Like all Sig Kadets, the LT-40 behaves perfectly in flight, with true "hands off" stability on all axis. If the student pilot gets disoriented, simply let go of the control sticks and the LT-40 will recover itself and return to level flight within seconds.
Because the Kadet LT-40 is bigger than the average .40 size trainer, it has a much lighter wing loading, which lets it fly slower! Slower speed gives the student pilot more time to think and react to what the model is doing, thus making it easier to learn to fly R/C. Every major part of this kit has been pre-shaped, sawn, die-cut, laser-cut, routed, or whatever it takes to make it ready-to-install right out of the box.
Setups below would be my first picks depending on your purpose for the model. If your trying to learn or train a beginner, or just want a mild model with enough power to get out of trouble, pick setup around 1000 to 1400 foot per minute climb rate (fpm). An expert can do quite nice aerobatics on 1000 fpm, 1400 fpm and above is enough for first season pilots. Setups 2000 fpm and higher is agressive power.
Specifications:
Wingspan 770 in 1778 mm Wing Area 900 sq in / 58 sq dm Weight 5.5 - 6 lb 2494 - 2721g Wing Loading 14 - 15.5 oz/sq.ft. 4272 - 4730 g/sq-m Radio Required 4-Channel Recommended Engines .30 - .40 cubic in (4.9 - 6.6 cubic cm) 2-Stroke .40 - .50 cubic in (6.6 - 8.2 cubic cm) 4-stroke
Special notes about electric from Dave: This model makes an excellent electric conversion and is perhaps the most popular one of all time. Super light weight, large as or even larger than many 60 size trainers. For UAS purposes, the under wing compartment is 3" wide, 5 5/8" deep and 12 3/4" long.
Setup and Performance Chart
Motor
# Cells
Prop
Amps
Watts In
RPM
Thrust oz.
Pitch Speed MPH
Climb FPM
Est. Top Speed
Himax 3528-800
3
12x8
36.1
406
7,020
57
57
914
44
Himax 3528-0800
4
11x5.5
34.8
522
9,880
59
51
1131
47
Himax 3522-990
4
11x7
40.8
612
9,520
76
63
1319
51
Himax 3528-800
4
10x6
40.1
752
12,320
86
70
1541
55
Himax 3528-1000
4
10x5
42.2
633
12,260
74
58
1274
50
Himax 3528-1000
5
10x4
50.5
947
15,090
97
57
1758
55
Himax 5018-530
4
13x10
33.9
497
6,580
72
61
1236
50
Himax 5018-530
5
12x8
31.9
598
8,490
83
63
1455
53
Himax 5018-530
6
12x8
42.2
950
9,840
115
73
2201
61
Himax 5018-530
6
13x8
52.1
1172
9,360
136
69
2734
65
Estimates based on manufacturers provided constants using E-Calc. High Quality 2100-3000mah used as trial cell in calculations. Presumed model weight of 95oz. @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.
Temporarily out of stock, pending manufacturer production
Sodium-ion batteries are highly safe, have no risk of explosion and fire, and are environmentally friendly, non-toxic and non-polluting. No memory effect - the battery can be charged in any state of discharge, giving you peace of mind. The working principle of sodium ion batteries is similar to that of lithium-ion batteries, which utilize the insertion and removal process of sodium ions between the positive and negative electrodes to achieve charging and discharging.
Specifications:
Nominal Voltage: 3.1V
Work Voltage Range:1.5V-4.1V
Continuous charge /Discharge current:10C
Operating Temperature:-30°-60°
Cycle Life:More than 4000 times (0.5C/0.5C @80% SOH)
Nominal capacity: 1300mAh
Dimension: 18.3mm(D)65.3mm Approx.
Weight: 38+- 10 g
Advantage of Sodium ion Battery
1. Long cycle life: The cycle is longer, compared with Lithium ion battery, can reach to 4000-4500 times.
2. Safety: Sodium-ion cells can be discharged to 0V for transport, avoiding thermal run-away hazards.
3. High Power: The cells have continuous discharge current 10C Peak discharge current.
4. Low temperature: Can be used in low temperature environments, with a discharge capacity of up to 85% at a temperature of -30 degrees.
5. Wild Voltage range: The working voltage range is 1.5V-4.1V.
6. Environmental abundance: Sodium is over 1000 times more abundant than lithium and more evenly distributed worldwide. So its price is more stable.
