The Sport Air 40 stands out as one of the more visually appealing aircraft in the 40-size market, thanks to its clean lines and striking resemblance to several full-scale light aircraft.

This excellent all-around sportster will attract many favorable comments at the flying field, not only because of its good looks, but also because of how great it flies.

As with every Old School Model Works kit, our Sport Air 40 is a build-it-yourself airframe, designed and laser-cut from high quality balsa wood and light ply.

Included are new, simplified building features as well as laser-cut precision and self-aligning parts to make this all-time favorite even better. For example, our exclusive Web-Lock construction makes building the wing panels a snap. Rather than the sheer webs being an afterthought, they are utilized during the build to properly space, position, and lock in each rib.

We have completely updated the airframe with laser-cut and self-aligning parts. The fuselage is built around a self-aligning, light-weight box for added strength. Surrounding this is the outer balsa skin, which is strong, light-weight, and twist-resistant even when performing high-stress maneuvers. The balsa/ply airframe makes the Sport Air 40 uncomplicated, lightweight, and easy-to-build.

Power can come from glow or electric powerplants. We've designed the fuselage with a magnetic top hatch, so you have quick access to either your fuel tank or batteries. Also the tray can be removed to give access for mounting an ESC or flight pack battery.

Another thing you'll notice is that the Sport Air 40 has a bit more ground clearance than a typical 40 sized design. It's longer landing gear give you the ability to easily fly from grass fields.

When it comes to aerobatics, the Sport Air 40 doesn't disappoint. While it may not be as precise as a dedicated pattern bird, it is incredibly forgiving and can easily perform a wide range of maneuvers. Even with the controls increased for aerobatics, landings are one of the Sport Air .40's strong suits, due to its excellent low-speed stability. Our Old School Model Work's Sport Air 40 is a Vintage R/C Society legal design for enjoying vintage fly-ins and contests.

Specifications:

•  Wingspan: 58 inches
• Wing Area: 638 sq. inches
• Length (airframe only): 43.5 inches
• Weight: 4.5-5.5 pounds RTF
• Radio: 4 channel
• 4 40-70 in./oz. servos (Standard servos - similar to HS-311)
• 1 additional servo for throttle, if using a glow engine

Power:

•  Glow (.35-.46 engine, 6 ounce tank, fuel tubing)
• Electric (equivalent brushless motor - 600+ watt, 80+ amp ESC, 4S LiPo)

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.

Interlocking Construction

There's nothing else like it. Our interlocking construction allows you to assemble the entire airframe with a minimum amount of fuss.

Front hatch

Securely held in place with magnets, the Sport Air 40's hatch gives you easy access to batteries or fuel.

Glow or Electric power

Power the Sport Air 40 with either a glow or electric powerplant.

VRCS legal kit

Our Sport Air 40 is a Vintage R/C Society qualifying design making it eligible for vintage/retro events.

Design your color scheme

Download this sheet to design your Sport Air 40's color scheme.

Additional items needed to complete the Sport Air 40 kit:

•  Propeller
• Engine/Motor mount & mounting hardware
• "Y" servo harness (for ailerons)
• Pushrods (two 6" for ailerons, two 26" for elevator & rudder, one 12" for nose gear, one 12" for throttle if glow powered)
• Clevises for the pushrods (10 if electric, 12 if glow).
• Wheels: 2.5"
• Covering (typically 2-3 rolls)
• Optional 2.25" or 2.5" spinner
  
  
  

"Get in quick. Punch Hard. Then Get Out!"

Fast, but not too fast. Maneuverable, agile and responsive - but not tricky. A snap to build - and with a fully sheeted airframe, surprisingly rugged compared to most.

Don't let the lack of landing gear scare you. Hand launching is easy because of the fuselage's light weight and strengthened design. In the air, it really looks the part without any exposed gear to detract from it's clean lines. Bringing the Fifty-One in for a belly landing on grass is just as easy.

You should see them take evasive maneuvers in Dog Fighting. Evade with snap rolls into spins, Immelmann turns and a loop.

OSM's Fifty-One kit is part of our Sunday Fighter lineup and just might be the most fun you've had in a long time.



