pack wire, larger sizes for larger wire. Shown at right is 3/8" for locking together servo connectors you won't be able to easily inspect later. Measurement is inside diameter. Sold in multiples of 2' lengths.
We can hand make Y harnesses to almost any specification. Our 20 gauge silicone Y harnesses are as heavy as they get. Great where heat is a problem or very high servo loads are expected. Use these special harnesses to reduce the connectors (and resistance) in your electrical system. Also, there is nothing like a tidy radio compartment and a proper length harness can help you get there. Use the drop down menus to indicate your preferences. Generally we size these by measuring from the back of each connector. So the overall length will be greater by connector shell length.
Twisted wire can be adjusted slightly in length by changing the number of twists. We try to get within about 1/2" of your spec. Please order long enough to compensate for minor variance.
Note: Stock machine made sizes and are lower cost and can suit many needs, find them in the connector category to fit your specific brand.
KEY: Think of a 1 legged stick man, the RX connector is the "Leg" and each side of the "Y" that connects to a servo is an "Arm". Our part number for you special Y reads as such if you prefer to mail in your order: CYSIL__L("leg)__A("Arm)__A("Arm).
Fasteners, Bracket and drive spring included. Intended to be driven by rudder through spring. Drawing and instructions included. Can be set up as castoring or steering. Choice of 2 different steering springs. Absorbs shocks so loads are not delivered directly to your servo gears. 1/8" (3.2mm) spring axle. Wheel and wheel collars not included. Example photo from Sullivan is of smaller wire size gear. Actual product is much stronger. SKU Number: SUL862
Use with Hitec X-Series (X2,X4,X4 Eighty, X4+ etc...) chargers and probably many other chargers that have Temp Sensor capability. Uses 3 wire servo input connector setup. Allows charger to use temp information for peak charging or other purposes. SKU Number: HRC44159
This material shrinks easily with your covering shrink gun, lighter or other heat source. After shrinking, this higher quality tube stays flexible keeping your strain relief plans intact. Shrinks about 50%. 1/16 and 3/32 sizes are most popular for individual servo and park flier pack wires. 1/8" for strain relief on 2 pole 22 gauge battery pack wire, larger sizes for larger wire. Shown at right is 3/8" for locking together servo connectors you won't be able to easily inspect later. Measurement is inside diameter. Very economical to keep plenty of this material on hand. You'll find many uses, we even use the smallest size for wheel collars on some of our kits! Sold in 3' lengths, typically comes in black, color shipped may vary. Hint:In a pinch? Short sections of tubing can be opened up 25% to 50% larger with hemostats or fine needle nose pliers.
We can hand make pigtails to almost any specification. A "pigtail" is a wire with only one connector. Use to repair servos, switch harnesses or perhaps add to existing servos for that "Extension Free" custom installation. Choose from drop down menus your preferences. Generally we size these by measuring from the back of each connector. So the overall length will be greater by connector shell length. Twisted wire can be adjusted slightly in length by changing the number of twists. We try to get within about 1/2" of your spec. Please order long enough to compensate for minor variance.
Note: 2 wire battery pigtails in 6", 3 wire pigtails 10" and Micro Lite at 5" are available in machine made sizes and at lower cost, find them in the connector category to fit your specific brand. Check there first to see if any stock sizes will meet your needs.
Micro Lite: This type of wire is used most commonly in applications with small servos (.5 oz weight or less usually) in park flyers, foamies, sailplanes, DLG's and other models with low servo loads. You can save a bunch of weight eliminting beefy stock wiring from these smaller models.
26 Gauge Standard: This wire is what you find in most new radio sets and on most mid size to full size standard torque 4 screw mountable servos. This ribbon wire size is a good wire choice for those types of servos (and smaller) if the runs are 24" or less. Good for smaller servos in long runs such as sailplane wings and similar. For example, great for you 60" cub but use 2o gauge your outfitting a 100" Cub.
22 Gauge Heavy Duty: Use for all larger models and anyplace a high torque or digital servo might be used. Use for standard torque servos if your runs are very long (over 24")
Sometimes it's hard to tell the boys from the girls. Servo and battery ends are "MALE", RX's and Y harness receptacles are "FEMALE". When the pins are hidden, connectors are gendered by the shell. Just remember as an "assembly", a servo or battery plug fits inside an RX or Extension therefore it's male.
Hitec Feather servo control horns. White nylon material. These horns have holes correct for 1/32 wire used in all the smallest servos. Will fit only Hitec 50 and 55 servos. See images for Hitec's diagram and chart.
 "Old School Model Works Sky Ranger 40 Kit")
 "Slow Stick Tail Wheel Mounting Block Kit")
 "Blue Bird 8g Micro Servo")
 "Savox SC-1252MG High Speed, Low Profile Servo")
 "Futaba G Servo Extension Harness 39\"")
 "FREDe 300 ToonScale Slow Flyer by Stevens AeroModel")
 "F3P Biased Servo Horn #2")
 "Sig 4 Star 40")
 "3/64\"/1.0mm Flexible Shrink Tubing for Wires, 3-Foot Pc BLACK")
 "Servo Y Harness JR Standard Duty 26ga")
 "Castle Creations Talon 15")
 "Mesh Looming Wire Guard 10mm Orange")
 "Du-Bro 4-40 Steel Spring Solder-On Kwik-Links for .093 Wire Bulk 12-Pack")
 "3/32\"/2.4mm Flexible Shrink Tubing for Wires, 3-Foot Pc BLACK")
 "Super Tail Y Harness Long-Leg JR/Hitec/Airtronics Z(new)")
 "Radical RC Wire-Crimper-Connector Set JR/Spektrum/Hitec/Airtronics Type")
 "Du-Bro Mini E/Z Connectors up to .047 wire 12-Pack")
 "19/32\"/15mm Flexible Shrink Tubing for Wires, 2-Foot PC Black")
 "Sullivan Tail Wheel Bracket 16 to 35 Pound Aircraft")
 "Hitec Temp Sensor")
 "3/32\"/2.4mm Flexible Shrink Tubing for Wires, 3-Foot Pc")
 "RRC Extension Harness 78\" (200cm) Buffered/Filtered Futaba J")
 "Hitec Horn Set for HS-50/55")