7. LOWER COST: Sodium precursors (such as Na2CO3) are far cheaper than the equivalent lithium compounds.
8. Charge on Li-Ion mode set voltage to maximum 3.9-4.1V
This listing is for 1 (one, single cell), multiple cells shown for example only.
Panasonic (formerly Sanyo) KR-1800 SCE .91x1.69, 47g/1.65oz Sub C Fits in screw-apart glow starters. Most popular choice for this application. Manufacturers listed internal resistance is 6.5mOhm.
Furkawa KR-1800SCE Specifications
Battery Cell Size: Sub C - Flat Top
Voltage: 1.2 Volts
Capacity: 1800 mAh
Termination Style: Flat Top (Non-Extending)
Size / Dimension: Diameter: 0.91" (22.9mm) x Height: 1.70" (43.0mm)
Considered one of the most powerful servos in the micro class, the HS-65 is offered with a choice of "shock resistant" Metal or "zero wear" Karbonite gears. The 65 series features a top-ball bearing for long life and positive centering, 31 ounces/inches of power at 6 volts and is an excellent choice for higher performance micro helicopters, electric park flyers, and 1/18 scale cars.
Torque (4.8/6v)
Weight
Speed (4.8/6v)
Bearings
Size SAE
Size Metric
Type
24.99/30.55 oz.in,1.8/2.2 kg.cm
0.39 oz./11.2 g.
0.14/0.11s
1BB
0.92" x 0.45" x 0.94"
23.60 x 11.60 x 24.00mm
Analog
Choose Quantity Option below. Want 1, 2, or 3 servos? Select first option, then enter quantity 1, 2, or 3. Want a bulk discount? Select 4-Pack, then enter how many 4-Packs you want.
Are you having trouble shoe-horn'g a big model into a small car? Does the high cost of feeding a fuel guzzling .60 break the modeling budget? Well cheer up! Here's the answer to these and other big airplane problems. The little Kobra provides "hot dog" performance in a compact, easy to transport size. All of the great flying characteristics of our popular Kougar and King Kobra have been reduced into this junior-size bundle of excitement. The same sleek jet-style look, the same wall-to-wall aerobatic capabilities, the same built-in wing washout for slow speed stability, the same easy-to-build balsa fuselage with the unique formed plastic top - only in a smaller package! Plenty of room inside for standard size radios.
Kit features, Built-Up Balsa Wing, Basic Balsa Box Fuselage Structure, Molded ABS Plastic Fuselage Top, Molded Jet-Style Clear Canopy, Sheet Balsa Tail Surfaces, Formed Landing Gear Wires, Steerable Nose Gear, Full-Size Plans, Photo-Illustrated Assembly Manual, Decals For Both F-16 and T-38 Versions, SIG Easy Hinges, Engine Mounts and Complete Hardware Pack.
Specifications: Wingspan 45 in 1143 mm Wing Area 390 sq in 25 sq.dm Length 39-1/4 in 870 mm Radio Required 4-Channel Glow Engines: .20-.40 (3.1 - 6 sq cm) 2-Stroke Electric System: 300-600 watts (RRC Recommendation)
Notes from Dave: If you want a classic conversion to electric, here are my thoughts on this kit:
Setup and Performance Chart
Motor
# Cells
Prop
Amps
Watts In
RPM
Thrust oz.
Pitch Speed MPH
Climb FPM
Est. Top Speed
Himax HC3528-1000
3
10x7
37.9
426
9,820
51
65
2151
67
Himax HC3522-990
4
9x7
35
525
12,360
58
80
2514
75
Himax HC3528-1000
4
10x7
48.4
732
11,830
77
76
3615
81
Estimates based on manufacturers provided constants using E-Calc. High Quality 2200mah used as trial cell in calculations. Presumed model weight of 54oz. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of battery, ESC, and many other factors.
Temporarily out of stock, pending manufacturer production
A123/LithiumWerks Nano phosphate 2S 1800mah Pack 2-#18650 Cells. Finest RX pack technology and cell ever produced. See individual cell listing above for cell specifications.
Standard shape is Flat (side by side) as shown in photo. Stick packs may also be constructed as a "Stick" for narrow use.