Because of the interlocking design and high quality laser cutting of the parts, the Sunday Fighter is a quick build. Not only does it build quick, but it also builds straight and true as all of the parts are designed to align properly with a minimum of fuss and alignment tools.

The wing is removable for storage/transport and for giving access to the radio/servo area. From there you have easy access to install most any brand of radio and control linkages.

What's more, the fully assembled model can fit in the trunk of most cars.




Although mainly designed for electric power, you can also use a .25-sized glow engine as well. Glow engines are side mounted. Electric motors are mounted on the "extended" firewall to space the motor the proper distance forward.
When assembled, you now have a blank canvas and can apply any number of color schemes, or make up your own.
In the air, the Fifty-One is a blast to fly. A simple hand-launch gets it airborne, then you can cruise quite easily and 1/2 power. Throttle up for loops, eights, snaps, spins, hammerhead turnaounds - or maybe a screaming low-level pass, right down the runway. When you're ready to land, simply throttle back and gently bring the Fifty-One in for a belly landing on the grass.

This is just one design in our growing Sunday Fighter series.

Specifications:
Wingspan: 44.5 inches
Wing Area: 330 sq inches
Length (airframe only): 39 inches
Weight: 3 - 3.5 pounds
Radio: 4 channel system
Power:
o Glow (.25 engine)
o Electric (350+ watt, 60 amp ESC, 3-4s LiPo)

Features:

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.

Dual Ailerons
Mounted under the lower wing, these two pre-cut aileron hatches make it easy to install the aileron servos.

WEB-LOCK Construction
There's nothing else like it. Build our wings, straight and true - with a minimum amount of fuss.

Battery compartment
Perfectly sized to take 3-4s 2200 lipo packs, plus an ESC. Open design makes batteries easy to swap out, and keeps the components cool.

Under-Fuse Air Scoop
Just like the full-scale, our Fifty-One has a scoop under the fuselage. It's held in place by the wing bolts. Fly with or without it - your choice.


Additional items needed to complete this Sunday Fighter kit:
o Propeller
o Engine/Motor mount & mounting hardware
o 4-5 mini servos depending on setup: 4 flight controls, 1 for throttle if glow
o "Y" servo harness (for ailerons)
o Pushrods (two 6" for ailerons, one 10" for throttle if glow powered, two flexible 26" for elevator & rudder)
o Clevises for the pushrods (8 if electric, 10 if glow).
o 1-1/2 - 2 rolls of covering
o 3" spinner

Due to high demand, allow at least 2 weeks or more for shipment.

Our standard size mount will hold most any pack around 1350mah or less in capacity in the normal short profile. Any pack 3.5" long (88mm) or less fits nicely.

Mount stands off slightly from the fuse boom so it may be positioned to overlap our wing mounts, main gear mounts even the motor mount if you like a forward location better. We have used this mount to suspend the battery above the boom also. It could also be used for "side" mounting if you need to balance against a camera or other onboard device that is off center.

This is the first of our Sunday Fighters. The original Sunday Fighters were the brainchild of Ken Willard back in the early 1970's. His were small, .049 powered 3-channel models and proved quite popular. Now, we've taken this idea, enlarged, and re-engineered them to make them as much fun to build as they are to fly. There's a bit of Bristol, and maybe some Spad, and for good measure you might detect some Nieuport. So we refer to this one as the Bristol Spadport.

Fast, but not too fast. Maneuverable, but not tricky. A snap to build and surprisingly rugged compared to most. You should see them take evasive maneuvers in Dog Fighting. Evade with snap rolls into spins, Immelmann turns and a loop. OSMW's radio-controlled Sunday Fighter airplane kits just might be the most fun you've had in a long time.

Whether you choose to power your Sunday with electric or glow power, we've got you covered. Glow engines can be mounted side, inverted or even upright with a little modification. Electric motors can be mounted using the included Motor Box which will help space your motor to the proper distance.

Go true "old-school" with 3 channel control, or opt for functional ailerons (4 channel).

Specifications:

Wingspan: 46.5 inches

Wing Area: 725 sq inches

Length (airframe only): 34 inches

Weight: 3.5 - 4 pounds

Radio: 3-4 channel system

Power:

o Glow (.20-.30 engine, 6 ounce tank, fuel tubing)

o Electric (equivalent brushless motor, 3s LiPo)

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.