There is no optional length for XH balance ends - use XH extension.
Use only Lithium chargers with an A123/LithiumWerks mode limiting charge voltage to 3.6V per cell.
Cell is purple in color as in last photo, same size as the #18650 1100mAh orange cell.
LithiumWerks AER18650M2A2 3.2 V 1.8 Ah Lithium Iron Phosphate (LiFePO4) Battery Specifications:
Manufacturers Part Number 320749-001
Nominal Ratings:
Voltage 3.2 V
Capacity @ C/5 Typical (Min) 1.8 Ah (1.7)
Energy 5.76 Wh
Specific Energy 133 Wh/kg
Energy Density 330 Wh/L
Impedance (1kHz ACIR) < 20 m?
Cycle Life at 0.5C/0.5C, 100% DOD > 4000 cycles
Discharging:
Max Continuous Discharge Current 5.4 A (3C)
Max Pulse Discharge Current, 10s 18 A (10C)
Minimum Voltage 2.0 V
Temperature -20 oC to 60 oC
Charging:
Recommended Charge Voltage 3.6 V
Recommended Charge Current <= 0.9 A (C/2)
Max Continuous Current, >10 oC 2.7 A (1.5C)
Terminate Charge @ 3.6 V < 36 mA
Float Voltage 3.5 V
Temperature 0 oC to 60 oC
Storage:
Temperature -30 oC to 70 oC
Mechanical:
Diameter O18.5 +/- 0.1 mm
Length 64.95 +/- 0.2 mm
Mass 43.4 g +/- 1.0 g
Certifications:
Transportation shipped @ <= 30% SOC UN 3480, UN 38.3
Safety UL 1973, IEC 62620
*pending early 2024
See A123/LithiumWerks 1800 Single Cells Above for all other available data.
Want a custom pack? See our custom pack listings, or email us at Sales@RadicalRC.com, and we can special make any kind of pack you require!
Note: Photo shows sample Rx pack with double lead option.
For checking pack voltage between flights, our best advice currently is: Leave model on after flight, plug loaded volt meter directly into pack balance plug (charge port ok but not preferred) hold load engaged, switch model off. Allow pack to drain into meter for 5 seconds, take your reading. See my blog post Checking A123 RX Packs For Recharge Point for help in this area.
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.
Fast, but not too fast. Maneuverable, but not tricky. A snap to build and surprisingly rugged compared to most. 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.
You should see them take evasive maneuvers in Dog Fighting. Evade with snap rolls into spins, Immelmann turns and a loop. Our radio-controlled Sunday Fighter airplane kits 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 wings are removable for storage/transport and for giving access to the extra large cabin area. From there you have easy access to install most any brand of radio and control linkages. However, the fully assembled model can fit in the trunk of most mid-sized cars.
Up-front, we've designed in a hatch that covers the battery/tank compartment. This area will easily handle 3s packs and 6 ounce tanks.
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).
There are two Sunday Fighters - the German version you see here, and the British version you can see at this link.
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.
Bolt on main gear Bending your own landing gear is hard. So that's why we include pre-bent main landing gear wire ready for you to assemble.
Front hatch Held in with magnets, this extra hatch gives you easy access to batteries or fuel.
Included Motor Box For electric power, we include the pieces to build this electric motor mounting box.
Design your color scheme Download this sheet to design your Heinschmitt's color scheme.
Additional items needed to complete our Sunday Fighter kit:
o Propeller
o Engine/Motor mount & mounting hardware
o 2-5 servos depending on setup: 2 mini for elevator/rudder, 2 Sub-Micro for ailerons/throttle
o "Y" servo harness (for ailerons)
o Pushrods (two 5" for ailerons, two 20" for elevator & rudder, one 9" for throttle if glow powered)
o Clevises for the pushrods (8 if electric, 10 if glow).
o 2 - 3.5" diameter wheels. We recommend Du-Bro's #350V Vintage wheels for the proper look.
o 1 - tailwheel assembly
o Covering
Flickr Album
Due to high demand, allow at least 2 weeks or more for shipment.
5S K6 Series 3000. 65C (195 amps) Constant; 130C (390 amps) Burst. High discharge cells. Industry Standard XH balance plug. Weight: 435 grams. Measures: 139mm L x 45mm W x 34mm H. SKU Number: KYP5S3000HD65C
Himax 3528 series motors are most generally used in 34-90 oz models depending on application. Replaces AXI 28 series motors. Manufactured to high standards for the discerning modeler. Package includes collet type prop adapter, prop saver, bullet females for your ESC and fasteners.
Specifications:
Weight
Size D x L
Amps
Shaft
Max Motor RPM
KV
Resistance
No Load Current
197g/6.9oz.
35.2mm(1.39") x 54.2mm(2.13")
15-48, 68 15s
5.0mm (.1969")
20k
1000
.020Rm
2.6A
Setup and Performance Chart
# Cells
Prop
Amps
Watts In
RPM
Thrust oz.
Pitch Speed MPH
2
10x10
19.5
145
5,960
22
55
2
11x10
26.4
182
5,590
28
62
2
12x10
29.4
219
5,210
34
48
2
14x10
39.2
292
4,470
42
41
3
10x10
33
368
7,990
41
74
3
12x8
42.5
471
7,100
59
52
3
12x10
46.6
520
6,680
57
62
3
13x6.5
44.3
494
6,900
63
41
3
13x8
48.4
540
6,500
65
48
3
13x10
52.8
589
6,080
63
56
3
14,700
51.5
575
6,210
68
40
3
14x10
58.5
653
5,530
68
51
3
15x10
63.7
737
6,850
86
44
4
11x10
54
804
8,580
70
80
4
12x8
56.6
842
8,280
82
61
4
13x6.5
58.9
876
8,010
74
48
5
10x10
57.5
1070
10,720
77
100
5
11x7
57.8
1075
10,680
95
69
6
10x6
55.1
1230
13,650
104
75
Estimates based on manufacturers provided constants using E-Calc. High Quality 2200mah used as trial cell in calculations. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of ESC, weather and many other variables. * Over reccomended maximum RPM.
12 pack #2 laser cut aircraft ply washers. 3/32" thick (Aproximately .098" or 2.5mm), OD .650", ID .089". Use in many applications such as wing hold down bolts where a softer washer is often desired. Use for shimming motor mounts, servos and anyplace fine thickness adjustment is needed. Work well with metal and plastic fasteners. SKU Number: RRC2FW332
3x2 Double Stick, 7.2V FDK (formerly Sanyo) 6-AA 2500 NIMH cells. "Twicell" (formerly Eneloop) low self discharge type which comes partially charged and is the same product as prior. Made to fit Hitec's new Aurora 9 and the Airtronics SD-10G. Excellent way to go when replacing a weak factory pack. 7.2 volts and 6 cells just more capacity. Comes without plug, choose below or reuse your old plug.
Same size as 700 and 1100 NiCad pack above. Less weight than 1400 NiCads above. Good cell where fast charging is not a needed but extra capacity is desirable. High capacity TX Battery, if you are sick of your TX running down. Yes, it is the same size as your current AA pack. A "AA" is a "AA". This is what your computer TX should have included!
7.2V Weight 234g / 8.25 oz.
Individual Cell Internal Impedance 20.0mΩ
All AA size cells over 1700mAh should not be fast charged ever! If you repeat this experiment, your on your own. I recommend only factory wall wart charging with units rated of 70mAh or less for these type cells. Break in (first forming charge) on 50mAh factory wall charger 700mAh-19.6 hours,1100-30.8 hours,1650-46.2 hours, 2500-70 hours. For 70mAh wall charger deduct 28% of time, for 100mAh wall charger deduct 50% of time. Forming charge (initial charge) on peak detection chargers is not recommended and voids warranty. Any peak or fast charger use on this pack voids warranty. Don't bother calling trying to get a warranty for failing to follow instructions. I've heard all the stories. They all end like this, "My battery does not cycle well now." and "It worked ok for a while but now it runs down fast shortly after charging". If you put any AA cell over 1700mAh capacity on your peak charger, it's bad. I've already made theses tests for you so you could avoid the pain. If you ruin one of these mega capacity TX packs, just order a new one and do better the second time.
Second from left motor in photo is the 3516 series.
Himax 3516 series motors are most generally used in 34-70 oz models depending on application. Replaces AXI 28 series motors. Manufactured to high standards for the discerning modeler. Package includes collet type prop adapter, prop saver, bullet females for your ESC and fasteners.