Dual Ailerons Mounted under the lower wing, these two pre-cut aileron hatches make it easy to install the aileron servos.

WEB-LOCK Construction There's nothing else like it. Build our wings, straight and true - with a minimum amount of fuss.

An 8 pack of Neo Super Magnet Discs. Size: 3/16" Dia. x 1/16" Thick. Same magnets used in our Radical RC kits to hold hatches, wing latches and wings in some cases.
Great for creative mounting of many things, even canopy's.
The screw and rubber band were invented a long time ago.
Eliminate the old time "think" of many of today's models and go fastener-less wherever you can.
Lightly scuff the surface of the magnet where it's to be glued and use epoxy as your adhesive.
CA is not recommended as it tends to let go of the magnet after a short time.
As an extra bonus your new magnets come in a handly reusable container.
You can link/snap them together to form your own sorter bin for small parts.

SPECIFICATIONS:

Wing Span: 56" / 1422mm

Wing Area: 557 sq. in. / 35.9 dm2  

Length: 43.5" / 1105mm

Weight: 14-15lbs 

Radio (not included): 4 channel w/4 standard servos (not included)

Engine (not included): 2-Stroke .25-.40 (4.1-6.0cc)

KIT FEATURES:

Built-Up Balsa Construction

Strong One-Piece Wing

Engine Mounts

Hardware Package

Spruce Wing Struts

Full-Size Plans

Molded Plastic Cowling

Formed Wire Landing Gear

Authentic Decals

Illustrated Assembly Manual

SIG BACKORDER, OUT OF STOCK

Our Comet captures all of the jet-age looks and excitement of the sleek 1950's design it's based on.
With the included jigs, this delta wing can easily be built by those with experience in constructing built-up kits. Please note that this is NOT a beginner's kit - it requires building and flying experience to be successful.

Flying the Comet is a blast. It's not overly quick and has pleasing flight characteristics that make it fun to fly. Even at low speeds it is well behaved and has no surprising tendencies. The Comet can be powered with either an electric or glow powerplant. We've designed the fuselage with built-in hatches so you have quick access to either your batteries, fuel tank & radio system.

Specifications:
Wingspan: 39.5 inches
Wing Area: 470 square inches
Length (airframe only): 32 inches
Weight: 3 - 3.5 pounds
Radio:
o 4 channel system (with elevon mixing)
o 3, 40-70 in./oz. servos for elevons and rudder;
o 1, 40-70 in./oz. servo for throttle (if using a glow engine)
Power:
o Electric: .25-sized brushless motor, 60amp esc, 3s lipo
o Glow (.19-.30 engine, 4 ounce tank, fuel tubing)
Features of the Comet
A Retro, Delta Wing
Flying the Comet is a blast. It gives jet-like looks and stability without being overwhelmingly fast. Stability at all speeds make it easy to fly and easy to land.
WEB-LOCK Construction There's nothing else like it. Build our wings, straight and true - with a minimum amount of fuss.
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.
Rugged Landing Gear
We include sturdy, pre-bent main gear, steerable nose gear assembly, and wheel collars. The 1/8" diameter wire can absorb quite a bit of abuse for those no-so-good landings.
Bottom hatch Held in place with thumbscrew, this hatch gives you easy access to batteries or fuel.
Canopy
Also included is a clear, pre-formed plastic canopy.
Additional items needed to complete the Comet kit:
o 4 channel radio and servos (elevon mixing is needed, so a radio with mixing is needed)
o Propeller
o Engine/Motor mount & mounting hardware
o Pushrods (two 5" for elevons, one 18" for rudder, one 12" for throttle if glow powered)
o Clevises for the pushrods (6 if electric, 8 if glow).
o Three 3" diameter main wheels
o Covering

Due to high demand, allow at least 2 weeks or more for shipment.