Specifications:
Weight
Size D x L
Amps
Shaft
Max Motor RPM
KV
Resistance
No Load Current
134g/4.7oz.
35.2mm(1.39") x 42.2mm(1.66")
10-34, 48 15s
5.0mm (.1969")
20k
1130
.030Rm
1.8A
Setup and Performance Chart
# Cells
Prop
Amps
Watts In
RPM
Thrust oz.
Pitch Speed MPH
2
10x10
26
195
7,710
29
62
2
12x10
39.4
296
5,800
42
54
3
9x7
28.9
325
10,510
46
68
3
9x9
34.2
385
10,100
45
84
3
10x5
30.3
341
10,400
53
47
3
10x7
37.9
426
9,820
58
63
3
11x5.5
41
461
9,590
66
48
3
11x7
47.2
531
9,110
70
59
4
8x6
29.2
438
14,480
54
80
4
9x4.5
32.9
494
14,160
65
58
4
Xoar 10x4
40
602
13,550
76
49
5
8x4
30.6
574
18,330
69
66
5
8x6
41.1
771
17,360
79
95
6
7x6
37.5
844
21,610
75
119
Estimates based on manufacturers provided constants using E-Calc. High Quality 2200mah used as trial cell in calculations. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of ESC, weather and many other variables. SKU Number: MPIHC35161130
HS-65HB/MG / 5065MG / 70MG / 5070MH - Horn & Hardware Set Micro 25T. This is the replacement HS-65HB/MG servo horn set from Hitec. This set contains one star shaped horn (24mm), one short (25.4mm), and one long (35mm) servo arm. Set also includes mounting screw to mount servo horn to servo and lock washers.
Harrier Supreme V2 ESC's are made for a wide variety of applications. Comes with extensive manual for programming all settings. Well documented. Programming card compatible available seperately.
Side By Side 9.6V FDK (formerly Sanyo) HR-AA NIMH Airtronics Stylus pack. HIGH capacity pack! Yes, it is the same size as your current AA pack. A "AA" is a "AA". This is what your computer TX should have come with! Tired of having to quick charge at the field? You can program all night friday night and fly all day saturday with a fully charged 1650. Also fits older Futaba gold case FG radios. In the Futaba case the pack appears to have 9 cells but one is a hollow dummy cell. This pack fits just fine and is correct voltage.
Maintenance charge and maximum form charge rate for this pack is not to exceed 100mah. See chart at top of category page for charging recommendations.
Form charge on factory wall charger only, not to exceed 100mah. Attempting to form charge (initial charge) on peak detection charger or by any other method not specifically stated here is not recommended and voids warranty.
These motors are for large models weighing 10-12Lb for 3-D flight, 17-22Lb for aerobatic flight and 22-30Lb for leisure flight. High torque to turn large props direct drive. Mounting hardware and connectors included. Himax Brushless motors are manufactured to high standards for the discerning modeler. Designed for light-weight, high efficiency, high torque and durability Himax Outrunner motors are sure to make today's radio controlled models perform.
All HC63 series outrunner motors include: Prop adapter, female wire connectors, motor mounting kit w/screws and two hex keys.
Specifications:
Weight
Size D x L
Amps
Shaft
Max Motor RPM
KV
Resistance
No Load Current
690g/24.3oz.
63mm(2.48") x 63mm(2.48")
30-80, 100 15s
8.0mm (.315")
10k
230
.025Rm
1.9A
Setup and Performance Chart
# Cells
Prop
Amps
Watts Input
RPM
Static Thrust oz.
Pitch Speed MPH
12
16x12
77.7
3636
8,550
349
97
12
18x8
81.1
3795
8,450
397
64
10
18x8
62.4
2434
7,390
295
56
10
16x12
59.6
2324
7,460
261
85
10
16x12
57.3
2625
7,630
276
87
10
15x10
43.2
1685
7,880
212
75
8
20x10
69.2
2159
5,650
279
54
8
20x12
77.5
2418
5,460
298
62
7
22x12
81.1
2214
4,620
286
53
Estimates based on manufacturers provided constants using E-Calc. Kokam 3200 used as trial cell in calculations. Actual performance may vary depending on components used, accuracy of data as provided by manufacturer, quality of ESC, weather and many other variables. SKU Number: MPIHC63320230