A 6 pack of Neo Super Magnet Discs. Size: 1/4" Dia. x 1/16" Thick. Same magnets used in our Radical RC kits to hold hatches, wing latches and wings in some cases.
Great for creative mounting of many things, even canopy's.
The screw and rubber band were invented a long time ago.
Eliminate the old time "think" of many of today's models and go fastener-less wherever you can.
Lightly scuff the surface of the magnet where it's to be glued and use epoxy as your adhesive.
CA is not recommended as it tends to let go of the magnet after a short time.
As an extra bonus your new magnets come in a handly reusable container.
You can link/snap them together to form your own sorter bin for small parts.

DU-BRO Nylon Wing Bolts - Secure RC Wing Fastening Hardware (4/pkg).

One of the standout features of these wing bolts is their dual-tool design. Each bolt features an outside hex head that fits your standard glow-plug or prop nut wrench, plus an inside socket designed for a standard Allen wrench. This gives you two secure, no-slip ways to tighten or remove the bolts--ideal for quick field assembly or adjustments at the workbench.

For larger models or aircraft requiring extra reach, the 3" Wing Bolts XL provide additional length for deeper mounting locations. These bolts also feature a large 0.5" diameter head that can be tightened using a Phillips or slotted screwdriver, offering even more flexibility and convenience.

Made from durable nylon, the bolts are fuel-resistant, lightweight, and designed to absorb vibration without backing out. They are also safer than metal bolts, helping to protect your airframe during hard landings or wing stress.

Each package includes 4 high-quality wing bolts, giving you a complete set for your aircraft or spares for your field box.

Proudly Made in the USA, DU-BRO Nylon Wing Bolts are an excellent upgrade for sport models, trainers, scale aircraft, and any plane that requires reliable, easy-to-handle wing mounting hardware.

Wingspan 55 1/2 in 1410 mm
Wing Area 575 sq. in. 37.1 sq dm
Weight 5 1/2 lb 2495 g
Wing Loading 22 oz/sq ft 6713 g/sq m
Radio Required 4-Channel
Recommended
Engines .29 - .40 cu. in. (4.8 - 6.6 ccm) 2-Stroke

Notes from Dave: This is absolutely my favorite glow sport ship of all time. It's a classic kit. There was just nothing more exciting on trainer night than to have a graduated student come up with one of these for his 2nd or 3rd aircraft and ask me to test fly it. I dare say, I'd put a whole tank through the model and say, yes, it's still my all time favorite! The model is very pattern like for it's size, super smooth and yet retains all the personality of weekend sport ship. Friendly yet aerobatic and even aggressive if you set the throws for more spirited performance. They land like a dream, are utterly trustworth in any situation. You'll love it as I do.

Power Packages for setups in performance chart available. Includes Castle ESC, Himax motor and APC or Zoar Prop & Lipo Battery.

Electric Setup and Performance Chart

Power Pack #	Motor	# Cells	Prop	Amps	Watts In	RPM	Thrust oz.	Pitch Speed MPH	Climb FPM	Est. Top Speed
Pack #1	Himax 3528-1000	4	11x7	46.2	687	9,490	72	61	1854	64
Pack #2	Himax 3528-800	5	11x6	37.6	699	10,430	79	57	1971	64
Pack #3	Himax 3528-1000	6	10x6	55.1	1230	13,650	102	75	2836	77
Pack #4	Himax 5018-530	8	11x7	36.7	1092	11,660	113	75	3127	79
Pack #5	Himax 3516-1350	3	10x6	41.2	460	9,550	50	54	1130	55

Estimates based on manufacturers provided constants using E-Calc. High Quality 2200-3300mah used as trial cell in calculations. Presumed model weight of 78oz. @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 kit is only shipped by Parcel Post to locations outside of zone 4 from our shop regardless of shipping method choosen.

Temporarily out of stock, pending manufacturer production 

This model is outstanding on any 400 class outrunner in the 980-1300 KV Range, 3S packs from 700-1300. Think of props from 8-4 to 9-6 depending on KV. 70 to 170 watts is the right range. The model is strong and roomy enough for 300 watts if your desire are of the insane variety.

My favorite setups so far:
Himax 2816-1220, 9-4.5 prop, 3S 1300 Kypom 35C K6 series. Around 19 amps, about 240 watts.
Himax 2812-650, 9-4.5 prop, 5S RRC or Kypom 450. Less than 10 amps! About 165 watts and super effiecient.
GWS 003 Outrunner, 8-6 prop, 3S 600-1300 size 3S pack.

Many systems will work well here. This model is a supurb sport aircraft, probably the best I have ever designed. I know it's going to become the most popular kit we've ever made. Kit comes with both Sport and Stick type flying surface options. Push button wing release, space frame formers/doublers, one or two servo ailerons and simple zip tie on landing gear are standard features.

This model is everything you expect a Stick to be and everything you expect in a Radical RC kit. Construction is fully interlocking and completely self jigging. It is actually possible to build 90% of the kit prior to applying any adhesive. In fact, most of the assembly is squeezing together friction fit -n- tab self jigged assemblies and applying thin CA sparingly at the conclusion of each assembly. Fit is so good, only the most minimal amount of sanding is needed prior to finish application.

Model is designed specifically for E-power. Predrilled firewalls are included as are blank firewalls and a more short nose mounting location if you want to go 1/2 A glow. And, it's not needed since you finished glow flying weight will be about 14-16oz on glow. Model is expected to finish 13-18oz. One of my samples weighs in at 16oz. the other at 17oz. Normal weights for high performance sport aircraft with these capabilities and landing gear is 24oz or more.

Instructions include complete breakdown on motor system choices and theory for this model. Because it's so light weight, you can have a legitimate 2S system here. Our prototypes are flying on 3S (foreground) and 5S (background).

Model is built with conventional 1 or 2 servo - 2 aileron wing. May be upgraded to 3D surfaces with our optional 3D Surface Kits. With 3D Surface Kit you can run 2 servo big ailerons or 4 servo split aileron/flaperon combo. Expanded surface for elevator and rudder included as in photo. Note, the 3D Surfaces Kit only works with the "Sport" Vertical Stab.

EZone discussion about this kit.

Specifications:
Wing Span: 34.4 avg.
Wing Area: 253.5 sq."
Length: 27.9"
Weight: 14-18 ounces
Power: 70-200 Watts (70-200 watts per pound)
Laser Cut Parts: 163

Coming soon, production pending.

Other uses are possible, perhaps you want to put a boom up above your wing to hold motor or camera above prop. Use your imagination with this special kit.

On model in photo parts are colored black with permanent marker. Made from laser cut 3/32 Aircraft Plywood. This kit offsets second boom with 4 3/8" gap.

SKU Number: RRCSSOBM

This Kit allows a "do-it-yourselfer" to build your own custom switch and LED accessory for SwitchGlo Pro. The Push-Button is a secondary glow trigger while on the ground and the LED is for visual confirmation that your glow-plug is infact glowing. Highly recommended for the Scale-Modeler who wants an On-Board Glow Indicator while in flight, but also keep the most realistic look without having unnecessary cut-outs in the body of the aircraft. Now you have the freedom to mount an extra LED and Pushbutton anywhere on your craft.

UPC code:819326010316

Designed for Helis
Talon 90 is ideal for helicopters drawing 2,000 watts on 6S. It's a great fit for extreme 500 and 550 class helis and sport (6S) 600 setups, and offers Castle's industry-leading helicopter functions, such as the unbelievable direct entry governor mode.

Great for Fixed Wing
Talon 90 is perfect for aerobats up to 10 pounds and scale ships up to 20 pounds.

Features:

Beefy 20 amp peak (9 amp continuous)
5.5mm horizontal motor connectors installed, battery connectors sold separate
Innovative case ensures cooling in even the toughest mounting locations
Programmable via Castle Link Adapter (coupon for free Castle Link Adapter included with purchase) and a Windows PC, a Castle Field Link (sold separately) or the Castle Link iOS App and a B-Link Bluetooth Adapter (sold separately).
Audible alerts for error conditions
Telemetry compatible with purchase of Castle Telemetry Link for S.BUS2 (Item # 010-0152-00) and compatible Futaba Radio or Castle Telemetry Link for X-BUS (Item# 010-0148-00) and a compatible Spektrum Radio.
Designed, manufactured, and supported from Olathe, KS USA

What's Included:

Talon 90
(3) 5.5mm male bullets
Talon User Guide
Talon Quick Reference Guide

Talon 90 delivers premium performance and features at an amazing price!